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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[linux-2.6/btrfs-unstable.git] / drivers / net / usb / hso.c
blob9c5aa922a9f4bdb404588b74962769510be13887
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 /*****************************************************************************/
110 /* Debugging functions */
111 /*****************************************************************************/
112 #define D__(lvl_, fmt, arg...) \
113 do { \
114 printk(lvl_ "[%d:%s]: " fmt "\n", \
115 __LINE__, __func__, ## arg); \
116 } while (0)
117
118 #define D_(lvl, args...) \
119 do { \
120 if (lvl & debug) \
121 D__(KERN_INFO, args); \
122 } while (0)
123
124 #define D1(args...) D_(0x01, ##args)
125 #define D2(args...) D_(0x02, ##args)
126 #define D3(args...) D_(0x04, ##args)
127 #define D4(args...) D_(0x08, ##args)
128 #define D5(args...) D_(0x10, ##args)
129
130 /*****************************************************************************/
131 /* Enumerators */
132 /*****************************************************************************/
133 enum pkt_parse_state {
134 WAIT_IP,
135 WAIT_DATA,
136 WAIT_SYNC
137 };
138
139 /*****************************************************************************/
140 /* Structs */
141 /*****************************************************************************/
142
143 struct hso_shared_int {
144 struct usb_endpoint_descriptor *intr_endp;
145 void *shared_intr_buf;
146 struct urb *shared_intr_urb;
147 struct usb_device *usb;
148 int use_count;
149 int ref_count;
150 struct mutex shared_int_lock;
151 };
152
153 struct hso_net {
154 struct hso_device *parent;
155 struct net_device *net;
156 struct rfkill *rfkill;
157
158 struct usb_endpoint_descriptor *in_endp;
159 struct usb_endpoint_descriptor *out_endp;
160
161 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
162 struct urb *mux_bulk_tx_urb;
163 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
164 void *mux_bulk_tx_buf;
165
166 struct sk_buff *skb_rx_buf;
167 struct sk_buff *skb_tx_buf;
168
169 enum pkt_parse_state rx_parse_state;
170 spinlock_t net_lock;
171
172 unsigned short rx_buf_size;
173 unsigned short rx_buf_missing;
174 struct iphdr rx_ip_hdr;
175
176 unsigned long flags;
177 };
178
179 enum rx_ctrl_state{
180 RX_IDLE,
181 RX_SENT,
182 RX_PENDING
183 };
184
185 #define BM_REQUEST_TYPE (0xa1)
186 #define B_NOTIFICATION (0x20)
187 #define W_VALUE (0x0)
188 #define W_LENGTH (0x2)
189
190 #define B_OVERRUN (0x1<<6)
191 #define B_PARITY (0x1<<5)
192 #define B_FRAMING (0x1<<4)
193 #define B_RING_SIGNAL (0x1<<3)
194 #define B_BREAK (0x1<<2)
195 #define B_TX_CARRIER (0x1<<1)
196 #define B_RX_CARRIER (0x1<<0)
197
198 struct hso_serial_state_notification {
199 u8 bmRequestType;
200 u8 bNotification;
201 u16 wValue;
202 u16 wIndex;
203 u16 wLength;
204 u16 UART_state_bitmap;
205 } __packed;
206
207 struct hso_tiocmget {
208 struct mutex mutex;
209 wait_queue_head_t waitq;
210 int intr_completed;
211 struct usb_endpoint_descriptor *endp;
212 struct urb *urb;
213 struct hso_serial_state_notification serial_state_notification;
214 u16 prev_UART_state_bitmap;
215 struct uart_icount icount;
216 };
217
218
219 struct hso_serial {
220 struct hso_device *parent;
221 int magic;
222 u8 minor;
223
224 struct hso_shared_int *shared_int;
225
226 /* rx/tx urb could be either a bulk urb or a control urb depending
227 on which serial port it is used on. */
228 struct urb *rx_urb[MAX_RX_URBS];
229 u8 num_rx_urbs;
230 u8 *rx_data[MAX_RX_URBS];
231 u16 rx_data_length; /* should contain allocated length */
232
233 struct urb *tx_urb;
234 u8 *tx_data;
235 u8 *tx_buffer;
236 u16 tx_data_length; /* should contain allocated length */
237 u16 tx_data_count;
238 u16 tx_buffer_count;
239 struct usb_ctrlrequest ctrl_req_tx;
240 struct usb_ctrlrequest ctrl_req_rx;
241
242 struct usb_endpoint_descriptor *in_endp;
243 struct usb_endpoint_descriptor *out_endp;
244
245 enum rx_ctrl_state rx_state;
246 u8 rts_state;
247 u8 dtr_state;
248 unsigned tx_urb_used:1;
249
250 struct tty_port port;
251 /* from usb_serial_port */
252 spinlock_t serial_lock;
253
254 int (*write_data) (struct hso_serial *serial);
255 struct hso_tiocmget *tiocmget;
256 /* Hacks required to get flow control
257 * working on the serial receive buffers
258 * so as not to drop characters on the floor.
259 */
260 int curr_rx_urb_idx;
261 u8 rx_urb_filled[MAX_RX_URBS];
262 struct tasklet_struct unthrottle_tasklet;
263 };
264
265 struct hso_device {
266 union {
267 struct hso_serial *dev_serial;
268 struct hso_net *dev_net;
269 } port_data;
270
271 u32 port_spec;
272
273 u8 is_active;
274 u8 usb_gone;
275 struct work_struct async_get_intf;
276 struct work_struct async_put_intf;
277 struct work_struct reset_device;
278
279 struct usb_device *usb;
280 struct usb_interface *interface;
281
282 struct device *dev;
283 struct kref ref;
284 struct mutex mutex;
285 };
286
287 /* Type of interface */
288 #define HSO_INTF_MASK 0xFF00
289 #define HSO_INTF_MUX 0x0100
290 #define HSO_INTF_BULK 0x0200
291
292 /* Type of port */
293 #define HSO_PORT_MASK 0xFF
294 #define HSO_PORT_NO_PORT 0x0
295 #define HSO_PORT_CONTROL 0x1
296 #define HSO_PORT_APP 0x2
297 #define HSO_PORT_GPS 0x3
298 #define HSO_PORT_PCSC 0x4
299 #define HSO_PORT_APP2 0x5
300 #define HSO_PORT_GPS_CONTROL 0x6
301 #define HSO_PORT_MSD 0x7
302 #define HSO_PORT_VOICE 0x8
303 #define HSO_PORT_DIAG2 0x9
304 #define HSO_PORT_DIAG 0x10
305 #define HSO_PORT_MODEM 0x11
306 #define HSO_PORT_NETWORK 0x12
307
308 /* Additional device info */
309 #define HSO_INFO_MASK 0xFF000000
310 #define HSO_INFO_CRC_BUG 0x01000000
311
312 /*****************************************************************************/
313 /* Prototypes */
314 /*****************************************************************************/
315 /* Serial driver functions */
316 static int hso_serial_tiocmset(struct tty_struct *tty,
317 unsigned int set, unsigned int clear);
318 static void ctrl_callback(struct urb *urb);
319 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
320 static void hso_kick_transmit(struct hso_serial *serial);
321 /* Helper functions */
322 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
323 struct usb_device *usb, gfp_t gfp);
324 static void handle_usb_error(int status, const char *function,
325 struct hso_device *hso_dev);
326 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
327 int type, int dir);
328 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
329 static void hso_free_interface(struct usb_interface *intf);
330 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
331 static int hso_stop_serial_device(struct hso_device *hso_dev);
332 static int hso_start_net_device(struct hso_device *hso_dev);
333 static void hso_free_shared_int(struct hso_shared_int *shared_int);
334 static int hso_stop_net_device(struct hso_device *hso_dev);
335 static void hso_serial_ref_free(struct kref *ref);
336 static void hso_std_serial_read_bulk_callback(struct urb *urb);
337 static int hso_mux_serial_read(struct hso_serial *serial);
338 static void async_get_intf(struct work_struct *data);
339 static void async_put_intf(struct work_struct *data);
340 static int hso_put_activity(struct hso_device *hso_dev);
341 static int hso_get_activity(struct hso_device *hso_dev);
342 static void tiocmget_intr_callback(struct urb *urb);
343 static void reset_device(struct work_struct *data);
344 /*****************************************************************************/
345 /* Helping functions */
346 /*****************************************************************************/
347
348 /* #define DEBUG */
349
350 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
351 {
352 return hso_dev->port_data.dev_net;
353 }
354
355 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
356 {
357 return hso_dev->port_data.dev_serial;
358 }
359
360 /* Debugging functions */
361 #ifdef DEBUG
362 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
363 unsigned int len)
364 {
365 static char name[255];
366
367 sprintf(name, "hso[%d:%s]", line_count, func_name);
368 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
369 }
370
371 #define DUMP(buf_, len_) \
372 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
373
374 #define DUMP1(buf_, len_) \
375 do { \
376 if (0x01 & debug) \
377 DUMP(buf_, len_); \
378 } while (0)
379 #else
380 #define DUMP(buf_, len_)
381 #define DUMP1(buf_, len_)
382 #endif
383
384 /* module parameters */
385 static int debug;
386 static int tty_major;
387 static int disable_net;
388
389 /* driver info */
390 static const char driver_name[] = "hso";
391 static const char tty_filename[] = "ttyHS";
392 static const char *version = __FILE__ ": " MOD_AUTHOR;
393 /* the usb driver itself (registered in hso_init) */
394 static struct usb_driver hso_driver;
395 /* serial structures */
396 static struct tty_driver *tty_drv;
397 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
398 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
399 static spinlock_t serial_table_lock;
400
401 static const s32 default_port_spec[] = {
402 HSO_INTF_MUX | HSO_PORT_NETWORK,
403 HSO_INTF_BULK | HSO_PORT_DIAG,
404 HSO_INTF_BULK | HSO_PORT_MODEM,
405 0
406 };
407
408 static const s32 icon321_port_spec[] = {
409 HSO_INTF_MUX | HSO_PORT_NETWORK,
410 HSO_INTF_BULK | HSO_PORT_DIAG2,
411 HSO_INTF_BULK | HSO_PORT_MODEM,
412 HSO_INTF_BULK | HSO_PORT_DIAG,
413 0
414 };
415
416 #define default_port_device(vendor, product) \
417 USB_DEVICE(vendor, product), \
418 .driver_info = (kernel_ulong_t)default_port_spec
419
420 #define icon321_port_device(vendor, product) \
421 USB_DEVICE(vendor, product), \
422 .driver_info = (kernel_ulong_t)icon321_port_spec
423
424 /* list of devices we support */
425 static const struct usb_device_id hso_ids[] = {
426 {default_port_device(0x0af0, 0x6711)},
427 {default_port_device(0x0af0, 0x6731)},
428 {default_port_device(0x0af0, 0x6751)},
429 {default_port_device(0x0af0, 0x6771)},
430 {default_port_device(0x0af0, 0x6791)},
431 {default_port_device(0x0af0, 0x6811)},
432 {default_port_device(0x0af0, 0x6911)},
433 {default_port_device(0x0af0, 0x6951)},
434 {default_port_device(0x0af0, 0x6971)},
435 {default_port_device(0x0af0, 0x7011)},
436 {default_port_device(0x0af0, 0x7031)},
437 {default_port_device(0x0af0, 0x7051)},
438 {default_port_device(0x0af0, 0x7071)},
439 {default_port_device(0x0af0, 0x7111)},
440 {default_port_device(0x0af0, 0x7211)},
441 {default_port_device(0x0af0, 0x7251)},
442 {default_port_device(0x0af0, 0x7271)},
443 {default_port_device(0x0af0, 0x7311)},
444 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
445 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
446 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
