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Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
[mirror_ubuntu-artful-kernel.git] / drivers / net / usb / hso.c
1 /******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
6 * Filip Aben <f.aben@option.com>
7 * Denis Joseph Barrow <d.barow@option.com>
8 * Jan Dumon <j.dumon@option.com>
9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
10 * <ajb@spheresystems.co.uk>
11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
12 * Copyright (C) 2008 Novell, Inc.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
26 * USA
27 *
28 *
29 *****************************************************************************/
30
31 /******************************************************************************
32 *
33 * Description of the device:
34 *
35 * Interface 0: Contains the IP network interface on the bulk end points.
36 * The multiplexed serial ports are using the interrupt and
37 * control endpoints.
38 * Interrupt contains a bitmap telling which multiplexed
39 * serialport needs servicing.
40 *
41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
42 * port is opened, as this have a huge impact on the network port
43 * throughput.
44 *
45 * Interface 2: Standard modem interface - circuit switched interface, this
46 * can be used to make a standard ppp connection however it
47 * should not be used in conjunction with the IP network interface
48 * enabled for USB performance reasons i.e. if using this set
49 * ideally disable_net=1.
50 *
51 *****************************************************************************/
52
53 #include <linux/sched.h>
54 #include <linux/slab.h>
55 #include <linux/init.h>
56 #include <linux/delay.h>
57 #include <linux/netdevice.h>
58 #include <linux/module.h>
59 #include <linux/ethtool.h>
60 #include <linux/usb.h>
61 #include <linux/timer.h>
62 #include <linux/tty.h>
63 #include <linux/tty_driver.h>
64 #include <linux/tty_flip.h>
65 #include <linux/kmod.h>
66 #include <linux/rfkill.h>
67 #include <linux/ip.h>
68 #include <linux/uaccess.h>
69 #include <linux/usb/cdc.h>
70 #include <net/arp.h>
71 #include <asm/byteorder.h>
72 #include <linux/serial_core.h>
73 #include <linux/serial.h>
74
75
76 #define MOD_AUTHOR "Option Wireless"
77 #define MOD_DESCRIPTION "USB High Speed Option driver"
78 #define MOD_LICENSE "GPL"
79
80 #define HSO_MAX_NET_DEVICES 10
81 #define HSO__MAX_MTU 2048
82 #define DEFAULT_MTU 1500
83 #define DEFAULT_MRU 1500
84
85 #define CTRL_URB_RX_SIZE 1024
86 #define CTRL_URB_TX_SIZE 64
87
88 #define BULK_URB_RX_SIZE 4096
89 #define BULK_URB_TX_SIZE 8192
90
91 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
92 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
93 #define MUX_BULK_RX_BUF_COUNT 4
94 #define USB_TYPE_OPTION_VENDOR 0x20
95
96 /* These definitions are used with the struct hso_net flags element */
97 /* - use *_bit operations on it. (bit indices not values.) */
98 #define HSO_NET_RUNNING 0
99
100 #define HSO_NET_TX_TIMEOUT (HZ*10)
101
102 #define HSO_SERIAL_MAGIC 0x48534f31
103
104 /* Number of ttys to handle */
105 #define HSO_SERIAL_TTY_MINORS 256
106
107 #define MAX_RX_URBS 2
108
109 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
110 {
111 if (tty)
112 return tty->driver_data;
113 return NULL;
114 }
115
116 /*****************************************************************************/
117 /* Debugging functions */
118 /*****************************************************************************/
119 #define D__(lvl_, fmt, arg...) \
120 do { \
121 printk(lvl_ "[%d:%s]: " fmt "\n", \
122 __LINE__, __func__, ## arg); \
123 } while (0)
124
125 #define D_(lvl, args...) \
126 do { \
127 if (lvl & debug) \
128 D__(KERN_INFO, args); \
129 } while (0)
130
131 #define D1(args...) D_(0x01, ##args)
132 #define D2(args...) D_(0x02, ##args)
133 #define D3(args...) D_(0x04, ##args)
134 #define D4(args...) D_(0x08, ##args)
135 #define D5(args...) D_(0x10, ##args)
136
137 /*****************************************************************************/
138 /* Enumerators */
139 /*****************************************************************************/
140 enum pkt_parse_state {
141 WAIT_IP,
142 WAIT_DATA,
143 WAIT_SYNC
144 };
145
146 /*****************************************************************************/
147 /* Structs */
148 /*****************************************************************************/
149
150 struct hso_shared_int {
151 struct usb_endpoint_descriptor *intr_endp;
152 void *shared_intr_buf;
153 struct urb *shared_intr_urb;
154 struct usb_device *usb;
155 int use_count;
156 int ref_count;
157 struct mutex shared_int_lock;
158 };
159
160 struct hso_net {
161 struct hso_device *parent;
162 struct net_device *net;
163 struct rfkill *rfkill;
164
165 struct usb_endpoint_descriptor *in_endp;
166 struct usb_endpoint_descriptor *out_endp;
167
168 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
169 struct urb *mux_bulk_tx_urb;
170 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
171 void *mux_bulk_tx_buf;
172
173 struct sk_buff *skb_rx_buf;
174 struct sk_buff *skb_tx_buf;
175
176 enum pkt_parse_state rx_parse_state;
177 spinlock_t net_lock;
178
179 unsigned short rx_buf_size;
180 unsigned short rx_buf_missing;
181 struct iphdr rx_ip_hdr;
182
183 unsigned long flags;
184 };
185
186 enum rx_ctrl_state{
187 RX_IDLE,
188 RX_SENT,
189 RX_PENDING
190 };
191
192 #define BM_REQUEST_TYPE (0xa1)
193 #define B_NOTIFICATION (0x20)
194 #define W_VALUE (0x0)
195 #define W_INDEX (0x2)
196 #define W_LENGTH (0x2)
197
198 #define B_OVERRUN (0x1<<6)
199 #define B_PARITY (0x1<<5)
200 #define B_FRAMING (0x1<<4)
201 #define B_RING_SIGNAL (0x1<<3)
202 #define B_BREAK (0x1<<2)
203 #define B_TX_CARRIER (0x1<<1)
204 #define B_RX_CARRIER (0x1<<0)
205
206 struct hso_serial_state_notification {
207 u8 bmRequestType;
208 u8 bNotification;
209 u16 wValue;
210 u16 wIndex;
211 u16 wLength;
212 u16 UART_state_bitmap;
213 } __packed;
214
215 struct hso_tiocmget {
216 struct mutex mutex;
217 wait_queue_head_t waitq;
218 int intr_completed;
219 struct usb_endpoint_descriptor *endp;
220 struct urb *urb;
221 struct hso_serial_state_notification serial_state_notification;
222 u16 prev_UART_state_bitmap;
223 struct uart_icount icount;
224 };
225
226
227 struct hso_serial {
228 struct hso_device *parent;
229 int magic;
230 u8 minor;
231
232 struct hso_shared_int *shared_int;
233
234 /* rx/tx urb could be either a bulk urb or a control urb depending
235 on which serial port it is used on. */
236 struct urb *rx_urb[MAX_RX_URBS];
237 u8 num_rx_urbs;
238 u8 *rx_data[MAX_RX_URBS];
239 u16 rx_data_length; /* should contain allocated length */
240
241 struct urb *tx_urb;
242 u8 *tx_data;
243 u8 *tx_buffer;
244 u16 tx_data_length; /* should contain allocated length */
245 u16 tx_data_count;
246 u16 tx_buffer_count;
247 struct usb_ctrlrequest ctrl_req_tx;
248 struct usb_ctrlrequest ctrl_req_rx;
249
250 struct usb_endpoint_descriptor *in_endp;
251 struct usb_endpoint_descriptor *out_endp;
252
253 enum rx_ctrl_state rx_state;
254 u8 rts_state;
255 u8 dtr_state;
256 unsigned tx_urb_used:1;
257
258 /* from usb_serial_port */
259 struct tty_struct *tty;
260 int open_count;
261 spinlock_t serial_lock;
262
263 int (*write_data) (struct hso_serial *serial);
264 struct hso_tiocmget *tiocmget;
265 /* Hacks required to get flow control
266 * working on the serial receive buffers
267 * so as not to drop characters on the floor.
268 */
269 int curr_rx_urb_idx;
270 u16 curr_rx_urb_offset;
271 u8 rx_urb_filled[MAX_RX_URBS];
272 struct tasklet_struct unthrottle_tasklet;
273 struct work_struct retry_unthrottle_workqueue;
274 };
275
276 struct hso_device {
277 union {
278 struct hso_serial *dev_serial;
279 struct hso_net *dev_net;
280 } port_data;
281
282 u32 port_spec;
283
284 u8 is_active;
285 u8 usb_gone;
286 struct work_struct async_get_intf;
287 struct work_struct async_put_intf;
288 struct work_struct reset_device;
289
290 struct usb_device *usb;
291 struct usb_interface *interface;
292
293 struct device *dev;
294 struct kref ref;
295 struct mutex mutex;
296 };
297
298 /* Type of interface */
299 #define HSO_INTF_MASK 0xFF00
300 #define HSO_INTF_MUX 0x0100
301 #define HSO_INTF_BULK 0x0200
302
303 /* Type of port */
304 #define HSO_PORT_MASK 0xFF
305 #define HSO_PORT_NO_PORT 0x0
306 #define HSO_PORT_CONTROL 0x1
307 #define HSO_PORT_APP 0x2
308 #define HSO_PORT_GPS 0x3
309 #define HSO_PORT_PCSC 0x4
310 #define HSO_PORT_APP2 0x5
311 #define HSO_PORT_GPS_CONTROL 0x6
312 #define HSO_PORT_MSD 0x7
313 #define HSO_PORT_VOICE 0x8
314 #define HSO_PORT_DIAG2 0x9
315 #define HSO_PORT_DIAG 0x10
316 #define HSO_PORT_MODEM 0x11
317 #define HSO_PORT_NETWORK 0x12
318
319 /* Additional device info */
320 #define HSO_INFO_MASK 0xFF000000
321 #define HSO_INFO_CRC_BUG 0x01000000
322
323 /*****************************************************************************/
324 /* Prototypes */
325 /*****************************************************************************/
326 /* Serial driver functions */
327 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
328 unsigned int set, unsigned int clear);
329 static void ctrl_callback(struct urb *urb);
330 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
331 static void hso_kick_transmit(struct hso_serial *serial);
332 /* Helper functions */
333 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
334 struct usb_device *usb, gfp_t gfp);
335 static void handle_usb_error(int status, const char *function,
336 struct hso_device *hso_dev);
337 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
338 int type, int dir);
339 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
340 static void hso_free_interface(struct usb_interface *intf);
341 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
342 static int hso_stop_serial_device(struct hso_device *hso_dev);
343 static int hso_start_net_device(struct hso_device *hso_dev);
344 static void hso_free_shared_int(struct hso_shared_int *shared_int);
345 static int hso_stop_net_device(struct hso_device *hso_dev);
346 static void hso_serial_ref_free(struct kref *ref);
347 static void hso_std_serial_read_bulk_callback(struct urb *urb);
348 static int hso_mux_serial_read(struct hso_serial *serial);
349 static void async_get_intf(struct work_struct *data);
350 static void async_put_intf(struct work_struct *data);
351 static int hso_put_activity(struct hso_device *hso_dev);
352 static int hso_get_activity(struct hso_device *hso_dev);
353 static void tiocmget_intr_callback(struct urb *urb);
354 static void reset_device(struct work_struct *data);
355 /*****************************************************************************/
356 /* Helping functions */
357 /*****************************************************************************/
358
359 /* #define DEBUG */
360
361 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
362 {
363 return hso_dev->port_data.dev_net;
364 }
365
366 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
367 {
368 return hso_dev->port_data.dev_serial;
369 }
370
371 /* Debugging functions */
372 #ifdef DEBUG
373 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
374 unsigned int len)
375 {
376 static char name[255];
377
378 sprintf(name, "hso[%d:%s]", line_count, func_name);
379 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
380 }
381
382 #define DUMP(buf_, len_) \
383 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
384
385 #define DUMP1(buf_, len_) \
386 do { \
387 if (0x01 & debug) \
388 DUMP(buf_, len_); \
389 } while (0)
390 #else
391 #define DUMP(buf_, len_)
392 #define DUMP1(buf_, len_)
393 #endif
394
395 /* module parameters */
396 static int debug;
397 static int tty_major;
398 static int disable_net;
399
400 /* driver info */
401 static const char driver_name[] = "hso";
402 static const char tty_filename[] = "ttyHS";
403 static const char *version = __FILE__ ": " MOD_AUTHOR;
404 /* the usb driver itself (registered in hso_init) */
405 static struct usb_driver hso_driver;
406 /* serial structures */
407 static struct tty_driver *tty_drv;
