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sfc: Don't use enums as a bitmask.
[zen-stable.git] / drivers / net / usb / hso.c
blob387ca43f26f4c3942e098702b55d39dbca325a90
1 /******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
6 * Filip Aben <f.aben@option.com>
7 * Denis Joseph Barrow <d.barow@option.com>
8 * Jan Dumon <j.dumon@option.com>
9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
10 * <ajb@spheresystems.co.uk>
11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
12 * Copyright (C) 2008 Novell, Inc.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
26 * USA
27 *
28 *
29 *****************************************************************************/
30
31 /******************************************************************************
32 *
33 * Description of the device:
34 *
35 * Interface 0: Contains the IP network interface on the bulk end points.
36 * The multiplexed serial ports are using the interrupt and
37 * control endpoints.
38 * Interrupt contains a bitmap telling which multiplexed
39 * serialport needs servicing.
40 *
41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
42 * port is opened, as this have a huge impact on the network port
43 * throughput.
44 *
45 * Interface 2: Standard modem interface - circuit switched interface, this
46 * can be used to make a standard ppp connection however it
47 * should not be used in conjunction with the IP network interface
48 * enabled for USB performance reasons i.e. if using this set
49 * ideally disable_net=1.
50 *
51 *****************************************************************************/
52
53 #include <linux/sched.h>
54 #include <linux/slab.h>
55 #include <linux/init.h>
56 #include <linux/delay.h>
57 #include <linux/netdevice.h>
58 #include <linux/module.h>
59 #include <linux/ethtool.h>
60 #include <linux/usb.h>
61 #include <linux/timer.h>
62 #include <linux/tty.h>
63 #include <linux/tty_driver.h>
64 #include <linux/tty_flip.h>
65 #include <linux/kmod.h>
66 #include <linux/rfkill.h>
67 #include <linux/ip.h>
68 #include <linux/uaccess.h>
69 #include <linux/usb/cdc.h>
70 #include <net/arp.h>
71 #include <asm/byteorder.h>
72 #include <linux/serial_core.h>
73 #include <linux/serial.h>
74
75
76 #define MOD_AUTHOR "Option Wireless"
77 #define MOD_DESCRIPTION "USB High Speed Option driver"
78 #define MOD_LICENSE "GPL"
79
80 #define HSO_MAX_NET_DEVICES 10
81 #define HSO__MAX_MTU 2048
82 #define DEFAULT_MTU 1500
83 #define DEFAULT_MRU 1500
84
85 #define CTRL_URB_RX_SIZE 1024
86 #define CTRL_URB_TX_SIZE 64
87
88 #define BULK_URB_RX_SIZE 4096
89 #define BULK_URB_TX_SIZE 8192
90
91 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
92 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
93 #define MUX_BULK_RX_BUF_COUNT 4
94 #define USB_TYPE_OPTION_VENDOR 0x20
95
96 /* These definitions are used with the struct hso_net flags element */
97 /* - use *_bit operations on it. (bit indices not values.) */
98 #define HSO_NET_RUNNING 0
99
100 #define HSO_NET_TX_TIMEOUT (HZ*10)
101
102 #define HSO_SERIAL_MAGIC 0x48534f31
103
104 /* Number of ttys to handle */
105 #define HSO_SERIAL_TTY_MINORS 256
106
107 #define MAX_RX_URBS 2
108
109 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
110 {
111 if (tty)
112 return tty->driver_data;
113 return NULL;
114 }
115
116 /*****************************************************************************/
117 /* Debugging functions */
118 /*****************************************************************************/
119 #define D__(lvl_, fmt, arg...) \
120 do { \
121 printk(lvl_ "[%d:%s]: " fmt "\n", \
122 __LINE__, __func__, ## arg); \
123 } while (0)
124
125 #define D_(lvl, args...) \
126 do { \
127 if (lvl & debug) \
128 D__(KERN_INFO, args); \
