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hso: fix crash when device disappears while serial port is open
[deliverable/linux.git] / drivers / net / usb / hso.c
1 /******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
6 * Filip Aben <f.aben@option.com>
7 * Denis Joseph Barrow <d.barow@option.com>
8 * Jan Dumon <j.dumon@option.com>
9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
10 * <ajb@spheresystems.co.uk>
11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
12 * Copyright (C) 2008 Novell, Inc.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
26 * USA
27 *
28 *
29 *****************************************************************************/
30
31 /******************************************************************************
32 *
33 * Description of the device:
34 *
35 * Interface 0: Contains the IP network interface on the bulk end points.
36 * The multiplexed serial ports are using the interrupt and
37 * control endpoints.
38 * Interrupt contains a bitmap telling which multiplexed
39 * serialport needs servicing.
40 *
41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
42 * port is opened, as this have a huge impact on the network port
43 * throughput.
44 *
45 * Interface 2: Standard modem interface - circuit switched interface, this
46 * can be used to make a standard ppp connection however it
47 * should not be used in conjunction with the IP network interface
48 * enabled for USB performance reasons i.e. if using this set
49 * ideally disable_net=1.
50 *
51 *****************************************************************************/
52
53 #include <linux/sched.h>
54 #include <linux/slab.h>
55 #include <linux/init.h>
56 #include <linux/delay.h>
57 #include <linux/netdevice.h>
58 #include <linux/module.h>
59 #include <linux/ethtool.h>
60 #include <linux/usb.h>
61 #include <linux/tty.h>
62 #include <linux/tty_driver.h>
63 #include <linux/tty_flip.h>
64 #include <linux/kmod.h>
65 #include <linux/rfkill.h>
66 #include <linux/ip.h>
67 #include <linux/uaccess.h>
68 #include <linux/usb/cdc.h>
69 #include <net/arp.h>
70 #include <asm/byteorder.h>
71 #include <linux/serial_core.h>
72 #include <linux/serial.h>
73
74
75 #define MOD_AUTHOR "Option Wireless"
76 #define MOD_DESCRIPTION "USB High Speed Option driver"
77 #define MOD_LICENSE "GPL"
78
79 #define HSO_MAX_NET_DEVICES 10
80 #define HSO__MAX_MTU 2048
81 #define DEFAULT_MTU 1500
82 #define DEFAULT_MRU 1500
83
84 #define CTRL_URB_RX_SIZE 1024
85 #define CTRL_URB_TX_SIZE 64
86
87 #define BULK_URB_RX_SIZE 4096
88 #define BULK_URB_TX_SIZE 8192
89
90 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
91 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
92 #define MUX_BULK_RX_BUF_COUNT 4
93 #define USB_TYPE_OPTION_VENDOR 0x20
94
95 /* These definitions are used with the struct hso_net flags element */
96 /* - use *_bit operations on it. (bit indices not values.) */
97 #define HSO_NET_RUNNING 0
98
99 #define HSO_NET_TX_TIMEOUT (HZ*10)
100
101 #define HSO_SERIAL_MAGIC 0x48534f31
102
103 /* Number of ttys to handle */
104 #define HSO_SERIAL_TTY_MINORS 256
105
106 #define MAX_RX_URBS 2
107
108 /*****************************************************************************/
109 /* Debugging functions */
110 /*****************************************************************************/
111 #define D__(lvl_, fmt, arg...) \
112 do { \
113 printk(lvl_ "[%d:%s]: " fmt "\n", \
114 __LINE__, __func__, ## arg); \
115 } while (0)
116
117 #define D_(lvl, args...) \
118 do { \
119 if (lvl & debug) \
120 D__(KERN_INFO, args); \
121 } while (0)
122
123 #define D1(args...) D_(0x01, ##args)
124 #define D2(args...) D_(0x02, ##args)
125 #define D3(args...) D_(0x04, ##args)
126 #define D4(args...) D_(0x08, ##args)
127 #define D5(args...) D_(0x10, ##args)
128
129 /*****************************************************************************/
130 /* Enumerators */
131 /*****************************************************************************/
132 enum pkt_parse_state {
133 WAIT_IP,
134 WAIT_DATA,
135 WAIT_SYNC
136 };
137
138 /*****************************************************************************/
139 /* Structs */
140 /*****************************************************************************/
141
142 struct hso_shared_int {
143 struct usb_endpoint_descriptor *intr_endp;
144 void *shared_intr_buf;
145 struct urb *shared_intr_urb;
146 struct usb_device *usb;
147 int use_count;
148 int ref_count;
149 struct mutex shared_int_lock;
150 };
151
152 struct hso_net {
153 struct hso_device *parent;
154 struct net_device *net;
155 struct rfkill *rfkill;
156
157 struct usb_endpoint_descriptor *in_endp;
158 struct usb_endpoint_descriptor *out_endp;
159
160 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
161 struct urb *mux_bulk_tx_urb;
162 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
163 void *mux_bulk_tx_buf;
164
165 struct sk_buff *skb_rx_buf;
166 struct sk_buff *skb_tx_buf;
167
168 enum pkt_parse_state rx_parse_state;
169 spinlock_t net_lock;
170
171 unsigned short rx_buf_size;
172 unsigned short rx_buf_missing;
173 struct iphdr rx_ip_hdr;
174
175 unsigned long flags;
176 };
177
178 enum rx_ctrl_state{
179 RX_IDLE,
180 RX_SENT,
181 RX_PENDING
182 };
183
184 #define BM_REQUEST_TYPE (0xa1)
185 #define B_NOTIFICATION (0x20)
186 #define W_VALUE (0x0)
187 #define W_LENGTH (0x2)
188
189 #define B_OVERRUN (0x1<<6)
190 #define B_PARITY (0x1<<5)
191 #define B_FRAMING (0x1<<4)
192 #define B_RING_SIGNAL (0x1<<3)
193 #define B_BREAK (0x1<<2)
194 #define B_TX_CARRIER (0x1<<1)
195 #define B_RX_CARRIER (0x1<<0)
196
197 struct hso_serial_state_notification {
198 u8 bmRequestType;
199 u8 bNotification;
200 u16 wValue;
201 u16 wIndex;
202 u16 wLength;
203 u16 UART_state_bitmap;
204 } __packed;
205
206 struct hso_tiocmget {
207 struct mutex mutex;
208 wait_queue_head_t waitq;
209 int intr_completed;
210 struct usb_endpoint_descriptor *endp;
211 struct urb *urb;
212 struct hso_serial_state_notification serial_state_notification;
213 u16 prev_UART_state_bitmap;
214 struct uart_icount icount;
215 };
216
217
218 struct hso_serial {
219 struct hso_device *parent;
220 int magic;
221 u8 minor;
222
223 struct hso_shared_int *shared_int;
224
225 /* rx/tx urb could be either a bulk urb or a control urb depending
226 on which serial port it is used on. */
227 struct urb *rx_urb[MAX_RX_URBS];
228 u8 num_rx_urbs;
229 u8 *rx_data[MAX_RX_URBS];
230 u16 rx_data_length; /* should contain allocated length */
231
232 struct urb *tx_urb;
233 u8 *tx_data;
234 u8 *tx_buffer;
235 u16 tx_data_length; /* should contain allocated length */
236 u16 tx_data_count;
237 u16 tx_buffer_count;
238 struct usb_ctrlrequest ctrl_req_tx;
239 struct usb_ctrlrequest ctrl_req_rx;
240
241 struct usb_endpoint_descriptor *in_endp;
242 struct usb_endpoint_descriptor *out_endp;
243
244 enum rx_ctrl_state rx_state;
245 u8 rts_state;
246 u8 dtr_state;
247 unsigned tx_urb_used:1;
248
249 struct tty_port port;
250 /* from usb_serial_port */
251 spinlock_t serial_lock;
252
253 int (*write_data) (struct hso_serial *serial);
254 struct hso_tiocmget *tiocmget;
255 /* Hacks required to get flow control
256 * working on the serial receive buffers
257 * so as not to drop characters on the floor.
258 */
259 int curr_rx_urb_idx;
260 u8 rx_urb_filled[MAX_RX_URBS];
261 struct tasklet_struct unthrottle_tasklet;
262 };
263
264 struct hso_device {
265 union {
266 struct hso_serial *dev_serial;
267 struct hso_net *dev_net;
268 } port_data;
269
270 u32 port_spec;
271
272 u8 is_active;
273 u8 usb_gone;
274 struct work_struct async_get_intf;
275 struct work_struct async_put_intf;
276 struct work_struct reset_device;
277
278 struct usb_device *usb;
279 struct usb_interface *interface;
280
281 struct device *dev;
282 struct kref ref;
283 struct mutex mutex;
284 };
285
286 /* Type of interface */
287 #define HSO_INTF_MASK 0xFF00
288 #define HSO_INTF_MUX 0x0100
289 #define HSO_INTF_BULK 0x0200
290
291 /* Type of port */
292 #define HSO_PORT_MASK 0xFF
293 #define HSO_PORT_NO_PORT 0x0
294 #define HSO_PORT_CONTROL 0x1
295 #define HSO_PORT_APP 0x2
296 #define HSO_PORT_GPS 0x3
297 #define HSO_PORT_PCSC 0x4
298 #define HSO_PORT_APP2 0x5
299 #define HSO_PORT_GPS_CONTROL 0x6
300 #define HSO_PORT_MSD 0x7
301 #define HSO_PORT_VOICE 0x8
302 #define HSO_PORT_DIAG2 0x9
303 #define HSO_PORT_DIAG 0x10
304 #define HSO_PORT_MODEM 0x11
305 #define HSO_PORT_NETWORK 0x12
306
307 /* Additional device info */
308 #define HSO_INFO_MASK 0xFF000000
309 #define HSO_INFO_CRC_BUG 0x01000000
310
311 /*****************************************************************************/
312 /* Prototypes */
313 /*****************************************************************************/
314 /* Serial driver functions */
315 static int hso_serial_tiocmset(struct tty_struct *tty,
316 unsigned int set, unsigned int clear);
317 static void ctrl_callback(struct urb *urb);
318 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
319 static void hso_kick_transmit(struct hso_serial *serial);
320 /* Helper functions */
321 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
322 struct usb_device *usb, gfp_t gfp);
323 static void handle_usb_error(int status, const char *function,
324 struct hso_device *hso_dev);
325 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
326 int type, int dir);
327 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
328 static void hso_free_interface(struct usb_interface *intf);
329 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
330 static int hso_stop_serial_device(struct hso_device *hso_dev);
331 static int hso_start_net_device(struct hso_device *hso_dev);
332 static void hso_free_shared_int(struct hso_shared_int *shared_int);
333 static int hso_stop_net_device(struct hso_device *hso_dev);
334 static void hso_serial_ref_free(struct kref *ref);
335 static void hso_std_serial_read_bulk_callback(struct urb *urb);
336 static int hso_mux_serial_read(struct hso_serial *serial);
337 static void async_get_intf(struct work_struct *data);
338 static void async_put_intf(struct work_struct *data);
339 static int hso_put_activity(struct hso_device *hso_dev);
340 static int hso_get_activity(struct hso_device *hso_dev);
341 static void tiocmget_intr_callback(struct urb *urb);
342 static void reset_device(struct work_struct *data);
343 /*****************************************************************************/
344 /* Helping functions */
345 /*****************************************************************************/
346
347 /* #define DEBUG */
348
349 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
350 {
351 return hso_dev->port_data.dev_net;
352 }
353
354 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
355 {
356 return hso_dev->port_data.dev_serial;
357 }
358
359 /* Debugging functions */
360 #ifdef DEBUG
361 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
362 unsigned int len)
363 {
364 static char name[255];
365
366 sprintf(name, "hso[%d:%s]", line_count, func_name);
367 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
368 }
369
370 #define DUMP(buf_, len_) \
371 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
372
373 #define DUMP1(buf_, len_) \
374 do { \
375 if (0x01 & debug) \
376 DUMP(buf_, len_); \
377 } while (0)
378 #else
379 #define DUMP(buf_, len_)
380 #define DUMP1(buf_, len_)
381 #endif
382
383 /* module parameters */
384 static int debug;
385 static int tty_major;
386 static int disable_net;
387
388 /* driver info */
389 static const char driver_name[] = "hso";
390 static const char tty_filename[] = "ttyHS";
391 static const char *version = __FILE__ ": " MOD_AUTHOR;
392 /* the usb driver itself (registered in hso_init) */
393 static struct usb_driver hso_driver;