408 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
409 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
410 static spinlock_t serial_table_lock;
411
412 static const s32 default_port_spec[] = {
413 HSO_INTF_MUX | HSO_PORT_NETWORK,
414 HSO_INTF_BULK | HSO_PORT_DIAG,
415 HSO_INTF_BULK | HSO_PORT_MODEM,
416 0
417 };
418
419 static const s32 icon321_port_spec[] = {
420 HSO_INTF_MUX | HSO_PORT_NETWORK,
421 HSO_INTF_BULK | HSO_PORT_DIAG2,
422 HSO_INTF_BULK | HSO_PORT_MODEM,
423 HSO_INTF_BULK | HSO_PORT_DIAG,
424 0
425 };
426
427 #define default_port_device(vendor, product) \
428 USB_DEVICE(vendor, product), \
429 .driver_info = (kernel_ulong_t)default_port_spec
430
431 #define icon321_port_device(vendor, product) \
432 USB_DEVICE(vendor, product), \
433 .driver_info = (kernel_ulong_t)icon321_port_spec
434
435 /* list of devices we support */
436 static const struct usb_device_id hso_ids[] = {
437 {default_port_device(0x0af0, 0x6711)},
438 {default_port_device(0x0af0, 0x6731)},
439 {default_port_device(0x0af0, 0x6751)},
440 {default_port_device(0x0af0, 0x6771)},
441 {default_port_device(0x0af0, 0x6791)},
442 {default_port_device(0x0af0, 0x6811)},
443 {default_port_device(0x0af0, 0x6911)},
444 {default_port_device(0x0af0, 0x6951)},
445 {default_port_device(0x0af0, 0x6971)},
446 {default_port_device(0x0af0, 0x7011)},
447 {default_port_device(0x0af0, 0x7031)},
448 {default_port_device(0x0af0, 0x7051)},
449 {default_port_device(0x0af0, 0x7071)},
450 {default_port_device(0x0af0, 0x7111)},
451 {default_port_device(0x0af0, 0x7211)},
452 {default_port_device(0x0af0, 0x7251)},
453 {default_port_device(0x0af0, 0x7271)},
454 {default_port_device(0x0af0, 0x7311)},
455 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
456 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
457 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
458 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
459 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
460 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
461 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
462 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
463 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
464 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
465 {USB_DEVICE(0x0af0, 0x7701)},
466 {USB_DEVICE(0x0af0, 0x7706)},
467 {USB_DEVICE(0x0af0, 0x7801)},
468 {USB_DEVICE(0x0af0, 0x7901)},
469 {USB_DEVICE(0x0af0, 0x7A01)},
470 {USB_DEVICE(0x0af0, 0x7A05)},
471 {USB_DEVICE(0x0af0, 0x8200)},
472 {USB_DEVICE(0x0af0, 0x8201)},
473 {USB_DEVICE(0x0af0, 0x8300)},
474 {USB_DEVICE(0x0af0, 0x8302)},
475 {USB_DEVICE(0x0af0, 0x8304)},
476 {USB_DEVICE(0x0af0, 0x8400)},
477 {USB_DEVICE(0x0af0, 0x8600)},
478 {USB_DEVICE(0x0af0, 0x8800)},
479 {USB_DEVICE(0x0af0, 0x8900)},
480 {USB_DEVICE(0x0af0, 0x9000)},
481 {USB_DEVICE(0x0af0, 0xd035)},
482 {USB_DEVICE(0x0af0, 0xd055)},
483 {USB_DEVICE(0x0af0, 0xd155)},
484 {USB_DEVICE(0x0af0, 0xd255)},
485 {USB_DEVICE(0x0af0, 0xd057)},
486 {USB_DEVICE(0x0af0, 0xd157)},
487 {USB_DEVICE(0x0af0, 0xd257)},
488 {USB_DEVICE(0x0af0, 0xd357)},
489 {USB_DEVICE(0x0af0, 0xd058)},
490 {USB_DEVICE(0x0af0, 0xc100)},
491 {}
492 };
493 MODULE_DEVICE_TABLE(usb, hso_ids);
494
495 /* Sysfs attribute */
496 static ssize_t hso_sysfs_show_porttype(struct device *dev,
497 struct device_attribute *attr,
498 char *buf)
499 {
500 struct hso_device *hso_dev = dev_get_drvdata(dev);
501 char *port_name;
502
503 if (!hso_dev)
504 return 0;
505
506 switch (hso_dev->port_spec & HSO_PORT_MASK) {
507 case HSO_PORT_CONTROL:
508 port_name = "Control";
509 break;
510 case HSO_PORT_APP:
511 port_name = "Application";
512 break;
513 case HSO_PORT_APP2:
514 port_name = "Application2";
515 break;
516 case HSO_PORT_GPS:
517 port_name = "GPS";
518 break;
519 case HSO_PORT_GPS_CONTROL:
520 port_name = "GPS Control";
521 break;
522 case HSO_PORT_PCSC:
523 port_name = "PCSC";
524 break;
525 case HSO_PORT_DIAG:
526 port_name = "Diagnostic";
527 break;
528 case HSO_PORT_DIAG2:
529 port_name = "Diagnostic2";
530 break;
531 case HSO_PORT_MODEM:
532 port_name = "Modem";
533 break;
534 case HSO_PORT_NETWORK:
535 port_name = "Network";
536 break;
537 default:
538 port_name = "Unknown";
539 break;
540 }
541
542 return sprintf(buf, "%s\n", port_name);
543 }
544 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
545
546 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
547 {
548 int idx;
549
550 for (idx = 0; idx < serial->num_rx_urbs; idx++)
551 if (serial->rx_urb[idx] == urb)
552 return idx;
553 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
554 return -1;
555 }
556
557 /* converts mux value to a port spec value */
558 static u32 hso_mux_to_port(int mux)
559 {
560 u32 result;
561
562 switch (mux) {
563 case 0x1:
564 result = HSO_PORT_CONTROL;
565 break;
566 case 0x2:
567 result = HSO_PORT_APP;
568 break;
569 case 0x4:
570 result = HSO_PORT_PCSC;
571 break;
572 case 0x8:
573 result = HSO_PORT_GPS;
574 break;
575 case 0x10:
576 result = HSO_PORT_APP2;
577 break;
578 default:
579 result = HSO_PORT_NO_PORT;
580 }
581 return result;
582 }
583
584 /* converts port spec value to a mux value */
585 static u32 hso_port_to_mux(int port)
586 {
587 u32 result;
588
589 switch (port & HSO_PORT_MASK) {
590 case HSO_PORT_CONTROL:
591 result = 0x0;
592 break;
593 case HSO_PORT_APP:
594 result = 0x1;
595 break;
596 case HSO_PORT_PCSC:
597 result = 0x2;
598 break;
599 case HSO_PORT_GPS:
600 result = 0x3;
601 break;
602 case HSO_PORT_APP2:
603 result = 0x4;
604 break;
605 default:
606 result = 0x0;
607 }
608 return result;
609 }
610
611 static struct hso_serial *get_serial_by_shared_int_and_type(
612 struct hso_shared_int *shared_int,
613 int mux)
614 {
615 int i, port;
616
617 port = hso_mux_to_port(mux);
618
619 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
620 if (serial_table[i] &&
621 (dev2ser(serial_table[i])->shared_int == shared_int) &&
622 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
623 return dev2ser(serial_table[i]);
624 }
625 }
626
627 return NULL;
628 }
629
630 static struct hso_serial *get_serial_by_index(unsigned index)
631 {
632 struct hso_serial *serial = NULL;
633 unsigned long flags;
634
635 spin_lock_irqsave(&serial_table_lock, flags);
636 if (serial_table[index])
637 serial = dev2ser(serial_table[index]);
638 spin_unlock_irqrestore(&serial_table_lock, flags);
639
640 return serial;
641 }
642
643 static int get_free_serial_index(void)
644 {
645 int index;
646 unsigned long flags;
647
648 spin_lock_irqsave(&serial_table_lock, flags);
649 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
650 if (serial_table[index] == NULL) {
651 spin_unlock_irqrestore(&serial_table_lock, flags);
652 return index;
653 }
654 }
655 spin_unlock_irqrestore(&serial_table_lock, flags);
656
657 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
658 return -1;
659 }
660
661 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
662 {
663 unsigned long flags;
664
665 spin_lock_irqsave(&serial_table_lock, flags);
666 if (serial)
667 serial_table[index] = serial->parent;
668 else
669 serial_table[index] = NULL;
670 spin_unlock_irqrestore(&serial_table_lock, flags);
671 }
672
673 static void handle_usb_error(int status, const char *function,
674 struct hso_device *hso_dev)
675 {
676 char *explanation;
677
678 switch (status) {
679 case -ENODEV:
680 explanation = "no device";
681 break;
682 case -ENOENT:
683 explanation = "endpoint not enabled";
684 break;
685 case -EPIPE:
686 explanation = "endpoint stalled";
687 break;
688 case -ENOSPC:
689 explanation = "not enough bandwidth";
690 break;
691 case -ESHUTDOWN:
692 explanation = "device disabled";
693 break;
694 case -EHOSTUNREACH:
695 explanation = "device suspended";
696 break;
697 case -EINVAL:
698 case -EAGAIN:
699 case -EFBIG:
700 case -EMSGSIZE:
701 explanation = "internal error";
702 break;
703 case -EILSEQ:
704 case -EPROTO:
705 case -ETIME:
706 case -ETIMEDOUT:
707 explanation = "protocol error";
708 if (hso_dev)
709 schedule_work(&hso_dev->reset_device);
710 break;
711 default:
712 explanation = "unknown status";
713 break;
714 }
715
716 /* log a meaningful explanation of an USB status */
717 D1("%s: received USB status - %s (%d)", function, explanation, status);
718 }
719
720 /* Network interface functions */
721
722 /* called when net interface is brought up by ifconfig */
723 static int hso_net_open(struct net_device *net)
724 {
725 struct hso_net *odev = netdev_priv(net);
726 unsigned long flags = 0;
727
728 if (!odev) {
729 dev_err(&net->dev, "No net device !\n");
730 return -ENODEV;
731 }
732
733 odev->skb_tx_buf = NULL;
734
735 /* setup environment */
736 spin_lock_irqsave(&odev->net_lock, flags);
737 odev->rx_parse_state = WAIT_IP;
738 odev->rx_buf_size = 0;
739 odev->rx_buf_missing = sizeof(struct iphdr);
740 spin_unlock_irqrestore(&odev->net_lock, flags);
741
742 /* We are up and running. */
743 set_bit(HSO_NET_RUNNING, &odev->flags);
744 hso_start_net_device(odev->parent);
745
746 /* Tell the kernel we are ready to start receiving from it */
747 netif_start_queue(net);
748
749 return 0;
750 }
751
752 /* called when interface is brought down by ifconfig */
753 static int hso_net_close(struct net_device *net)
754 {
755 struct hso_net *odev = netdev_priv(net);
756
757 /* we don't need the queue anymore */
758 netif_stop_queue(net);
759 /* no longer running */
760 clear_bit(HSO_NET_RUNNING, &odev->flags);
761
762 hso_stop_net_device(odev->parent);
763
764 /* done */
765 return 0;
766 }
767
768 /* USB tells is xmit done, we should start the netqueue again */
769 static void write_bulk_callback(struct urb *urb)
770 {
771 struct hso_net *odev = urb->context;
772 int status = urb->status;
773
774 /* Sanity check */
775 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
776 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
777 return;
778 }
779
780 /* Do we still have a valid kernel network device? */
781 if (!netif_device_present(odev->net)) {
782 dev_err(&urb->dev->dev, "%s: net device not present\n",
783 __func__);
784 return;
785 }
786
787 /* log status, but don't act on it, we don't need to resubmit anything
788 * anyhow */
789 if (status)
790 handle_usb_error(status, __func__, odev->parent);
791
792 hso_put_activity(odev->parent);
793
794 /* Tell the network interface we are ready for another frame */
795 netif_wake_queue(odev->net);
796 }
797
798 /* called by kernel when we need to transmit a packet */
799 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
800 struct net_device *net)
801 {
802 struct hso_net *odev = netdev_priv(net);
803 int result;
804
805 /* Tell the kernel, "No more frames 'til we are done with this one." */
806 netif_stop_queue(net);
807 if (hso_get_activity(odev->parent) == -EAGAIN) {
808 odev->skb_tx_buf = skb;
809 return NETDEV_TX_OK;
810 }
811
812 /* log if asked */
813 DUMP1(skb->data, skb->len);
814 /* Copy it from kernel memory to OUR memory */
815 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
816 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
817
818 /* Fill in the URB for shipping it out. */
819 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
820 odev->parent->usb,
821 usb_sndbulkpipe(odev->parent->usb,
822 odev->out_endp->
823 bEndpointAddress & 0x7F),
824 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
825 odev);
826
827 /* Deal with the Zero Length packet problem, I hope */
828 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
829
830 /* Send the URB on its merry way. */
831 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
832 if (result) {
833 dev_warn(&odev->parent->interface->dev,
834 "failed mux_bulk_tx_urb %d\n", result);
835 net->stats.tx_errors++;
836 netif_start_queue(net);
837 } else {
838 net->stats.tx_packets++;
839 net->stats.tx_bytes += skb->len;
840 }
841 dev_kfree_skb(skb);
842 /* we're done */
843 return NETDEV_TX_OK;
844 }
845
846 static const struct ethtool_ops ops = {
847 .get_link = ethtool_op_get_link
848 };
849
850 /* called when a packet did not ack after watchdogtimeout */
851 static void hso_net_tx_timeout(struct net_device *net)