447 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
448 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
449 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
450 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
451 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
452 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
453 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
454 {USB_DEVICE(0x0af0, 0x7701)},
455 {USB_DEVICE(0x0af0, 0x7706)},
456 {USB_DEVICE(0x0af0, 0x7801)},
457 {USB_DEVICE(0x0af0, 0x7901)},
458 {USB_DEVICE(0x0af0, 0x7A01)},
459 {USB_DEVICE(0x0af0, 0x7A05)},
460 {USB_DEVICE(0x0af0, 0x8200)},
461 {USB_DEVICE(0x0af0, 0x8201)},
462 {USB_DEVICE(0x0af0, 0x8300)},
463 {USB_DEVICE(0x0af0, 0x8302)},
464 {USB_DEVICE(0x0af0, 0x8304)},
465 {USB_DEVICE(0x0af0, 0x8400)},
466 {USB_DEVICE(0x0af0, 0x8600)},
467 {USB_DEVICE(0x0af0, 0x8800)},
468 {USB_DEVICE(0x0af0, 0x8900)},
469 {USB_DEVICE(0x0af0, 0x9000)},
470 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */
471 {USB_DEVICE(0x0af0, 0xd035)},
472 {USB_DEVICE(0x0af0, 0xd055)},
473 {USB_DEVICE(0x0af0, 0xd155)},
474 {USB_DEVICE(0x0af0, 0xd255)},
475 {USB_DEVICE(0x0af0, 0xd057)},
476 {USB_DEVICE(0x0af0, 0xd157)},
477 {USB_DEVICE(0x0af0, 0xd257)},
478 {USB_DEVICE(0x0af0, 0xd357)},
479 {USB_DEVICE(0x0af0, 0xd058)},
480 {USB_DEVICE(0x0af0, 0xc100)},
481 {}
482 };
483 MODULE_DEVICE_TABLE(usb, hso_ids);
484
485 /* Sysfs attribute */
486 static ssize_t hso_sysfs_show_porttype(struct device *dev,
487 struct device_attribute *attr,
488 char *buf)
489 {
490 struct hso_device *hso_dev = dev_get_drvdata(dev);
491 char *port_name;
492
493 if (!hso_dev)
494 return 0;
495
496 switch (hso_dev->port_spec & HSO_PORT_MASK) {
497 case HSO_PORT_CONTROL:
498 port_name = "Control";
499 break;
500 case HSO_PORT_APP:
501 port_name = "Application";
502 break;
503 case HSO_PORT_APP2:
504 port_name = "Application2";
505 break;
506 case HSO_PORT_GPS:
507 port_name = "GPS";
508 break;
509 case HSO_PORT_GPS_CONTROL:
510 port_name = "GPS Control";
511 break;
512 case HSO_PORT_PCSC:
513 port_name = "PCSC";
514 break;
515 case HSO_PORT_DIAG:
516 port_name = "Diagnostic";
517 break;
518 case HSO_PORT_DIAG2:
519 port_name = "Diagnostic2";
520 break;
521 case HSO_PORT_MODEM:
522 port_name = "Modem";
523 break;
524 case HSO_PORT_NETWORK:
525 port_name = "Network";
526 break;
527 default:
528 port_name = "Unknown";
529 break;
530 }
531
532 return sprintf(buf, "%s\n", port_name);
533 }
534 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
535
536 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
537 {
538 int idx;
539
540 for (idx = 0; idx < serial->num_rx_urbs; idx++)
541 if (serial->rx_urb[idx] == urb)
542 return idx;
543 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
544 return -1;
545 }
546
547 /* converts mux value to a port spec value */
548 static u32 hso_mux_to_port(int mux)
549 {
550 u32 result;
551
552 switch (mux) {
553 case 0x1:
554 result = HSO_PORT_CONTROL;
555 break;
556 case 0x2:
557 result = HSO_PORT_APP;
558 break;
559 case 0x4:
560 result = HSO_PORT_PCSC;
561 break;
562 case 0x8:
563 result = HSO_PORT_GPS;
564 break;
565 case 0x10:
566 result = HSO_PORT_APP2;
567 break;
568 default:
569 result = HSO_PORT_NO_PORT;
570 }
571 return result;
572 }
573
574 /* converts port spec value to a mux value */
575 static u32 hso_port_to_mux(int port)
576 {
577 u32 result;
578
579 switch (port & HSO_PORT_MASK) {
580 case HSO_PORT_CONTROL:
581 result = 0x0;
582 break;
583 case HSO_PORT_APP:
584 result = 0x1;
585 break;
586 case HSO_PORT_PCSC:
587 result = 0x2;
588 break;
589 case HSO_PORT_GPS:
590 result = 0x3;
591 break;
592 case HSO_PORT_APP2:
593 result = 0x4;
594 break;
595 default:
596 result = 0x0;
597 }
598 return result;
599 }
600
601 static struct hso_serial *get_serial_by_shared_int_and_type(
602 struct hso_shared_int *shared_int,
603 int mux)
604 {
605 int i, port;
606
607 port = hso_mux_to_port(mux);
608
609 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
610 if (serial_table[i] &&
611 (dev2ser(serial_table[i])->shared_int == shared_int) &&
612 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
613 return dev2ser(serial_table[i]);
614 }
615 }
616
617 return NULL;
618 }
619
620 static struct hso_serial *get_serial_by_index(unsigned index)
621 {
622 struct hso_serial *serial = NULL;
623 unsigned long flags;
624
625 spin_lock_irqsave(&serial_table_lock, flags);
626 if (serial_table[index])
627 serial = dev2ser(serial_table[index]);
628 spin_unlock_irqrestore(&serial_table_lock, flags);
629
630 return serial;
631 }
632
633 static int get_free_serial_index(void)
634 {
635 int index;
636 unsigned long flags;
637
638 spin_lock_irqsave(&serial_table_lock, flags);
639 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
640 if (serial_table[index] == NULL) {
641 spin_unlock_irqrestore(&serial_table_lock, flags);
642 return index;
643 }
644 }
645 spin_unlock_irqrestore(&serial_table_lock, flags);
646
647 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
648 return -1;
649 }
650
651 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
652 {
653 unsigned long flags;
654
655 spin_lock_irqsave(&serial_table_lock, flags);
656 if (serial)
657 serial_table[index] = serial->parent;
658 else
659 serial_table[index] = NULL;
660 spin_unlock_irqrestore(&serial_table_lock, flags);
661 }
662
663 static void handle_usb_error(int status, const char *function,
664 struct hso_device *hso_dev)
665 {
666 char *explanation;
667
668 switch (status) {
669 case -ENODEV:
670 explanation = "no device";
671 break;
672 case -ENOENT:
673 explanation = "endpoint not enabled";
674 break;
675 case -EPIPE:
676 explanation = "endpoint stalled";
677 break;
678 case -ENOSPC:
679 explanation = "not enough bandwidth";
680 break;
681 case -ESHUTDOWN:
682 explanation = "device disabled";
683 break;
684 case -EHOSTUNREACH:
685 explanation = "device suspended";
686 break;
687 case -EINVAL:
688 case -EAGAIN:
689 case -EFBIG:
690 case -EMSGSIZE:
691 explanation = "internal error";
692 break;
693 case -EILSEQ:
694 case -EPROTO:
695 case -ETIME:
696 case -ETIMEDOUT:
697 explanation = "protocol error";
698 if (hso_dev)
699 schedule_work(&hso_dev->reset_device);
700 break;
701 default:
702 explanation = "unknown status";
703 break;
704 }
705
706 /* log a meaningful explanation of an USB status */
707 D1("%s: received USB status - %s (%d)", function, explanation, status);
708 }
709
710 /* Network interface functions */
711
712 /* called when net interface is brought up by ifconfig */
713 static int hso_net_open(struct net_device *net)
714 {
715 struct hso_net *odev = netdev_priv(net);
716 unsigned long flags = 0;
717
718 if (!odev) {
719 dev_err(&net->dev, "No net device !\n");
720 return -ENODEV;
721 }
722
723 odev->skb_tx_buf = NULL;
724
725 /* setup environment */
726 spin_lock_irqsave(&odev->net_lock, flags);
727 odev->rx_parse_state = WAIT_IP;
728 odev->rx_buf_size = 0;
729 odev->rx_buf_missing = sizeof(struct iphdr);
730 spin_unlock_irqrestore(&odev->net_lock, flags);
731
732 /* We are up and running. */
733 set_bit(HSO_NET_RUNNING, &odev->flags);
734 hso_start_net_device(odev->parent);
735
736 /* Tell the kernel we are ready to start receiving from it */
737 netif_start_queue(net);
738
739 return 0;
740 }
741
742 /* called when interface is brought down by ifconfig */
743 static int hso_net_close(struct net_device *net)
744 {
745 struct hso_net *odev = netdev_priv(net);
746
747 /* we don't need the queue anymore */
748 netif_stop_queue(net);
749 /* no longer running */
750 clear_bit(HSO_NET_RUNNING, &odev->flags);
751
752 hso_stop_net_device(odev->parent);
753
754 /* done */
755 return 0;
756 }
757
758 /* USB tells is xmit done, we should start the netqueue again */
759 static void write_bulk_callback(struct urb *urb)
760 {
761 struct hso_net *odev = urb->context;
762 int status = urb->status;
763
764 /* Sanity check */
765 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
766 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
767 return;
768 }
769
770 /* Do we still have a valid kernel network device? */
771 if (!netif_device_present(odev->net)) {
772 dev_err(&urb->dev->dev, "%s: net device not present\n",
773 __func__);
774 return;
775 }
776
777 /* log status, but don't act on it, we don't need to resubmit anything
778 * anyhow */
779 if (status)
780 handle_usb_error(status, __func__, odev->parent);
781
782 hso_put_activity(odev->parent);
783
784 /* Tell the network interface we are ready for another frame */
785 netif_wake_queue(odev->net);
786 }
787
788 /* called by kernel when we need to transmit a packet */
789 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
790 struct net_device *net)
791 {
792 struct hso_net *odev = netdev_priv(net);
793 int result;
794
795 /* Tell the kernel, "No more frames 'til we are done with this one." */
796 netif_stop_queue(net);
797 if (hso_get_activity(odev->parent) == -EAGAIN) {
798 odev->skb_tx_buf = skb;
799 return NETDEV_TX_OK;
800 }
801
802 /* log if asked */
803 DUMP1(skb->data, skb->len);
804 /* Copy it from kernel memory to OUR memory */
805 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
806 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
807
808 /* Fill in the URB for shipping it out. */
809 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
810 odev->parent->usb,
811 usb_sndbulkpipe(odev->parent->usb,
812 odev->out_endp->
813 bEndpointAddress & 0x7F),
814 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
815 odev);
816
817 /* Deal with the Zero Length packet problem, I hope */
818 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
819
820 /* Send the URB on its merry way. */
821 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
822 if (result) {
823 dev_warn(&odev->parent->interface->dev,
824 "failed mux_bulk_tx_urb %d\n", result);
825 net->stats.tx_errors++;
826 netif_start_queue(net);
827 } else {
828 net->stats.tx_packets++;
829 net->stats.tx_bytes += skb->len;
830 }
831 dev_kfree_skb(skb);
832 /* we're done */
833 return NETDEV_TX_OK;
834 }
835
836 static const struct ethtool_ops ops = {
837 .get_link = ethtool_op_get_link
838 };
839
840 /* called when a packet did not ack after watchdogtimeout */
841 static void hso_net_tx_timeout(struct net_device *net)
842 {
843 struct hso_net *odev = netdev_priv(net);
844
845 if (!odev)
846 return;
847
848 /* Tell syslog we are hosed. */
849 dev_warn(&net->dev, "Tx timed out.\n");
850
851 /* Tear the waiting frame off the list */
852 if (odev->mux_bulk_tx_urb &&
853 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
854 usb_unlink_urb(odev->mux_bulk_tx_urb);
855
856 /* Update statistics */
857 net->stats.tx_errors++;
858 }
859
860 /* make a real packet from the received USB buffer */