394 /* serial structures */
395 static struct tty_driver *tty_drv;
396 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
397 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
398 static spinlock_t serial_table_lock;
399
400 static const s32 default_port_spec[] = {
401 HSO_INTF_MUX | HSO_PORT_NETWORK,
402 HSO_INTF_BULK | HSO_PORT_DIAG,
403 HSO_INTF_BULK | HSO_PORT_MODEM,
404 0
405 };
406
407 static const s32 icon321_port_spec[] = {
408 HSO_INTF_MUX | HSO_PORT_NETWORK,
409 HSO_INTF_BULK | HSO_PORT_DIAG2,
410 HSO_INTF_BULK | HSO_PORT_MODEM,
411 HSO_INTF_BULK | HSO_PORT_DIAG,
412 0
413 };
414
415 #define default_port_device(vendor, product) \
416 USB_DEVICE(vendor, product), \
417 .driver_info = (kernel_ulong_t)default_port_spec
418
419 #define icon321_port_device(vendor, product) \
420 USB_DEVICE(vendor, product), \
421 .driver_info = (kernel_ulong_t)icon321_port_spec
422
423 /* list of devices we support */
424 static const struct usb_device_id hso_ids[] = {
425 {default_port_device(0x0af0, 0x6711)},
426 {default_port_device(0x0af0, 0x6731)},
427 {default_port_device(0x0af0, 0x6751)},
428 {default_port_device(0x0af0, 0x6771)},
429 {default_port_device(0x0af0, 0x6791)},
430 {default_port_device(0x0af0, 0x6811)},
431 {default_port_device(0x0af0, 0x6911)},
432 {default_port_device(0x0af0, 0x6951)},
433 {default_port_device(0x0af0, 0x6971)},
434 {default_port_device(0x0af0, 0x7011)},
435 {default_port_device(0x0af0, 0x7031)},
436 {default_port_device(0x0af0, 0x7051)},
437 {default_port_device(0x0af0, 0x7071)},
438 {default_port_device(0x0af0, 0x7111)},
439 {default_port_device(0x0af0, 0x7211)},
440 {default_port_device(0x0af0, 0x7251)},
441 {default_port_device(0x0af0, 0x7271)},
442 {default_port_device(0x0af0, 0x7311)},
443 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
444 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
445 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
446 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
447 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
448 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
449 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
450 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
451 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
452 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
453 {USB_DEVICE(0x0af0, 0x7701)},
454 {USB_DEVICE(0x0af0, 0x7706)},
455 {USB_DEVICE(0x0af0, 0x7801)},
456 {USB_DEVICE(0x0af0, 0x7901)},
457 {USB_DEVICE(0x0af0, 0x7A01)},
458 {USB_DEVICE(0x0af0, 0x7A05)},
459 {USB_DEVICE(0x0af0, 0x8200)},
460 {USB_DEVICE(0x0af0, 0x8201)},
461 {USB_DEVICE(0x0af0, 0x8300)},
462 {USB_DEVICE(0x0af0, 0x8302)},
463 {USB_DEVICE(0x0af0, 0x8304)},
464 {USB_DEVICE(0x0af0, 0x8400)},
465 {USB_DEVICE(0x0af0, 0x8600)},
466 {USB_DEVICE(0x0af0, 0x8800)},
467 {USB_DEVICE(0x0af0, 0x8900)},
468 {USB_DEVICE(0x0af0, 0x9000)},
469 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */
470 {USB_DEVICE(0x0af0, 0xd035)},
471 {USB_DEVICE(0x0af0, 0xd055)},
472 {USB_DEVICE(0x0af0, 0xd155)},
473 {USB_DEVICE(0x0af0, 0xd255)},
474 {USB_DEVICE(0x0af0, 0xd057)},
475 {USB_DEVICE(0x0af0, 0xd157)},
476 {USB_DEVICE(0x0af0, 0xd257)},
477 {USB_DEVICE(0x0af0, 0xd357)},
478 {USB_DEVICE(0x0af0, 0xd058)},
479 {USB_DEVICE(0x0af0, 0xc100)},
480 {}
481 };
482 MODULE_DEVICE_TABLE(usb, hso_ids);
483
484 /* Sysfs attribute */
485 static ssize_t hso_sysfs_show_porttype(struct device *dev,
486 struct device_attribute *attr,
487 char *buf)
488 {
489 struct hso_device *hso_dev = dev_get_drvdata(dev);
490 char *port_name;
491
492 if (!hso_dev)
493 return 0;
494
495 switch (hso_dev->port_spec & HSO_PORT_MASK) {
496 case HSO_PORT_CONTROL:
497 port_name = "Control";
498 break;
499 case HSO_PORT_APP:
500 port_name = "Application";
501 break;
502 case HSO_PORT_APP2:
503 port_name = "Application2";
504 break;
505 case HSO_PORT_GPS:
506 port_name = "GPS";
507 break;
508 case HSO_PORT_GPS_CONTROL:
509 port_name = "GPS Control";
510 break;
511 case HSO_PORT_PCSC:
512 port_name = "PCSC";
513 break;
514 case HSO_PORT_DIAG:
515 port_name = "Diagnostic";
516 break;
517 case HSO_PORT_DIAG2:
518 port_name = "Diagnostic2";
519 break;
520 case HSO_PORT_MODEM:
521 port_name = "Modem";
522 break;
523 case HSO_PORT_NETWORK:
524 port_name = "Network";
525 break;
526 default:
527 port_name = "Unknown";
528 break;
529 }
530
531 return sprintf(buf, "%s\n", port_name);
532 }
533 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
534
535 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
536 {
537 int idx;
538
539 for (idx = 0; idx < serial->num_rx_urbs; idx++)
540 if (serial->rx_urb[idx] == urb)
541 return idx;
542 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
543 return -1;
544 }
545
546 /* converts mux value to a port spec value */
547 static u32 hso_mux_to_port(int mux)
548 {
549 u32 result;
550
551 switch (mux) {
552 case 0x1:
553 result = HSO_PORT_CONTROL;
554 break;
555 case 0x2:
556 result = HSO_PORT_APP;
557 break;
558 case 0x4:
559 result = HSO_PORT_PCSC;
560 break;
561 case 0x8:
562 result = HSO_PORT_GPS;
563 break;
564 case 0x10:
565 result = HSO_PORT_APP2;
566 break;
567 default:
568 result = HSO_PORT_NO_PORT;
569 }
570 return result;
571 }
572
573 /* converts port spec value to a mux value */
574 static u32 hso_port_to_mux(int port)
575 {
576 u32 result;
577
578 switch (port & HSO_PORT_MASK) {
579 case HSO_PORT_CONTROL:
580 result = 0x0;
581 break;
582 case HSO_PORT_APP:
583 result = 0x1;
584 break;
585 case HSO_PORT_PCSC:
586 result = 0x2;
587 break;
588 case HSO_PORT_GPS:
589 result = 0x3;
590 break;
591 case HSO_PORT_APP2:
592 result = 0x4;
593 break;
594 default:
595 result = 0x0;
596 }
597 return result;
598 }
599
600 static struct hso_serial *get_serial_by_shared_int_and_type(
601 struct hso_shared_int *shared_int,
602 int mux)
603 {
604 int i, port;
605
606 port = hso_mux_to_port(mux);
607
608 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
609 if (serial_table[i] &&
610 (dev2ser(serial_table[i])->shared_int == shared_int) &&
611 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
612 return dev2ser(serial_table[i]);
613 }
614 }
615
616 return NULL;
617 }
618
619 static struct hso_serial *get_serial_by_index(unsigned index)
620 {
621 struct hso_serial *serial = NULL;
622 unsigned long flags;
623
624 spin_lock_irqsave(&serial_table_lock, flags);
625 if (serial_table[index])
626 serial = dev2ser(serial_table[index]);
627 spin_unlock_irqrestore(&serial_table_lock, flags);
628
629 return serial;
630 }
631
632 static int get_free_serial_index(void)
633 {
634 int index;
635 unsigned long flags;
636
637 spin_lock_irqsave(&serial_table_lock, flags);
638 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
639 if (serial_table[index] == NULL) {
640 spin_unlock_irqrestore(&serial_table_lock, flags);
641 return index;
642 }
643 }
644 spin_unlock_irqrestore(&serial_table_lock, flags);
645
646 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
647 return -1;
648 }
649
650 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
651 {
652 unsigned long flags;
653
654 spin_lock_irqsave(&serial_table_lock, flags);
655 if (serial)
656 serial_table[index] = serial->parent;
657 else
658 serial_table[index] = NULL;
659 spin_unlock_irqrestore(&serial_table_lock, flags);
660 }
661
662 static void handle_usb_error(int status, const char *function,
663 struct hso_device *hso_dev)
664 {
665 char *explanation;
666
667 switch (status) {
668 case -ENODEV:
669 explanation = "no device";
670 break;
671 case -ENOENT:
672 explanation = "endpoint not enabled";
673 break;
674 case -EPIPE:
675 explanation = "endpoint stalled";
676 break;
677 case -ENOSPC:
678 explanation = "not enough bandwidth";
679 break;
680 case -ESHUTDOWN:
681 explanation = "device disabled";
682 break;
683 case -EHOSTUNREACH:
684 explanation = "device suspended";
685 break;
686 case -EINVAL:
687 case -EAGAIN:
688 case -EFBIG:
689 case -EMSGSIZE:
690 explanation = "internal error";
691 break;
692 case -EILSEQ:
693 case -EPROTO:
694 case -ETIME:
695 case -ETIMEDOUT:
696 explanation = "protocol error";
697 if (hso_dev)
698 schedule_work(&hso_dev->reset_device);
699 break;
700 default:
701 explanation = "unknown status";
702 break;
703 }
704
705 /* log a meaningful explanation of an USB status */
706 D1("%s: received USB status - %s (%d)", function, explanation, status);
707 }
708
709 /* Network interface functions */
710
711 /* called when net interface is brought up by ifconfig */
712 static int hso_net_open(struct net_device *net)
713 {
714 struct hso_net *odev = netdev_priv(net);
715 unsigned long flags = 0;
716
717 if (!odev) {
718 dev_err(&net->dev, "No net device !\n");
719 return -ENODEV;
720 }
721
722 odev->skb_tx_buf = NULL;
723
724 /* setup environment */
725 spin_lock_irqsave(&odev->net_lock, flags);
726 odev->rx_parse_state = WAIT_IP;
727 odev->rx_buf_size = 0;
728 odev->rx_buf_missing = sizeof(struct iphdr);
729 spin_unlock_irqrestore(&odev->net_lock, flags);
730
731 /* We are up and running. */
732 set_bit(HSO_NET_RUNNING, &odev->flags);
733 hso_start_net_device(odev->parent);
734
735 /* Tell the kernel we are ready to start receiving from it */
736 netif_start_queue(net);
737
738 return 0;
739 }
740
741 /* called when interface is brought down by ifconfig */
742 static int hso_net_close(struct net_device *net)
743 {
744 struct hso_net *odev = netdev_priv(net);
745
746 /* we don't need the queue anymore */
747 netif_stop_queue(net);
748 /* no longer running */
749 clear_bit(HSO_NET_RUNNING, &odev->flags);
750
751 hso_stop_net_device(odev->parent);
752
753 /* done */
754 return 0;
755 }
756
757 /* USB tells is xmit done, we should start the netqueue again */
758 static void write_bulk_callback(struct urb *urb)
759 {
760 struct hso_net *odev = urb->context;
761 int status = urb->status;
762
763 /* Sanity check */
764 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
765 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
766 return;
767 }
768
769 /* Do we still have a valid kernel network device? */
770 if (!netif_device_present(odev->net)) {
771 dev_err(&urb->dev->dev, "%s: net device not present\n",
772 __func__);
773 return;
774 }
775
776 /* log status, but don't act on it, we don't need to resubmit anything
777 * anyhow */
778 if (status)
779 handle_usb_error(status, __func__, odev->parent);
780
781 hso_put_activity(odev->parent);
782
783 /* Tell the network interface we are ready for another frame */
784 netif_wake_queue(odev->net);
785 }
786
787 /* called by kernel when we need to transmit a packet */
788 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
789 struct net_device *net)
790 {
791 struct hso_net *odev = netdev_priv(net);
792 int result;
793
794 /* Tell the kernel, "No more frames 'til we are done with this one." */
795 netif_stop_queue(net);
796 if (hso_get_activity(odev->parent) == -EAGAIN) {
797 odev->skb_tx_buf = skb;
798 return NETDEV_TX_OK;
799 }
800
801 /* log if asked */
802 DUMP1(skb->data, skb->len);
803 /* Copy it from kernel memory to OUR memory */
804 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
805 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
806
807 /* Fill in the URB for shipping it out. */
808 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
809 odev->parent->usb,
810 usb_sndbulkpipe(odev->parent->usb,
811 odev->out_endp->
812 bEndpointAddress & 0x7F),
813 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
814 odev);
815
816 /* Deal with the Zero Length packet problem, I hope */
817 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
818
819 /* Send the URB on its merry way. */
820 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
821 if (result) {