852 {
853 struct hso_net *odev = netdev_priv(net);
854
855 if (!odev)
856 return;
857
858 /* Tell syslog we are hosed. */
859 dev_warn(&net->dev, "Tx timed out.\n");
860
861 /* Tear the waiting frame off the list */
862 if (odev->mux_bulk_tx_urb &&
863 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
864 usb_unlink_urb(odev->mux_bulk_tx_urb);
865
866 /* Update statistics */
867 net->stats.tx_errors++;
868 }
869
870 /* make a real packet from the received USB buffer */
871 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
872 unsigned int count, unsigned char is_eop)
873 {
874 unsigned short temp_bytes;
875 unsigned short buffer_offset = 0;
876 unsigned short frame_len;
877 unsigned char *tmp_rx_buf;
878
879 /* log if needed */
880 D1("Rx %d bytes", count);
881 DUMP(ip_pkt, min(128, (int)count));
882
883 while (count) {
884 switch (odev->rx_parse_state) {
885 case WAIT_IP:
886 /* waiting for IP header. */
887 /* wanted bytes - size of ip header */
888 temp_bytes =
889 (count <
890 odev->rx_buf_missing) ? count : odev->
891 rx_buf_missing;
892
893 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
894 odev->rx_buf_size, ip_pkt + buffer_offset,
895 temp_bytes);
896
897 odev->rx_buf_size += temp_bytes;
898 buffer_offset += temp_bytes;
899 odev->rx_buf_missing -= temp_bytes;
900 count -= temp_bytes;
901
902 if (!odev->rx_buf_missing) {
903 /* header is complete allocate an sk_buffer and
904 * continue to WAIT_DATA */
905 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
906
907 if ((frame_len > DEFAULT_MRU) ||
908 (frame_len < sizeof(struct iphdr))) {
909 dev_err(&odev->net->dev,
910 "Invalid frame (%d) length\n",
911 frame_len);
912 odev->rx_parse_state = WAIT_SYNC;
913 continue;
914 }
915 /* Allocate an sk_buff */
916 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
917 frame_len);
918 if (!odev->skb_rx_buf) {
919 /* We got no receive buffer. */
920 D1("could not allocate memory");
921 odev->rx_parse_state = WAIT_SYNC;
922 return;
923 }
924
925 /* Copy what we got so far. make room for iphdr
926 * after tail. */
927 tmp_rx_buf =
928 skb_put(odev->skb_rx_buf,
929 sizeof(struct iphdr));
930 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
931 sizeof(struct iphdr));
932
933 /* ETH_HLEN */
934 odev->rx_buf_size = sizeof(struct iphdr);
935
936 /* Filip actually use .tot_len */
937 odev->rx_buf_missing =
938 frame_len - sizeof(struct iphdr);
939 odev->rx_parse_state = WAIT_DATA;
940 }
941 break;
942
943 case WAIT_DATA:
944 temp_bytes = (count < odev->rx_buf_missing)
945 ? count : odev->rx_buf_missing;
946
947 /* Copy the rest of the bytes that are left in the
948 * buffer into the waiting sk_buf. */
949 /* Make room for temp_bytes after tail. */
950 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
951 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
952
953 odev->rx_buf_missing -= temp_bytes;
954 count -= temp_bytes;
955 buffer_offset += temp_bytes;
956 odev->rx_buf_size += temp_bytes;
957 if (!odev->rx_buf_missing) {
958 /* Packet is complete. Inject into stack. */
959 /* We have IP packet here */
960 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
961 /* don't check it */
962 odev->skb_rx_buf->ip_summed =
963 CHECKSUM_UNNECESSARY;
964
965 skb_reset_mac_header(odev->skb_rx_buf);
966
967 /* Ship it off to the kernel */
968 netif_rx(odev->skb_rx_buf);
969 /* No longer our buffer. */
970 odev->skb_rx_buf = NULL;
971
972 /* update out statistics */
973 odev->net->stats.rx_packets++;
974
975 odev->net->stats.rx_bytes += odev->rx_buf_size;
976
977 odev->rx_buf_size = 0;
978 odev->rx_buf_missing = sizeof(struct iphdr);
979 odev->rx_parse_state = WAIT_IP;
980 }
981 break;
982
983 case WAIT_SYNC:
984 D1(" W_S");
985 count = 0;
986 break;
987 default:
988 D1(" ");
989 count--;
990 break;
991 }
992 }
993
994 /* Recovery mechanism for WAIT_SYNC state. */
995 if (is_eop) {
996 if (odev->rx_parse_state == WAIT_SYNC) {
997 odev->rx_parse_state = WAIT_IP;
998 odev->rx_buf_size = 0;
999 odev->rx_buf_missing = sizeof(struct iphdr);
1000 }
1001 }
1002 }
1003
1004 /* Moving data from usb to kernel (in interrupt state) */
1005 static void read_bulk_callback(struct urb *urb)
1006 {
1007 struct hso_net *odev = urb->context;
1008 struct net_device *net;
1009 int result;
1010 int status = urb->status;
1011
1012 /* is al ok? (Filip: Who's Al ?) */
1013 if (status) {
1014 handle_usb_error(status, __func__, odev->parent);
1015 return;
1016 }
1017
1018 /* Sanity check */
1019 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1020 D1("BULK IN callback but driver is not active!");
1021 return;
1022 }
1023 usb_mark_last_busy(urb->dev);
1024
1025 net = odev->net;
1026
1027 if (!netif_device_present(net)) {
1028 /* Somebody killed our network interface... */
1029 return;
1030 }
1031
1032 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1033 u32 rest;
1034 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1035 rest = urb->actual_length %
1036 le16_to_cpu(odev->in_endp->wMaxPacketSize);
1037 if (((rest == 5) || (rest == 6)) &&
1038 !memcmp(((u8 *) urb->transfer_buffer) +
1039 urb->actual_length - 4, crc_check, 4)) {
1040 urb->actual_length -= 4;
1041 }
1042 }
1043
1044 /* do we even have a packet? */
1045 if (urb->actual_length) {
1046 /* Handle the IP stream, add header and push it onto network
1047 * stack if the packet is complete. */
1048 spin_lock(&odev->net_lock);
1049 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1050 (urb->transfer_buffer_length >
1051 urb->actual_length) ? 1 : 0);
1052 spin_unlock(&odev->net_lock);
1053 }
1054
1055 /* We are done with this URB, resubmit it. Prep the USB to wait for
1056 * another frame. Reuse same as received. */
1057 usb_fill_bulk_urb(urb,
1058 odev->parent->usb,
1059 usb_rcvbulkpipe(odev->parent->usb,
1060 odev->in_endp->
1061 bEndpointAddress & 0x7F),
1062 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1063 read_bulk_callback, odev);
1064
1065 /* Give this to the USB subsystem so it can tell us when more data
1066 * arrives. */
1067 result = usb_submit_urb(urb, GFP_ATOMIC);
1068 if (result)
1069 dev_warn(&odev->parent->interface->dev,
1070 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1071 result);
1072 }
1073
1074 /* Serial driver functions */
1075
1076 static void hso_init_termios(struct ktermios *termios)
1077 {
1078 /*
1079 * The default requirements for this device are:
1080 */
1081 termios->c_iflag &=
1082 ~(IGNBRK /* disable ignore break */
1083 | BRKINT /* disable break causes interrupt */
1084 | PARMRK /* disable mark parity errors */
1085 | ISTRIP /* disable clear high bit of input characters */
1086 | INLCR /* disable translate NL to CR */
1087 | IGNCR /* disable ignore CR */
1088 | ICRNL /* disable translate CR to NL */
1089 | IXON); /* disable enable XON/XOFF flow control */
1090
1091 /* disable postprocess output characters */
1092 termios->c_oflag &= ~OPOST;
1093
1094 termios->c_lflag &=
1095 ~(ECHO /* disable echo input characters */
1096 | ECHONL /* disable echo new line */
1097 | ICANON /* disable erase, kill, werase, and rprnt
1098 special characters */
1099 | ISIG /* disable interrupt, quit, and suspend special
1100 characters */
1101 | IEXTEN); /* disable non-POSIX special characters */
1102
1103 termios->c_cflag &=
1104 ~(CSIZE /* no size */
1105 | PARENB /* disable parity bit */
1106 | CBAUD /* clear current baud rate */
1107 | CBAUDEX); /* clear current buad rate */
1108
1109 termios->c_cflag |= CS8; /* character size 8 bits */
1110
1111 /* baud rate 115200 */
1112 tty_termios_encode_baud_rate(termios, 115200, 115200);
1113 }
1114
1115 static void _hso_serial_set_termios(struct tty_struct *tty,
1116 struct ktermios *old)
1117 {
1118 struct hso_serial *serial = get_serial_by_tty(tty);
1119 struct ktermios *termios;
1120
1121 if (!serial) {
1122 printk(KERN_ERR "%s: no tty structures", __func__);
1123 return;
1124 }
1125
1126 D4("port %d", serial->minor);
1127
1128 /*
1129 * Fix up unsupported bits
1130 */
1131 termios = tty->termios;
1132 termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1133
1134 termios->c_cflag &=
1135 ~(CSIZE /* no size */
1136 | PARENB /* disable parity bit */
1137 | CBAUD /* clear current baud rate */
1138 | CBAUDEX); /* clear current buad rate */
1139
1140 termios->c_cflag |= CS8; /* character size 8 bits */
1141
1142 /* baud rate 115200 */
1143 tty_encode_baud_rate(tty, 115200, 115200);
1144 }
1145
1146 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1147 {
1148 int result;
1149 /* We are done with this URB, resubmit it. Prep the USB to wait for
1150 * another frame */
1151 usb_fill_bulk_urb(urb, serial->parent->usb,
1152 usb_rcvbulkpipe(serial->parent->usb,
1153 serial->in_endp->
1154 bEndpointAddress & 0x7F),
1155 urb->transfer_buffer, serial->rx_data_length,
1156 hso_std_serial_read_bulk_callback, serial);
1157 /* Give this to the USB subsystem so it can tell us when more data
1158 * arrives. */
1159 result = usb_submit_urb(urb, GFP_ATOMIC);
1160 if (result) {
1161 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1162 __func__, result);
1163 }
1164 }
1165
1166
1167
1168
1169 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1170 {
1171 int count;
1172 struct urb *curr_urb;
1173
1174 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1175 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1176 count = put_rxbuf_data(curr_urb, serial);
1177 if (count == -1)
1178 return;
1179 if (count == 0) {
1180 serial->curr_rx_urb_idx++;
1181 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1182 serial->curr_rx_urb_idx = 0;
1183 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1184 }
1185 }
1186 }
1187
1188 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1189 {
1190 int count = 0;
1191 struct urb *urb;
1192
1193 urb = serial->rx_urb[0];
1194 if (serial->open_count > 0) {
1195 count = put_rxbuf_data(urb, serial);
1196 if (count == -1)
1197 return;
1198 }
1199 /* Re issue a read as long as we receive data. */
1200
1201 if (count == 0 && ((urb->actual_length != 0) ||
1202 (serial->rx_state == RX_PENDING))) {
1203 serial->rx_state = RX_SENT;
1204 hso_mux_serial_read(serial);
1205 } else
1206 serial->rx_state = RX_IDLE;
1207 }
1208
1209
1210 /* read callback for Diag and CS port */
1211 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1212 {
1213 struct hso_serial *serial = urb->context;
1214 int status = urb->status;
1215
1216 /* sanity check */
1217 if (!serial) {
1218 D1("serial == NULL");
1219 return;
1220 } else if (status) {
1221 handle_usb_error(status, __func__, serial->parent);
1222 return;
1223 }
1224
1225 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1226 D1("Actual length = %d\n", urb->actual_length);
1227 DUMP1(urb->transfer_buffer, urb->actual_length);
1228
1229 /* Anyone listening? */
1230 if (serial->open_count == 0)
1231 return;
1232
1233 if (status == 0) {
1234 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1235 u32 rest;
1236 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1237 rest =
1238 urb->actual_length %
1239 le16_to_cpu(serial->in_endp->wMaxPacketSize);
1240 if (((rest == 5) || (rest == 6)) &&
1241 !memcmp(((u8 *) urb->transfer_buffer) +
1242 urb->actual_length - 4, crc_check, 4)) {
1243 urb->actual_length -= 4;
1244 }
1245 }
1246 /* Valid data, handle RX data */
1247 spin_lock(&serial->serial_lock);
1248 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1249 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1250 spin_unlock(&serial->serial_lock);
1251 } else if (status == -ENOENT || status == -ECONNRESET) {
1252 /* Unlinked - check for throttled port. */
1253 D2("Port %d, successfully unlinked urb", serial->minor);
1254 spin_lock(&serial->serial_lock);
1255 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1256 hso_resubmit_rx_bulk_urb(serial, urb);
1257 spin_unlock(&serial->serial_lock);
1258 } else {
1259 D2("Port %d, status = %d for read urb", serial->minor, status);
1260 return;
1261 }
1262 }
1263
1264 /*
1265 * This needs to be a tasklet otherwise we will
1266 * end up recursively calling this function.