861 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
862 unsigned int count, unsigned char is_eop)
863 {
864 unsigned short temp_bytes;
865 unsigned short buffer_offset = 0;
866 unsigned short frame_len;
867 unsigned char *tmp_rx_buf;
868
869 /* log if needed */
870 D1("Rx %d bytes", count);
871 DUMP(ip_pkt, min(128, (int)count));
872
873 while (count) {
874 switch (odev->rx_parse_state) {
875 case WAIT_IP:
876 /* waiting for IP header. */
877 /* wanted bytes - size of ip header */
878 temp_bytes =
879 (count <
880 odev->rx_buf_missing) ? count : odev->
881 rx_buf_missing;
882
883 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
884 odev->rx_buf_size, ip_pkt + buffer_offset,
885 temp_bytes);
886
887 odev->rx_buf_size += temp_bytes;
888 buffer_offset += temp_bytes;
889 odev->rx_buf_missing -= temp_bytes;
890 count -= temp_bytes;
891
892 if (!odev->rx_buf_missing) {
893 /* header is complete allocate an sk_buffer and
894 * continue to WAIT_DATA */
895 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
896
897 if ((frame_len > DEFAULT_MRU) ||
898 (frame_len < sizeof(struct iphdr))) {
899 dev_err(&odev->net->dev,
900 "Invalid frame (%d) length\n",
901 frame_len);
902 odev->rx_parse_state = WAIT_SYNC;
903 continue;
904 }
905 /* Allocate an sk_buff */
906 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
907 frame_len);
908 if (!odev->skb_rx_buf) {
909 /* We got no receive buffer. */
910 D1("could not allocate memory");
911 odev->rx_parse_state = WAIT_SYNC;
912 return;
913 }
914
915 /* Copy what we got so far. make room for iphdr
916 * after tail. */
917 tmp_rx_buf =
918 skb_put(odev->skb_rx_buf,
919 sizeof(struct iphdr));
920 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
921 sizeof(struct iphdr));
922
923 /* ETH_HLEN */
924 odev->rx_buf_size = sizeof(struct iphdr);
925
926 /* Filip actually use .tot_len */
927 odev->rx_buf_missing =
928 frame_len - sizeof(struct iphdr);
929 odev->rx_parse_state = WAIT_DATA;
930 }
931 break;
932
933 case WAIT_DATA:
934 temp_bytes = (count < odev->rx_buf_missing)
935 ? count : odev->rx_buf_missing;
936
937 /* Copy the rest of the bytes that are left in the
938 * buffer into the waiting sk_buf. */
939 /* Make room for temp_bytes after tail. */
940 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
941 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
942
943 odev->rx_buf_missing -= temp_bytes;
944 count -= temp_bytes;
945 buffer_offset += temp_bytes;
946 odev->rx_buf_size += temp_bytes;
947 if (!odev->rx_buf_missing) {
948 /* Packet is complete. Inject into stack. */
949 /* We have IP packet here */
950 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
951 skb_reset_mac_header(odev->skb_rx_buf);
952
953 /* Ship it off to the kernel */
954 netif_rx(odev->skb_rx_buf);
955 /* No longer our buffer. */
956 odev->skb_rx_buf = NULL;
957
958 /* update out statistics */
959 odev->net->stats.rx_packets++;
960
961 odev->net->stats.rx_bytes += odev->rx_buf_size;
962
963 odev->rx_buf_size = 0;
964 odev->rx_buf_missing = sizeof(struct iphdr);
965 odev->rx_parse_state = WAIT_IP;
966 }
967 break;
968
969 case WAIT_SYNC:
970 D1(" W_S");
971 count = 0;
972 break;
973 default:
974 D1(" ");
975 count--;
976 break;
977 }
978 }
979
980 /* Recovery mechanism for WAIT_SYNC state. */
981 if (is_eop) {
982 if (odev->rx_parse_state == WAIT_SYNC) {
983 odev->rx_parse_state = WAIT_IP;
984 odev->rx_buf_size = 0;
985 odev->rx_buf_missing = sizeof(struct iphdr);
986 }
987 }
988 }
989
990 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
991 {
992 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
993 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
994
995 if (((rest == 5) || (rest == 6)) &&
996 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
997 crc_check, 4)) {
998 urb->actual_length -= 4;
999 }
1000 }
1001
1002 /* Moving data from usb to kernel (in interrupt state) */
1003 static void read_bulk_callback(struct urb *urb)
1004 {
1005 struct hso_net *odev = urb->context;
1006 struct net_device *net;
1007 int result;
1008 int status = urb->status;
1009
1010 /* is al ok? (Filip: Who's Al ?) */
1011 if (status) {
1012 handle_usb_error(status, __func__, odev->parent);
1013 return;
1014 }
1015
1016 /* Sanity check */
1017 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1018 D1("BULK IN callback but driver is not active!");
1019 return;
1020 }
1021 usb_mark_last_busy(urb->dev);
1022
1023 net = odev->net;
1024
1025 if (!netif_device_present(net)) {
1026 /* Somebody killed our network interface... */
1027 return;
1028 }
1029
1030 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1031 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1032
1033 /* do we even have a packet? */
1034 if (urb->actual_length) {
1035 /* Handle the IP stream, add header and push it onto network
1036 * stack if the packet is complete. */
1037 spin_lock(&odev->net_lock);
1038 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1039 (urb->transfer_buffer_length >
1040 urb->actual_length) ? 1 : 0);
1041 spin_unlock(&odev->net_lock);
1042 }
1043
1044 /* We are done with this URB, resubmit it. Prep the USB to wait for
1045 * another frame. Reuse same as received. */
1046 usb_fill_bulk_urb(urb,
1047 odev->parent->usb,
1048 usb_rcvbulkpipe(odev->parent->usb,
1049 odev->in_endp->
1050 bEndpointAddress & 0x7F),
1051 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1052 read_bulk_callback, odev);
1053
1054 /* Give this to the USB subsystem so it can tell us when more data
1055 * arrives. */
1056 result = usb_submit_urb(urb, GFP_ATOMIC);
1057 if (result)
1058 dev_warn(&odev->parent->interface->dev,
1059 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1060 result);
1061 }
1062
1063 /* Serial driver functions */
1064
1065 static void hso_init_termios(struct ktermios *termios)
1066 {
1067 /*
1068 * The default requirements for this device are:
1069 */
1070 termios->c_iflag &=
1071 ~(IGNBRK /* disable ignore break */
1072 | BRKINT /* disable break causes interrupt */
1073 | PARMRK /* disable mark parity errors */
1074 | ISTRIP /* disable clear high bit of input characters */
1075 | INLCR /* disable translate NL to CR */
1076 | IGNCR /* disable ignore CR */
1077 | ICRNL /* disable translate CR to NL */
1078 | IXON); /* disable enable XON/XOFF flow control */
1079
1080 /* disable postprocess output characters */
1081 termios->c_oflag &= ~OPOST;
1082
1083 termios->c_lflag &=
1084 ~(ECHO /* disable echo input characters */
1085 | ECHONL /* disable echo new line */
1086 | ICANON /* disable erase, kill, werase, and rprnt
1087 special characters */
1088 | ISIG /* disable interrupt, quit, and suspend special
1089 characters */
1090 | IEXTEN); /* disable non-POSIX special characters */
1091
1092 termios->c_cflag &=
1093 ~(CSIZE /* no size */
1094 | PARENB /* disable parity bit */
1095 | CBAUD /* clear current baud rate */
1096 | CBAUDEX); /* clear current buad rate */
1097
1098 termios->c_cflag |= CS8; /* character size 8 bits */
1099
1100 /* baud rate 115200 */
1101 tty_termios_encode_baud_rate(termios, 115200, 115200);
1102 }
1103
1104 static void _hso_serial_set_termios(struct tty_struct *tty,
1105 struct ktermios *old)
1106 {
1107 struct hso_serial *serial = tty->driver_data;
1108
1109 if (!serial) {
1110 printk(KERN_ERR "%s: no tty structures", __func__);
1111 return;
1112 }
1113
1114 D4("port %d", serial->minor);
1115
1116 /*
1117 * Fix up unsupported bits
1118 */
1119 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1120
1121 tty->termios.c_cflag &=
1122 ~(CSIZE /* no size */
1123 | PARENB /* disable parity bit */
1124 | CBAUD /* clear current baud rate */
1125 | CBAUDEX); /* clear current buad rate */
1126
1127 tty->termios.c_cflag |= CS8; /* character size 8 bits */
1128
1129 /* baud rate 115200 */
1130 tty_encode_baud_rate(tty, 115200, 115200);
1131 }
1132
1133 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1134 {
1135 int result;
1136 /* We are done with this URB, resubmit it. Prep the USB to wait for
1137 * another frame */
1138 usb_fill_bulk_urb(urb, serial->parent->usb,
1139 usb_rcvbulkpipe(serial->parent->usb,
1140 serial->in_endp->
1141 bEndpointAddress & 0x7F),
1142 urb->transfer_buffer, serial->rx_data_length,
1143 hso_std_serial_read_bulk_callback, serial);
1144 /* Give this to the USB subsystem so it can tell us when more data
1145 * arrives. */
1146 result = usb_submit_urb(urb, GFP_ATOMIC);
1147 if (result) {
1148 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1149 __func__, result);
1150 }
1151 }
1152
1153
1154
1155
1156 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1157 {
1158 int count;
1159 struct urb *curr_urb;
1160
1161 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1162 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1163 count = put_rxbuf_data(curr_urb, serial);
1164 if (count == -1)
1165 return;
1166 if (count == 0) {
1167 serial->curr_rx_urb_idx++;
1168 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1169 serial->curr_rx_urb_idx = 0;
1170 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1171 }
1172 }
1173 }
1174
1175 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1176 {
1177 int count = 0;
1178 struct urb *urb;
1179
1180 urb = serial->rx_urb[0];
1181 if (serial->port.count > 0) {
1182 count = put_rxbuf_data(urb, serial);
1183 if (count == -1)
1184 return;
1185 }
1186 /* Re issue a read as long as we receive data. */
1187
1188 if (count == 0 && ((urb->actual_length != 0) ||
1189 (serial->rx_state == RX_PENDING))) {
1190 serial->rx_state = RX_SENT;
1191 hso_mux_serial_read(serial);
1192 } else
1193 serial->rx_state = RX_IDLE;
1194 }
1195
1196
1197 /* read callback for Diag and CS port */
1198 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1199 {
1200 struct hso_serial *serial = urb->context;
1201 int status = urb->status;
1202
1203 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1204
1205 /* sanity check */
1206 if (!serial) {
1207 D1("serial == NULL");
1208 return;
1209 }
1210 if (status) {
1211 handle_usb_error(status, __func__, serial->parent);
1212 return;
1213 }
1214
1215 D1("Actual length = %d\n", urb->actual_length);
1216 DUMP1(urb->transfer_buffer, urb->actual_length);
1217
1218 /* Anyone listening? */
1219 if (serial->port.count == 0)
1220 return;
1221
1222 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1223 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1224 /* Valid data, handle RX data */
1225 spin_lock(&serial->serial_lock);
1226 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1227 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1228 spin_unlock(&serial->serial_lock);
1229 }
1230
1231 /*
1232 * This needs to be a tasklet otherwise we will
1233 * end up recursively calling this function.