822 dev_warn(&odev->parent->interface->dev,
823 "failed mux_bulk_tx_urb %d\n", result);
824 net->stats.tx_errors++;
825 netif_start_queue(net);
826 } else {
827 net->stats.tx_packets++;
828 net->stats.tx_bytes += skb->len;
829 }
830 dev_kfree_skb(skb);
831 /* we're done */
832 return NETDEV_TX_OK;
833 }
834
835 static const struct ethtool_ops ops = {
836 .get_link = ethtool_op_get_link
837 };
838
839 /* called when a packet did not ack after watchdogtimeout */
840 static void hso_net_tx_timeout(struct net_device *net)
841 {
842 struct hso_net *odev = netdev_priv(net);
843
844 if (!odev)
845 return;
846
847 /* Tell syslog we are hosed. */
848 dev_warn(&net->dev, "Tx timed out.\n");
849
850 /* Tear the waiting frame off the list */
851 if (odev->mux_bulk_tx_urb &&
852 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
853 usb_unlink_urb(odev->mux_bulk_tx_urb);
854
855 /* Update statistics */
856 net->stats.tx_errors++;
857 }
858
859 /* make a real packet from the received USB buffer */
860 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
861 unsigned int count, unsigned char is_eop)
862 {
863 unsigned short temp_bytes;
864 unsigned short buffer_offset = 0;
865 unsigned short frame_len;
866 unsigned char *tmp_rx_buf;
867
868 /* log if needed */
869 D1("Rx %d bytes", count);
870 DUMP(ip_pkt, min(128, (int)count));
871
872 while (count) {
873 switch (odev->rx_parse_state) {
874 case WAIT_IP:
875 /* waiting for IP header. */
876 /* wanted bytes - size of ip header */
877 temp_bytes =
878 (count <
879 odev->rx_buf_missing) ? count : odev->
880 rx_buf_missing;
881
882 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
883 odev->rx_buf_size, ip_pkt + buffer_offset,
884 temp_bytes);
885
886 odev->rx_buf_size += temp_bytes;
887 buffer_offset += temp_bytes;
888 odev->rx_buf_missing -= temp_bytes;
889 count -= temp_bytes;
890
891 if (!odev->rx_buf_missing) {
892 /* header is complete allocate an sk_buffer and
893 * continue to WAIT_DATA */
894 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
895
896 if ((frame_len > DEFAULT_MRU) ||
897 (frame_len < sizeof(struct iphdr))) {
898 dev_err(&odev->net->dev,
899 "Invalid frame (%d) length\n",
900 frame_len);
901 odev->rx_parse_state = WAIT_SYNC;
902 continue;
903 }
904 /* Allocate an sk_buff */
905 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
906 frame_len);
907 if (!odev->skb_rx_buf) {
908 /* We got no receive buffer. */
909 D1("could not allocate memory");
910 odev->rx_parse_state = WAIT_SYNC;
911 return;
912 }
913
914 /* Copy what we got so far. make room for iphdr
915 * after tail. */
916 tmp_rx_buf =
917 skb_put(odev->skb_rx_buf,
918 sizeof(struct iphdr));
919 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
920 sizeof(struct iphdr));
921
922 /* ETH_HLEN */
923 odev->rx_buf_size = sizeof(struct iphdr);
924
925 /* Filip actually use .tot_len */
926 odev->rx_buf_missing =
927 frame_len - sizeof(struct iphdr);
928 odev->rx_parse_state = WAIT_DATA;
929 }
930 break;
931
932 case WAIT_DATA:
933 temp_bytes = (count < odev->rx_buf_missing)
934 ? count : odev->rx_buf_missing;
935
936 /* Copy the rest of the bytes that are left in the
937 * buffer into the waiting sk_buf. */
938 /* Make room for temp_bytes after tail. */
939 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
940 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
941
942 odev->rx_buf_missing -= temp_bytes;
943 count -= temp_bytes;
944 buffer_offset += temp_bytes;
945 odev->rx_buf_size += temp_bytes;
946 if (!odev->rx_buf_missing) {
947 /* Packet is complete. Inject into stack. */
948 /* We have IP packet here */
949 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
950 skb_reset_mac_header(odev->skb_rx_buf);
951
952 /* Ship it off to the kernel */
953 netif_rx(odev->skb_rx_buf);
954 /* No longer our buffer. */
955 odev->skb_rx_buf = NULL;
956
957 /* update out statistics */
958 odev->net->stats.rx_packets++;
959
960 odev->net->stats.rx_bytes += odev->rx_buf_size;
961
962 odev->rx_buf_size = 0;
963 odev->rx_buf_missing = sizeof(struct iphdr);
964 odev->rx_parse_state = WAIT_IP;
965 }
966 break;
967
968 case WAIT_SYNC:
969 D1(" W_S");
970 count = 0;
971 break;
972 default:
973 D1(" ");
974 count--;
975 break;
976 }
977 }
978
979 /* Recovery mechanism for WAIT_SYNC state. */
980 if (is_eop) {
981 if (odev->rx_parse_state == WAIT_SYNC) {
982 odev->rx_parse_state = WAIT_IP;
983 odev->rx_buf_size = 0;
984 odev->rx_buf_missing = sizeof(struct iphdr);
985 }
986 }
987 }
988
989 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
990 {
991 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
992 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
993
994 if (((rest == 5) || (rest == 6)) &&
995 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
996 crc_check, 4)) {
997 urb->actual_length -= 4;
998 }
999 }
1000
1001 /* Moving data from usb to kernel (in interrupt state) */
1002 static void read_bulk_callback(struct urb *urb)
1003 {
1004 struct hso_net *odev = urb->context;
1005 struct net_device *net;
1006 int result;
1007 int status = urb->status;
1008
1009 /* is al ok? (Filip: Who's Al ?) */
1010 if (status) {
1011 handle_usb_error(status, __func__, odev->parent);
1012 return;
1013 }
1014
1015 /* Sanity check */
1016 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1017 D1("BULK IN callback but driver is not active!");
1018 return;
1019 }
1020 usb_mark_last_busy(urb->dev);
1021
1022 net = odev->net;
1023
1024 if (!netif_device_present(net)) {
1025 /* Somebody killed our network interface... */
1026 return;
1027 }
1028
1029 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1030 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1031
1032 /* do we even have a packet? */
1033 if (urb->actual_length) {
1034 /* Handle the IP stream, add header and push it onto network
1035 * stack if the packet is complete. */
1036 spin_lock(&odev->net_lock);
1037 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1038 (urb->transfer_buffer_length >
1039 urb->actual_length) ? 1 : 0);
1040 spin_unlock(&odev->net_lock);
1041 }
1042
1043 /* We are done with this URB, resubmit it. Prep the USB to wait for
1044 * another frame. Reuse same as received. */
1045 usb_fill_bulk_urb(urb,
1046 odev->parent->usb,
1047 usb_rcvbulkpipe(odev->parent->usb,
1048 odev->in_endp->
1049 bEndpointAddress & 0x7F),
1050 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1051 read_bulk_callback, odev);
1052
1053 /* Give this to the USB subsystem so it can tell us when more data
1054 * arrives. */
1055 result = usb_submit_urb(urb, GFP_ATOMIC);
1056 if (result)
1057 dev_warn(&odev->parent->interface->dev,
1058 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1059 result);
1060 }
1061
1062 /* Serial driver functions */
1063
1064 static void hso_init_termios(struct ktermios *termios)
1065 {
1066 /*
1067 * The default requirements for this device are:
1068 */
1069 termios->c_iflag &=
1070 ~(IGNBRK /* disable ignore break */
1071 | BRKINT /* disable break causes interrupt */
1072 | PARMRK /* disable mark parity errors */
1073 | ISTRIP /* disable clear high bit of input characters */
1074 | INLCR /* disable translate NL to CR */
1075 | IGNCR /* disable ignore CR */
1076 | ICRNL /* disable translate CR to NL */
1077 | IXON); /* disable enable XON/XOFF flow control */
1078
1079 /* disable postprocess output characters */
1080 termios->c_oflag &= ~OPOST;
1081
1082 termios->c_lflag &=
1083 ~(ECHO /* disable echo input characters */
1084 | ECHONL /* disable echo new line */
1085 | ICANON /* disable erase, kill, werase, and rprnt
1086 special characters */
1087 | ISIG /* disable interrupt, quit, and suspend special
1088 characters */
1089 | IEXTEN); /* disable non-POSIX special characters */
1090
1091 termios->c_cflag &=
1092 ~(CSIZE /* no size */
1093 | PARENB /* disable parity bit */
1094 | CBAUD /* clear current baud rate */
1095 | CBAUDEX); /* clear current buad rate */
1096
1097 termios->c_cflag |= CS8; /* character size 8 bits */
1098
1099 /* baud rate 115200 */
1100 tty_termios_encode_baud_rate(termios, 115200, 115200);
1101 }
1102
1103 static void _hso_serial_set_termios(struct tty_struct *tty,
1104 struct ktermios *old)
1105 {
1106 struct hso_serial *serial = tty->driver_data;
1107
1108 if (!serial) {
1109 printk(KERN_ERR "%s: no tty structures", __func__);
1110 return;
1111 }
1112
1113 D4("port %d", serial->minor);
1114
1115 /*
1116 * Fix up unsupported bits
1117 */
1118 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1119
1120 tty->termios.c_cflag &=
1121 ~(CSIZE /* no size */
1122 | PARENB /* disable parity bit */
1123 | CBAUD /* clear current baud rate */
1124 | CBAUDEX); /* clear current buad rate */
1125
1126 tty->termios.c_cflag |= CS8; /* character size 8 bits */
1127
1128 /* baud rate 115200 */
1129 tty_encode_baud_rate(tty, 115200, 115200);
1130 }
1131
1132 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1133 {
1134 int result;
1135 /* We are done with this URB, resubmit it. Prep the USB to wait for
1136 * another frame */
1137 usb_fill_bulk_urb(urb, serial->parent->usb,
1138 usb_rcvbulkpipe(serial->parent->usb,
1139 serial->in_endp->
1140 bEndpointAddress & 0x7F),
1141 urb->transfer_buffer, serial->rx_data_length,
1142 hso_std_serial_read_bulk_callback, serial);
1143 /* Give this to the USB subsystem so it can tell us when more data
1144 * arrives. */
1145 result = usb_submit_urb(urb, GFP_ATOMIC);
1146 if (result) {
1147 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1148 __func__, result);
1149 }
1150 }
1151
1152
1153
1154
1155 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1156 {
1157 int count;
1158 struct urb *curr_urb;
1159
1160 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1161 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1162 count = put_rxbuf_data(curr_urb, serial);
1163 if (count == -1)
1164 return;
1165 if (count == 0) {
1166 serial->curr_rx_urb_idx++;
1167 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1168 serial->curr_rx_urb_idx = 0;
1169 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1170 }
1171 }
1172 }
1173
1174 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1175 {
1176 int count = 0;
1177 struct urb *urb;
1178
1179 urb = serial->rx_urb[0];
1180 if (serial->port.count > 0) {
1181 count = put_rxbuf_data(urb, serial);
1182 if (count == -1)
1183 return;
1184 }
1185 /* Re issue a read as long as we receive data. */
1186
1187 if (count == 0 && ((urb->actual_length != 0) ||
1188 (serial->rx_state == RX_PENDING))) {
1189 serial->rx_state = RX_SENT;
1190 hso_mux_serial_read(serial);
1191 } else
1192 serial->rx_state = RX_IDLE;
1193 }
1194
1195
1196 /* read callback for Diag and CS port */
1197 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1198 {
1199 struct hso_serial *serial = urb->context;
1200 int status = urb->status;
1201
1202 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1203
1204 /* sanity check */
1205 if (!serial) {
1206 D1("serial == NULL");
1207 return;
1208 }
1209 if (status) {
1210 handle_usb_error(status, __func__, serial->parent);
1211 return;
1212 }
1213
1214 D1("Actual length = %d\n", urb->actual_length);
1215 DUMP1(urb->transfer_buffer, urb->actual_length);
1216
1217 /* Anyone listening? */
1218 if (serial->port.count == 0)
1219 return;
1220
1221 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1222 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1223 /* Valid data, handle RX data */
1224 spin_lock(&serial->serial_lock);
1225 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1226 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1227 spin_unlock(&serial->serial_lock);
1228 }
1229
1230 /*
1231 * This needs to be a tasklet otherwise we will
1232 * end up recursively calling this function.