1267 */
1268 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1269 {
1270 unsigned long flags;
1271
1272 spin_lock_irqsave(&serial->serial_lock, flags);
1273 if ((serial->parent->port_spec & HSO_INTF_MUX))
1274 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1275 else
1276 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1277 spin_unlock_irqrestore(&serial->serial_lock, flags);
1278 }
1279
1280 static void hso_unthrottle(struct tty_struct *tty)
1281 {
1282 struct hso_serial *serial = get_serial_by_tty(tty);
1283
1284 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1285 }
1286
1287 static void hso_unthrottle_workfunc(struct work_struct *work)
1288 {
1289 struct hso_serial *serial =
1290 container_of(work, struct hso_serial,
1291 retry_unthrottle_workqueue);
1292 hso_unthrottle_tasklet(serial);
1293 }
1294
1295 /* open the requested serial port */
1296 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1297 {
1298 struct hso_serial *serial = get_serial_by_index(tty->index);
1299 int result;
1300
1301 /* sanity check */
1302 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1303 WARN_ON(1);
1304 tty->driver_data = NULL;
1305 D1("Failed to open port");
1306 return -ENODEV;
1307 }
1308
1309 mutex_lock(&serial->parent->mutex);
1310 result = usb_autopm_get_interface(serial->parent->interface);
1311 if (result < 0)
1312 goto err_out;
1313
1314 D1("Opening %d", serial->minor);
1315 kref_get(&serial->parent->ref);
1316
1317 /* setup */
1318 spin_lock_irq(&serial->serial_lock);
1319 tty->driver_data = serial;
1320 tty_kref_put(serial->tty);
1321 serial->tty = tty_kref_get(tty);
1322 spin_unlock_irq(&serial->serial_lock);
1323
1324 /* check for port already opened, if not set the termios */
1325 serial->open_count++;
1326 if (serial->open_count == 1) {
1327 serial->rx_state = RX_IDLE;
1328 /* Force default termio settings */
1329 _hso_serial_set_termios(tty, NULL);
1330 tasklet_init(&serial->unthrottle_tasklet,
1331 (void (*)(unsigned long))hso_unthrottle_tasklet,
1332 (unsigned long)serial);
1333 INIT_WORK(&serial->retry_unthrottle_workqueue,
1334 hso_unthrottle_workfunc);
1335 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1336 if (result) {
1337 hso_stop_serial_device(serial->parent);
1338 serial->open_count--;
1339 kref_put(&serial->parent->ref, hso_serial_ref_free);
1340 }
1341 } else {
1342 D1("Port was already open");
1343 }
1344
1345 usb_autopm_put_interface(serial->parent->interface);
1346
1347 /* done */
1348 if (result)
1349 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1350 err_out:
1351 mutex_unlock(&serial->parent->mutex);
1352 return result;
1353 }
1354
1355 /* close the requested serial port */
1356 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1357 {
1358 struct hso_serial *serial = tty->driver_data;
1359 u8 usb_gone;
1360
1361 D1("Closing serial port");
1362
1363 /* Open failed, no close cleanup required */
1364 if (serial == NULL)
1365 return;
1366
1367 mutex_lock(&serial->parent->mutex);
1368 usb_gone = serial->parent->usb_gone;
1369
1370 if (!usb_gone)
1371 usb_autopm_get_interface(serial->parent->interface);
1372
1373 /* reset the rts and dtr */
1374 /* do the actual close */
1375 serial->open_count--;
1376
1377 if (serial->open_count <= 0) {
1378 serial->open_count = 0;
1379 spin_lock_irq(&serial->serial_lock);
1380 if (serial->tty == tty) {
1381 serial->tty->driver_data = NULL;
1382 serial->tty = NULL;
1383 tty_kref_put(tty);
1384 }
1385 spin_unlock_irq(&serial->serial_lock);
1386 if (!usb_gone)
1387 hso_stop_serial_device(serial->parent);
1388 tasklet_kill(&serial->unthrottle_tasklet);
1389 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1390 }
1391
1392 if (!usb_gone)
1393 usb_autopm_put_interface(serial->parent->interface);
1394
1395 mutex_unlock(&serial->parent->mutex);
1396
1397 kref_put(&serial->parent->ref, hso_serial_ref_free);
1398 }
1399
1400 /* close the requested serial port */
1401 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1402 int count)
1403 {
1404 struct hso_serial *serial = get_serial_by_tty(tty);
1405 int space, tx_bytes;
1406 unsigned long flags;
1407
1408 /* sanity check */
1409 if (serial == NULL) {
1410 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1411 return -ENODEV;
1412 }
1413
1414 spin_lock_irqsave(&serial->serial_lock, flags);
1415
1416 space = serial->tx_data_length - serial->tx_buffer_count;
1417 tx_bytes = (count < space) ? count : space;
1418
1419 if (!tx_bytes)
1420 goto out;
1421
1422 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1423 serial->tx_buffer_count += tx_bytes;
1424
1425 out:
1426 spin_unlock_irqrestore(&serial->serial_lock, flags);
1427
1428 hso_kick_transmit(serial);
1429 /* done */
1430 return tx_bytes;
1431 }
1432
1433 /* how much room is there for writing */
1434 static int hso_serial_write_room(struct tty_struct *tty)
1435 {
1436 struct hso_serial *serial = get_serial_by_tty(tty);
1437 int room;
1438 unsigned long flags;
1439
1440 spin_lock_irqsave(&serial->serial_lock, flags);
1441 room = serial->tx_data_length - serial->tx_buffer_count;
1442 spin_unlock_irqrestore(&serial->serial_lock, flags);
1443
1444 /* return free room */
1445 return room;
1446 }
1447
1448 /* setup the term */
1449 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1450 {
1451 struct hso_serial *serial = get_serial_by_tty(tty);
1452 unsigned long flags;
1453
1454 if (old)
1455 D5("Termios called with: cflags new[%d] - old[%d]",
1456 tty->termios->c_cflag, old->c_cflag);
1457
1458 /* the actual setup */
1459 spin_lock_irqsave(&serial->serial_lock, flags);
1460 if (serial->open_count)
1461 _hso_serial_set_termios(tty, old);
1462 else
1463 tty->termios = old;
1464 spin_unlock_irqrestore(&serial->serial_lock, flags);
1465
1466 /* done */
1467 }
1468
1469 /* how many characters in the buffer */
1470 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1471 {
1472 struct hso_serial *serial = get_serial_by_tty(tty);
1473 int chars;
1474 unsigned long flags;
1475
1476 /* sanity check */
1477 if (serial == NULL)
1478 return 0;
1479
1480 spin_lock_irqsave(&serial->serial_lock, flags);
1481 chars = serial->tx_buffer_count;
1482 spin_unlock_irqrestore(&serial->serial_lock, flags);
1483
1484 return chars;
1485 }
1486 static int tiocmget_submit_urb(struct hso_serial *serial,
1487 struct hso_tiocmget *tiocmget,
1488 struct usb_device *usb)
1489 {
1490 int result;
1491
1492 if (serial->parent->usb_gone)
1493 return -ENODEV;
1494 usb_fill_int_urb(tiocmget->urb, usb,
1495 usb_rcvintpipe(usb,
1496 tiocmget->endp->
1497 bEndpointAddress & 0x7F),
1498 &tiocmget->serial_state_notification,
1499 sizeof(struct hso_serial_state_notification),
1500 tiocmget_intr_callback, serial,
1501 tiocmget->endp->bInterval);
1502 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1503 if (result) {
1504 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1505 result);
1506 }
1507 return result;
1508
1509 }
1510
1511 static void tiocmget_intr_callback(struct urb *urb)
1512 {
1513 struct hso_serial *serial = urb->context;
1514 struct hso_tiocmget *tiocmget;
1515 int status = urb->status;
1516 u16 UART_state_bitmap, prev_UART_state_bitmap;
1517 struct uart_icount *icount;
1518 struct hso_serial_state_notification *serial_state_notification;
1519 struct usb_device *usb;
1520
1521 /* Sanity checks */
1522 if (!serial)
1523 return;
1524 if (status) {
1525 handle_usb_error(status, __func__, serial->parent);
1526 return;
1527 }
1528 tiocmget = serial->tiocmget;
1529 if (!tiocmget)
1530 return;
1531 usb = serial->parent->usb;
1532 serial_state_notification = &tiocmget->serial_state_notification;
1533 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1534 serial_state_notification->bNotification != B_NOTIFICATION ||
1535 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1536 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1537 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1538 dev_warn(&usb->dev,
1539 "hso received invalid serial state notification\n");
1540 DUMP(serial_state_notification,
1541 sizeof(struct hso_serial_state_notification));
1542 } else {
1543
1544 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1545 UART_state_bitmap);
1546 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1547 icount = &tiocmget->icount;
1548 spin_lock(&serial->serial_lock);
1549 if ((UART_state_bitmap & B_OVERRUN) !=
1550 (prev_UART_state_bitmap & B_OVERRUN))
1551 icount->parity++;
1552 if ((UART_state_bitmap & B_PARITY) !=
1553 (prev_UART_state_bitmap & B_PARITY))
1554 icount->parity++;
1555 if ((UART_state_bitmap & B_FRAMING) !=
1556 (prev_UART_state_bitmap & B_FRAMING))
1557 icount->frame++;
1558 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1559 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1560 icount->rng++;
1561 if ((UART_state_bitmap & B_BREAK) !=
1562 (prev_UART_state_bitmap & B_BREAK))
1563 icount->brk++;
1564 if ((UART_state_bitmap & B_TX_CARRIER) !=
1565 (prev_UART_state_bitmap & B_TX_CARRIER))
1566 icount->dsr++;
1567 if ((UART_state_bitmap & B_RX_CARRIER) !=
1568 (prev_UART_state_bitmap & B_RX_CARRIER))
1569 icount->dcd++;
1570 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1571 spin_unlock(&serial->serial_lock);
1572 tiocmget->intr_completed = 1;
1573 wake_up_interruptible(&tiocmget->waitq);
1574 }
1575 memset(serial_state_notification, 0,
1576 sizeof(struct hso_serial_state_notification));
1577 tiocmget_submit_urb(serial,
1578 tiocmget,
1579 serial->parent->usb);
1580 }
1581
1582 /*
1583 * next few functions largely stolen from drivers/serial/serial_core.c
1584 */
1585 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1586 * - mask passed in arg for lines of interest
1587 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1588 * Caller should use TIOCGICOUNT to see which one it was
1589 */
1590 static int
1591 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1592 {
1593 DECLARE_WAITQUEUE(wait, current);
1594 struct uart_icount cprev, cnow;
1595 struct hso_tiocmget *tiocmget;
1596 int ret;
1597
1598 tiocmget = serial->tiocmget;
1599 if (!tiocmget)
1600 return -ENOENT;
1601 /*
1602 * note the counters on entry
1603 */
1604 spin_lock_irq(&serial->serial_lock);
1605 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1606 spin_unlock_irq(&serial->serial_lock);
1607 add_wait_queue(&tiocmget->waitq, &wait);
1608 for (;;) {
1609 spin_lock_irq(&serial->serial_lock);
1610 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1611 spin_unlock_irq(&serial->serial_lock);
1612 set_current_state(TASK_INTERRUPTIBLE);
1613 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1614 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1615 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1616 ret = 0;
1617 break;
1618 }
1619 schedule();
1620 /* see if a signal did it */
1621 if (signal_pending(current)) {
1622 ret = -ERESTARTSYS;
1623 break;
1624 }
1625 cprev = cnow;
1626 }
1627 current->state = TASK_RUNNING;
1628 remove_wait_queue(&tiocmget->waitq, &wait);
1629
1630 return ret;
1631 }
1632
1633 /*
1634 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1635 * Return: write counters to the user passed counter struct
1636 * NB: both 1->0 and 0->1 transitions are counted except for
1637 * RI where only 0->1 is counted.