129 } while (0)
130
131 #define D1(args...) D_(0x01, ##args)
132 #define D2(args...) D_(0x02, ##args)
133 #define D3(args...) D_(0x04, ##args)
134 #define D4(args...) D_(0x08, ##args)
135 #define D5(args...) D_(0x10, ##args)
136
137 /*****************************************************************************/
138 /* Enumerators */
139 /*****************************************************************************/
140 enum pkt_parse_state {
141 WAIT_IP,
142 WAIT_DATA,
143 WAIT_SYNC
144 };
145
146 /*****************************************************************************/
147 /* Structs */
148 /*****************************************************************************/
149
150 struct hso_shared_int {
151 struct usb_endpoint_descriptor *intr_endp;
152 void *shared_intr_buf;
153 struct urb *shared_intr_urb;
154 struct usb_device *usb;
155 int use_count;
156 int ref_count;
157 struct mutex shared_int_lock;
158 };
159
160 struct hso_net {
161 struct hso_device *parent;
162 struct net_device *net;
163 struct rfkill *rfkill;
164
165 struct usb_endpoint_descriptor *in_endp;
166 struct usb_endpoint_descriptor *out_endp;
167
168 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
169 struct urb *mux_bulk_tx_urb;
170 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
171 void *mux_bulk_tx_buf;
172
173 struct sk_buff *skb_rx_buf;
174 struct sk_buff *skb_tx_buf;
175
176 enum pkt_parse_state rx_parse_state;
177 spinlock_t net_lock;
178
179 unsigned short rx_buf_size;
180 unsigned short rx_buf_missing;
181 struct iphdr rx_ip_hdr;
182
183 unsigned long flags;
184 };
185
186 enum rx_ctrl_state{
187 RX_IDLE,
188 RX_SENT,
189 RX_PENDING
190 };
191
192 #define BM_REQUEST_TYPE (0xa1)
193 #define B_NOTIFICATION (0x20)
194 #define W_VALUE (0x0)
195 #define W_INDEX (0x2)
196 #define W_LENGTH (0x2)
197
198 #define B_OVERRUN (0x1<<6)
199 #define B_PARITY (0x1<<5)
200 #define B_FRAMING (0x1<<4)
201 #define B_RING_SIGNAL (0x1<<3)
202 #define B_BREAK (0x1<<2)
203 #define B_TX_CARRIER (0x1<<1)
204 #define B_RX_CARRIER (0x1<<0)
205
206 struct hso_serial_state_notification {
207 u8 bmRequestType;
208 u8 bNotification;
209 u16 wValue;
210 u16 wIndex;
211 u16 wLength;
212 u16 UART_state_bitmap;
213 } __packed;
214
215 struct hso_tiocmget {
216 struct mutex mutex;
217 wait_queue_head_t waitq;
218 int intr_completed;
219 struct usb_endpoint_descriptor *endp;
220 struct urb *urb;
221 struct hso_serial_state_notification serial_state_notification;
222 u16 prev_UART_state_bitmap;
223 struct uart_icount icount;
224 };
225
226
227 struct hso_serial {
228 struct hso_device *parent;
229 int magic;
230 u8 minor;
231
232 struct hso_shared_int *shared_int;
233
234 /* rx/tx urb could be either a bulk urb or a control urb depending
235 on which serial port it is used on. */
236 struct urb *rx_urb[MAX_RX_URBS];
237 u8 num_rx_urbs;
238 u8 *rx_data[MAX_RX_URBS];
239 u16 rx_data_length; /* should contain allocated length */
240
241 struct urb *tx_urb;
242 u8 *tx_data;
243 u8 *tx_buffer;
244 u16 tx_data_length; /* should contain allocated length */
245 u16 tx_data_count;
246 u16 tx_buffer_count;
247 struct usb_ctrlrequest ctrl_req_tx;
248 struct usb_ctrlrequest ctrl_req_rx;
249
250 struct usb_endpoint_descriptor *in_endp;
251 struct usb_endpoint_descriptor *out_endp;
252
253 enum rx_ctrl_state rx_state;
254 u8 rts_state;
255 u8 dtr_state;
256 unsigned tx_urb_used:1;
257
258 /* from usb_serial_port */
259 struct tty_struct *tty;
260 int open_count;
261 spinlock_t serial_lock;
262
263 int (*write_data) (struct hso_serial *serial);
264 struct hso_tiocmget *tiocmget;
265 /* Hacks required to get flow control
266 * working on the serial receive buffers
267 * so as not to drop characters on the floor.