1234 */
1235 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1236 {
1237 unsigned long flags;
1238
1239 spin_lock_irqsave(&serial->serial_lock, flags);
1240 if ((serial->parent->port_spec & HSO_INTF_MUX))
1241 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1242 else
1243 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1244 spin_unlock_irqrestore(&serial->serial_lock, flags);
1245 }
1246
1247 static void hso_unthrottle(struct tty_struct *tty)
1248 {
1249 struct hso_serial *serial = tty->driver_data;
1250
1251 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1252 }
1253
1254 /* open the requested serial port */
1255 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1256 {
1257 struct hso_serial *serial = get_serial_by_index(tty->index);
1258 int result;
1259
1260 /* sanity check */
1261 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1262 WARN_ON(1);
1263 tty->driver_data = NULL;
1264 D1("Failed to open port");
1265 return -ENODEV;
1266 }
1267
1268 mutex_lock(&serial->parent->mutex);
1269 result = usb_autopm_get_interface(serial->parent->interface);
1270 if (result < 0)
1271 goto err_out;
1272
1273 D1("Opening %d", serial->minor);
1274 kref_get(&serial->parent->ref);
1275
1276 /* setup */
1277 tty->driver_data = serial;
1278 tty_port_tty_set(&serial->port, tty);
1279
1280 /* check for port already opened, if not set the termios */
1281 serial->port.count++;
1282 if (serial->port.count == 1) {
1283 serial->rx_state = RX_IDLE;
1284 /* Force default termio settings */
1285 _hso_serial_set_termios(tty, NULL);
1286 tasklet_init(&serial->unthrottle_tasklet,
1287 (void (*)(unsigned long))hso_unthrottle_tasklet,
1288 (unsigned long)serial);
1289 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1290 if (result) {
1291 hso_stop_serial_device(serial->parent);
1292 serial->port.count--;
1293 kref_put(&serial->parent->ref, hso_serial_ref_free);
1294 }
1295 } else {
1296 D1("Port was already open");
1297 }
1298
1299 usb_autopm_put_interface(serial->parent->interface);
1300
1301 /* done */
1302 if (result)
1303 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1304 err_out:
1305 mutex_unlock(&serial->parent->mutex);
1306 return result;
1307 }
1308
1309 /* close the requested serial port */
1310 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1311 {
1312 struct hso_serial *serial = tty->driver_data;
1313 u8 usb_gone;
1314
1315 D1("Closing serial port");
1316
1317 /* Open failed, no close cleanup required */
1318 if (serial == NULL)
1319 return;
1320
1321 mutex_lock(&serial->parent->mutex);
1322 usb_gone = serial->parent->usb_gone;
1323
1324 if (!usb_gone)
1325 usb_autopm_get_interface(serial->parent->interface);
1326
1327 /* reset the rts and dtr */
1328 /* do the actual close */
1329 serial->port.count--;
1330
1331 if (serial->port.count <= 0) {
1332 serial->port.count = 0;
1333 tty_port_tty_set(&serial->port, NULL);
1334 if (!usb_gone)
1335 hso_stop_serial_device(serial->parent);
1336 tasklet_kill(&serial->unthrottle_tasklet);
1337 }
1338
1339 if (!usb_gone)
1340 usb_autopm_put_interface(serial->parent->interface);
1341
1342 mutex_unlock(&serial->parent->mutex);
1343
1344 kref_put(&serial->parent->ref, hso_serial_ref_free);
1345 }
1346
1347 /* close the requested serial port */
1348 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1349 int count)
1350 {
1351 struct hso_serial *serial = tty->driver_data;
1352 int space, tx_bytes;
1353 unsigned long flags;
1354
1355 /* sanity check */
1356 if (serial == NULL) {
1357 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1358 return -ENODEV;
1359 }
1360
1361 spin_lock_irqsave(&serial->serial_lock, flags);
1362
1363 space = serial->tx_data_length - serial->tx_buffer_count;
1364 tx_bytes = (count < space) ? count : space;
1365
1366 if (!tx_bytes)
1367 goto out;
1368
1369 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1370 serial->tx_buffer_count += tx_bytes;
1371
1372 out:
1373 spin_unlock_irqrestore(&serial->serial_lock, flags);
1374
1375 hso_kick_transmit(serial);
1376 /* done */
1377 return tx_bytes;
1378 }
1379
1380 /* how much room is there for writing */
1381 static int hso_serial_write_room(struct tty_struct *tty)
1382 {
1383 struct hso_serial *serial = tty->driver_data;
1384 int room;
1385 unsigned long flags;
1386
1387 spin_lock_irqsave(&serial->serial_lock, flags);
1388 room = serial->tx_data_length - serial->tx_buffer_count;
1389 spin_unlock_irqrestore(&serial->serial_lock, flags);
1390
1391 /* return free room */
1392 return room;
1393 }
1394
1395 /* setup the term */
1396 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1397 {
1398 struct hso_serial *serial = tty->driver_data;
1399 unsigned long flags;
1400
1401 if (old)
1402 D5("Termios called with: cflags new[%d] - old[%d]",
1403 tty->termios.c_cflag, old->c_cflag);
1404
1405 /* the actual setup */
1406 spin_lock_irqsave(&serial->serial_lock, flags);
1407 if (serial->port.count)
1408 _hso_serial_set_termios(tty, old);
1409 else
1410 tty->termios = *old;
1411 spin_unlock_irqrestore(&serial->serial_lock, flags);
1412
1413 /* done */
1414 }
1415
1416 /* how many characters in the buffer */
1417 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1418 {
1419 struct hso_serial *serial = tty->driver_data;
1420 int chars;
1421 unsigned long flags;
1422
1423 /* sanity check */
1424 if (serial == NULL)
1425 return 0;
1426
1427 spin_lock_irqsave(&serial->serial_lock, flags);
1428 chars = serial->tx_buffer_count;
1429 spin_unlock_irqrestore(&serial->serial_lock, flags);
1430
1431 return chars;
1432 }
1433 static int tiocmget_submit_urb(struct hso_serial *serial,
1434 struct hso_tiocmget *tiocmget,
1435 struct usb_device *usb)
1436 {
1437 int result;
1438
1439 if (serial->parent->usb_gone)
1440 return -ENODEV;
1441 usb_fill_int_urb(tiocmget->urb, usb,
1442 usb_rcvintpipe(usb,
1443 tiocmget->endp->
1444 bEndpointAddress & 0x7F),
1445 &tiocmget->serial_state_notification,
1446 sizeof(struct hso_serial_state_notification),
1447 tiocmget_intr_callback, serial,
1448 tiocmget->endp->bInterval);
1449 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1450 if (result) {
1451 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1452 result);
1453 }
1454 return result;
1455
1456 }
1457
1458 static void tiocmget_intr_callback(struct urb *urb)
1459 {
1460 struct hso_serial *serial = urb->context;
1461 struct hso_tiocmget *tiocmget;
1462 int status = urb->status;
1463 u16 UART_state_bitmap, prev_UART_state_bitmap;
1464 struct uart_icount *icount;
1465 struct hso_serial_state_notification *serial_state_notification;
1466 struct usb_device *usb;
1467 int if_num;
1468
1469 /* Sanity checks */
1470 if (!serial)
1471 return;
1472 if (status) {
1473 handle_usb_error(status, __func__, serial->parent);
1474 return;
1475 }
1476
1477 /* tiocmget is only supported on HSO_PORT_MODEM */
1478 tiocmget = serial->tiocmget;
1479 if (!tiocmget)
1480 return;
1481 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
1482
1483 usb = serial->parent->usb;
1484 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1485
1486 /* wIndex should be the USB interface number of the port to which the
1487 * notification applies, which should always be the Modem port.
1488 */
1489 serial_state_notification = &tiocmget->serial_state_notification;
1490 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1491 serial_state_notification->bNotification != B_NOTIFICATION ||
1492 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1493 le16_to_cpu(serial_state_notification->wIndex) != if_num ||
1494 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1495 dev_warn(&usb->dev,
1496 "hso received invalid serial state notification\n");
1497 DUMP(serial_state_notification,
1498 sizeof(struct hso_serial_state_notification));
1499 } else {
1500
1501 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1502 UART_state_bitmap);
1503 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1504 icount = &tiocmget->icount;
1505 spin_lock(&serial->serial_lock);
1506 if ((UART_state_bitmap & B_OVERRUN) !=
1507 (prev_UART_state_bitmap & B_OVERRUN))
1508 icount->parity++;
1509 if ((UART_state_bitmap & B_PARITY) !=
1510 (prev_UART_state_bitmap & B_PARITY))
1511 icount->parity++;
1512 if ((UART_state_bitmap & B_FRAMING) !=
1513 (prev_UART_state_bitmap & B_FRAMING))
1514 icount->frame++;
1515 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1516 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1517 icount->rng++;
1518 if ((UART_state_bitmap & B_BREAK) !=
1519 (prev_UART_state_bitmap & B_BREAK))
1520 icount->brk++;
1521 if ((UART_state_bitmap & B_TX_CARRIER) !=
1522 (prev_UART_state_bitmap & B_TX_CARRIER))
1523 icount->dsr++;
1524 if ((UART_state_bitmap & B_RX_CARRIER) !=
1525 (prev_UART_state_bitmap & B_RX_CARRIER))
1526 icount->dcd++;
1527 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1528 spin_unlock(&serial->serial_lock);
1529 tiocmget->intr_completed = 1;
1530 wake_up_interruptible(&tiocmget->waitq);
1531 }
1532 memset(serial_state_notification, 0,
1533 sizeof(struct hso_serial_state_notification));
1534 tiocmget_submit_urb(serial,
1535 tiocmget,
1536 serial->parent->usb);
1537 }
1538
1539 /*
1540 * next few functions largely stolen from drivers/serial/serial_core.c
1541 */
1542 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1543 * - mask passed in arg for lines of interest
1544 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1545 * Caller should use TIOCGICOUNT to see which one it was
1546 */
1547 static int
1548 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1549 {
1550 DECLARE_WAITQUEUE(wait, current);
1551 struct uart_icount cprev, cnow;
1552 struct hso_tiocmget *tiocmget;
1553 int ret;
1554
1555 tiocmget = serial->tiocmget;
1556 if (!tiocmget)
1557 return -ENOENT;
1558 /*
1559 * note the counters on entry
1560 */
1561 spin_lock_irq(&serial->serial_lock);
1562 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1563 spin_unlock_irq(&serial->serial_lock);
1564 add_wait_queue(&tiocmget->waitq, &wait);
1565 for (;;) {
1566 spin_lock_irq(&serial->serial_lock);
1567 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1568 spin_unlock_irq(&serial->serial_lock);
1569 set_current_state(TASK_INTERRUPTIBLE);
1570 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1571 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1572 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1573 ret = 0;
1574 break;
1575 }
1576 schedule();
1577 /* see if a signal did it */
1578 if (signal_pending(current)) {
1579 ret = -ERESTARTSYS;
1580 break;
1581 }
1582 cprev = cnow;
1583 }
1584 current->state = TASK_RUNNING;
1585 remove_wait_queue(&tiocmget->waitq, &wait);
1586
1587 return ret;
1588 }
1589
1590 /*
1591 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1592 * Return: write counters to the user passed counter struct
1593 * NB: both 1->0 and 0->1 transitions are counted except for
1594 * RI where only 0->1 is counted.