1638 */
1639 static int hso_get_count(struct tty_struct *tty,
1640 struct serial_icounter_struct *icount)
1641 {
1642 struct uart_icount cnow;
1643 struct hso_serial *serial = get_serial_by_tty(tty);
1644 struct hso_tiocmget *tiocmget = serial->tiocmget;
1645
1646 memset(&icount, 0, sizeof(struct serial_icounter_struct));
1647
1648 if (!tiocmget)
1649 return -ENOENT;
1650 spin_lock_irq(&serial->serial_lock);
1651 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1652 spin_unlock_irq(&serial->serial_lock);
1653
1654 icount->cts = cnow.cts;
1655 icount->dsr = cnow.dsr;
1656 icount->rng = cnow.rng;
1657 icount->dcd = cnow.dcd;
1658 icount->rx = cnow.rx;
1659 icount->tx = cnow.tx;
1660 icount->frame = cnow.frame;
1661 icount->overrun = cnow.overrun;
1662 icount->parity = cnow.parity;
1663 icount->brk = cnow.brk;
1664 icount->buf_overrun = cnow.buf_overrun;
1665
1666 return 0;
1667 }
1668
1669
1670 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1671 {
1672 int retval;
1673 struct hso_serial *serial = get_serial_by_tty(tty);
1674 struct hso_tiocmget *tiocmget;
1675 u16 UART_state_bitmap;
1676
1677 /* sanity check */
1678 if (!serial) {
1679 D1("no tty structures");
1680 return -EINVAL;
1681 }
1682 spin_lock_irq(&serial->serial_lock);
1683 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1684 ((serial->dtr_state) ? TIOCM_DTR : 0);
1685 tiocmget = serial->tiocmget;
1686 if (tiocmget) {
1687
1688 UART_state_bitmap = le16_to_cpu(
1689 tiocmget->prev_UART_state_bitmap);
1690 if (UART_state_bitmap & B_RING_SIGNAL)
1691 retval |= TIOCM_RNG;
1692 if (UART_state_bitmap & B_RX_CARRIER)
1693 retval |= TIOCM_CD;
1694 if (UART_state_bitmap & B_TX_CARRIER)
1695 retval |= TIOCM_DSR;
1696 }
1697 spin_unlock_irq(&serial->serial_lock);
1698 return retval;
1699 }
1700
1701 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1702 unsigned int set, unsigned int clear)
1703 {
1704 int val = 0;
1705 unsigned long flags;
1706 int if_num;
1707 struct hso_serial *serial = get_serial_by_tty(tty);
1708
1709 /* sanity check */
1710 if (!serial) {
1711 D1("no tty structures");
1712 return -EINVAL;
1713 }
1714
1715 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1716 return -EINVAL;
1717
1718 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1719
1720 spin_lock_irqsave(&serial->serial_lock, flags);
1721 if (set & TIOCM_RTS)
1722 serial->rts_state = 1;
1723 if (set & TIOCM_DTR)
1724 serial->dtr_state = 1;
1725
1726 if (clear & TIOCM_RTS)
1727 serial->rts_state = 0;
1728 if (clear & TIOCM_DTR)
1729 serial->dtr_state = 0;
1730
1731 if (serial->dtr_state)
1732 val |= 0x01;
1733 if (serial->rts_state)
1734 val |= 0x02;
1735
1736 spin_unlock_irqrestore(&serial->serial_lock, flags);
1737
1738 return usb_control_msg(serial->parent->usb,
1739 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1740 0x21, val, if_num, NULL, 0,
1741 USB_CTRL_SET_TIMEOUT);
1742 }
1743
1744 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1745 unsigned int cmd, unsigned long arg)
1746 {
1747 struct hso_serial *serial = get_serial_by_tty(tty);
1748 int ret = 0;
1749 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1750
1751 if (!serial)
1752 return -ENODEV;
1753 switch (cmd) {
1754 case TIOCMIWAIT:
1755 ret = hso_wait_modem_status(serial, arg);
1756 break;
1757 default:
1758 ret = -ENOIOCTLCMD;
1759 break;
1760 }
1761 return ret;
1762 }
1763
1764
1765 /* starts a transmit */
1766 static void hso_kick_transmit(struct hso_serial *serial)
1767 {
1768 u8 *temp;
1769 unsigned long flags;
1770 int res;
1771
1772 spin_lock_irqsave(&serial->serial_lock, flags);
1773 if (!serial->tx_buffer_count)
1774 goto out;
1775
1776 if (serial->tx_urb_used)
1777 goto out;
1778
1779 /* Wakeup USB interface if necessary */
1780 if (hso_get_activity(serial->parent) == -EAGAIN)
1781 goto out;
1782
1783 /* Switch pointers around to avoid memcpy */
1784 temp = serial->tx_buffer;
1785 serial->tx_buffer = serial->tx_data;
1786 serial->tx_data = temp;
1787 serial->tx_data_count = serial->tx_buffer_count;
1788 serial->tx_buffer_count = 0;
1789
1790 /* If temp is set, it means we switched buffers */
1791 if (temp && serial->write_data) {
1792 res = serial->write_data(serial);
1793 if (res >= 0)
1794 serial->tx_urb_used = 1;
1795 }
1796 out:
1797 spin_unlock_irqrestore(&serial->serial_lock, flags);
1798 }
1799
1800 /* make a request (for reading and writing data to muxed serial port) */
1801 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1802 struct urb *ctrl_urb,
1803 struct usb_ctrlrequest *ctrl_req,
1804 u8 *ctrl_urb_data, u32 size)
1805 {
1806 int result;
1807 int pipe;
1808
1809 /* Sanity check */
1810 if (!serial || !ctrl_urb || !ctrl_req) {
1811 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1812 return -EINVAL;
1813 }
1814
1815 /* initialize */
1816 ctrl_req->wValue = 0;
1817 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1818 ctrl_req->wLength = cpu_to_le16(size);
1819
1820 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1821 /* Reading command */
1822 ctrl_req->bRequestType = USB_DIR_IN |
1823 USB_TYPE_OPTION_VENDOR |
1824 USB_RECIP_INTERFACE;
1825 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1826 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1827 } else {
1828 /* Writing command */
1829 ctrl_req->bRequestType = USB_DIR_OUT |
1830 USB_TYPE_OPTION_VENDOR |
1831 USB_RECIP_INTERFACE;
1832 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1833 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1834 }
1835 /* syslog */
1836 D2("%s command (%02x) len: %d, port: %d",
1837 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1838 ctrl_req->bRequestType, ctrl_req->wLength, port);
1839
1840 /* Load ctrl urb */
1841 ctrl_urb->transfer_flags = 0;
1842 usb_fill_control_urb(ctrl_urb,
1843 serial->parent->usb,
1844 pipe,
1845 (u8 *) ctrl_req,
1846 ctrl_urb_data, size, ctrl_callback, serial);
1847 /* Send it on merry way */
1848 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1849 if (result) {
1850 dev_err(&ctrl_urb->dev->dev,
1851 "%s failed submit ctrl_urb %d type %d\n", __func__,
1852 result, type);
1853 return result;
1854 }
1855
1856 /* done */
1857 return size;
1858 }
1859
1860 /* called by intr_callback when read occurs */
1861 static int hso_mux_serial_read(struct hso_serial *serial)
1862 {
1863 if (!serial)
1864 return -EINVAL;
1865
1866 /* clean data */
1867 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1868 /* make the request */
1869
1870 if (serial->num_rx_urbs != 1) {
1871 dev_err(&serial->parent->interface->dev,
1872 "ERROR: mux'd reads with multiple buffers "
1873 "not possible\n");
1874 return 0;
1875 }
1876 return mux_device_request(serial,
1877 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1878 serial->parent->port_spec & HSO_PORT_MASK,
1879 serial->rx_urb[0],
1880 &serial->ctrl_req_rx,
1881 serial->rx_data[0], serial->rx_data_length);
1882 }
1883
1884 /* used for muxed serial port callback (muxed serial read) */
1885 static void intr_callback(struct urb *urb)
1886 {
1887 struct hso_shared_int *shared_int = urb->context;
1888 struct hso_serial *serial;
1889 unsigned char *port_req;
1890 int status = urb->status;
1891 int i;
1892
1893 usb_mark_last_busy(urb->dev);
1894
1895 /* sanity check */
1896 if (!shared_int)
1897 return;
1898
1899 /* status check */
1900 if (status) {
1901 handle_usb_error(status, __func__, NULL);
1902 return;
1903 }
1904 D4("\n--- Got intr callback 0x%02X ---", status);
1905
1906 /* what request? */
1907 port_req = urb->transfer_buffer;
1908 D4(" port_req = 0x%.2X\n", *port_req);
1909 /* loop over all muxed ports to find the one sending this */
1910 for (i = 0; i < 8; i++) {
1911 /* max 8 channels on MUX */
1912 if (*port_req & (1 << i)) {
1913 serial = get_serial_by_shared_int_and_type(shared_int,
1914 (1 << i));
1915 if (serial != NULL) {
1916 D1("Pending read interrupt on port %d\n", i);
1917 spin_lock(&serial->serial_lock);
1918 if (serial->rx_state == RX_IDLE &&
1919 serial->open_count > 0) {
1920 /* Setup and send a ctrl req read on
1921 * port i */
1922 if (!serial->rx_urb_filled[0]) {
1923 serial->rx_state = RX_SENT;
1924 hso_mux_serial_read(serial);
1925 } else
1926 serial->rx_state = RX_PENDING;
1927 } else {
1928 D1("Already a read pending on "
1929 "port %d or port not open\n", i);
1930 }
1931 spin_unlock(&serial->serial_lock);
1932 }
1933 }
1934 }
1935 /* Resubmit interrupt urb */
1936 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1937 }
1938
1939 /* called for writing to muxed serial port */
1940 static int hso_mux_serial_write_data(struct hso_serial *serial)
1941 {
1942 if (NULL == serial)
1943 return -EINVAL;
1944
1945 return mux_device_request(serial,
1946 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1947 serial->parent->port_spec & HSO_PORT_MASK,
1948 serial->tx_urb,
1949 &serial->ctrl_req_tx,
1950 serial->tx_data, serial->tx_data_count);
1951 }
1952
1953 /* write callback for Diag and CS port */
1954 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1955 {
1956 struct hso_serial *serial = urb->context;
1957 int status = urb->status;
1958 struct tty_struct *tty;
1959
1960 /* sanity check */
1961 if (!serial) {
1962 D1("serial == NULL");
1963 return;
1964 }
1965
1966 spin_lock(&serial->serial_lock);
1967 serial->tx_urb_used = 0;
1968 tty = tty_kref_get(serial->tty);
1969 spin_unlock(&serial->serial_lock);
1970 if (status) {
1971 handle_usb_error(status, __func__, serial->parent);
1972 tty_kref_put(tty);
1973 return;
1974 }
1975 hso_put_activity(serial->parent);
1976 if (tty) {
1977 tty_wakeup(tty);
1978 tty_kref_put(tty);
1979 }
1980 hso_kick_transmit(serial);
1981
1982 D1(" ");
1983 }
1984
1985 /* called for writing diag or CS serial port */
1986 static int hso_std_serial_write_data(struct hso_serial *serial)
1987 {
1988 int count = serial->tx_data_count;
1989 int result;
1990
1991 usb_fill_bulk_urb(serial->tx_urb,
1992 serial->parent->usb,
1993 usb_sndbulkpipe(serial->parent->usb,
1994 serial->out_endp->
1995 bEndpointAddress & 0x7F),
1996 serial->tx_data, serial->tx_data_count,
1997 hso_std_serial_write_bulk_callback, serial);
1998
1999 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
2000 if (result) {
2001 dev_warn(&serial->parent->usb->dev,
2002 "Failed to submit urb - res %d\n", result);
2003 return result;
2004 }
2005
2006 return count;
2007 }
2008
2009 /* callback after read or write on muxed serial port */
2010 static void ctrl_callback(struct urb *urb)
2011 {
2012 struct hso_serial *serial = urb->context;
2013 struct usb_ctrlrequest *req;
2014 int status = urb->status;
2015 struct tty_struct *tty;
2016
2017 /* sanity check */
2018 if (!serial)
2019 return;
2020
2021 spin_lock(&serial->serial_lock);
2022 serial->tx_urb_used = 0;
2023 tty = tty_kref_get(serial->tty);
2024 spin_unlock(&serial->serial_lock);
2025 if (status) {
2026 handle_usb_error(status, __func__, serial->parent);
2027 tty_kref_put(tty);
2028 return;
2029 }
2030
2031 /* what request? */
2032 req = (struct usb_ctrlrequest *)(urb->setup_packet);
2033 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2034 D4("Actual length of urb = %d\n", urb->actual_length);
2035 DUMP1(urb->transfer_buffer, urb->actual_length);
2036
2037 if (req->bRequestType ==
2038 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2039 /* response to a read command */
2040 serial->rx_urb_filled[0] = 1;
2041 spin_lock(&serial->serial_lock);
2042 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2043 spin_unlock(&serial->serial_lock);
2044 } else {
2045 hso_put_activity(serial->parent);
2046 if (tty)
2047 tty_wakeup(tty);
2048 /* response to a write command */
2049 hso_kick_transmit(serial);
2050 }
2051 tty_kref_put(tty);
2052 }
2053
2054 /* handle RX data for serial port */
2055 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2056 {
2057 struct tty_struct *tty;
2058 int write_length_remaining = 0;
2059 int curr_write_len;
2060
2061 /* Sanity check */
2062 if (urb == NULL || serial == NULL) {
2063 D1("serial = NULL");
2064 return -2;
2065 }
2066
2067 /* All callers to put_rxbuf_data hold serial_lock */
2068 tty = tty_kref_get(serial->tty);