1233 */
1234 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1235 {
1236 unsigned long flags;
1237
1238 spin_lock_irqsave(&serial->serial_lock, flags);
1239 if ((serial->parent->port_spec & HSO_INTF_MUX))
1240 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1241 else
1242 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1243 spin_unlock_irqrestore(&serial->serial_lock, flags);
1244 }
1245
1246 static void hso_unthrottle(struct tty_struct *tty)
1247 {
1248 struct hso_serial *serial = tty->driver_data;
1249
1250 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1251 }
1252
1253 /* open the requested serial port */
1254 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1255 {
1256 struct hso_serial *serial = get_serial_by_index(tty->index);
1257 int result;
1258
1259 /* sanity check */
1260 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1261 WARN_ON(1);
1262 tty->driver_data = NULL;
1263 D1("Failed to open port");
1264 return -ENODEV;
1265 }
1266
1267 mutex_lock(&serial->parent->mutex);
1268 result = usb_autopm_get_interface(serial->parent->interface);
1269 if (result < 0)
1270 goto err_out;
1271
1272 D1("Opening %d", serial->minor);
1273
1274 /* setup */
1275 tty->driver_data = serial;
1276 tty_port_tty_set(&serial->port, tty);
1277
1278 /* check for port already opened, if not set the termios */
1279 serial->port.count++;
1280 if (serial->port.count == 1) {
1281 serial->rx_state = RX_IDLE;
1282 /* Force default termio settings */
1283 _hso_serial_set_termios(tty, NULL);
1284 tasklet_init(&serial->unthrottle_tasklet,
1285 (void (*)(unsigned long))hso_unthrottle_tasklet,
1286 (unsigned long)serial);
1287 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1288 if (result) {
1289 hso_stop_serial_device(serial->parent);
1290 serial->port.count--;
1291 } else {
1292 kref_get(&serial->parent->ref);
1293 }
1294 } else {
1295 D1("Port was already open");
1296 }
1297
1298 usb_autopm_put_interface(serial->parent->interface);
1299
1300 /* done */
1301 if (result)
1302 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1303 err_out:
1304 mutex_unlock(&serial->parent->mutex);
1305 return result;
1306 }
1307
1308 /* close the requested serial port */
1309 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1310 {
1311 struct hso_serial *serial = tty->driver_data;
1312 u8 usb_gone;
1313
1314 D1("Closing serial port");
1315
1316 /* Open failed, no close cleanup required */
1317 if (serial == NULL)
1318 return;
1319
1320 mutex_lock(&serial->parent->mutex);
1321 usb_gone = serial->parent->usb_gone;
1322
1323 if (!usb_gone)
1324 usb_autopm_get_interface(serial->parent->interface);
1325
1326 /* reset the rts and dtr */
1327 /* do the actual close */
1328 serial->port.count--;
1329
1330 if (serial->port.count <= 0) {
1331 serial->port.count = 0;
1332 tty_port_tty_set(&serial->port, NULL);
1333 if (!usb_gone)
1334 hso_stop_serial_device(serial->parent);
1335 tasklet_kill(&serial->unthrottle_tasklet);
1336 }
1337
1338 if (!usb_gone)
1339 usb_autopm_put_interface(serial->parent->interface);
1340
1341 mutex_unlock(&serial->parent->mutex);
1342 }
1343
1344 /* close the requested serial port */
1345 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1346 int count)
1347 {
1348 struct hso_serial *serial = tty->driver_data;
1349 int space, tx_bytes;
1350 unsigned long flags;
1351
1352 /* sanity check */
1353 if (serial == NULL) {
1354 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1355 return -ENODEV;
1356 }
1357
1358 spin_lock_irqsave(&serial->serial_lock, flags);
1359
1360 space = serial->tx_data_length - serial->tx_buffer_count;
1361 tx_bytes = (count < space) ? count : space;
1362
1363 if (!tx_bytes)
1364 goto out;
1365
1366 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1367 serial->tx_buffer_count += tx_bytes;
1368
1369 out:
1370 spin_unlock_irqrestore(&serial->serial_lock, flags);
1371
1372 hso_kick_transmit(serial);
1373 /* done */
1374 return tx_bytes;
1375 }
1376
1377 /* how much room is there for writing */
1378 static int hso_serial_write_room(struct tty_struct *tty)
1379 {
1380 struct hso_serial *serial = tty->driver_data;
1381 int room;
1382 unsigned long flags;
1383
1384 spin_lock_irqsave(&serial->serial_lock, flags);
1385 room = serial->tx_data_length - serial->tx_buffer_count;
1386 spin_unlock_irqrestore(&serial->serial_lock, flags);
1387
1388 /* return free room */
1389 return room;
1390 }
1391
1392 static void hso_serial_cleanup(struct tty_struct *tty)
1393 {
1394 struct hso_serial *serial = tty->driver_data;
1395
1396 if (!serial)
1397 return;
1398
1399 kref_put(&serial->parent->ref, hso_serial_ref_free);
1400 }
1401
1402 /* setup the term */
1403 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1404 {
1405 struct hso_serial *serial = tty->driver_data;
1406 unsigned long flags;
1407
1408 if (old)
1409 D5("Termios called with: cflags new[%d] - old[%d]",
1410 tty->termios.c_cflag, old->c_cflag);
1411
1412 /* the actual setup */
1413 spin_lock_irqsave(&serial->serial_lock, flags);
1414 if (serial->port.count)
1415 _hso_serial_set_termios(tty, old);
1416 else
1417 tty->termios = *old;
1418 spin_unlock_irqrestore(&serial->serial_lock, flags);
1419
1420 /* done */
1421 }
1422
1423 /* how many characters in the buffer */
1424 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1425 {
1426 struct hso_serial *serial = tty->driver_data;
1427 int chars;
1428 unsigned long flags;
1429
1430 /* sanity check */
1431 if (serial == NULL)
1432 return 0;
1433
1434 spin_lock_irqsave(&serial->serial_lock, flags);
1435 chars = serial->tx_buffer_count;
1436 spin_unlock_irqrestore(&serial->serial_lock, flags);
1437
1438 return chars;
1439 }
1440 static int tiocmget_submit_urb(struct hso_serial *serial,
1441 struct hso_tiocmget *tiocmget,
1442 struct usb_device *usb)
1443 {
1444 int result;
1445
1446 if (serial->parent->usb_gone)
1447 return -ENODEV;
1448 usb_fill_int_urb(tiocmget->urb, usb,
1449 usb_rcvintpipe(usb,
1450 tiocmget->endp->
1451 bEndpointAddress & 0x7F),
1452 &tiocmget->serial_state_notification,
1453 sizeof(struct hso_serial_state_notification),
1454 tiocmget_intr_callback, serial,
1455 tiocmget->endp->bInterval);
1456 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1457 if (result) {
1458 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1459 result);
1460 }
1461 return result;
1462
1463 }
1464
1465 static void tiocmget_intr_callback(struct urb *urb)
1466 {
1467 struct hso_serial *serial = urb->context;
1468 struct hso_tiocmget *tiocmget;
1469 int status = urb->status;
1470 u16 UART_state_bitmap, prev_UART_state_bitmap;
1471 struct uart_icount *icount;
1472 struct hso_serial_state_notification *serial_state_notification;
1473 struct usb_device *usb;
1474 int if_num;
1475
1476 /* Sanity checks */
1477 if (!serial)
1478 return;
1479 if (status) {
1480 handle_usb_error(status, __func__, serial->parent);
1481 return;
1482 }
1483
1484 /* tiocmget is only supported on HSO_PORT_MODEM */
1485 tiocmget = serial->tiocmget;
1486 if (!tiocmget)
1487 return;
1488 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
1489
1490 usb = serial->parent->usb;
1491 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1492
1493 /* wIndex should be the USB interface number of the port to which the
1494 * notification applies, which should always be the Modem port.
1495 */
1496 serial_state_notification = &tiocmget->serial_state_notification;
1497 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1498 serial_state_notification->bNotification != B_NOTIFICATION ||
1499 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1500 le16_to_cpu(serial_state_notification->wIndex) != if_num ||
1501 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1502 dev_warn(&usb->dev,
1503 "hso received invalid serial state notification\n");
1504 DUMP(serial_state_notification,
1505 sizeof(struct hso_serial_state_notification));
1506 } else {
1507
1508 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1509 UART_state_bitmap);
1510 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1511 icount = &tiocmget->icount;
1512 spin_lock(&serial->serial_lock);
1513 if ((UART_state_bitmap & B_OVERRUN) !=
1514 (prev_UART_state_bitmap & B_OVERRUN))
1515 icount->parity++;
1516 if ((UART_state_bitmap & B_PARITY) !=
1517 (prev_UART_state_bitmap & B_PARITY))
1518 icount->parity++;
1519 if ((UART_state_bitmap & B_FRAMING) !=
1520 (prev_UART_state_bitmap & B_FRAMING))
1521 icount->frame++;
1522 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1523 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1524 icount->rng++;
1525 if ((UART_state_bitmap & B_BREAK) !=
1526 (prev_UART_state_bitmap & B_BREAK))
1527 icount->brk++;
1528 if ((UART_state_bitmap & B_TX_CARRIER) !=
1529 (prev_UART_state_bitmap & B_TX_CARRIER))
1530 icount->dsr++;
1531 if ((UART_state_bitmap & B_RX_CARRIER) !=
1532 (prev_UART_state_bitmap & B_RX_CARRIER))
1533 icount->dcd++;
1534 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1535 spin_unlock(&serial->serial_lock);
1536 tiocmget->intr_completed = 1;
1537 wake_up_interruptible(&tiocmget->waitq);
1538 }
1539 memset(serial_state_notification, 0,
1540 sizeof(struct hso_serial_state_notification));
1541 tiocmget_submit_urb(serial,
1542 tiocmget,
1543 serial->parent->usb);
1544 }
1545
1546 /*
1547 * next few functions largely stolen from drivers/serial/serial_core.c
1548 */
1549 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1550 * - mask passed in arg for lines of interest
1551 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1552 * Caller should use TIOCGICOUNT to see which one it was
1553 */
1554 static int
1555 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1556 {
1557 DECLARE_WAITQUEUE(wait, current);
1558 struct uart_icount cprev, cnow;
1559 struct hso_tiocmget *tiocmget;
1560 int ret;
1561
1562 tiocmget = serial->tiocmget;
1563 if (!tiocmget)
1564 return -ENOENT;
1565 /*
1566 * note the counters on entry
1567 */
1568 spin_lock_irq(&serial->serial_lock);
1569 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1570 spin_unlock_irq(&serial->serial_lock);
1571 add_wait_queue(&tiocmget->waitq, &wait);
1572 for (;;) {
1573 spin_lock_irq(&serial->serial_lock);
1574 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1575 spin_unlock_irq(&serial->serial_lock);
1576 set_current_state(TASK_INTERRUPTIBLE);
1577 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1578 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1579 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1580 ret = 0;
1581 break;
1582 }
1583 schedule();
1584 /* see if a signal did it */
1585 if (signal_pending(current)) {
1586 ret = -ERESTARTSYS;
1587 break;
1588 }
1589 cprev = cnow;
1590 }
1591 current->state = TASK_RUNNING;
1592 remove_wait_queue(&tiocmget->waitq, &wait);
1593
1594 return ret;
1595 }
1596
1597 /*
1598 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1599 * Return: write counters to the user passed counter struct
1600 * NB: both 1->0 and 0->1 transitions are counted except for
1601 * RI where only 0->1 is counted.