1595 */
1596 static int hso_get_count(struct tty_struct *tty,
1597 struct serial_icounter_struct *icount)
1598 {
1599 struct uart_icount cnow;
1600 struct hso_serial *serial = tty->driver_data;
1601 struct hso_tiocmget *tiocmget = serial->tiocmget;
1602
1603 memset(icount, 0, sizeof(struct serial_icounter_struct));
1604
1605 if (!tiocmget)
1606 return -ENOENT;
1607 spin_lock_irq(&serial->serial_lock);
1608 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1609 spin_unlock_irq(&serial->serial_lock);
1610
1611 icount->cts = cnow.cts;
1612 icount->dsr = cnow.dsr;
1613 icount->rng = cnow.rng;
1614 icount->dcd = cnow.dcd;
1615 icount->rx = cnow.rx;
1616 icount->tx = cnow.tx;
1617 icount->frame = cnow.frame;
1618 icount->overrun = cnow.overrun;
1619 icount->parity = cnow.parity;
1620 icount->brk = cnow.brk;
1621 icount->buf_overrun = cnow.buf_overrun;
1622
1623 return 0;
1624 }
1625
1626
1627 static int hso_serial_tiocmget(struct tty_struct *tty)
1628 {
1629 int retval;
1630 struct hso_serial *serial = tty->driver_data;
1631 struct hso_tiocmget *tiocmget;
1632 u16 UART_state_bitmap;
1633
1634 /* sanity check */
1635 if (!serial) {
1636 D1("no tty structures");
1637 return -EINVAL;
1638 }
1639 spin_lock_irq(&serial->serial_lock);
1640 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1641 ((serial->dtr_state) ? TIOCM_DTR : 0);
1642 tiocmget = serial->tiocmget;
1643 if (tiocmget) {
1644
1645 UART_state_bitmap = le16_to_cpu(
1646 tiocmget->prev_UART_state_bitmap);
1647 if (UART_state_bitmap & B_RING_SIGNAL)
1648 retval |= TIOCM_RNG;
1649 if (UART_state_bitmap & B_RX_CARRIER)
1650 retval |= TIOCM_CD;
1651 if (UART_state_bitmap & B_TX_CARRIER)
1652 retval |= TIOCM_DSR;
1653 }
1654 spin_unlock_irq(&serial->serial_lock);
1655 return retval;
1656 }
1657
1658 static int hso_serial_tiocmset(struct tty_struct *tty,
1659 unsigned int set, unsigned int clear)
1660 {
1661 int val = 0;
1662 unsigned long flags;
1663 int if_num;
1664 struct hso_serial *serial = tty->driver_data;
1665
1666 /* sanity check */
1667 if (!serial) {
1668 D1("no tty structures");
1669 return -EINVAL;
1670 }
1671
1672 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1673 return -EINVAL;
1674
1675 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1676
1677 spin_lock_irqsave(&serial->serial_lock, flags);
1678 if (set & TIOCM_RTS)
1679 serial->rts_state = 1;
1680 if (set & TIOCM_DTR)
1681 serial->dtr_state = 1;
1682
1683 if (clear & TIOCM_RTS)
1684 serial->rts_state = 0;
1685 if (clear & TIOCM_DTR)
1686 serial->dtr_state = 0;
1687
1688 if (serial->dtr_state)
1689 val |= 0x01;
1690 if (serial->rts_state)
1691 val |= 0x02;
1692
1693 spin_unlock_irqrestore(&serial->serial_lock, flags);
1694
1695 return usb_control_msg(serial->parent->usb,
1696 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1697 0x21, val, if_num, NULL, 0,
1698 USB_CTRL_SET_TIMEOUT);
1699 }
1700
1701 static int hso_serial_ioctl(struct tty_struct *tty,
1702 unsigned int cmd, unsigned long arg)
1703 {
1704 struct hso_serial *serial = tty->driver_data;
1705 int ret = 0;
1706 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1707
1708 if (!serial)
1709 return -ENODEV;
1710 switch (cmd) {
1711 case TIOCMIWAIT:
1712 ret = hso_wait_modem_status(serial, arg);
1713 break;
1714 default:
1715 ret = -ENOIOCTLCMD;
1716 break;
1717 }
1718 return ret;
1719 }
1720
1721
1722 /* starts a transmit */
1723 static void hso_kick_transmit(struct hso_serial *serial)
1724 {
1725 u8 *temp;
1726 unsigned long flags;
1727 int res;
1728
1729 spin_lock_irqsave(&serial->serial_lock, flags);
1730 if (!serial->tx_buffer_count)
1731 goto out;
1732
1733 if (serial->tx_urb_used)
1734 goto out;
1735
1736 /* Wakeup USB interface if necessary */
1737 if (hso_get_activity(serial->parent) == -EAGAIN)
1738 goto out;
1739
1740 /* Switch pointers around to avoid memcpy */
1741 temp = serial->tx_buffer;
1742 serial->tx_buffer = serial->tx_data;
1743 serial->tx_data = temp;
1744 serial->tx_data_count = serial->tx_buffer_count;
1745 serial->tx_buffer_count = 0;
1746
1747 /* If temp is set, it means we switched buffers */
1748 if (temp && serial->write_data) {
1749 res = serial->write_data(serial);
1750 if (res >= 0)
1751 serial->tx_urb_used = 1;
1752 }
1753 out:
1754 spin_unlock_irqrestore(&serial->serial_lock, flags);
1755 }
1756
1757 /* make a request (for reading and writing data to muxed serial port) */
1758 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1759 struct urb *ctrl_urb,
1760 struct usb_ctrlrequest *ctrl_req,
1761 u8 *ctrl_urb_data, u32 size)
1762 {
1763 int result;
1764 int pipe;
1765
1766 /* Sanity check */
1767 if (!serial || !ctrl_urb || !ctrl_req) {
1768 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1769 return -EINVAL;
1770 }
1771
1772 /* initialize */
1773 ctrl_req->wValue = 0;
1774 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1775 ctrl_req->wLength = cpu_to_le16(size);
1776
1777 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1778 /* Reading command */
1779 ctrl_req->bRequestType = USB_DIR_IN |
1780 USB_TYPE_OPTION_VENDOR |
1781 USB_RECIP_INTERFACE;
1782 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1783 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1784 } else {
1785 /* Writing command */
1786 ctrl_req->bRequestType = USB_DIR_OUT |
1787 USB_TYPE_OPTION_VENDOR |
1788 USB_RECIP_INTERFACE;
1789 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1790 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1791 }
1792 /* syslog */
1793 D2("%s command (%02x) len: %d, port: %d",
1794 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1795 ctrl_req->bRequestType, ctrl_req->wLength, port);
1796
1797 /* Load ctrl urb */
1798 ctrl_urb->transfer_flags = 0;
1799 usb_fill_control_urb(ctrl_urb,
1800 serial->parent->usb,
1801 pipe,
1802 (u8 *) ctrl_req,
1803 ctrl_urb_data, size, ctrl_callback, serial);
1804 /* Send it on merry way */
1805 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1806 if (result) {
1807 dev_err(&ctrl_urb->dev->dev,
1808 "%s failed submit ctrl_urb %d type %d\n", __func__,
1809 result, type);
1810 return result;
1811 }
1812
1813 /* done */
1814 return size;
1815 }
1816
1817 /* called by intr_callback when read occurs */
1818 static int hso_mux_serial_read(struct hso_serial *serial)
1819 {
1820 if (!serial)
1821 return -EINVAL;
1822
1823 /* clean data */
1824 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1825 /* make the request */
1826
1827 if (serial->num_rx_urbs != 1) {
1828 dev_err(&serial->parent->interface->dev,
1829 "ERROR: mux'd reads with multiple buffers "
1830 "not possible\n");
1831 return 0;
1832 }
1833 return mux_device_request(serial,
1834 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1835 serial->parent->port_spec & HSO_PORT_MASK,
1836 serial->rx_urb[0],
1837 &serial->ctrl_req_rx,
1838 serial->rx_data[0], serial->rx_data_length);
1839 }
1840
1841 /* used for muxed serial port callback (muxed serial read) */
1842 static void intr_callback(struct urb *urb)
1843 {
1844 struct hso_shared_int *shared_int = urb->context;
1845 struct hso_serial *serial;
1846 unsigned char *port_req;
1847 int status = urb->status;
1848 int i;
1849
1850 usb_mark_last_busy(urb->dev);
1851
1852 /* sanity check */
1853 if (!shared_int)
1854 return;
1855
1856 /* status check */
1857 if (status) {
1858 handle_usb_error(status, __func__, NULL);
1859 return;
1860 }
1861 D4("\n--- Got intr callback 0x%02X ---", status);
1862
1863 /* what request? */
1864 port_req = urb->transfer_buffer;
1865 D4(" port_req = 0x%.2X\n", *port_req);
1866 /* loop over all muxed ports to find the one sending this */
1867 for (i = 0; i < 8; i++) {
1868 /* max 8 channels on MUX */
1869 if (*port_req & (1 << i)) {
1870 serial = get_serial_by_shared_int_and_type(shared_int,
1871 (1 << i));
1872 if (serial != NULL) {
1873 D1("Pending read interrupt on port %d\n", i);
1874 spin_lock(&serial->serial_lock);
1875 if (serial->rx_state == RX_IDLE &&
1876 serial->port.count > 0) {
1877 /* Setup and send a ctrl req read on
1878 * port i */
1879 if (!serial->rx_urb_filled[0]) {
1880 serial->rx_state = RX_SENT;
1881 hso_mux_serial_read(serial);
1882 } else
1883 serial->rx_state = RX_PENDING;
1884 } else {
1885 D1("Already a read pending on "
1886 "port %d or port not open\n", i);
1887 }
1888 spin_unlock(&serial->serial_lock);
1889 }
1890 }
1891 }
1892 /* Resubmit interrupt urb */
1893 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1894 }
1895
1896 /* called for writing to muxed serial port */
1897 static int hso_mux_serial_write_data(struct hso_serial *serial)
1898 {
1899 if (NULL == serial)
1900 return -EINVAL;
1901
1902 return mux_device_request(serial,
1903 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1904 serial->parent->port_spec & HSO_PORT_MASK,
1905 serial->tx_urb,
1906 &serial->ctrl_req_tx,
1907 serial->tx_data, serial->tx_data_count);
1908 }
1909
1910 /* write callback for Diag and CS port */
1911 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1912 {
1913 struct hso_serial *serial = urb->context;
1914 int status = urb->status;
1915
1916 /* sanity check */
1917 if (!serial) {
1918 D1("serial == NULL");
1919 return;
1920 }
1921
1922 spin_lock(&serial->serial_lock);
1923 serial->tx_urb_used = 0;
1924 spin_unlock(&serial->serial_lock);
1925 if (status) {
1926 handle_usb_error(status, __func__, serial->parent);
1927 return;
1928 }
1929 hso_put_activity(serial->parent);
1930 tty_port_tty_wakeup(&serial->port);
1931 hso_kick_transmit(serial);
1932
1933 D1(" ");
1934 }
1935
1936 /* called for writing diag or CS serial port */
1937 static int hso_std_serial_write_data(struct hso_serial *serial)
1938 {
1939 int count = serial->tx_data_count;
1940 int result;
1941
1942 usb_fill_bulk_urb(serial->tx_urb,
1943 serial->parent->usb,
1944 usb_sndbulkpipe(serial->parent->usb,
1945 serial->out_endp->
1946 bEndpointAddress & 0x7F),
1947 serial->tx_data, serial->tx_data_count,
1948 hso_std_serial_write_bulk_callback, serial);
1949
1950 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1951 if (result) {
1952 dev_warn(&serial->parent->usb->dev,
1953 "Failed to submit urb - res %d\n", result);
1954 return result;
1955 }
1956
1957 return count;
1958 }
1959
1960 /* callback after read or write on muxed serial port */
1961 static void ctrl_callback(struct urb *urb)
1962 {
1963 struct hso_serial *serial = urb->context;
1964 struct usb_ctrlrequest *req;
1965 int status = urb->status;
1966
1967 /* sanity check */
1968 if (!serial)
1969 return;
1970
1971 spin_lock(&serial->serial_lock);
1972 serial->tx_urb_used = 0;
1973 spin_unlock(&serial->serial_lock);
1974 if (status) {
1975 handle_usb_error(status, __func__, serial->parent);
1976 return;
1977 }
1978
1979 /* what request? */
1980 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1981 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
1982 D4("Actual length of urb = %d\n", urb->actual_length);
1983 DUMP1(urb->transfer_buffer, urb->actual_length);
1984
1985 if (req->bRequestType ==
1986 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
1987 /* response to a read command */
1988 serial->rx_urb_filled[0] = 1;
1989 spin_lock(&serial->serial_lock);
1990 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1991 spin_unlock(&serial->serial_lock);
1992 } else {
1993 hso_put_activity(serial->parent);
1994 tty_port_tty_wakeup(&serial->port);
1995 /* response to a write command */
1996 hso_kick_transmit(serial);
1997 }
1998 }
1999
2000 /* handle RX data for serial port */
2001 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2002 {
2003 struct tty_struct *tty;
2004 int count;
2005
2006 /* Sanity check */
2007 if (urb == NULL || serial == NULL) {
2008 D1("serial = NULL");
2009 return -2;
2010 }
2011
2012 tty = tty_port_tty_get(&serial->port);
2013
2014 if (tty && test_bit(TTY_THROTTLED, &tty->flags)) {
2015 tty_kref_put(tty);
2016 return -1;
2017 }
2018
2019 /* Push data to tty */