2069
2070 /* Push data to tty */
2071 if (tty) {
2072 write_length_remaining = urb->actual_length -
2073 serial->curr_rx_urb_offset;
2074 D1("data to push to tty");
2075 while (write_length_remaining) {
2076 if (test_bit(TTY_THROTTLED, &tty->flags)) {
2077 tty_kref_put(tty);
2078 return -1;
2079 }
2080 curr_write_len = tty_insert_flip_string
2081 (tty, urb->transfer_buffer +
2082 serial->curr_rx_urb_offset,
2083 write_length_remaining);
2084 serial->curr_rx_urb_offset += curr_write_len;
2085 write_length_remaining -= curr_write_len;
2086 tty_flip_buffer_push(tty);
2087 }
2088 }
2089 if (write_length_remaining == 0) {
2090 serial->curr_rx_urb_offset = 0;
2091 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2092 }
2093 tty_kref_put(tty);
2094 return write_length_remaining;
2095 }
2096
2097
2098 /* Base driver functions */
2099
2100 static void hso_log_port(struct hso_device *hso_dev)
2101 {
2102 char *port_type;
2103 char port_dev[20];
2104
2105 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2106 case HSO_PORT_CONTROL:
2107 port_type = "Control";
2108 break;
2109 case HSO_PORT_APP:
2110 port_type = "Application";
2111 break;
2112 case HSO_PORT_GPS:
2113 port_type = "GPS";
2114 break;
2115 case HSO_PORT_GPS_CONTROL:
2116 port_type = "GPS control";
2117 break;
2118 case HSO_PORT_APP2:
2119 port_type = "Application2";
2120 break;
2121 case HSO_PORT_PCSC:
2122 port_type = "PCSC";
2123 break;
2124 case HSO_PORT_DIAG:
2125 port_type = "Diagnostic";
2126 break;
2127 case HSO_PORT_DIAG2:
2128 port_type = "Diagnostic2";
2129 break;
2130 case HSO_PORT_MODEM:
2131 port_type = "Modem";
2132 break;
2133 case HSO_PORT_NETWORK:
2134 port_type = "Network";
2135 break;
2136 default:
2137 port_type = "Unknown";
2138 break;
2139 }
2140 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2141 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2142 } else
2143 sprintf(port_dev, "/dev/%s%d", tty_filename,
2144 dev2ser(hso_dev)->minor);
2145
2146 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2147 port_type, port_dev);
2148 }
2149
2150 static int hso_start_net_device(struct hso_device *hso_dev)
2151 {
2152 int i, result = 0;
2153 struct hso_net *hso_net = dev2net(hso_dev);
2154
2155 if (!hso_net)
2156 return -ENODEV;
2157
2158 /* send URBs for all read buffers */
2159 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2160
2161 /* Prep a receive URB */
2162 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2163 hso_dev->usb,
2164 usb_rcvbulkpipe(hso_dev->usb,
2165 hso_net->in_endp->
2166 bEndpointAddress & 0x7F),
2167 hso_net->mux_bulk_rx_buf_pool[i],
2168 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2169 hso_net);
2170
2171 /* Put it out there so the device can send us stuff */
2172 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2173 GFP_NOIO);
2174 if (result)
2175 dev_warn(&hso_dev->usb->dev,
2176 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2177 i, result);
2178 }
2179
2180 return result;
2181 }
2182
2183 static int hso_stop_net_device(struct hso_device *hso_dev)
2184 {
2185 int i;
2186 struct hso_net *hso_net = dev2net(hso_dev);
2187
2188 if (!hso_net)
2189 return -ENODEV;
2190
2191 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2192 if (hso_net->mux_bulk_rx_urb_pool[i])
2193 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2194
2195 }
2196 if (hso_net->mux_bulk_tx_urb)
2197 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2198
2199 return 0;
2200 }
2201
2202 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2203 {
2204 int i, result = 0;
2205 struct hso_serial *serial = dev2ser(hso_dev);
2206
2207 if (!serial)
2208 return -ENODEV;
2209
2210 /* If it is not the MUX port fill in and submit a bulk urb (already
2211 * allocated in hso_serial_start) */
2212 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2213 for (i = 0; i < serial->num_rx_urbs; i++) {
2214 usb_fill_bulk_urb(serial->rx_urb[i],
2215 serial->parent->usb,
2216 usb_rcvbulkpipe(serial->parent->usb,
2217 serial->in_endp->
2218 bEndpointAddress &
2219 0x7F),
2220 serial->rx_data[i],
2221 serial->rx_data_length,
2222 hso_std_serial_read_bulk_callback,
2223 serial);
2224 result = usb_submit_urb(serial->rx_urb[i], flags);
2225 if (result) {
2226 dev_warn(&serial->parent->usb->dev,
2227 "Failed to submit urb - res %d\n",
2228 result);
2229 break;
2230 }
2231 }
2232 } else {
2233 mutex_lock(&serial->shared_int->shared_int_lock);
2234 if (!serial->shared_int->use_count) {
2235 result =
2236 hso_mux_submit_intr_urb(serial->shared_int,
2237 hso_dev->usb, flags);
2238 }
2239 serial->shared_int->use_count++;
2240 mutex_unlock(&serial->shared_int->shared_int_lock);
2241 }
2242 if (serial->tiocmget)
2243 tiocmget_submit_urb(serial,
2244 serial->tiocmget,
2245 serial->parent->usb);
2246 return result;
2247 }
2248
2249 static int hso_stop_serial_device(struct hso_device *hso_dev)
2250 {
2251 int i;
2252 struct hso_serial *serial = dev2ser(hso_dev);
2253 struct hso_tiocmget *tiocmget;
2254
2255 if (!serial)
2256 return -ENODEV;
2257
2258 for (i = 0; i < serial->num_rx_urbs; i++) {
2259 if (serial->rx_urb[i]) {
2260 usb_kill_urb(serial->rx_urb[i]);
2261 serial->rx_urb_filled[i] = 0;
2262 }
2263 }
2264 serial->curr_rx_urb_idx = 0;
2265 serial->curr_rx_urb_offset = 0;
2266
2267 if (serial->tx_urb)
2268 usb_kill_urb(serial->tx_urb);
2269
2270 if (serial->shared_int) {
2271 mutex_lock(&serial->shared_int->shared_int_lock);
2272 if (serial->shared_int->use_count &&
2273 (--serial->shared_int->use_count == 0)) {
2274 struct urb *urb;
2275
2276 urb = serial->shared_int->shared_intr_urb;
2277 if (urb)
2278 usb_kill_urb(urb);
2279 }
2280 mutex_unlock(&serial->shared_int->shared_int_lock);
2281 }
2282 tiocmget = serial->tiocmget;
2283 if (tiocmget) {
2284 wake_up_interruptible(&tiocmget->waitq);
2285 usb_kill_urb(tiocmget->urb);
2286 }
2287
2288 return 0;
2289 }
2290
2291 static void hso_serial_common_free(struct hso_serial *serial)
2292 {
2293 int i;
2294
2295 if (serial->parent->dev)
2296 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2297
2298 tty_unregister_device(tty_drv, serial->minor);
2299
2300 for (i = 0; i < serial->num_rx_urbs; i++) {
2301 /* unlink and free RX URB */
2302 usb_free_urb(serial->rx_urb[i]);
2303 /* free the RX buffer */
2304 kfree(serial->rx_data[i]);
2305 }
2306
2307 /* unlink and free TX URB */
2308 usb_free_urb(serial->tx_urb);
2309 kfree(serial->tx_data);
2310 }
2311
2312 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2313 int rx_size, int tx_size)
2314 {
2315 struct device *dev;
2316 int minor;
2317 int i;
2318
2319 minor = get_free_serial_index();
2320 if (minor < 0)
2321 goto exit;
2322
2323 /* register our minor number */
2324 serial->parent->dev = tty_register_device(tty_drv, minor,
2325 &serial->parent->interface->dev);
2326 dev = serial->parent->dev;
2327 dev_set_drvdata(dev, serial->parent);
2328 i = device_create_file(dev, &dev_attr_hsotype);
2329
2330 /* fill in specific data for later use */
2331 serial->minor = minor;
2332 serial->magic = HSO_SERIAL_MAGIC;
2333 spin_lock_init(&serial->serial_lock);
2334 serial->num_rx_urbs = num_urbs;
2335
2336 /* RX, allocate urb and initialize */
2337
2338 /* prepare our RX buffer */
2339 serial->rx_data_length = rx_size;
2340 for (i = 0; i < serial->num_rx_urbs; i++) {
2341 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2342 if (!serial->rx_urb[i]) {
2343 dev_err(dev, "Could not allocate urb?\n");
2344 goto exit;
2345 }
2346 serial->rx_urb[i]->transfer_buffer = NULL;
2347 serial->rx_urb[i]->transfer_buffer_length = 0;
2348 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2349 GFP_KERNEL);
2350 if (!serial->rx_data[i]) {
2351 dev_err(dev, "%s - Out of memory\n", __func__);
2352 goto exit;
2353 }
2354 }
2355
2356 /* TX, allocate urb and initialize */
2357 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2358 if (!serial->tx_urb) {
2359 dev_err(dev, "Could not allocate urb?\n");
2360 goto exit;
2361 }
2362 serial->tx_urb->transfer_buffer = NULL;
2363 serial->tx_urb->transfer_buffer_length = 0;
2364 /* prepare our TX buffer */
2365 serial->tx_data_count = 0;
2366 serial->tx_buffer_count = 0;
2367 serial->tx_data_length = tx_size;
2368 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2369 if (!serial->tx_data) {
2370 dev_err(dev, "%s - Out of memory\n", __func__);
2371 goto exit;
2372 }
2373 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2374 if (!serial->tx_buffer) {
2375 dev_err(dev, "%s - Out of memory\n", __func__);
2376 goto exit;
2377 }
2378
2379 return 0;
2380 exit:
2381 hso_serial_common_free(serial);
2382 return -1;
2383 }
2384
2385 /* Creates a general hso device */
2386 static struct hso_device *hso_create_device(struct usb_interface *intf,
2387 int port_spec)
2388 {
2389 struct hso_device *hso_dev;
2390
2391 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2392 if (!hso_dev)
2393 return NULL;
2394
2395 hso_dev->port_spec = port_spec;
2396 hso_dev->usb = interface_to_usbdev(intf);
2397 hso_dev->interface = intf;
2398 kref_init(&hso_dev->ref);
2399 mutex_init(&hso_dev->mutex);
2400
2401 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2402 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2403 INIT_WORK(&hso_dev->reset_device, reset_device);
2404
2405 return hso_dev;
2406 }
2407
2408 /* Removes a network device in the network device table */
2409 static int remove_net_device(struct hso_device *hso_dev)
2410 {
2411 int i;
2412
2413 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2414 if (network_table[i] == hso_dev) {
2415 network_table[i] = NULL;
2416 break;
2417 }
2418 }
2419 if (i == HSO_MAX_NET_DEVICES)
2420 return -1;
2421 return 0;
2422 }
2423
2424 /* Frees our network device */
2425 static void hso_free_net_device(struct hso_device *hso_dev)
2426 {
2427 int i;
2428 struct hso_net *hso_net = dev2net(hso_dev);
2429
2430 if (!hso_net)
2431 return;
2432
2433 remove_net_device(hso_net->parent);
2434
2435 if (hso_net->net) {
2436 unregister_netdev(hso_net->net);
2437 free_netdev(hso_net->net);
2438 }
2439
2440 /* start freeing */
2441 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2442 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2443 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2444 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2445 }
2446 usb_free_urb(hso_net->mux_bulk_tx_urb);
2447 kfree(hso_net->mux_bulk_tx_buf);
2448 hso_net->mux_bulk_tx_buf = NULL;
2449
2450 kfree(hso_dev);
2451 }
2452
2453 static const struct net_device_ops hso_netdev_ops = {
2454 .ndo_open = hso_net_open,
2455 .ndo_stop = hso_net_close,
2456 .ndo_start_xmit = hso_net_start_xmit,
2457 .ndo_tx_timeout = hso_net_tx_timeout,
2458 };
2459
2460 /* initialize the network interface */
2461 static void hso_net_init(struct net_device *net)
2462 {
2463 struct hso_net *hso_net = netdev_priv(net);
2464
2465 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2466
2467 /* fill in the other fields */
2468 net->netdev_ops = &hso_netdev_ops;
2469 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2470 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2471 net->type = ARPHRD_NONE;
2472 net->mtu = DEFAULT_MTU - 14;
2473 net->tx_queue_len = 10;
2474 SET_ETHTOOL_OPS(net, &ops);
2475
2476 /* and initialize the semaphore */
2477 spin_lock_init(&hso_net->net_lock);
2478 }
2479
2480 /* Adds a network device in the network device table */
2481 static int add_net_device(struct hso_device *hso_dev)
2482 {
2483 int i;
2484
2485 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2486 if (network_table[i] == NULL) {
2487 network_table[i] = hso_dev;
2488 break;
2489 }
2490 }
2491 if (i == HSO_MAX_NET_DEVICES)
2492 return -1;
2493 return 0;
2494 }
2495
2496 static int hso_rfkill_set_block(void *data, bool blocked)
2497 {
2498 struct hso_device *hso_dev = data;
2499 int enabled = !blocked;
2500 int rv;
2501
2502 mutex_lock(&hso_dev->mutex);
2503 if (hso_dev->usb_gone)
2504 rv = 0;
2505 else
2506 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2507 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2508 USB_CTRL_SET_TIMEOUT);
2509 mutex_unlock(&hso_dev->mutex);