1602 */
1603 static int hso_get_count(struct tty_struct *tty,
1604 struct serial_icounter_struct *icount)
1605 {
1606 struct uart_icount cnow;
1607 struct hso_serial *serial = tty->driver_data;
1608 struct hso_tiocmget *tiocmget = serial->tiocmget;
1609
1610 memset(icount, 0, sizeof(struct serial_icounter_struct));
1611
1612 if (!tiocmget)
1613 return -ENOENT;
1614 spin_lock_irq(&serial->serial_lock);
1615 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1616 spin_unlock_irq(&serial->serial_lock);
1617
1618 icount->cts = cnow.cts;
1619 icount->dsr = cnow.dsr;
1620 icount->rng = cnow.rng;
1621 icount->dcd = cnow.dcd;
1622 icount->rx = cnow.rx;
1623 icount->tx = cnow.tx;
1624 icount->frame = cnow.frame;
1625 icount->overrun = cnow.overrun;
1626 icount->parity = cnow.parity;
1627 icount->brk = cnow.brk;
1628 icount->buf_overrun = cnow.buf_overrun;
1629
1630 return 0;
1631 }
1632
1633
1634 static int hso_serial_tiocmget(struct tty_struct *tty)
1635 {
1636 int retval;
1637 struct hso_serial *serial = tty->driver_data;
1638 struct hso_tiocmget *tiocmget;
1639 u16 UART_state_bitmap;
1640
1641 /* sanity check */
1642 if (!serial) {
1643 D1("no tty structures");
1644 return -EINVAL;
1645 }
1646 spin_lock_irq(&serial->serial_lock);
1647 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1648 ((serial->dtr_state) ? TIOCM_DTR : 0);
1649 tiocmget = serial->tiocmget;
1650 if (tiocmget) {
1651
1652 UART_state_bitmap = le16_to_cpu(
1653 tiocmget->prev_UART_state_bitmap);
1654 if (UART_state_bitmap & B_RING_SIGNAL)
1655 retval |= TIOCM_RNG;
1656 if (UART_state_bitmap & B_RX_CARRIER)
1657 retval |= TIOCM_CD;
1658 if (UART_state_bitmap & B_TX_CARRIER)
1659 retval |= TIOCM_DSR;
1660 }
1661 spin_unlock_irq(&serial->serial_lock);
1662 return retval;
1663 }
1664
1665 static int hso_serial_tiocmset(struct tty_struct *tty,
1666 unsigned int set, unsigned int clear)
1667 {
1668 int val = 0;
1669 unsigned long flags;
1670 int if_num;
1671 struct hso_serial *serial = tty->driver_data;
1672
1673 /* sanity check */
1674 if (!serial) {
1675 D1("no tty structures");
1676 return -EINVAL;
1677 }
1678
1679 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1680 return -EINVAL;
1681
1682 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1683
1684 spin_lock_irqsave(&serial->serial_lock, flags);
1685 if (set & TIOCM_RTS)
1686 serial->rts_state = 1;
1687 if (set & TIOCM_DTR)
1688 serial->dtr_state = 1;
1689
1690 if (clear & TIOCM_RTS)
1691 serial->rts_state = 0;
1692 if (clear & TIOCM_DTR)
1693 serial->dtr_state = 0;
1694
1695 if (serial->dtr_state)
1696 val |= 0x01;
1697 if (serial->rts_state)
1698 val |= 0x02;
1699
1700 spin_unlock_irqrestore(&serial->serial_lock, flags);
1701
1702 return usb_control_msg(serial->parent->usb,
1703 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1704 0x21, val, if_num, NULL, 0,
1705 USB_CTRL_SET_TIMEOUT);
1706 }
1707
1708 static int hso_serial_ioctl(struct tty_struct *tty,
1709 unsigned int cmd, unsigned long arg)
1710 {
1711 struct hso_serial *serial = tty->driver_data;
1712 int ret = 0;
1713 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1714
1715 if (!serial)
1716 return -ENODEV;
1717 switch (cmd) {
1718 case TIOCMIWAIT:
1719 ret = hso_wait_modem_status(serial, arg);
1720 break;
1721 default:
1722 ret = -ENOIOCTLCMD;
1723 break;
1724 }
1725 return ret;
1726 }
1727
1728
1729 /* starts a transmit */
1730 static void hso_kick_transmit(struct hso_serial *serial)
1731 {
1732 u8 *temp;
1733 unsigned long flags;
1734 int res;
1735
1736 spin_lock_irqsave(&serial->serial_lock, flags);
1737 if (!serial->tx_buffer_count)
1738 goto out;
1739
1740 if (serial->tx_urb_used)
1741 goto out;
1742
1743 /* Wakeup USB interface if necessary */
1744 if (hso_get_activity(serial->parent) == -EAGAIN)
1745 goto out;
1746
1747 /* Switch pointers around to avoid memcpy */
1748 temp = serial->tx_buffer;
1749 serial->tx_buffer = serial->tx_data;
1750 serial->tx_data = temp;
1751 serial->tx_data_count = serial->tx_buffer_count;
1752 serial->tx_buffer_count = 0;
1753
1754 /* If temp is set, it means we switched buffers */
1755 if (temp && serial->write_data) {
1756 res = serial->write_data(serial);
1757 if (res >= 0)
1758 serial->tx_urb_used = 1;
1759 }
1760 out:
1761 spin_unlock_irqrestore(&serial->serial_lock, flags);
1762 }
1763
1764 /* make a request (for reading and writing data to muxed serial port) */
1765 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1766 struct urb *ctrl_urb,
1767 struct usb_ctrlrequest *ctrl_req,
1768 u8 *ctrl_urb_data, u32 size)
1769 {
1770 int result;
1771 int pipe;
1772
1773 /* Sanity check */
1774 if (!serial || !ctrl_urb || !ctrl_req) {
1775 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1776 return -EINVAL;
1777 }
1778
1779 /* initialize */
1780 ctrl_req->wValue = 0;
1781 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1782 ctrl_req->wLength = cpu_to_le16(size);
1783
1784 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1785 /* Reading command */
1786 ctrl_req->bRequestType = USB_DIR_IN |
1787 USB_TYPE_OPTION_VENDOR |
1788 USB_RECIP_INTERFACE;
1789 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1790 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1791 } else {
1792 /* Writing command */
1793 ctrl_req->bRequestType = USB_DIR_OUT |
1794 USB_TYPE_OPTION_VENDOR |
1795 USB_RECIP_INTERFACE;
1796 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1797 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1798 }
1799 /* syslog */
1800 D2("%s command (%02x) len: %d, port: %d",
1801 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1802 ctrl_req->bRequestType, ctrl_req->wLength, port);
1803
1804 /* Load ctrl urb */
1805 ctrl_urb->transfer_flags = 0;
1806 usb_fill_control_urb(ctrl_urb,
1807 serial->parent->usb,
1808 pipe,
1809 (u8 *) ctrl_req,
1810 ctrl_urb_data, size, ctrl_callback, serial);
1811 /* Send it on merry way */
1812 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1813 if (result) {
1814 dev_err(&ctrl_urb->dev->dev,
1815 "%s failed submit ctrl_urb %d type %d\n", __func__,
1816 result, type);
1817 return result;
1818 }
1819
1820 /* done */
1821 return size;
1822 }
1823
1824 /* called by intr_callback when read occurs */
1825 static int hso_mux_serial_read(struct hso_serial *serial)
1826 {
1827 if (!serial)
1828 return -EINVAL;
1829
1830 /* clean data */
1831 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1832 /* make the request */
1833
1834 if (serial->num_rx_urbs != 1) {
1835 dev_err(&serial->parent->interface->dev,
1836 "ERROR: mux'd reads with multiple buffers "
1837 "not possible\n");
1838 return 0;
1839 }
1840 return mux_device_request(serial,
1841 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1842 serial->parent->port_spec & HSO_PORT_MASK,
1843 serial->rx_urb[0],
1844 &serial->ctrl_req_rx,
1845 serial->rx_data[0], serial->rx_data_length);
1846 }
1847
1848 /* used for muxed serial port callback (muxed serial read) */
1849 static void intr_callback(struct urb *urb)
1850 {
1851 struct hso_shared_int *shared_int = urb->context;
1852 struct hso_serial *serial;
1853 unsigned char *port_req;
1854 int status = urb->status;
1855 int i;
1856
1857 usb_mark_last_busy(urb->dev);
1858
1859 /* sanity check */
1860 if (!shared_int)
1861 return;
1862
1863 /* status check */
1864 if (status) {
1865 handle_usb_error(status, __func__, NULL);
1866 return;
1867 }
1868 D4("\n--- Got intr callback 0x%02X ---", status);
1869
1870 /* what request? */
1871 port_req = urb->transfer_buffer;
1872 D4(" port_req = 0x%.2X\n", *port_req);
1873 /* loop over all muxed ports to find the one sending this */
1874 for (i = 0; i < 8; i++) {
1875 /* max 8 channels on MUX */
1876 if (*port_req & (1 << i)) {
1877 serial = get_serial_by_shared_int_and_type(shared_int,
1878 (1 << i));
1879 if (serial != NULL) {
1880 D1("Pending read interrupt on port %d\n", i);
1881 spin_lock(&serial->serial_lock);
1882 if (serial->rx_state == RX_IDLE &&
1883 serial->port.count > 0) {
1884 /* Setup and send a ctrl req read on
1885 * port i */
1886 if (!serial->rx_urb_filled[0]) {
1887 serial->rx_state = RX_SENT;
1888 hso_mux_serial_read(serial);
1889 } else
1890 serial->rx_state = RX_PENDING;
1891 } else {
1892 D1("Already a read pending on "
1893 "port %d or port not open\n", i);
1894 }
1895 spin_unlock(&serial->serial_lock);
1896 }
1897 }
1898 }
1899 /* Resubmit interrupt urb */
1900 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1901 }
1902
1903 /* called for writing to muxed serial port */
1904 static int hso_mux_serial_write_data(struct hso_serial *serial)
1905 {
1906 if (NULL == serial)
1907 return -EINVAL;
1908
1909 return mux_device_request(serial,
1910 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1911 serial->parent->port_spec & HSO_PORT_MASK,
1912 serial->tx_urb,
1913 &serial->ctrl_req_tx,
1914 serial->tx_data, serial->tx_data_count);
1915 }
1916
1917 /* write callback for Diag and CS port */
1918 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1919 {
1920 struct hso_serial *serial = urb->context;
1921 int status = urb->status;
1922
1923 /* sanity check */
1924 if (!serial) {
1925 D1("serial == NULL");
1926 return;
1927 }
1928
1929 spin_lock(&serial->serial_lock);
1930 serial->tx_urb_used = 0;
1931 spin_unlock(&serial->serial_lock);
1932 if (status) {
1933 handle_usb_error(status, __func__, serial->parent);
1934 return;
1935 }
1936 hso_put_activity(serial->parent);
1937 tty_port_tty_wakeup(&serial->port);
1938 hso_kick_transmit(serial);
1939
1940 D1(" ");
1941 }
1942
1943 /* called for writing diag or CS serial port */
1944 static int hso_std_serial_write_data(struct hso_serial *serial)
1945 {
1946 int count = serial->tx_data_count;
1947 int result;
1948
1949 usb_fill_bulk_urb(serial->tx_urb,
1950 serial->parent->usb,
1951 usb_sndbulkpipe(serial->parent->usb,
1952 serial->out_endp->
1953 bEndpointAddress & 0x7F),
1954 serial->tx_data, serial->tx_data_count,
1955 hso_std_serial_write_bulk_callback, serial);
1956
1957 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1958 if (result) {
1959 dev_warn(&serial->parent->usb->dev,
1960 "Failed to submit urb - res %d\n", result);
1961 return result;
1962 }
1963
1964 return count;
1965 }
1966
1967 /* callback after read or write on muxed serial port */
1968 static void ctrl_callback(struct urb *urb)
1969 {
1970 struct hso_serial *serial = urb->context;
1971 struct usb_ctrlrequest *req;
1972 int status = urb->status;
1973
1974 /* sanity check */
1975 if (!serial)
1976 return;
1977
1978 spin_lock(&serial->serial_lock);
1979 serial->tx_urb_used = 0;
1980 spin_unlock(&serial->serial_lock);
1981 if (status) {
1982 handle_usb_error(status, __func__, serial->parent);
1983 return;
1984 }
1985
1986 /* what request? */
1987 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1988 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
1989 D4("Actual length of urb = %d\n", urb->actual_length);
1990 DUMP1(urb->transfer_buffer, urb->actual_length);
1991
1992 if (req->bRequestType ==
1993 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
1994 /* response to a read command */
1995 serial->rx_urb_filled[0] = 1;
1996 spin_lock(&serial->serial_lock);
1997 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1998 spin_unlock(&serial->serial_lock);
1999 } else {
2000 hso_put_activity(serial->parent);
2001 tty_port_tty_wakeup(&serial->port);
2002 /* response to a write command */
2003 hso_kick_transmit(serial);
2004 }
2005 }
2006
2007 /* handle RX data for serial port */
2008 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2009 {
2010 struct tty_struct *tty;
2011 int count;
2012
2013 /* Sanity check */
2014 if (urb == NULL || serial == NULL) {
2015 D1("serial = NULL");
2016 return -2;
2017 }
2018
2019 tty = tty_port_tty_get(&serial->port);
2020
2021 if (tty && test_bit(TTY_THROTTLED, &tty->flags)) {
2022 tty_kref_put(tty);
2023 return -1;
2024 }
2025
2026 /* Push data to tty */