268 */
269 int curr_rx_urb_idx;
270 u16 curr_rx_urb_offset;
271 u8 rx_urb_filled[MAX_RX_URBS];
272 struct tasklet_struct unthrottle_tasklet;
273 struct work_struct retry_unthrottle_workqueue;
274 };
275
276 struct hso_device {
277 union {
278 struct hso_serial *dev_serial;
279 struct hso_net *dev_net;
280 } port_data;
281
282 u32 port_spec;
283
284 u8 is_active;
285 u8 usb_gone;
286 struct work_struct async_get_intf;
287 struct work_struct async_put_intf;
288 struct work_struct reset_device;
289
290 struct usb_device *usb;
291 struct usb_interface *interface;
292
293 struct device *dev;
294 struct kref ref;
295 struct mutex mutex;
296 };
297
298 /* Type of interface */
299 #define HSO_INTF_MASK 0xFF00
300 #define HSO_INTF_MUX 0x0100
301 #define HSO_INTF_BULK 0x0200
302
303 /* Type of port */
304 #define HSO_PORT_MASK 0xFF
305 #define HSO_PORT_NO_PORT 0x0
306 #define HSO_PORT_CONTROL 0x1
307 #define HSO_PORT_APP 0x2
308 #define HSO_PORT_GPS 0x3
309 #define HSO_PORT_PCSC 0x4
310 #define HSO_PORT_APP2 0x5
311 #define HSO_PORT_GPS_CONTROL 0x6
312 #define HSO_PORT_MSD 0x7
313 #define HSO_PORT_VOICE 0x8
314 #define HSO_PORT_DIAG2 0x9
315 #define HSO_PORT_DIAG 0x10
316 #define HSO_PORT_MODEM 0x11
317 #define HSO_PORT_NETWORK 0x12
318
319 /* Additional device info */
320 #define HSO_INFO_MASK 0xFF000000
321 #define HSO_INFO_CRC_BUG 0x01000000
322
323 /*****************************************************************************/
324 /* Prototypes */
325 /*****************************************************************************/
326 /* Serial driver functions */
327 static int hso_serial_tiocmset(struct tty_struct *tty,
328 unsigned int set, unsigned int clear);
329 static void ctrl_callback(struct urb *urb);
330 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
331 static void hso_kick_transmit(struct hso_serial *serial);
332 /* Helper functions */
333 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
334 struct usb_device *usb, gfp_t gfp);
335 static void handle_usb_error(int status, const char *function,
336 struct hso_device *hso_dev);
337 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
338 int type, int dir);
339 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
340 static void hso_free_interface(struct usb_interface *intf);
341 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
342 static int hso_stop_serial_device(struct hso_device *hso_dev);
343 static int hso_start_net_device(struct hso_device *hso_dev);
344 static void hso_free_shared_int(struct hso_shared_int *shared_int);
345 static int hso_stop_net_device(struct hso_device *hso_dev);
346 static void hso_serial_ref_free(struct kref *ref);
347 static void hso_std_serial_read_bulk_callback(struct urb *urb);
348 static int hso_mux_serial_read(struct hso_serial *serial);
349 static void async_get_intf(struct work_struct *data);
350 static void async_put_intf(struct work_struct *data);
351 static int hso_put_activity(struct hso_device *hso_dev);
352 static int hso_get_activity(struct hso_device *hso_dev);
353 static void tiocmget_intr_callback(struct urb *urb);
354 static void reset_device(struct work_struct *data);
355 /*****************************************************************************/
356 /* Helping functions */
357 /*****************************************************************************/
358
359 /* #define DEBUG */
360
361 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
362 {
363 return hso_dev->port_data.dev_net;
364 }
365
366 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
367 {
368 return hso_dev->port_data.dev_serial;
369 }
370
371 /* Debugging functions */
372 #ifdef DEBUG
373 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