2020 D1("data to push to tty");
2021 count = tty_buffer_request_room(&serial->port, urb->actual_length);
2022 if (count >= urb->actual_length) {
2023 tty_insert_flip_string(&serial->port, urb->transfer_buffer,
2024 urb->actual_length);
2025 tty_flip_buffer_push(&serial->port);
2026 } else {
2027 dev_warn(&serial->parent->usb->dev,
2028 "dropping data, %d bytes lost\n", urb->actual_length);
2029 }
2030
2031 tty_kref_put(tty);
2032
2033 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2034
2035 return 0;
2036 }
2037
2038
2039 /* Base driver functions */
2040
2041 static void hso_log_port(struct hso_device *hso_dev)
2042 {
2043 char *port_type;
2044 char port_dev[20];
2045
2046 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2047 case HSO_PORT_CONTROL:
2048 port_type = "Control";
2049 break;
2050 case HSO_PORT_APP:
2051 port_type = "Application";
2052 break;
2053 case HSO_PORT_GPS:
2054 port_type = "GPS";
2055 break;
2056 case HSO_PORT_GPS_CONTROL:
2057 port_type = "GPS control";
2058 break;
2059 case HSO_PORT_APP2:
2060 port_type = "Application2";
2061 break;
2062 case HSO_PORT_PCSC:
2063 port_type = "PCSC";
2064 break;
2065 case HSO_PORT_DIAG:
2066 port_type = "Diagnostic";
2067 break;
2068 case HSO_PORT_DIAG2:
2069 port_type = "Diagnostic2";
2070 break;
2071 case HSO_PORT_MODEM:
2072 port_type = "Modem";
2073 break;
2074 case HSO_PORT_NETWORK:
2075 port_type = "Network";
2076 break;
2077 default:
2078 port_type = "Unknown";
2079 break;
2080 }
2081 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2082 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2083 } else
2084 sprintf(port_dev, "/dev/%s%d", tty_filename,
2085 dev2ser(hso_dev)->minor);
2086
2087 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2088 port_type, port_dev);
2089 }
2090
2091 static int hso_start_net_device(struct hso_device *hso_dev)
2092 {
2093 int i, result = 0;
2094 struct hso_net *hso_net = dev2net(hso_dev);
2095
2096 if (!hso_net)
2097 return -ENODEV;
2098
2099 /* send URBs for all read buffers */
2100 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2101
2102 /* Prep a receive URB */
2103 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2104 hso_dev->usb,
2105 usb_rcvbulkpipe(hso_dev->usb,
2106 hso_net->in_endp->
2107 bEndpointAddress & 0x7F),
2108 hso_net->mux_bulk_rx_buf_pool[i],
2109 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2110 hso_net);
2111
2112 /* Put it out there so the device can send us stuff */
2113 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2114 GFP_NOIO);
2115 if (result)
2116 dev_warn(&hso_dev->usb->dev,
2117 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2118 i, result);
2119 }
2120
2121 return result;
2122 }
2123
2124 static int hso_stop_net_device(struct hso_device *hso_dev)
2125 {
2126 int i;
2127 struct hso_net *hso_net = dev2net(hso_dev);
2128
2129 if (!hso_net)
2130 return -ENODEV;
2131
2132 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2133 if (hso_net->mux_bulk_rx_urb_pool[i])
2134 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2135
2136 }
2137 if (hso_net->mux_bulk_tx_urb)
2138 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2139
2140 return 0;
2141 }
2142
2143 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2144 {
2145 int i, result = 0;
2146 struct hso_serial *serial = dev2ser(hso_dev);
2147
2148 if (!serial)
2149 return -ENODEV;
2150
2151 /* If it is not the MUX port fill in and submit a bulk urb (already
2152 * allocated in hso_serial_start) */
2153 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2154 for (i = 0; i < serial->num_rx_urbs; i++) {
2155 usb_fill_bulk_urb(serial->rx_urb[i],
2156 serial->parent->usb,
2157 usb_rcvbulkpipe(serial->parent->usb,
2158 serial->in_endp->
2159 bEndpointAddress &
2160 0x7F),
2161 serial->rx_data[i],
2162 serial->rx_data_length,
2163 hso_std_serial_read_bulk_callback,
2164 serial);
2165 result = usb_submit_urb(serial->rx_urb[i], flags);
2166 if (result) {
2167 dev_warn(&serial->parent->usb->dev,
2168 "Failed to submit urb - res %d\n",
2169 result);
2170 break;
2171 }
2172 }
2173 } else {
2174 mutex_lock(&serial->shared_int->shared_int_lock);
2175 if (!serial->shared_int->use_count) {
2176 result =
2177 hso_mux_submit_intr_urb(serial->shared_int,
2178 hso_dev->usb, flags);
2179 }
2180 serial->shared_int->use_count++;
2181 mutex_unlock(&serial->shared_int->shared_int_lock);
2182 }
2183 if (serial->tiocmget)
2184 tiocmget_submit_urb(serial,
2185 serial->tiocmget,
2186 serial->parent->usb);
2187 return result;
2188 }
2189
2190 static int hso_stop_serial_device(struct hso_device *hso_dev)
2191 {
2192 int i;
2193 struct hso_serial *serial = dev2ser(hso_dev);
2194 struct hso_tiocmget *tiocmget;
2195
2196 if (!serial)
2197 return -ENODEV;
2198
2199 for (i = 0; i < serial->num_rx_urbs; i++) {
2200 if (serial->rx_urb[i]) {
2201 usb_kill_urb(serial->rx_urb[i]);
2202 serial->rx_urb_filled[i] = 0;
2203 }
2204 }
2205 serial->curr_rx_urb_idx = 0;
2206
2207 if (serial->tx_urb)
2208 usb_kill_urb(serial->tx_urb);
2209
2210 if (serial->shared_int) {
2211 mutex_lock(&serial->shared_int->shared_int_lock);
2212 if (serial->shared_int->use_count &&
2213 (--serial->shared_int->use_count == 0)) {
2214 struct urb *urb;
2215
2216 urb = serial->shared_int->shared_intr_urb;
2217 if (urb)
2218 usb_kill_urb(urb);
2219 }
2220 mutex_unlock(&serial->shared_int->shared_int_lock);
2221 }
2222 tiocmget = serial->tiocmget;
2223 if (tiocmget) {
2224 wake_up_interruptible(&tiocmget->waitq);
2225 usb_kill_urb(tiocmget->urb);
2226 }
2227
2228 return 0;
2229 }
2230
2231 static void hso_serial_common_free(struct hso_serial *serial)
2232 {
2233 int i;
2234
2235 if (serial->parent->dev)
2236 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2237
2238 tty_unregister_device(tty_drv, serial->minor);
2239
2240 for (i = 0; i < serial->num_rx_urbs; i++) {
2241 /* unlink and free RX URB */
2242 usb_free_urb(serial->rx_urb[i]);
2243 /* free the RX buffer */
2244 kfree(serial->rx_data[i]);
2245 }
2246
2247 /* unlink and free TX URB */
2248 usb_free_urb(serial->tx_urb);
2249 kfree(serial->tx_data);
2250 tty_port_destroy(&serial->port);
2251 }
2252
2253 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2254 int rx_size, int tx_size)
2255 {
2256 struct device *dev;
2257 int minor;
2258 int i;
2259
2260 tty_port_init(&serial->port);
2261
2262 minor = get_free_serial_index();
2263 if (minor < 0)
2264 goto exit;
2265
2266 /* register our minor number */
2267 serial->parent->dev = tty_port_register_device(&serial->port, tty_drv,
2268 minor, &serial->parent->interface->dev);
2269 dev = serial->parent->dev;
2270 dev_set_drvdata(dev, serial->parent);
2271 i = device_create_file(dev, &dev_attr_hsotype);
2272
2273 /* fill in specific data for later use */
2274 serial->minor = minor;
2275 serial->magic = HSO_SERIAL_MAGIC;
2276 spin_lock_init(&serial->serial_lock);
2277 serial->num_rx_urbs = num_urbs;
2278
2279 /* RX, allocate urb and initialize */
2280
2281 /* prepare our RX buffer */
2282 serial->rx_data_length = rx_size;
2283 for (i = 0; i < serial->num_rx_urbs; i++) {
2284 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2285 if (!serial->rx_urb[i]) {
2286 dev_err(dev, "Could not allocate urb?\n");
2287 goto exit;
2288 }
2289 serial->rx_urb[i]->transfer_buffer = NULL;
2290 serial->rx_urb[i]->transfer_buffer_length = 0;
2291 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2292 GFP_KERNEL);
2293 if (!serial->rx_data[i])
2294 goto exit;
2295 }
2296
2297 /* TX, allocate urb and initialize */
2298 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2299 if (!serial->tx_urb) {
2300 dev_err(dev, "Could not allocate urb?\n");
2301 goto exit;
2302 }
2303 serial->tx_urb->transfer_buffer = NULL;
2304 serial->tx_urb->transfer_buffer_length = 0;
2305 /* prepare our TX buffer */
2306 serial->tx_data_count = 0;
2307 serial->tx_buffer_count = 0;
2308 serial->tx_data_length = tx_size;
2309 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2310 if (!serial->tx_data)
2311 goto exit;
2312
2313 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2314 if (!serial->tx_buffer)
2315 goto exit;
2316
2317 return 0;
2318 exit:
2319 hso_serial_common_free(serial);
2320 return -1;
2321 }
2322
2323 /* Creates a general hso device */
2324 static struct hso_device *hso_create_device(struct usb_interface *intf,
2325 int port_spec)
2326 {
2327 struct hso_device *hso_dev;
2328
2329 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2330 if (!hso_dev)
2331 return NULL;
2332
2333 hso_dev->port_spec = port_spec;
2334 hso_dev->usb = interface_to_usbdev(intf);
2335 hso_dev->interface = intf;
2336 kref_init(&hso_dev->ref);
2337 mutex_init(&hso_dev->mutex);
2338
2339 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2340 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2341 INIT_WORK(&hso_dev->reset_device, reset_device);
2342
2343 return hso_dev;
2344 }
2345
2346 /* Removes a network device in the network device table */
2347 static int remove_net_device(struct hso_device *hso_dev)
2348 {
2349 int i;
2350
2351 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2352 if (network_table[i] == hso_dev) {
2353 network_table[i] = NULL;
2354 break;
2355 }
2356 }
2357 if (i == HSO_MAX_NET_DEVICES)
2358 return -1;
2359 return 0;
2360 }
2361
2362 /* Frees our network device */
2363 static void hso_free_net_device(struct hso_device *hso_dev)
2364 {
2365 int i;
2366 struct hso_net *hso_net = dev2net(hso_dev);
2367
2368 if (!hso_net)
2369 return;
2370
2371 remove_net_device(hso_net->parent);
2372
2373 if (hso_net->net)
2374 unregister_netdev(hso_net->net);
2375
2376 /* start freeing */
2377 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2378 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2379 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2380 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2381 }
2382 usb_free_urb(hso_net->mux_bulk_tx_urb);
2383 kfree(hso_net->mux_bulk_tx_buf);
2384 hso_net->mux_bulk_tx_buf = NULL;
2385
2386 if (hso_net->net)
2387 free_netdev(hso_net->net);
2388
2389 kfree(hso_dev);
2390 }
2391
2392 static const struct net_device_ops hso_netdev_ops = {
2393 .ndo_open = hso_net_open,
2394 .ndo_stop = hso_net_close,
2395 .ndo_start_xmit = hso_net_start_xmit,
2396 .ndo_tx_timeout = hso_net_tx_timeout,
2397 };
2398
2399 /* initialize the network interface */
2400 static void hso_net_init(struct net_device *net)
2401 {
2402 struct hso_net *hso_net = netdev_priv(net);
2403
2404 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2405
2406 /* fill in the other fields */
2407 net->netdev_ops = &hso_netdev_ops;
2408 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2409 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2410 net->type = ARPHRD_NONE;
2411 net->mtu = DEFAULT_MTU - 14;
2412 net->tx_queue_len = 10;
2413 net->ethtool_ops = &ops;
2414
2415 /* and initialize the semaphore */
2416 spin_lock_init(&hso_net->net_lock);
2417 }
2418
2419 /* Adds a network device in the network device table */
2420 static int add_net_device(struct hso_device *hso_dev)
2421 {
2422 int i;
2423
2424 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2425 if (network_table[i] == NULL) {
2426 network_table[i] = hso_dev;
2427 break;
2428 }
2429 }
2430 if (i == HSO_MAX_NET_DEVICES)
2431 return -1;
2432 return 0;
2433 }
2434
2435 static int hso_rfkill_set_block(void *data, bool blocked)
2436 {
2437 struct hso_device *hso_dev = data;
2438 int enabled = !blocked;
2439 int rv;
2440
2441 mutex_lock(&hso_dev->mutex);
2442 if (hso_dev->usb_gone)
2443 rv = 0;
2444 else
2445 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2446 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2447 USB_CTRL_SET_TIMEOUT);
2448 mutex_unlock(&hso_dev->mutex);
2449 return rv;
2450 }
2451
2452 static const struct rfkill_ops hso_rfkill_ops = {
2453 .set_block = hso_rfkill_set_block,
2454 };
2455
2456 /* Creates and sets up everything for rfkill */