2027 D1("data to push to tty");
2028 count = tty_buffer_request_room(&serial->port, urb->actual_length);
2029 if (count >= urb->actual_length) {
2030 tty_insert_flip_string(&serial->port, urb->transfer_buffer,
2031 urb->actual_length);
2032 tty_flip_buffer_push(&serial->port);
2033 } else {
2034 dev_warn(&serial->parent->usb->dev,
2035 "dropping data, %d bytes lost\n", urb->actual_length);
2036 }
2037
2038 tty_kref_put(tty);
2039
2040 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2041
2042 return 0;
2043 }
2044
2045
2046 /* Base driver functions */
2047
2048 static void hso_log_port(struct hso_device *hso_dev)
2049 {
2050 char *port_type;
2051 char port_dev[20];
2052
2053 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2054 case HSO_PORT_CONTROL:
2055 port_type = "Control";
2056 break;
2057 case HSO_PORT_APP:
2058 port_type = "Application";
2059 break;
2060 case HSO_PORT_GPS:
2061 port_type = "GPS";
2062 break;
2063 case HSO_PORT_GPS_CONTROL:
2064 port_type = "GPS control";
2065 break;
2066 case HSO_PORT_APP2:
2067 port_type = "Application2";
2068 break;
2069 case HSO_PORT_PCSC:
2070 port_type = "PCSC";
2071 break;
2072 case HSO_PORT_DIAG:
2073 port_type = "Diagnostic";
2074 break;
2075 case HSO_PORT_DIAG2:
2076 port_type = "Diagnostic2";
2077 break;
2078 case HSO_PORT_MODEM:
2079 port_type = "Modem";
2080 break;
2081 case HSO_PORT_NETWORK:
2082 port_type = "Network";
2083 break;
2084 default:
2085 port_type = "Unknown";
2086 break;
2087 }
2088 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2089 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2090 } else
2091 sprintf(port_dev, "/dev/%s%d", tty_filename,
2092 dev2ser(hso_dev)->minor);
2093
2094 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2095 port_type, port_dev);
2096 }
2097
2098 static int hso_start_net_device(struct hso_device *hso_dev)
2099 {
2100 int i, result = 0;
2101 struct hso_net *hso_net = dev2net(hso_dev);
2102
2103 if (!hso_net)
2104 return -ENODEV;
2105
2106 /* send URBs for all read buffers */
2107 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2108
2109 /* Prep a receive URB */
2110 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2111 hso_dev->usb,
2112 usb_rcvbulkpipe(hso_dev->usb,
2113 hso_net->in_endp->
2114 bEndpointAddress & 0x7F),
2115 hso_net->mux_bulk_rx_buf_pool[i],
2116 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2117 hso_net);
2118
2119 /* Put it out there so the device can send us stuff */
2120 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2121 GFP_NOIO);
2122 if (result)
2123 dev_warn(&hso_dev->usb->dev,
2124 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2125 i, result);
2126 }
2127
2128 return result;
2129 }
2130
2131 static int hso_stop_net_device(struct hso_device *hso_dev)
2132 {
2133 int i;
2134 struct hso_net *hso_net = dev2net(hso_dev);
2135
2136 if (!hso_net)
2137 return -ENODEV;
2138
2139 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2140 if (hso_net->mux_bulk_rx_urb_pool[i])
2141 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2142
2143 }
2144 if (hso_net->mux_bulk_tx_urb)
2145 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2146
2147 return 0;
2148 }
2149
2150 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2151 {
2152 int i, result = 0;
2153 struct hso_serial *serial = dev2ser(hso_dev);
2154
2155 if (!serial)
2156 return -ENODEV;
2157
2158 /* If it is not the MUX port fill in and submit a bulk urb (already
2159 * allocated in hso_serial_start) */
2160 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2161 for (i = 0; i < serial->num_rx_urbs; i++) {
2162 usb_fill_bulk_urb(serial->rx_urb[i],
2163 serial->parent->usb,
2164 usb_rcvbulkpipe(serial->parent->usb,
2165 serial->in_endp->
2166 bEndpointAddress &
2167 0x7F),
2168 serial->rx_data[i],
2169 serial->rx_data_length,
2170 hso_std_serial_read_bulk_callback,
2171 serial);
2172 result = usb_submit_urb(serial->rx_urb[i], flags);
2173 if (result) {
2174 dev_warn(&serial->parent->usb->dev,
2175 "Failed to submit urb - res %d\n",
2176 result);
2177 break;
2178 }
2179 }
2180 } else {
2181 mutex_lock(&serial->shared_int->shared_int_lock);
2182 if (!serial->shared_int->use_count) {
2183 result =
2184 hso_mux_submit_intr_urb(serial->shared_int,
2185 hso_dev->usb, flags);
2186 }
2187 serial->shared_int->use_count++;
2188 mutex_unlock(&serial->shared_int->shared_int_lock);
2189 }
2190 if (serial->tiocmget)
2191 tiocmget_submit_urb(serial,
2192 serial->tiocmget,
2193 serial->parent->usb);
2194 return result;
2195 }
2196
2197 static int hso_stop_serial_device(struct hso_device *hso_dev)
2198 {
2199 int i;
2200 struct hso_serial *serial = dev2ser(hso_dev);
2201 struct hso_tiocmget *tiocmget;
2202
2203 if (!serial)
2204 return -ENODEV;
2205
2206 for (i = 0; i < serial->num_rx_urbs; i++) {
2207 if (serial->rx_urb[i]) {
2208 usb_kill_urb(serial->rx_urb[i]);
2209 serial->rx_urb_filled[i] = 0;
2210 }
2211 }
2212 serial->curr_rx_urb_idx = 0;
2213
2214 if (serial->tx_urb)
2215 usb_kill_urb(serial->tx_urb);
2216
2217 if (serial->shared_int) {
2218 mutex_lock(&serial->shared_int->shared_int_lock);
2219 if (serial->shared_int->use_count &&
2220 (--serial->shared_int->use_count == 0)) {
2221 struct urb *urb;
2222
2223 urb = serial->shared_int->shared_intr_urb;
2224 if (urb)
2225 usb_kill_urb(urb);
2226 }
2227 mutex_unlock(&serial->shared_int->shared_int_lock);
2228 }
2229 tiocmget = serial->tiocmget;
2230 if (tiocmget) {
2231 wake_up_interruptible(&tiocmget->waitq);
2232 usb_kill_urb(tiocmget->urb);
2233 }
2234
2235 return 0;
2236 }
2237
2238 static void hso_serial_common_free(struct hso_serial *serial)
2239 {
2240 int i;
2241
2242 if (serial->parent->dev)
2243 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2244
2245 tty_unregister_device(tty_drv, serial->minor);
2246
2247 for (i = 0; i < serial->num_rx_urbs; i++) {
2248 /* unlink and free RX URB */
2249 usb_free_urb(serial->rx_urb[i]);
2250 /* free the RX buffer */
2251 kfree(serial->rx_data[i]);
2252 }
2253
2254 /* unlink and free TX URB */
2255 usb_free_urb(serial->tx_urb);
2256 kfree(serial->tx_data);
2257 tty_port_destroy(&serial->port);
2258 }
2259
2260 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2261 int rx_size, int tx_size)
2262 {
2263 struct device *dev;
2264 int minor;
2265 int i;
2266
2267 tty_port_init(&serial->port);
2268
2269 minor = get_free_serial_index();
2270 if (minor < 0)
2271 goto exit;
2272
2273 /* register our minor number */
2274 serial->parent->dev = tty_port_register_device(&serial->port, tty_drv,
2275 minor, &serial->parent->interface->dev);
2276 dev = serial->parent->dev;
2277 dev_set_drvdata(dev, serial->parent);
2278 i = device_create_file(dev, &dev_attr_hsotype);
2279
2280 /* fill in specific data for later use */
2281 serial->minor = minor;
2282 serial->magic = HSO_SERIAL_MAGIC;
2283 spin_lock_init(&serial->serial_lock);
2284 serial->num_rx_urbs = num_urbs;
2285
2286 /* RX, allocate urb and initialize */
2287
2288 /* prepare our RX buffer */
2289 serial->rx_data_length = rx_size;
2290 for (i = 0; i < serial->num_rx_urbs; i++) {
2291 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2292 if (!serial->rx_urb[i]) {
2293 dev_err(dev, "Could not allocate urb?\n");
2294 goto exit;
2295 }
2296 serial->rx_urb[i]->transfer_buffer = NULL;
2297 serial->rx_urb[i]->transfer_buffer_length = 0;
2298 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2299 GFP_KERNEL);
2300 if (!serial->rx_data[i])
2301 goto exit;
2302 }
2303
2304 /* TX, allocate urb and initialize */
2305 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2306 if (!serial->tx_urb) {
2307 dev_err(dev, "Could not allocate urb?\n");
2308 goto exit;
2309 }
2310 serial->tx_urb->transfer_buffer = NULL;
2311 serial->tx_urb->transfer_buffer_length = 0;
2312 /* prepare our TX buffer */
2313 serial->tx_data_count = 0;
2314 serial->tx_buffer_count = 0;
2315 serial->tx_data_length = tx_size;
2316 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2317 if (!serial->tx_data)
2318 goto exit;
2319
2320 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2321 if (!serial->tx_buffer)
2322 goto exit;
2323
2324 return 0;
2325 exit:
2326 hso_serial_common_free(serial);
2327 return -1;
2328 }
2329
2330 /* Creates a general hso device */
2331 static struct hso_device *hso_create_device(struct usb_interface *intf,
2332 int port_spec)
2333 {
2334 struct hso_device *hso_dev;
2335
2336 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2337 if (!hso_dev)
2338 return NULL;
2339
2340 hso_dev->port_spec = port_spec;
2341 hso_dev->usb = interface_to_usbdev(intf);
2342 hso_dev->interface = intf;
2343 kref_init(&hso_dev->ref);
2344 mutex_init(&hso_dev->mutex);
2345
2346 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2347 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2348 INIT_WORK(&hso_dev->reset_device, reset_device);
2349
2350 return hso_dev;
2351 }
2352
2353 /* Removes a network device in the network device table */
2354 static int remove_net_device(struct hso_device *hso_dev)
2355 {
2356 int i;
2357
2358 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2359 if (network_table[i] == hso_dev) {
2360 network_table[i] = NULL;
2361 break;
2362 }
2363 }
2364 if (i == HSO_MAX_NET_DEVICES)
2365 return -1;
2366 return 0;
2367 }
2368
2369 /* Frees our network device */
2370 static void hso_free_net_device(struct hso_device *hso_dev)
2371 {
2372 int i;
2373 struct hso_net *hso_net = dev2net(hso_dev);
2374
2375 if (!hso_net)
2376 return;
2377
2378 remove_net_device(hso_net->parent);
2379
2380 if (hso_net->net)
2381 unregister_netdev(hso_net->net);
2382
2383 /* start freeing */
2384 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2385 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2386 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2387 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2388 }
2389 usb_free_urb(hso_net->mux_bulk_tx_urb);
2390 kfree(hso_net->mux_bulk_tx_buf);
2391 hso_net->mux_bulk_tx_buf = NULL;
2392
2393 if (hso_net->net)
2394 free_netdev(hso_net->net);
2395
2396 kfree(hso_dev);
2397 }
2398
2399 static const struct net_device_ops hso_netdev_ops = {
2400 .ndo_open = hso_net_open,
2401 .ndo_stop = hso_net_close,
2402 .ndo_start_xmit = hso_net_start_xmit,
2403 .ndo_tx_timeout = hso_net_tx_timeout,
2404 };
2405
2406 /* initialize the network interface */
2407 static void hso_net_init(struct net_device *net)
2408 {
2409 struct hso_net *hso_net = netdev_priv(net);
2410
2411 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2412
2413 /* fill in the other fields */
2414 net->netdev_ops = &hso_netdev_ops;
2415 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2416 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2417 net->type = ARPHRD_NONE;
2418 net->mtu = DEFAULT_MTU - 14;
2419 net->tx_queue_len = 10;
2420 net->ethtool_ops = &ops;
2421
2422 /* and initialize the semaphore */
2423 spin_lock_init(&hso_net->net_lock);
2424 }
2425
2426 /* Adds a network device in the network device table */
2427 static int add_net_device(struct hso_device *hso_dev)
2428 {
2429 int i;
2430
2431 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2432 if (network_table[i] == NULL) {
2433 network_table[i] = hso_dev;
2434 break;
2435 }
2436 }
2437 if (i == HSO_MAX_NET_DEVICES)
2438 return -1;
2439 return 0;
2440 }
2441
2442 static int hso_rfkill_set_block(void *data, bool blocked)
2443 {
2444 struct hso_device *hso_dev = data;
2445 int enabled = !blocked;
2446 int rv;
2447
2448 mutex_lock(&hso_dev->mutex);
2449 if (hso_dev->usb_gone)
2450 rv = 0;
2451 else
2452 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2453 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2454 USB_CTRL_SET_TIMEOUT);
2455 mutex_unlock(&hso_dev->mutex);
2456 return rv;
2457 }
2458
2459 static const struct rfkill_ops hso_rfkill_ops = {
2460 .set_block = hso_rfkill_set_block,
2461 };
2462
2463 /* Creates and sets up everything for rfkill */