374 unsigned int len)
375 {
376 static char name[255];
377
378 sprintf(name, "hso[%d:%s]", line_count, func_name);
379 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
380 }
381
382 #define DUMP(buf_, len_) \
383 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
384
385 #define DUMP1(buf_, len_) \
386 do { \
387 if (0x01 & debug) \
388 DUMP(buf_, len_); \
389 } while (0)
390 #else
391 #define DUMP(buf_, len_)
392 #define DUMP1(buf_, len_)
393 #endif
394
395 /* module parameters */
396 static int debug;
397 static int tty_major;
398 static int disable_net;
399
400 /* driver info */
401 static const char driver_name[] = "hso";
402 static const char tty_filename[] = "ttyHS";
403 static const char *version = __FILE__ ": " MOD_AUTHOR;
404 /* the usb driver itself (registered in hso_init) */
405 static struct usb_driver hso_driver;
406 /* serial structures */
407 static struct tty_driver *tty_drv;
408 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
409 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
410 static spinlock_t serial_table_lock;
411
412 static const s32 default_port_spec[] = {
413 HSO_INTF_MUX | HSO_PORT_NETWORK,
414 HSO_INTF_BULK | HSO_PORT_DIAG,
415 HSO_INTF_BULK | HSO_PORT_MODEM,
416 0
417 };
418
419 static const s32 icon321_port_spec[] = {
420 HSO_INTF_MUX | HSO_PORT_NETWORK,
421 HSO_INTF_BULK | HSO_PORT_DIAG2,
422 HSO_INTF_BULK | HSO_PORT_MODEM,
423 HSO_INTF_BULK | HSO_PORT_DIAG,
424 0
425 };
426
427 #define default_port_device(vendor, product) \
428 USB_DEVICE(vendor, product), \
429 .driver_info = (kernel_ulong_t)default_port_spec
430
431 #define icon321_port_device(vendor, product) \
432 USB_DEVICE(vendor, product), \
433 .driver_info = (kernel_ulong_t)icon321_port_spec
434
435 /* list of devices we support */
436 static const struct usb_device_id hso_ids[] = {
437 {default_port_device(0x0af0, 0x6711)},
438 {default_port_device(0x0af0, 0x6731)},
439 {default_port_device(0x0af0, 0x6751)},
440 {default_port_device(0x0af0, 0x6771)},
441 {default_port_device(0x0af0, 0x6791)},
442 {default_port_device(0x0af0, 0x6811)},
443 {default_port_device(0x0af0, 0x6911)},
444 {default_port_device(0x0af0, 0x6951)},
445 {default_port_device(0x0af0, 0x6971)},
446 {default_port_device(0x0af0, 0x7011)},
447 {default_port_device(0x0af0, 0x7031)},
448 {default_port_device(0x0af0, 0x7051)},
449 {default_port_device(0x0af0, 0x7071)},
450 {default_port_device(0x0af0, 0x7111)},
451 {default_port_device(0x0af0, 0x7211)},
452 {default_port_device(0x0af0, 0x7251)},
453 {default_port_device(0x0af0, 0x7271)},
454 {default_port_device(0x0af0, 0x7311)},
455 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
456 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
457 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
458 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
459 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
460 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
461 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
462 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
463 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
464 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
465 {USB_DEVICE(0x0af0, 0x7701)},
466 {USB_DEVICE(0x0af0, 0x7706)},
467 {USB_DEVICE(0x0af0, 0x7801)},
468 {USB_DEVICE(0x0af0, 0x7901)},
469 {USB_DEVICE(0x0af0, 0x7A01)},
470 {USB_DEVICE(0x0af0, 0x7A05)},
471 {USB_DEVICE(0x0af0, 0x8200)},
472 {USB_DEVICE(0x0af0, 0x8201)},
473 {USB_DEVICE(0x0af0, 0x8300)},
474 {USB_DEVICE(0x0af0, 0x8302)},
475 {USB_DEVICE(0x0af0, 0x8304)},
476 {USB_DEVICE(0x0af0, 0x8400)},
477 {USB_DEVICE(0x0af0, 0x8600)},
478 {USB_DEVICE(0x0af0, 0x8800)},
479 {USB_DEVICE(0x0af0, 0x8900)},