2457 static void hso_create_rfkill(struct hso_device *hso_dev,
2458 struct usb_interface *interface)
2459 {
2460 struct hso_net *hso_net = dev2net(hso_dev);
2461 struct device *dev = &hso_net->net->dev;
2462 char *rfkn;
2463
2464 rfkn = kzalloc(20, GFP_KERNEL);
2465 if (!rfkn)
2466 dev_err(dev, "%s - Out of memory\n", __func__);
2467
2468 snprintf(rfkn, 20, "hso-%d",
2469 interface->altsetting->desc.bInterfaceNumber);
2470
2471 hso_net->rfkill = rfkill_alloc(rfkn,
2472 &interface_to_usbdev(interface)->dev,
2473 RFKILL_TYPE_WWAN,
2474 &hso_rfkill_ops, hso_dev);
2475 if (!hso_net->rfkill) {
2476 dev_err(dev, "%s - Out of memory\n", __func__);
2477 kfree(rfkn);
2478 return;
2479 }
2480 if (rfkill_register(hso_net->rfkill) < 0) {
2481 rfkill_destroy(hso_net->rfkill);
2482 kfree(rfkn);
2483 hso_net->rfkill = NULL;
2484 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2485 return;
2486 }
2487 }
2488
2489 static struct device_type hso_type = {
2490 .name = "wwan",
2491 };
2492
2493 /* Creates our network device */
2494 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2495 int port_spec)
2496 {
2497 int result, i;
2498 struct net_device *net;
2499 struct hso_net *hso_net;
2500 struct hso_device *hso_dev;
2501
2502 hso_dev = hso_create_device(interface, port_spec);
2503 if (!hso_dev)
2504 return NULL;
2505
2506 /* allocate our network device, then we can put in our private data */
2507 /* call hso_net_init to do the basic initialization */
2508 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN,
2509 hso_net_init);
2510 if (!net) {
2511 dev_err(&interface->dev, "Unable to create ethernet device\n");
2512 goto exit;
2513 }
2514
2515 hso_net = netdev_priv(net);
2516
2517 hso_dev->port_data.dev_net = hso_net;
2518 hso_net->net = net;
2519 hso_net->parent = hso_dev;
2520
2521 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2522 USB_DIR_IN);
2523 if (!hso_net->in_endp) {
2524 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2525 goto exit;
2526 }
2527 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2528 USB_DIR_OUT);
2529 if (!hso_net->out_endp) {
2530 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2531 goto exit;
2532 }
2533 SET_NETDEV_DEV(net, &interface->dev);
2534 SET_NETDEV_DEVTYPE(net, &hso_type);
2535
2536 /* registering our net device */
2537 result = register_netdev(net);
2538 if (result) {
2539 dev_err(&interface->dev, "Failed to register device\n");
2540 goto exit;
2541 }
2542
2543 /* start allocating */
2544 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2545 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2546 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2547 dev_err(&interface->dev, "Could not allocate rx urb\n");
2548 goto exit;
2549 }
2550 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2551 GFP_KERNEL);
2552 if (!hso_net->mux_bulk_rx_buf_pool[i])
2553 goto exit;
2554 }
2555 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2556 if (!hso_net->mux_bulk_tx_urb) {
2557 dev_err(&interface->dev, "Could not allocate tx urb\n");
2558 goto exit;
2559 }
2560 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2561 if (!hso_net->mux_bulk_tx_buf)
2562 goto exit;
2563
2564 add_net_device(hso_dev);
2565
2566 hso_log_port(hso_dev);
2567
2568 hso_create_rfkill(hso_dev, interface);
2569
2570 return hso_dev;
2571 exit:
2572 hso_free_net_device(hso_dev);
2573 return NULL;
2574 }
2575
2576 static void hso_free_tiomget(struct hso_serial *serial)
2577 {
2578 struct hso_tiocmget *tiocmget;
2579 if (!serial)
2580 return;
2581 tiocmget = serial->tiocmget;
2582 if (tiocmget) {
2583 usb_free_urb(tiocmget->urb);
2584 tiocmget->urb = NULL;
2585 serial->tiocmget = NULL;
2586 kfree(tiocmget);
2587 }
2588 }
2589
2590 /* Frees an AT channel ( goes for both mux and non-mux ) */
2591 static void hso_free_serial_device(struct hso_device *hso_dev)
2592 {
2593 struct hso_serial *serial = dev2ser(hso_dev);
2594
2595 if (!serial)
2596 return;
2597 set_serial_by_index(serial->minor, NULL);
2598
2599 hso_serial_common_free(serial);
2600
2601 if (serial->shared_int) {
2602 mutex_lock(&serial->shared_int->shared_int_lock);
2603 if (--serial->shared_int->ref_count == 0)
2604 hso_free_shared_int(serial->shared_int);
2605 else
2606 mutex_unlock(&serial->shared_int->shared_int_lock);
2607 }
2608 hso_free_tiomget(serial);
2609 kfree(serial);
2610 kfree(hso_dev);
2611 }
2612
2613 /* Creates a bulk AT channel */
2614 static struct hso_device *hso_create_bulk_serial_device(
2615 struct usb_interface *interface, int port)
2616 {
2617 struct hso_device *hso_dev;
2618 struct hso_serial *serial;
2619 int num_urbs;
2620 struct hso_tiocmget *tiocmget;
2621
2622 hso_dev = hso_create_device(interface, port);
2623 if (!hso_dev)
2624 return NULL;
2625
2626 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2627 if (!serial)
2628 goto exit;
2629
2630 serial->parent = hso_dev;
2631 hso_dev->port_data.dev_serial = serial;
2632
2633 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2634 num_urbs = 2;
2635 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2636 GFP_KERNEL);
2637 /* it isn't going to break our heart if serial->tiocmget
2638 * allocation fails don't bother checking this.
2639 */
2640 if (serial->tiocmget) {
2641 tiocmget = serial->tiocmget;
2642 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2643 if (tiocmget->urb) {
2644 mutex_init(&tiocmget->mutex);
2645 init_waitqueue_head(&tiocmget->waitq);
2646 tiocmget->endp = hso_get_ep(
2647 interface,
2648 USB_ENDPOINT_XFER_INT,
2649 USB_DIR_IN);
2650 } else
2651 hso_free_tiomget(serial);
2652 }
2653 }
2654 else
2655 num_urbs = 1;
2656
2657 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2658 BULK_URB_TX_SIZE))
2659 goto exit;
2660
2661 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2662 USB_DIR_IN);
2663 if (!serial->in_endp) {
2664 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2665 goto exit2;
2666 }
2667
2668 if (!
2669 (serial->out_endp =
2670 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2671 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2672 goto exit2;
2673 }
2674
2675 serial->write_data = hso_std_serial_write_data;
2676
2677 /* and record this serial */
2678 set_serial_by_index(serial->minor, serial);
2679
2680 /* setup the proc dirs and files if needed */
2681 hso_log_port(hso_dev);
2682
2683 /* done, return it */
2684 return hso_dev;
2685
2686 exit2:
2687 hso_serial_common_free(serial);
2688 exit:
2689 hso_free_tiomget(serial);
2690 kfree(serial);
2691 kfree(hso_dev);
2692 return NULL;
2693 }
2694
2695 /* Creates a multiplexed AT channel */
2696 static
2697 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2698 int port,
2699 struct hso_shared_int *mux)
2700 {
2701 struct hso_device *hso_dev;
2702 struct hso_serial *serial;
2703 int port_spec;
2704
2705 port_spec = HSO_INTF_MUX;
2706 port_spec &= ~HSO_PORT_MASK;
2707
2708 port_spec |= hso_mux_to_port(port);
2709 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2710 return NULL;
2711
2712 hso_dev = hso_create_device(interface, port_spec);
2713 if (!hso_dev)
2714 return NULL;
2715
2716 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2717 if (!serial)
2718 goto exit;
2719
2720 hso_dev->port_data.dev_serial = serial;
2721 serial->parent = hso_dev;
2722
2723 if (hso_serial_common_create
2724 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2725 goto exit;
2726
2727 serial->tx_data_length--;
2728 serial->write_data = hso_mux_serial_write_data;
2729
2730 serial->shared_int = mux;
2731 mutex_lock(&serial->shared_int->shared_int_lock);
2732 serial->shared_int->ref_count++;
2733 mutex_unlock(&serial->shared_int->shared_int_lock);
2734
2735 /* and record this serial */
2736 set_serial_by_index(serial->minor, serial);
2737
2738 /* setup the proc dirs and files if needed */
2739 hso_log_port(hso_dev);
2740
2741 /* done, return it */
2742 return hso_dev;
2743
2744 exit:
2745 if (serial) {
2746 tty_unregister_device(tty_drv, serial->minor);
2747 kfree(serial);
2748 }
2749 kfree(hso_dev);
2750 return NULL;
2751
2752 }
2753
2754 static void hso_free_shared_int(struct hso_shared_int *mux)
2755 {
2756 usb_free_urb(mux->shared_intr_urb);
2757 kfree(mux->shared_intr_buf);
2758 mutex_unlock(&mux->shared_int_lock);
2759 kfree(mux);
2760 }
2761
2762 static
2763 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2764 {
2765 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2766
2767 if (!mux)
2768 return NULL;
2769
2770 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2771 USB_DIR_IN);
2772 if (!mux->intr_endp) {
2773 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2774 goto exit;
2775 }
2776
2777 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2778 if (!mux->shared_intr_urb) {
2779 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2780 goto exit;
2781 }
2782 mux->shared_intr_buf =
2783 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2784 GFP_KERNEL);
2785 if (!mux->shared_intr_buf)
2786 goto exit;
2787
2788 mutex_init(&mux->shared_int_lock);
2789
2790 return mux;
2791
2792 exit:
2793 kfree(mux->shared_intr_buf);
2794 usb_free_urb(mux->shared_intr_urb);
2795 kfree(mux);
2796 return NULL;
2797 }
2798
2799 /* Gets the port spec for a certain interface */
2800 static int hso_get_config_data(struct usb_interface *interface)
2801 {
2802 struct usb_device *usbdev = interface_to_usbdev(interface);
2803 u8 *config_data = kmalloc(17, GFP_KERNEL);
2804 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2805 s32 result;
2806
2807 if (!config_data)
2808 return -ENOMEM;
2809 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2810 0x86, 0xC0, 0, 0, config_data, 17,
2811 USB_CTRL_SET_TIMEOUT) != 0x11) {
2812 kfree(config_data);
2813 return -EIO;
2814 }
2815
2816 switch (config_data[if_num]) {
2817 case 0x0:
2818 result = 0;
2819 break;
2820 case 0x1:
2821 result = HSO_PORT_DIAG;
2822 break;
2823 case 0x2:
2824 result = HSO_PORT_GPS;
2825 break;
2826 case 0x3:
2827 result = HSO_PORT_GPS_CONTROL;
2828 break;
2829 case 0x4:
2830 result = HSO_PORT_APP;
2831 break;
2832 case 0x5:
2833 result = HSO_PORT_APP2;
2834 break;
2835 case 0x6:
2836 result = HSO_PORT_CONTROL;
2837 break;
2838 case 0x7:
2839 result = HSO_PORT_NETWORK;
2840 break;
2841 case 0x8:
2842 result = HSO_PORT_MODEM;
2843 break;
2844 case 0x9:
2845 result = HSO_PORT_MSD;
2846 break;
2847 case 0xa:
2848 result = HSO_PORT_PCSC;
2849 break;
2850 case 0xb:
2851 result = HSO_PORT_VOICE;
2852 break;
2853 default:
2854 result = 0;
2855 }
2856
2857 if (result)
2858 result |= HSO_INTF_BULK;
2859
2860 if (config_data[16] & 0x1)
2861 result |= HSO_INFO_CRC_BUG;
2862
2863 kfree(config_data);
2864 return result;
2865 }
2866
2867 /* called once for each interface upon device insertion */
2868 static int hso_probe(struct usb_interface *interface,
2869 const struct usb_device_id *id)
2870 {
2871 int mux, i, if_num, port_spec;
2872 unsigned char port_mask;
2873 struct hso_device *hso_dev = NULL;
2874 struct hso_shared_int *shared_int;
2875 struct hso_device *tmp_dev = NULL;
2876
2877 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2878 dev_err(&interface->dev, "Not our interface\n");
2879 return -ENODEV;
2880 }
2881
2882 if_num = interface->altsetting->desc.bInterfaceNumber;
2883
2884 /* Get the interface/port specification from either driver_info or from
2885 * the device itself */
2886 if (id->driver_info)
2887 port_spec = ((u32 *)(id->driver_info))[if_num];
2888 else
2889 port_spec = hso_get_config_data(interface);
2890
2891 /* Check if we need to switch to alt interfaces prior to port
2892 * configuration */
2893 if (interface->num_altsetting > 1)
2894 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2895 interface->needs_remote_wakeup = 1;
2896
2897 /* Allocate new hso device(s) */
2898 switch (port_spec & HSO_INTF_MASK) {
2899 case HSO_INTF_MUX:
2900 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2901 /* Create the network device */