2464 static void hso_create_rfkill(struct hso_device *hso_dev,
2465 struct usb_interface *interface)
2466 {
2467 struct hso_net *hso_net = dev2net(hso_dev);
2468 struct device *dev = &hso_net->net->dev;
2469 char *rfkn;
2470
2471 rfkn = kzalloc(20, GFP_KERNEL);
2472 if (!rfkn)
2473 dev_err(dev, "%s - Out of memory\n", __func__);
2474
2475 snprintf(rfkn, 20, "hso-%d",
2476 interface->altsetting->desc.bInterfaceNumber);
2477
2478 hso_net->rfkill = rfkill_alloc(rfkn,
2479 &interface_to_usbdev(interface)->dev,
2480 RFKILL_TYPE_WWAN,
2481 &hso_rfkill_ops, hso_dev);
2482 if (!hso_net->rfkill) {
2483 dev_err(dev, "%s - Out of memory\n", __func__);
2484 kfree(rfkn);
2485 return;
2486 }
2487 if (rfkill_register(hso_net->rfkill) < 0) {
2488 rfkill_destroy(hso_net->rfkill);
2489 kfree(rfkn);
2490 hso_net->rfkill = NULL;
2491 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2492 return;
2493 }
2494 }
2495
2496 static struct device_type hso_type = {
2497 .name = "wwan",
2498 };
2499
2500 /* Creates our network device */
2501 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2502 int port_spec)
2503 {
2504 int result, i;
2505 struct net_device *net;
2506 struct hso_net *hso_net;
2507 struct hso_device *hso_dev;
2508
2509 hso_dev = hso_create_device(interface, port_spec);
2510 if (!hso_dev)
2511 return NULL;
2512
2513 /* allocate our network device, then we can put in our private data */
2514 /* call hso_net_init to do the basic initialization */
2515 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN,
2516 hso_net_init);
2517 if (!net) {
2518 dev_err(&interface->dev, "Unable to create ethernet device\n");
2519 goto exit;
2520 }
2521
2522 hso_net = netdev_priv(net);
2523
2524 hso_dev->port_data.dev_net = hso_net;
2525 hso_net->net = net;
2526 hso_net->parent = hso_dev;
2527
2528 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2529 USB_DIR_IN);
2530 if (!hso_net->in_endp) {
2531 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2532 goto exit;
2533 }
2534 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2535 USB_DIR_OUT);
2536 if (!hso_net->out_endp) {
2537 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2538 goto exit;
2539 }
2540 SET_NETDEV_DEV(net, &interface->dev);
2541 SET_NETDEV_DEVTYPE(net, &hso_type);
2542
2543 /* registering our net device */
2544 result = register_netdev(net);
2545 if (result) {
2546 dev_err(&interface->dev, "Failed to register device\n");
2547 goto exit;
2548 }
2549
2550 /* start allocating */
2551 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2552 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2553 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2554 dev_err(&interface->dev, "Could not allocate rx urb\n");
2555 goto exit;
2556 }
2557 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2558 GFP_KERNEL);
2559 if (!hso_net->mux_bulk_rx_buf_pool[i])
2560 goto exit;
2561 }
2562 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2563 if (!hso_net->mux_bulk_tx_urb) {
2564 dev_err(&interface->dev, "Could not allocate tx urb\n");
2565 goto exit;
2566 }
2567 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2568 if (!hso_net->mux_bulk_tx_buf)
2569 goto exit;
2570
2571 add_net_device(hso_dev);
2572
2573 hso_log_port(hso_dev);
2574
2575 hso_create_rfkill(hso_dev, interface);
2576
2577 return hso_dev;
2578 exit:
2579 hso_free_net_device(hso_dev);
2580 return NULL;
2581 }
2582
2583 static void hso_free_tiomget(struct hso_serial *serial)
2584 {
2585 struct hso_tiocmget *tiocmget;
2586 if (!serial)
2587 return;
2588 tiocmget = serial->tiocmget;
2589 if (tiocmget) {
2590 usb_free_urb(tiocmget->urb);
2591 tiocmget->urb = NULL;
2592 serial->tiocmget = NULL;
2593 kfree(tiocmget);
2594 }
2595 }
2596
2597 /* Frees an AT channel ( goes for both mux and non-mux ) */
2598 static void hso_free_serial_device(struct hso_device *hso_dev)
2599 {
2600 struct hso_serial *serial = dev2ser(hso_dev);
2601
2602 if (!serial)
2603 return;
2604 set_serial_by_index(serial->minor, NULL);
2605
2606 hso_serial_common_free(serial);
2607
2608 if (serial->shared_int) {
2609 mutex_lock(&serial->shared_int->shared_int_lock);
2610 if (--serial->shared_int->ref_count == 0)
2611 hso_free_shared_int(serial->shared_int);
2612 else
2613 mutex_unlock(&serial->shared_int->shared_int_lock);
2614 }
2615 hso_free_tiomget(serial);
2616 kfree(serial);
2617 kfree(hso_dev);
2618 }
2619
2620 /* Creates a bulk AT channel */
2621 static struct hso_device *hso_create_bulk_serial_device(
2622 struct usb_interface *interface, int port)
2623 {
2624 struct hso_device *hso_dev;
2625 struct hso_serial *serial;
2626 int num_urbs;
2627 struct hso_tiocmget *tiocmget;
2628
2629 hso_dev = hso_create_device(interface, port);
2630 if (!hso_dev)
2631 return NULL;
2632
2633 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2634 if (!serial)
2635 goto exit;
2636
2637 serial->parent = hso_dev;
2638 hso_dev->port_data.dev_serial = serial;
2639
2640 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2641 num_urbs = 2;
2642 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2643 GFP_KERNEL);
2644 /* it isn't going to break our heart if serial->tiocmget
2645 * allocation fails don't bother checking this.
2646 */
2647 if (serial->tiocmget) {
2648 tiocmget = serial->tiocmget;
2649 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2650 if (tiocmget->urb) {
2651 mutex_init(&tiocmget->mutex);
2652 init_waitqueue_head(&tiocmget->waitq);
2653 tiocmget->endp = hso_get_ep(
2654 interface,
2655 USB_ENDPOINT_XFER_INT,
2656 USB_DIR_IN);
2657 } else
2658 hso_free_tiomget(serial);
2659 }
2660 }
2661 else
2662 num_urbs = 1;
2663
2664 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2665 BULK_URB_TX_SIZE))
2666 goto exit;
2667
2668 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2669 USB_DIR_IN);
2670 if (!serial->in_endp) {
2671 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2672 goto exit2;
2673 }
2674
2675 if (!
2676 (serial->out_endp =
2677 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2678 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2679 goto exit2;
2680 }
2681
2682 serial->write_data = hso_std_serial_write_data;
2683
2684 /* and record this serial */
2685 set_serial_by_index(serial->minor, serial);
2686
2687 /* setup the proc dirs and files if needed */
2688 hso_log_port(hso_dev);
2689
2690 /* done, return it */
2691 return hso_dev;
2692
2693 exit2:
2694 hso_serial_common_free(serial);
2695 exit:
2696 hso_free_tiomget(serial);
2697 kfree(serial);
2698 kfree(hso_dev);
2699 return NULL;
2700 }
2701
2702 /* Creates a multiplexed AT channel */
2703 static
2704 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2705 int port,
2706 struct hso_shared_int *mux)
2707 {
2708 struct hso_device *hso_dev;
2709 struct hso_serial *serial;
2710 int port_spec;
2711
2712 port_spec = HSO_INTF_MUX;
2713 port_spec &= ~HSO_PORT_MASK;
2714
2715 port_spec |= hso_mux_to_port(port);
2716 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2717 return NULL;
2718
2719 hso_dev = hso_create_device(interface, port_spec);
2720 if (!hso_dev)
2721 return NULL;
2722
2723 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2724 if (!serial)
2725 goto exit;
2726
2727 hso_dev->port_data.dev_serial = serial;
2728 serial->parent = hso_dev;
2729
2730 if (hso_serial_common_create
2731 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2732 goto exit;
2733
2734 serial->tx_data_length--;
2735 serial->write_data = hso_mux_serial_write_data;
2736
2737 serial->shared_int = mux;
2738 mutex_lock(&serial->shared_int->shared_int_lock);
2739 serial->shared_int->ref_count++;
2740 mutex_unlock(&serial->shared_int->shared_int_lock);
2741
2742 /* and record this serial */
2743 set_serial_by_index(serial->minor, serial);
2744
2745 /* setup the proc dirs and files if needed */
2746 hso_log_port(hso_dev);
2747
2748 /* done, return it */
2749 return hso_dev;
2750
2751 exit:
2752 if (serial) {
2753 tty_unregister_device(tty_drv, serial->minor);
2754 kfree(serial);
2755 }
2756 kfree(hso_dev);
2757 return NULL;
2758
2759 }
2760
2761 static void hso_free_shared_int(struct hso_shared_int *mux)
2762 {
2763 usb_free_urb(mux->shared_intr_urb);
2764 kfree(mux->shared_intr_buf);
2765 mutex_unlock(&mux->shared_int_lock);
2766 kfree(mux);
2767 }
2768
2769 static
2770 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2771 {
2772 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2773
2774 if (!mux)
2775 return NULL;
2776
2777 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2778 USB_DIR_IN);
2779 if (!mux->intr_endp) {
2780 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2781 goto exit;
2782 }
2783
2784 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2785 if (!mux->shared_intr_urb) {
2786 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2787 goto exit;
2788 }
2789 mux->shared_intr_buf =
2790 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2791 GFP_KERNEL);
2792 if (!mux->shared_intr_buf)
2793 goto exit;
2794
2795 mutex_init(&mux->shared_int_lock);
2796
2797 return mux;
2798
2799 exit:
2800 kfree(mux->shared_intr_buf);
2801 usb_free_urb(mux->shared_intr_urb);
2802 kfree(mux);
2803 return NULL;
2804 }
2805
2806 /* Gets the port spec for a certain interface */
2807 static int hso_get_config_data(struct usb_interface *interface)
2808 {
2809 struct usb_device *usbdev = interface_to_usbdev(interface);
2810 u8 *config_data = kmalloc(17, GFP_KERNEL);
2811 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2812 s32 result;
2813
2814 if (!config_data)
2815 return -ENOMEM;
2816 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2817 0x86, 0xC0, 0, 0, config_data, 17,
2818 USB_CTRL_SET_TIMEOUT) != 0x11) {
2819 kfree(config_data);
2820 return -EIO;
2821 }
2822
2823 switch (config_data[if_num]) {
2824 case 0x0:
2825 result = 0;
2826 break;
2827 case 0x1:
2828 result = HSO_PORT_DIAG;
2829 break;
2830 case 0x2:
2831 result = HSO_PORT_GPS;
2832 break;
2833 case 0x3:
2834 result = HSO_PORT_GPS_CONTROL;
2835 break;
2836 case 0x4:
2837 result = HSO_PORT_APP;
2838 break;
2839 case 0x5:
2840 result = HSO_PORT_APP2;
2841 break;
2842 case 0x6:
2843 result = HSO_PORT_CONTROL;
2844 break;
2845 case 0x7:
2846 result = HSO_PORT_NETWORK;
2847 break;
2848 case 0x8:
2849 result = HSO_PORT_MODEM;
2850 break;
2851 case 0x9:
2852 result = HSO_PORT_MSD;
2853 break;
2854 case 0xa:
2855 result = HSO_PORT_PCSC;
2856 break;
2857 case 0xb:
2858 result = HSO_PORT_VOICE;
2859 break;
2860 default:
2861 result = 0;
2862 }
2863
2864 if (result)
2865 result |= HSO_INTF_BULK;
2866
2867 if (config_data[16] & 0x1)
2868 result |= HSO_INFO_CRC_BUG;
2869
2870 kfree(config_data);
2871 return result;
2872 }
2873
2874 /* called once for each interface upon device insertion */
2875 static int hso_probe(struct usb_interface *interface,
2876 const struct usb_device_id *id)
2877 {
2878 int mux, i, if_num, port_spec;
2879 unsigned char port_mask;
2880 struct hso_device *hso_dev = NULL;
2881 struct hso_shared_int *shared_int;
2882 struct hso_device *tmp_dev = NULL;
2883
2884 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2885 dev_err(&interface->dev, "Not our interface\n");
2886 return -ENODEV;
2887 }
2888
2889 if_num = interface->altsetting->desc.bInterfaceNumber;
2890
2891 /* Get the interface/port specification from either driver_info or from
2892 * the device itself */
2893 if (id->driver_info)
2894 port_spec = ((u32 *)(id->driver_info))[if_num];
2895 else
2896 port_spec = hso_get_config_data(interface);
2897
2898 /* Check if we need to switch to alt interfaces prior to port
2899 * configuration */
2900 if (interface->num_altsetting > 1)
2901 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2902 interface->needs_remote_wakeup = 1;
2903
2904 /* Allocate new hso device(s) */
2905 switch (port_spec & HSO_INTF_MASK) {
2906 case HSO_INTF_MUX:
2907 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2908 /* Create the network device */
2909 if (!disable_net) {