2510 return rv;
2511 }
2512
2513 static const struct rfkill_ops hso_rfkill_ops = {
2514 .set_block = hso_rfkill_set_block,
2515 };
2516
2517 /* Creates and sets up everything for rfkill */
2518 static void hso_create_rfkill(struct hso_device *hso_dev,
2519 struct usb_interface *interface)
2520 {
2521 struct hso_net *hso_net = dev2net(hso_dev);
2522 struct device *dev = &hso_net->net->dev;
2523 char *rfkn;
2524
2525 rfkn = kzalloc(20, GFP_KERNEL);
2526 if (!rfkn)
2527 dev_err(dev, "%s - Out of memory\n", __func__);
2528
2529 snprintf(rfkn, 20, "hso-%d",
2530 interface->altsetting->desc.bInterfaceNumber);
2531
2532 hso_net->rfkill = rfkill_alloc(rfkn,
2533 &interface_to_usbdev(interface)->dev,
2534 RFKILL_TYPE_WWAN,
2535 &hso_rfkill_ops, hso_dev);
2536 if (!hso_net->rfkill) {
2537 dev_err(dev, "%s - Out of memory\n", __func__);
2538 kfree(rfkn);
2539 return;
2540 }
2541 if (rfkill_register(hso_net->rfkill) < 0) {
2542 rfkill_destroy(hso_net->rfkill);
2543 kfree(rfkn);
2544 hso_net->rfkill = NULL;
2545 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2546 return;
2547 }
2548 }
2549
2550 static struct device_type hso_type = {
2551 .name = "wwan",
2552 };
2553
2554 /* Creates our network device */
2555 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2556 int port_spec)
2557 {
2558 int result, i;
2559 struct net_device *net;
2560 struct hso_net *hso_net;
2561 struct hso_device *hso_dev;
2562
2563 hso_dev = hso_create_device(interface, port_spec);
2564 if (!hso_dev)
2565 return NULL;
2566
2567 /* allocate our network device, then we can put in our private data */
2568 /* call hso_net_init to do the basic initialization */
2569 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2570 if (!net) {
2571 dev_err(&interface->dev, "Unable to create ethernet device\n");
2572 goto exit;
2573 }
2574
2575 hso_net = netdev_priv(net);
2576
2577 hso_dev->port_data.dev_net = hso_net;
2578 hso_net->net = net;
2579 hso_net->parent = hso_dev;
2580
2581 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2582 USB_DIR_IN);
2583 if (!hso_net->in_endp) {
2584 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2585 goto exit;
2586 }
2587 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2588 USB_DIR_OUT);
2589 if (!hso_net->out_endp) {
2590 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2591 goto exit;
2592 }
2593 SET_NETDEV_DEV(net, &interface->dev);
2594 SET_NETDEV_DEVTYPE(net, &hso_type);
2595
2596 /* registering our net device */
2597 result = register_netdev(net);
2598 if (result) {
2599 dev_err(&interface->dev, "Failed to register device\n");
2600 goto exit;
2601 }
2602
2603 /* start allocating */
2604 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2605 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2606 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2607 dev_err(&interface->dev, "Could not allocate rx urb\n");
2608 goto exit;
2609 }
2610 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2611 GFP_KERNEL);
2612 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2613 dev_err(&interface->dev, "Could not allocate rx buf\n");
2614 goto exit;
2615 }
2616 }
2617 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2618 if (!hso_net->mux_bulk_tx_urb) {
2619 dev_err(&interface->dev, "Could not allocate tx urb\n");
2620 goto exit;
2621 }
2622 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2623 if (!hso_net->mux_bulk_tx_buf) {
2624 dev_err(&interface->dev, "Could not allocate tx buf\n");
2625 goto exit;
2626 }
2627
2628 add_net_device(hso_dev);
2629
2630 hso_log_port(hso_dev);
2631
2632 hso_create_rfkill(hso_dev, interface);
2633
2634 return hso_dev;
2635 exit:
2636 hso_free_net_device(hso_dev);
2637 return NULL;
2638 }
2639
2640 static void hso_free_tiomget(struct hso_serial *serial)
2641 {
2642 struct hso_tiocmget *tiocmget = serial->tiocmget;
2643 if (tiocmget) {
2644 if (tiocmget->urb) {
2645 usb_free_urb(tiocmget->urb);
2646 tiocmget->urb = NULL;
2647 }
2648 serial->tiocmget = NULL;
2649 kfree(tiocmget);
2650
2651 }
2652 }
2653
2654 /* Frees an AT channel ( goes for both mux and non-mux ) */
2655 static void hso_free_serial_device(struct hso_device *hso_dev)
2656 {
2657 struct hso_serial *serial = dev2ser(hso_dev);
2658
2659 if (!serial)
2660 return;
2661 set_serial_by_index(serial->minor, NULL);
2662
2663 hso_serial_common_free(serial);
2664
2665 if (serial->shared_int) {
2666 mutex_lock(&serial->shared_int->shared_int_lock);
2667 if (--serial->shared_int->ref_count == 0)
2668 hso_free_shared_int(serial->shared_int);
2669 else
2670 mutex_unlock(&serial->shared_int->shared_int_lock);
2671 }
2672 hso_free_tiomget(serial);
2673 kfree(serial);
2674 kfree(hso_dev);
2675 }
2676
2677 /* Creates a bulk AT channel */
2678 static struct hso_device *hso_create_bulk_serial_device(
2679 struct usb_interface *interface, int port)
2680 {
2681 struct hso_device *hso_dev;
2682 struct hso_serial *serial;
2683 int num_urbs;
2684 struct hso_tiocmget *tiocmget;
2685
2686 hso_dev = hso_create_device(interface, port);
2687 if (!hso_dev)
2688 return NULL;
2689
2690 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2691 if (!serial)
2692 goto exit;
2693
2694 serial->parent = hso_dev;
2695 hso_dev->port_data.dev_serial = serial;
2696
2697 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2698 num_urbs = 2;
2699 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2700 GFP_KERNEL);
2701 /* it isn't going to break our heart if serial->tiocmget
2702 * allocation fails don't bother checking this.
2703 */
2704 if (serial->tiocmget) {
2705 tiocmget = serial->tiocmget;
2706 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2707 if (tiocmget->urb) {
2708 mutex_init(&tiocmget->mutex);
2709 init_waitqueue_head(&tiocmget->waitq);
2710 tiocmget->endp = hso_get_ep(
2711 interface,
2712 USB_ENDPOINT_XFER_INT,
2713 USB_DIR_IN);
2714 } else
2715 hso_free_tiomget(serial);
2716 }
2717 }
2718 else
2719 num_urbs = 1;
2720
2721 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2722 BULK_URB_TX_SIZE))
2723 goto exit;
2724
2725 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2726 USB_DIR_IN);
2727 if (!serial->in_endp) {
2728 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2729 goto exit2;
2730 }
2731
2732 if (!
2733 (serial->out_endp =
2734 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2735 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2736 goto exit2;
2737 }
2738
2739 serial->write_data = hso_std_serial_write_data;
2740
2741 /* and record this serial */
2742 set_serial_by_index(serial->minor, serial);
2743
2744 /* setup the proc dirs and files if needed */
2745 hso_log_port(hso_dev);
2746
2747 /* done, return it */
2748 return hso_dev;
2749
2750 exit2:
2751 hso_serial_common_free(serial);
2752 exit:
2753 hso_free_tiomget(serial);
2754 kfree(serial);
2755 kfree(hso_dev);
2756 return NULL;
2757 }
2758
2759 /* Creates a multiplexed AT channel */
2760 static
2761 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2762 int port,
2763 struct hso_shared_int *mux)
2764 {
2765 struct hso_device *hso_dev;
2766 struct hso_serial *serial;
2767 int port_spec;
2768
2769 port_spec = HSO_INTF_MUX;
2770 port_spec &= ~HSO_PORT_MASK;
2771
2772 port_spec |= hso_mux_to_port(port);
2773 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2774 return NULL;
2775
2776 hso_dev = hso_create_device(interface, port_spec);
2777 if (!hso_dev)
2778 return NULL;
2779
2780 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2781 if (!serial)
2782 goto exit;
2783
2784 hso_dev->port_data.dev_serial = serial;
2785 serial->parent = hso_dev;
2786
2787 if (hso_serial_common_create
2788 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2789 goto exit;
2790
2791 serial->tx_data_length--;
2792 serial->write_data = hso_mux_serial_write_data;
2793
2794 serial->shared_int = mux;
2795 mutex_lock(&serial->shared_int->shared_int_lock);
2796 serial->shared_int->ref_count++;
2797 mutex_unlock(&serial->shared_int->shared_int_lock);
2798
2799 /* and record this serial */
2800 set_serial_by_index(serial->minor, serial);
2801
2802 /* setup the proc dirs and files if needed */
2803 hso_log_port(hso_dev);
2804
2805 /* done, return it */
2806 return hso_dev;
2807
2808 exit:
2809 if (serial) {
2810 tty_unregister_device(tty_drv, serial->minor);
2811 kfree(serial);
2812 }
2813 if (hso_dev)
2814 kfree(hso_dev);
2815 return NULL;
2816
2817 }
2818
2819 static void hso_free_shared_int(struct hso_shared_int *mux)
2820 {
2821 usb_free_urb(mux->shared_intr_urb);
2822 kfree(mux->shared_intr_buf);
2823 mutex_unlock(&mux->shared_int_lock);
2824 kfree(mux);
2825 }
2826
2827 static
2828 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2829 {
2830 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2831
2832 if (!mux)
2833 return NULL;
2834
2835 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2836 USB_DIR_IN);
2837 if (!mux->intr_endp) {
2838 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2839 goto exit;
2840 }
2841
2842 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2843 if (!mux->shared_intr_urb) {
2844 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2845 goto exit;
2846 }
2847 mux->shared_intr_buf =
2848 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2849 GFP_KERNEL);
2850 if (!mux->shared_intr_buf) {
2851 dev_err(&interface->dev, "Could not allocate intr buf?\n");
2852 goto exit;
2853 }
2854
2855 mutex_init(&mux->shared_int_lock);
2856
2857 return mux;
2858
2859 exit:
2860 kfree(mux->shared_intr_buf);
2861 usb_free_urb(mux->shared_intr_urb);
2862 kfree(mux);
2863 return NULL;
2864 }
2865
2866 /* Gets the port spec for a certain interface */
2867 static int hso_get_config_data(struct usb_interface *interface)
2868 {
2869 struct usb_device *usbdev = interface_to_usbdev(interface);
2870 u8 config_data[17];
2871 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2872 s32 result;
2873
2874 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2875 0x86, 0xC0, 0, 0, config_data, 17,
2876 USB_CTRL_SET_TIMEOUT) != 0x11) {
2877 return -EIO;
2878 }
2879
2880 switch (config_data[if_num]) {
2881 case 0x0:
2882 result = 0;
2883 break;
2884 case 0x1:
2885 result = HSO_PORT_DIAG;
2886 break;
2887 case 0x2:
2888 result = HSO_PORT_GPS;
2889 break;
2890 case 0x3:
2891 result = HSO_PORT_GPS_CONTROL;
2892 break;
2893 case 0x4:
2894 result = HSO_PORT_APP;
2895 break;
2896 case 0x5:
2897 result = HSO_PORT_APP2;
2898 break;
2899 case 0x6:
2900 result = HSO_PORT_CONTROL;
2901 break;
2902 case 0x7:
2903 result = HSO_PORT_NETWORK;
2904 break;
2905 case 0x8:
2906 result = HSO_PORT_MODEM;
2907 break;
2908 case 0x9:
2909 result = HSO_PORT_MSD;
2910 break;
2911 case 0xa:
2912 result = HSO_PORT_PCSC;
2913 break;
2914 case 0xb:
2915 result = HSO_PORT_VOICE;
2916 break;
2917 default:
2918 result = 0;
2919 }
2920
2921 if (result)
2922 result |= HSO_INTF_BULK;
2923
2924 if (config_data[16] & 0x1)
2925 result |= HSO_INFO_CRC_BUG;
2926
2927 return result;
2928 }
2929
2930 /* called once for each interface upon device insertion */
2931 static int hso_probe(struct usb_interface *interface,
2932 const struct usb_device_id *id)
2933 {
2934 int mux, i, if_num, port_spec;
2935 unsigned char port_mask;
2936 struct hso_device *hso_dev = NULL;
2937 struct hso_shared_int *shared_int;
2938 struct hso_device *tmp_dev = NULL;
2939
2940 if_num = interface->altsetting->desc.bInterfaceNumber;
2941
2942 /* Get the interface/port specification from either driver_info or from
2943 * the device itself */
2944 if (id->driver_info)
2945 port_spec = ((u32 *)(id->driver_info))[if_num];
2946 else
2947 port_spec = hso_get_config_data(interface);
2948
2949 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2950 dev_err(&interface->dev, "Not our interface\n");
2951 return -ENODEV;
2952 }
2953 /* Check if we need to switch to alt interfaces prior to port
2954 * configuration */
2955 if (interface->num_altsetting > 1)
2956 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2957 interface->needs_remote_wakeup = 1;
2958
2959 /* Allocate new hso device(s) */
2960 switch (port_spec & HSO_INTF_MASK) {
2961 case HSO_INTF_MUX:
2962 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2963 /* Create the network device */
2964 if (!disable_net) {
2965 hso_dev = hso_create_net_device(interface,
2966 port_spec);
2967 if (!hso_dev)
2968 goto exit;
2969 tmp_dev = hso_dev;
2970 }
2971 }
2972
2973 if (hso_get_mux_ports(interface, &port_mask))
2974 /* TODO: de-allocate everything */
2975 goto exit;
2976
2977 shared_int = hso_create_shared_int(interface);
2978 if (!shared_int)
2979 goto exit;
2980
2981 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2982 if (port_mask & i) {
2983 hso_dev = hso_create_mux_serial_device(
2984 interface, i, shared_int);
2985 if (!hso_dev)
2986 goto exit;
2987 }
2988 }
2989
2990 if (tmp_dev)
2991 hso_dev = tmp_dev;
2992 break;
2993
2994 case HSO_INTF_BULK:
2995 /* It's a regular bulk interface */
2996 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2997 if (!disable_net)
2998 hso_dev =
2999 hso_create_net_device(interface, port_spec);
3000 } else {
3001 hso_dev =
3002 hso_create_bulk_serial_device(interface, port_spec);
3003 }
3004 if (!hso_dev)
3005 goto exit;
3006 break;
3007 default:
3008 goto exit;
3009 }
3010
3011 /* save our data pointer in this device */
3012 usb_set_intfdata(interface, hso_dev);
3013
3014 /* done */
3015 return 0;
3016 exit:
3017 hso_free_interface(interface);
3018 return -ENODEV;
3019 }
3020
3021 /* device removed, cleaning up */
3022 static void hso_disconnect(struct usb_interface *interface)
3023 {
3024 hso_free_interface(interface);
3025
3026 /* remove reference of our private data */
3027 usb_set_intfdata(interface, NULL);
3028 }
3029
3030 static void async_get_intf(struct work_struct *data)
3031 {
3032 struct hso_device *hso_dev =
3033 container_of(data, struct hso_device, async_get_intf);
3034 usb_autopm_get_interface(hso_dev->interface);
3035 }
3036
3037 static void async_put_intf(struct work_struct *data)
3038 {
3039 struct hso_device *hso_dev =
3040 container_of(data, struct hso_device, async_put_intf);
3041 usb_autopm_put_interface(hso_dev->interface);
3042 }
3043
3044 static int hso_get_activity(struct hso_device *hso_dev)
3045 {
3046 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3047 if (!hso_dev->is_active) {
3048 hso_dev->is_active = 1;
3049 schedule_work(&hso_dev->async_get_intf);
3050 }
3051 }
3052
3053 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3054 return -EAGAIN;
3055
3056 usb_mark_last_busy(hso_dev->usb);
3057
3058 return 0;
3059 }
3060
3061 static int hso_put_activity(struct hso_device *hso_dev)
3062 {
3063 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3064 if (hso_dev->is_active) {
3065 hso_dev->is_active = 0;
3066 schedule_work(&hso_dev->async_put_intf);
3067 return -EAGAIN;
3068 }
3069 }
3070 hso_dev->is_active = 0;
3071 return 0;
3072 }
3073
3074 /* called by kernel when we need to suspend device */
3075 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3076 {
3077 int i, result;
3078
3079 /* Stop all serial ports */
3080 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3081 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3082 result = hso_stop_serial_device(serial_table[i]);
3083 if (result)
3084 goto out;
3085 }
3086 }
3087
3088 /* Stop all network ports */
3089 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3090 if (network_table[i] &&
3091 (network_table[i]->interface == iface)) {
3092 result = hso_stop_net_device(network_table[i]);
3093 if (result)
3094 goto out;
3095 }
3096 }
3097
3098 out:
3099 return 0;
3100 }
3101
3102 /* called by kernel when we need to resume device */
3103 static int hso_resume(struct usb_interface *iface)
3104 {
3105 int i, result = 0;
3106 struct hso_net *hso_net;
3107
3108 /* Start all serial ports */
3109 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3110 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3111 if (dev2ser(serial_table[i])->open_count) {
3112 result =
3113 hso_start_serial_device(serial_table[i], GFP_NOIO);
3114 hso_kick_transmit(dev2ser(serial_table[i]));
3115 if (result)
3116 goto out;
3117 }
3118 }
3119 }
3120
3121 /* Start all network ports */
3122 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3123 if (network_table[i] &&
3124 (network_table[i]->interface == iface)) {
3125 hso_net = dev2net(network_table[i]);
3126 if (hso_net->flags & IFF_UP) {
3127 /* First transmit any lingering data,
3128 then restart the device. */
3129 if (hso_net->skb_tx_buf) {
3130 dev_dbg(&iface->dev,
3131 "Transmitting"
3132 " lingering data\n");
3133 hso_net_start_xmit(hso_net->skb_tx_buf,
3134 hso_net->net);
3135 hso_net->skb_tx_buf = NULL;
3136 }
3137 result = hso_start_net_device(network_table[i]);
3138 if (result)
3139 goto out;
3140 }
3141 }
3142 }
3143
3144 out:
3145 return result;
3146 }
3147
3148 static void reset_device(struct work_struct *data)
3149 {
3150 struct hso_device *hso_dev =
3151 container_of(data, struct hso_device, reset_device);
3152 struct usb_device *usb = hso_dev->usb;
3153 int result;
3154
3155 if (hso_dev->usb_gone) {
3156 D1("No reset during disconnect\n");
3157 } else {
3158 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3159 if (result < 0)
3160 D1("unable to lock device for reset: %d\n", result);
3161 else {
3162 usb_reset_device(usb);
3163 usb_unlock_device(usb);
3164 }
3165 }
3166 }
3167
3168 static void hso_serial_ref_free(struct kref *ref)
3169 {
3170 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3171
3172 hso_free_serial_device(hso_dev);
3173 }
3174
3175 static void hso_free_interface(struct usb_interface *interface)
3176 {
3177 struct hso_serial *hso_dev;
3178 struct tty_struct *tty;
3179 int i;
3180
3181 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3182 if (serial_table[i] &&
3183 (serial_table[i]->interface == interface)) {
3184 hso_dev = dev2ser(serial_table[i]);
3185 spin_lock_irq(&hso_dev->serial_lock);
3186 tty = tty_kref_get(hso_dev->tty);
3187 spin_unlock_irq(&hso_dev->serial_lock);
3188 if (tty)
3189 tty_hangup(tty);
3190 mutex_lock(&hso_dev->parent->mutex);
3191 tty_kref_put(tty);
3192 hso_dev->parent->usb_gone = 1;
3193 mutex_unlock(&hso_dev->parent->mutex);
3194 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3195 }
3196 }
3197
3198 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3199 if (network_table[i] &&
3200 (network_table[i]->interface == interface)) {
3201 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3202 /* hso_stop_net_device doesn't stop the net queue since
3203 * traffic needs to start it again when suspended */
3204 netif_stop_queue(dev2net(network_table[i])->net);
3205 hso_stop_net_device(network_table[i]);
3206 cancel_work_sync(&network_table[i]->async_put_intf);
3207 cancel_work_sync(&network_table[i]->async_get_intf);
3208 if (rfk) {
3209 rfkill_unregister(rfk);
3210 rfkill_destroy(rfk);
3211 }
3212 hso_free_net_device(network_table[i]);
3213 }
3214 }
3215 }
3216
3217 /* Helper functions */
3218
3219 /* Get the endpoint ! */
3220 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3221 int type, int dir)
3222 {
3223 int i;
3224 struct usb_host_interface *iface = intf->cur_altsetting;
3225 struct usb_endpoint_descriptor *endp;
3226
3227 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3228 endp = &iface->endpoint[i].desc;
3229 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3230 (usb_endpoint_type(endp) == type))
3231 return endp;
3232 }
3233
3234 return NULL;
3235 }
3236
3237 /* Get the byte that describes which ports are enabled */
3238 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3239 {
3240 int i;
3241 struct usb_host_interface *iface = intf->cur_altsetting;
3242
3243 if (iface->extralen == 3) {
3244 *ports = iface->extra[2];
3245 return 0;
3246 }
3247
3248 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3249 if (iface->endpoint[i].extralen == 3) {
3250 *ports = iface->endpoint[i].extra[2];
3251 return 0;
3252 }
3253 }
3254
3255 return -1;
3256 }
3257
3258 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3259 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3260 struct usb_device *usb, gfp_t gfp)
3261 {
3262 int result;
3263
3264 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3265 usb_rcvintpipe(usb,
3266 shared_int->intr_endp->bEndpointAddress & 0x7F),
3267 shared_int->shared_intr_buf,
3268 1,
3269 intr_callback, shared_int,
3270 shared_int->intr_endp->bInterval);
3271
3272 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3273 if (result)
3274 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3275 result);
3276
3277 return result;
3278 }
3279
3280 /* operations setup of the serial interface */
3281 static const struct tty_operations hso_serial_ops = {
3282 .open = hso_serial_open,
3283 .close = hso_serial_close,
3284 .write = hso_serial_write,
3285 .write_room = hso_serial_write_room,
3286 .ioctl = hso_serial_ioctl,
3287 .set_termios = hso_serial_set_termios,
3288 .chars_in_buffer = hso_serial_chars_in_buffer,
3289 .tiocmget = hso_serial_tiocmget,
3290 .tiocmset = hso_serial_tiocmset,
3291 .get_icount = hso_get_count,
3292 .unthrottle = hso_unthrottle
3293 };
3294
3295 static struct usb_driver hso_driver = {
3296 .name = driver_name,
3297 .probe = hso_probe,
3298 .disconnect = hso_disconnect,
3299 .id_table = hso_ids,
3300 .suspend = hso_suspend,
3301 .resume = hso_resume,
3302 .reset_resume = hso_resume,
3303 .supports_autosuspend = 1,
3304 };
3305
3306 static int __init hso_init(void)
3307 {
3308 int i;
3309 int result;
3310
3311 /* put it in the log */
3312 printk(KERN_INFO "hso: %s\n", version);
3313
3314 /* Initialise the serial table semaphore and table */
3315 spin_lock_init(&serial_table_lock);
3316 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3317 serial_table[i] = NULL;
3318
3319 /* allocate our driver using the proper amount of supported minors */
3320 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3321 if (!tty_drv)
3322 return -ENOMEM;
3323
3324 /* fill in all needed values */
3325 tty_drv->magic = TTY_DRIVER_MAGIC;
3326 tty_drv->owner = THIS_MODULE;
3327 tty_drv->driver_name = driver_name;
3328 tty_drv->name = tty_filename;
3329
3330 /* if major number is provided as parameter, use that one */
3331 if (tty_major)
3332 tty_drv->major = tty_major;
3333
3334 tty_drv->minor_start = 0;
3335 tty_drv->num = HSO_SERIAL_TTY_MINORS;
3336 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3337 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3338 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3339 tty_drv->init_termios = tty_std_termios;
3340 hso_init_termios(&tty_drv->init_termios);
3341 tty_set_operations(tty_drv, &hso_serial_ops);
3342
3343 /* register the tty driver */
3344 result = tty_register_driver(tty_drv);
3345 if (result) {
3346 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3347 __func__, result);
3348 return result;
3349 }
3350
3351 /* register this module as an usb driver */
3352 result = usb_register(&hso_driver);
3353 if (result) {
3354 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3355 result);
3356 /* cleanup serial interface */
3357 tty_unregister_driver(tty_drv);
3358 return result;
3359 }
3360
3361 /* done */
3362 return 0;
3363 }
3364
3365 static void __exit hso_exit(void)
3366 {
3367 printk(KERN_INFO "hso: unloaded\n");
3368
3369 tty_unregister_driver(tty_drv);
3370 /* deregister the usb driver */
3371 usb_deregister(&hso_driver);
3372 }
3373
3374 /* Module definitions */
3375 module_init(hso_init);
3376 module_exit(hso_exit);
3377
3378 MODULE_AUTHOR(MOD_AUTHOR);
3379 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3380 MODULE_LICENSE(MOD_LICENSE);
3381
3382 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3383 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3384 module_param(debug, int, S_IRUGO | S_IWUSR);
3385
3386 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3387 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3388 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3389
3390 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3391 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3392 module_param(disable_net, int, S_IRUGO | S_IWUSR);
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