2902 if (!disable_net) {
2903 hso_dev = hso_create_net_device(interface,
2904 port_spec);
2905 if (!hso_dev)
2906 goto exit;
2907 tmp_dev = hso_dev;
2908 }
2909 }
2910
2911 if (hso_get_mux_ports(interface, &port_mask))
2912 /* TODO: de-allocate everything */
2913 goto exit;
2914
2915 shared_int = hso_create_shared_int(interface);
2916 if (!shared_int)
2917 goto exit;
2918
2919 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2920 if (port_mask & i) {
2921 hso_dev = hso_create_mux_serial_device(
2922 interface, i, shared_int);
2923 if (!hso_dev)
2924 goto exit;
2925 }
2926 }
2927
2928 if (tmp_dev)
2929 hso_dev = tmp_dev;
2930 break;
2931
2932 case HSO_INTF_BULK:
2933 /* It's a regular bulk interface */
2934 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2935 if (!disable_net)
2936 hso_dev =
2937 hso_create_net_device(interface, port_spec);
2938 } else {
2939 hso_dev =
2940 hso_create_bulk_serial_device(interface, port_spec);
2941 }
2942 if (!hso_dev)
2943 goto exit;
2944 break;
2945 default:
2946 goto exit;
2947 }
2948
2949 /* save our data pointer in this device */
2950 usb_set_intfdata(interface, hso_dev);
2951
2952 /* done */
2953 return 0;
2954 exit:
2955 hso_free_interface(interface);
2956 return -ENODEV;
2957 }
2958
2959 /* device removed, cleaning up */
2960 static void hso_disconnect(struct usb_interface *interface)
2961 {
2962 hso_free_interface(interface);
2963
2964 /* remove reference of our private data */
2965 usb_set_intfdata(interface, NULL);
2966 }
2967
2968 static void async_get_intf(struct work_struct *data)
2969 {
2970 struct hso_device *hso_dev =
2971 container_of(data, struct hso_device, async_get_intf);
2972 usb_autopm_get_interface(hso_dev->interface);
2973 }
2974
2975 static void async_put_intf(struct work_struct *data)
2976 {
2977 struct hso_device *hso_dev =
2978 container_of(data, struct hso_device, async_put_intf);
2979 usb_autopm_put_interface(hso_dev->interface);
2980 }
2981
2982 static int hso_get_activity(struct hso_device *hso_dev)
2983 {
2984 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2985 if (!hso_dev->is_active) {
2986 hso_dev->is_active = 1;
2987 schedule_work(&hso_dev->async_get_intf);
2988 }
2989 }
2990
2991 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
2992 return -EAGAIN;
2993
2994 usb_mark_last_busy(hso_dev->usb);
2995
2996 return 0;
2997 }
2998
2999 static int hso_put_activity(struct hso_device *hso_dev)
3000 {
3001 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3002 if (hso_dev->is_active) {
3003 hso_dev->is_active = 0;
3004 schedule_work(&hso_dev->async_put_intf);
3005 return -EAGAIN;
3006 }
3007 }
3008 hso_dev->is_active = 0;
3009 return 0;
3010 }
3011
3012 /* called by kernel when we need to suspend device */
3013 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3014 {
3015 int i, result;
3016
3017 /* Stop all serial ports */
3018 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3019 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3020 result = hso_stop_serial_device(serial_table[i]);
3021 if (result)
3022 goto out;
3023 }
3024 }
3025
3026 /* Stop all network ports */
3027 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3028 if (network_table[i] &&
3029 (network_table[i]->interface == iface)) {
3030 result = hso_stop_net_device(network_table[i]);
3031 if (result)
3032 goto out;
3033 }
3034 }
3035
3036 out:
3037 return 0;
3038 }
3039
3040 /* called by kernel when we need to resume device */
3041 static int hso_resume(struct usb_interface *iface)
3042 {
3043 int i, result = 0;
3044 struct hso_net *hso_net;
3045
3046 /* Start all serial ports */
3047 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3048 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3049 if (dev2ser(serial_table[i])->port.count) {
3050 result =
3051 hso_start_serial_device(serial_table[i], GFP_NOIO);
3052 hso_kick_transmit(dev2ser(serial_table[i]));
3053 if (result)
3054 goto out;
3055 }
3056 }
3057 }
3058
3059 /* Start all network ports */
3060 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3061 if (network_table[i] &&
3062 (network_table[i]->interface == iface)) {
3063 hso_net = dev2net(network_table[i]);
3064 if (hso_net->flags & IFF_UP) {
3065 /* First transmit any lingering data,
3066 then restart the device. */
3067 if (hso_net->skb_tx_buf) {
3068 dev_dbg(&iface->dev,
3069 "Transmitting"
3070 " lingering data\n");
3071 hso_net_start_xmit(hso_net->skb_tx_buf,
3072 hso_net->net);
3073 hso_net->skb_tx_buf = NULL;
3074 }
3075 result = hso_start_net_device(network_table[i]);
3076 if (result)
3077 goto out;
3078 }
3079 }
3080 }
3081
3082 out:
3083 return result;
3084 }
3085
3086 static void reset_device(struct work_struct *data)
3087 {
3088 struct hso_device *hso_dev =
3089 container_of(data, struct hso_device, reset_device);
3090 struct usb_device *usb = hso_dev->usb;
3091 int result;
3092
3093 if (hso_dev->usb_gone) {
3094 D1("No reset during disconnect\n");
3095 } else {
3096 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3097 if (result < 0)
3098 D1("unable to lock device for reset: %d\n", result);
3099 else {
3100 usb_reset_device(usb);
3101 usb_unlock_device(usb);
3102 }
3103 }
3104 }
3105
3106 static void hso_serial_ref_free(struct kref *ref)
3107 {
3108 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3109
3110 hso_free_serial_device(hso_dev);
3111 }
3112
3113 static void hso_free_interface(struct usb_interface *interface)
3114 {
3115 struct hso_serial *hso_dev;
3116 int i;
3117
3118 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3119 if (serial_table[i] &&
3120 (serial_table[i]->interface == interface)) {
3121 hso_dev = dev2ser(serial_table[i]);
3122 tty_port_tty_hangup(&hso_dev->port, false);
3123 mutex_lock(&hso_dev->parent->mutex);
3124 hso_dev->parent->usb_gone = 1;
3125 mutex_unlock(&hso_dev->parent->mutex);
3126 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3127 }
3128 }
3129
3130 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3131 if (network_table[i] &&
3132 (network_table[i]->interface == interface)) {
3133 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3134 /* hso_stop_net_device doesn't stop the net queue since
3135 * traffic needs to start it again when suspended */
3136 netif_stop_queue(dev2net(network_table[i])->net);
3137 hso_stop_net_device(network_table[i]);
3138 cancel_work_sync(&network_table[i]->async_put_intf);
3139 cancel_work_sync(&network_table[i]->async_get_intf);
3140 if (rfk) {
3141 rfkill_unregister(rfk);
3142 rfkill_destroy(rfk);
3143 }
3144 hso_free_net_device(network_table[i]);
3145 }
3146 }
3147 }
3148
3149 /* Helper functions */
3150
3151 /* Get the endpoint ! */
3152 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3153 int type, int dir)
3154 {
3155 int i;
3156 struct usb_host_interface *iface = intf->cur_altsetting;
3157 struct usb_endpoint_descriptor *endp;
3158
3159 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3160 endp = &iface->endpoint[i].desc;
3161 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3162 (usb_endpoint_type(endp) == type))
3163 return endp;
3164 }
3165
3166 return NULL;
3167 }
3168
3169 /* Get the byte that describes which ports are enabled */
3170 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3171 {
3172 int i;
3173 struct usb_host_interface *iface = intf->cur_altsetting;
3174
3175 if (iface->extralen == 3) {
3176 *ports = iface->extra[2];
3177 return 0;
3178 }
3179
3180 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3181 if (iface->endpoint[i].extralen == 3) {
3182 *ports = iface->endpoint[i].extra[2];
3183 return 0;
3184 }
3185 }
3186
3187 return -1;
3188 }
3189
3190 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3191 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3192 struct usb_device *usb, gfp_t gfp)
3193 {
3194 int result;
3195
3196 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3197 usb_rcvintpipe(usb,
3198 shared_int->intr_endp->bEndpointAddress & 0x7F),
3199 shared_int->shared_intr_buf,
3200 1,
3201 intr_callback, shared_int,
3202 shared_int->intr_endp->bInterval);
3203
3204 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3205 if (result)
3206 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3207 result);
3208
3209 return result;
3210 }
3211
3212 /* operations setup of the serial interface */
3213 static const struct tty_operations hso_serial_ops = {
3214 .open = hso_serial_open,
3215 .close = hso_serial_close,
3216 .write = hso_serial_write,
3217 .write_room = hso_serial_write_room,
3218 .ioctl = hso_serial_ioctl,
3219 .set_termios = hso_serial_set_termios,
3220 .chars_in_buffer = hso_serial_chars_in_buffer,
3221 .tiocmget = hso_serial_tiocmget,
3222 .tiocmset = hso_serial_tiocmset,
3223 .get_icount = hso_get_count,
3224 .unthrottle = hso_unthrottle
3225 };
3226
3227 static struct usb_driver hso_driver = {
3228 .name = driver_name,
3229 .probe = hso_probe,
3230 .disconnect = hso_disconnect,
3231 .id_table = hso_ids,
3232 .suspend = hso_suspend,
3233 .resume = hso_resume,
3234 .reset_resume = hso_resume,
3235 .supports_autosuspend = 1,
3236 .disable_hub_initiated_lpm = 1,
3237 };
3238
3239 static int __init hso_init(void)
3240 {
3241 int i;
3242 int result;
3243
3244 /* put it in the log */
3245 printk(KERN_INFO "hso: %s\n", version);
3246
3247 /* Initialise the serial table semaphore and table */
3248 spin_lock_init(&serial_table_lock);
3249 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3250 serial_table[i] = NULL;
3251
3252 /* allocate our driver using the proper amount of supported minors */
3253 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3254 if (!tty_drv)
3255 return -ENOMEM;
3256
3257 /* fill in all needed values */
3258 tty_drv->driver_name = driver_name;
3259 tty_drv->name = tty_filename;
3260
3261 /* if major number is provided as parameter, use that one */
3262 if (tty_major)
3263 tty_drv->major = tty_major;
3264
3265 tty_drv->minor_start = 0;
3266 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3267 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3268 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3269 tty_drv->init_termios = tty_std_termios;
3270 hso_init_termios(&tty_drv->init_termios);
3271 tty_set_operations(tty_drv, &hso_serial_ops);
3272
3273 /* register the tty driver */
3274 result = tty_register_driver(tty_drv);
3275 if (result) {
3276 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3277 __func__, result);
3278 goto err_free_tty;
3279 }
3280
3281 /* register this module as an usb driver */
3282 result = usb_register(&hso_driver);
3283 if (result) {
3284 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3285 result);
3286 goto err_unreg_tty;
3287 }
3288
3289 /* done */
3290 return 0;
3291 err_unreg_tty:
3292 tty_unregister_driver(tty_drv);
3293 err_free_tty:
3294 put_tty_driver(tty_drv);
3295 return result;
3296 }
3297
3298 static void __exit hso_exit(void)
3299 {
3300 printk(KERN_INFO "hso: unloaded\n");
3301
3302 tty_unregister_driver(tty_drv);
3303 put_tty_driver(tty_drv);
3304 /* deregister the usb driver */
3305 usb_deregister(&hso_driver);
3306 }
3307
3308 /* Module definitions */
3309 module_init(hso_init);
3310 module_exit(hso_exit);
3311
3312 MODULE_AUTHOR(MOD_AUTHOR);
3313 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3314 MODULE_LICENSE(MOD_LICENSE);
3315
3316 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3317 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3318 module_param(debug, int, S_IRUGO | S_IWUSR);
3319
3320 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3321 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3322 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3323
3324 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3325 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3326 module_param(disable_net, int, S_IRUGO | S_IWUSR);
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