2910 hso_dev = hso_create_net_device(interface,
2911 port_spec);
2912 if (!hso_dev)
2913 goto exit;
2914 tmp_dev = hso_dev;
2915 }
2916 }
2917
2918 if (hso_get_mux_ports(interface, &port_mask))
2919 /* TODO: de-allocate everything */
2920 goto exit;
2921
2922 shared_int = hso_create_shared_int(interface);
2923 if (!shared_int)
2924 goto exit;
2925
2926 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2927 if (port_mask & i) {
2928 hso_dev = hso_create_mux_serial_device(
2929 interface, i, shared_int);
2930 if (!hso_dev)
2931 goto exit;
2932 }
2933 }
2934
2935 if (tmp_dev)
2936 hso_dev = tmp_dev;
2937 break;
2938
2939 case HSO_INTF_BULK:
2940 /* It's a regular bulk interface */
2941 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2942 if (!disable_net)
2943 hso_dev =
2944 hso_create_net_device(interface, port_spec);
2945 } else {
2946 hso_dev =
2947 hso_create_bulk_serial_device(interface, port_spec);
2948 }
2949 if (!hso_dev)
2950 goto exit;
2951 break;
2952 default:
2953 goto exit;
2954 }
2955
2956 /* save our data pointer in this device */
2957 usb_set_intfdata(interface, hso_dev);
2958
2959 /* done */
2960 return 0;
2961 exit:
2962 hso_free_interface(interface);
2963 return -ENODEV;
2964 }
2965
2966 /* device removed, cleaning up */
2967 static void hso_disconnect(struct usb_interface *interface)
2968 {
2969 hso_free_interface(interface);
2970
2971 /* remove reference of our private data */
2972 usb_set_intfdata(interface, NULL);
2973 }
2974
2975 static void async_get_intf(struct work_struct *data)
2976 {
2977 struct hso_device *hso_dev =
2978 container_of(data, struct hso_device, async_get_intf);
2979 usb_autopm_get_interface(hso_dev->interface);
2980 }
2981
2982 static void async_put_intf(struct work_struct *data)
2983 {
2984 struct hso_device *hso_dev =
2985 container_of(data, struct hso_device, async_put_intf);
2986 usb_autopm_put_interface(hso_dev->interface);
2987 }
2988
2989 static int hso_get_activity(struct hso_device *hso_dev)
2990 {
2991 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2992 if (!hso_dev->is_active) {
2993 hso_dev->is_active = 1;
2994 schedule_work(&hso_dev->async_get_intf);
2995 }
2996 }
2997
2998 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
2999 return -EAGAIN;
3000
3001 usb_mark_last_busy(hso_dev->usb);
3002
3003 return 0;
3004 }
3005
3006 static int hso_put_activity(struct hso_device *hso_dev)
3007 {
3008 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3009 if (hso_dev->is_active) {
3010 hso_dev->is_active = 0;
3011 schedule_work(&hso_dev->async_put_intf);
3012 return -EAGAIN;
3013 }
3014 }
3015 hso_dev->is_active = 0;
3016 return 0;
3017 }
3018
3019 /* called by kernel when we need to suspend device */
3020 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3021 {
3022 int i, result;
3023
3024 /* Stop all serial ports */
3025 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3026 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3027 result = hso_stop_serial_device(serial_table[i]);
3028 if (result)
3029 goto out;
3030 }
3031 }
3032
3033 /* Stop all network ports */
3034 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3035 if (network_table[i] &&
3036 (network_table[i]->interface == iface)) {
3037 result = hso_stop_net_device(network_table[i]);
3038 if (result)
3039 goto out;
3040 }
3041 }
3042
3043 out:
3044 return 0;
3045 }
3046
3047 /* called by kernel when we need to resume device */
3048 static int hso_resume(struct usb_interface *iface)
3049 {
3050 int i, result = 0;
3051 struct hso_net *hso_net;
3052
3053 /* Start all serial ports */
3054 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3055 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3056 if (dev2ser(serial_table[i])->port.count) {
3057 result =
3058 hso_start_serial_device(serial_table[i], GFP_NOIO);
3059 hso_kick_transmit(dev2ser(serial_table[i]));
3060 if (result)
3061 goto out;
3062 }
3063 }
3064 }
3065
3066 /* Start all network ports */
3067 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3068 if (network_table[i] &&
3069 (network_table[i]->interface == iface)) {
3070 hso_net = dev2net(network_table[i]);
3071 if (hso_net->flags & IFF_UP) {
3072 /* First transmit any lingering data,
3073 then restart the device. */
3074 if (hso_net->skb_tx_buf) {
3075 dev_dbg(&iface->dev,
3076 "Transmitting"
3077 " lingering data\n");
3078 hso_net_start_xmit(hso_net->skb_tx_buf,
3079 hso_net->net);
3080 hso_net->skb_tx_buf = NULL;
3081 }
3082 result = hso_start_net_device(network_table[i]);
3083 if (result)
3084 goto out;
3085 }
3086 }
3087 }
3088
3089 out:
3090 return result;
3091 }
3092
3093 static void reset_device(struct work_struct *data)
3094 {
3095 struct hso_device *hso_dev =
3096 container_of(data, struct hso_device, reset_device);
3097 struct usb_device *usb = hso_dev->usb;
3098 int result;
3099
3100 if (hso_dev->usb_gone) {
3101 D1("No reset during disconnect\n");
3102 } else {
3103 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3104 if (result < 0)
3105 D1("unable to lock device for reset: %d\n", result);
3106 else {
3107 usb_reset_device(usb);
3108 usb_unlock_device(usb);
3109 }
3110 }
3111 }
3112
3113 static void hso_serial_ref_free(struct kref *ref)
3114 {
3115 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3116
3117 hso_free_serial_device(hso_dev);
3118 }
3119
3120 static void hso_free_interface(struct usb_interface *interface)
3121 {
3122 struct hso_serial *hso_dev;
3123 int i;
3124
3125 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3126 if (serial_table[i] &&
3127 (serial_table[i]->interface == interface)) {
3128 hso_dev = dev2ser(serial_table[i]);
3129 tty_port_tty_hangup(&hso_dev->port, false);
3130 mutex_lock(&hso_dev->parent->mutex);
3131 hso_dev->parent->usb_gone = 1;
3132 mutex_unlock(&hso_dev->parent->mutex);
3133 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3134 }
3135 }
3136
3137 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3138 if (network_table[i] &&
3139 (network_table[i]->interface == interface)) {
3140 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3141 /* hso_stop_net_device doesn't stop the net queue since
3142 * traffic needs to start it again when suspended */
3143 netif_stop_queue(dev2net(network_table[i])->net);
3144 hso_stop_net_device(network_table[i]);
3145 cancel_work_sync(&network_table[i]->async_put_intf);
3146 cancel_work_sync(&network_table[i]->async_get_intf);
3147 if (rfk) {
3148 rfkill_unregister(rfk);
3149 rfkill_destroy(rfk);
3150 }
3151 hso_free_net_device(network_table[i]);
3152 }
3153 }
3154 }
3155
3156 /* Helper functions */
3157
3158 /* Get the endpoint ! */
3159 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3160 int type, int dir)
3161 {
3162 int i;
3163 struct usb_host_interface *iface = intf->cur_altsetting;
3164 struct usb_endpoint_descriptor *endp;
3165
3166 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3167 endp = &iface->endpoint[i].desc;
3168 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3169 (usb_endpoint_type(endp) == type))
3170 return endp;
3171 }
3172
3173 return NULL;
3174 }
3175
3176 /* Get the byte that describes which ports are enabled */
3177 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3178 {
3179 int i;
3180 struct usb_host_interface *iface = intf->cur_altsetting;
3181
3182 if (iface->extralen == 3) {
3183 *ports = iface->extra[2];
3184 return 0;
3185 }
3186
3187 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3188 if (iface->endpoint[i].extralen == 3) {
3189 *ports = iface->endpoint[i].extra[2];
3190 return 0;
3191 }
3192 }
3193
3194 return -1;
3195 }
3196
3197 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3198 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3199 struct usb_device *usb, gfp_t gfp)
3200 {
3201 int result;
3202
3203 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3204 usb_rcvintpipe(usb,
3205 shared_int->intr_endp->bEndpointAddress & 0x7F),
3206 shared_int->shared_intr_buf,
3207 1,
3208 intr_callback, shared_int,
3209 shared_int->intr_endp->bInterval);
3210
3211 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3212 if (result)
3213 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3214 result);
3215
3216 return result;
3217 }
3218
3219 /* operations setup of the serial interface */
3220 static const struct tty_operations hso_serial_ops = {
3221 .open = hso_serial_open,
3222 .close = hso_serial_close,
3223 .write = hso_serial_write,
3224 .write_room = hso_serial_write_room,
3225 .cleanup = hso_serial_cleanup,
3226 .ioctl = hso_serial_ioctl,
3227 .set_termios = hso_serial_set_termios,
3228 .chars_in_buffer = hso_serial_chars_in_buffer,
3229 .tiocmget = hso_serial_tiocmget,
3230 .tiocmset = hso_serial_tiocmset,
3231 .get_icount = hso_get_count,
3232 .unthrottle = hso_unthrottle
3233 };
3234
3235 static struct usb_driver hso_driver = {
3236 .name = driver_name,
3237 .probe = hso_probe,
3238 .disconnect = hso_disconnect,
3239 .id_table = hso_ids,
3240 .suspend = hso_suspend,
3241 .resume = hso_resume,
3242 .reset_resume = hso_resume,
3243 .supports_autosuspend = 1,
3244 .disable_hub_initiated_lpm = 1,
3245 };
3246
3247 static int __init hso_init(void)
3248 {
3249 int i;
3250 int result;
3251
3252 /* put it in the log */
3253 printk(KERN_INFO "hso: %s\n", version);
3254
3255 /* Initialise the serial table semaphore and table */
3256 spin_lock_init(&serial_table_lock);
3257 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3258 serial_table[i] = NULL;
3259
3260 /* allocate our driver using the proper amount of supported minors */
3261 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3262 if (!tty_drv)
3263 return -ENOMEM;
3264
3265 /* fill in all needed values */
3266 tty_drv->driver_name = driver_name;
3267 tty_drv->name = tty_filename;
3268
3269 /* if major number is provided as parameter, use that one */
3270 if (tty_major)
3271 tty_drv->major = tty_major;
3272
3273 tty_drv->minor_start = 0;
3274 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3275 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3276 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3277 tty_drv->init_termios = tty_std_termios;
3278 hso_init_termios(&tty_drv->init_termios);
3279 tty_set_operations(tty_drv, &hso_serial_ops);
3280
3281 /* register the tty driver */
3282 result = tty_register_driver(tty_drv);
3283 if (result) {
3284 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3285 __func__, result);
3286 goto err_free_tty;
3287 }
3288
3289 /* register this module as an usb driver */
3290 result = usb_register(&hso_driver);
3291 if (result) {
3292 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3293 result);
3294 goto err_unreg_tty;
3295 }
3296
3297 /* done */
3298 return 0;
3299 err_unreg_tty:
3300 tty_unregister_driver(tty_drv);
3301 err_free_tty:
3302 put_tty_driver(tty_drv);
3303 return result;
3304 }
3305
3306 static void __exit hso_exit(void)
3307 {
3308 printk(KERN_INFO "hso: unloaded\n");
3309
3310 tty_unregister_driver(tty_drv);
3311 put_tty_driver(tty_drv);
3312 /* deregister the usb driver */
3313 usb_deregister(&hso_driver);
3314 }
3315
3316 /* Module definitions */
3317 module_init(hso_init);
3318 module_exit(hso_exit);
3319
3320 MODULE_AUTHOR(MOD_AUTHOR);
3321 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3322 MODULE_LICENSE(MOD_LICENSE);
3323
3324 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3325 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3326 module_param(debug, int, S_IRUGO | S_IWUSR);
3327
3328 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3329 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3330 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3331
3332 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3333 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3334 module_param(disable_net, int, S_IRUGO | S_IWUSR);
Linux kernel - Deliverables
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