480 {USB_DEVICE(0x0af0, 0x9000)},
481 {USB_DEVICE(0x0af0, 0xd035)},
482 {USB_DEVICE(0x0af0, 0xd055)},
483 {USB_DEVICE(0x0af0, 0xd155)},
484 {USB_DEVICE(0x0af0, 0xd255)},
485 {USB_DEVICE(0x0af0, 0xd057)},
486 {USB_DEVICE(0x0af0, 0xd157)},
487 {USB_DEVICE(0x0af0, 0xd257)},
488 {USB_DEVICE(0x0af0, 0xd357)},
489 {USB_DEVICE(0x0af0, 0xd058)},
490 {USB_DEVICE(0x0af0, 0xc100)},
491 {}
492 };
493 MODULE_DEVICE_TABLE(usb, hso_ids);
494
495 /* Sysfs attribute */
496 static ssize_t hso_sysfs_show_porttype(struct device *dev,
497 struct device_attribute *attr,
498 char *buf)
499 {
500 struct hso_device *hso_dev = dev_get_drvdata(dev);
501 char *port_name;
502
503 if (!hso_dev)
504 return 0;
505
506 switch (hso_dev->port_spec & HSO_PORT_MASK) {
507 case HSO_PORT_CONTROL:
508 port_name = "Control";
509 break;
510 case HSO_PORT_APP:
511 port_name = "Application";
512 break;
513 case HSO_PORT_APP2:
514 port_name = "Application2";
515 break;
516 case HSO_PORT_GPS:
517 port_name = "GPS";
518 break;
519 case HSO_PORT_GPS_CONTROL:
520 port_name = "GPS Control";
521 break;
522 case HSO_PORT_PCSC:
523 port_name = "PCSC";
524 break;
525 case HSO_PORT_DIAG:
526 port_name = "Diagnostic";
527 break;
528 case HSO_PORT_DIAG2:
529 port_name = "Diagnostic2";
530 break;
531 case HSO_PORT_MODEM:
532 port_name = "Modem";
533 break;
534 case HSO_PORT_NETWORK:
535 port_name = "Network";
536 break;
537 default:
538 port_name = "Unknown";
539 break;
540 }
541
542 return sprintf(buf, "%s\n", port_name);
543 }
544 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
545
546 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
547 {
548 int idx;
549
550 for (idx = 0; idx < serial->num_rx_urbs; idx++)
551 if (serial->rx_urb[idx] == urb)
552 return idx;
553 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
554 return -1;
555 }
556
557 /* converts mux value to a port spec value */
558 static u32 hso_mux_to_port(int mux)
559 {
560 u32 result;
561
562 switch (mux) {
563 case 0x1:
564 result = HSO_PORT_CONTROL;
565 break;
566 case 0x2:
567 result = HSO_PORT_APP;
568 break;
569 case 0x4:
570 result = HSO_PORT_PCSC;
571 break;
572 case 0x8:
573 result = HSO_PORT_GPS;
574 break;
575 case 0x10:
576 result = HSO_PORT_APP2;
577 break;
578 default:
579 result = HSO_PORT_NO_PORT;
580 }
581 return result;
582 }
583
584 /* converts port spec value to a mux value */
585 static u32 hso_port_to_mux(int port)
586 {
587 u32 result;
588
589 switch (port & HSO_PORT_MASK) {
590 case HSO_PORT_CONTROL:
591 result = 0x0;
592 break;
593 case HSO_PORT_APP:
594 result = 0x1;
595 break;
596 case HSO_PORT_PCSC:
597 result = 0x2;
598 break;
599 case HSO_PORT_GPS:
600 result = 0x3;
601 break;
602 case HSO_PORT_APP2:
603 result = 0x4;
604 break;
605 default:
606 result = 0x0;
607 }
608 return result;
609 }
610
611 static struct hso_serial *get_serial_by_shared_int_and_type(
612 struct hso_shared_int *shared_int,
613 int mux)
614 {
615 int i, port;
616
617 port = hso_mux_to_port(mux);
618
619 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
620 if (serial_table[i] &&
621 (dev2ser(serial_table[i])->shared_int == shared_int) &&
622 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
623 return dev2ser(serial_table[i]);
624 }
625 }
626
627 return NULL;
628 }
629
630 static struct hso_serial *get_serial_by_index(unsigned index)
631 {
632 struct hso_serial *serial = NULL;
633 unsigned long flags;
634
635 spin_lock_irqsave(&serial_table_lock, flags);
636 if (serial_table[index])
637 serial = dev2ser(serial_table[index]);
638 spin_unlock_irqrestore(&serial_table_lock, flags);
639
640 return serial;
641 }
642
643 static int get_free_serial_index(void)
644 {
645 int index;
646 unsigned long flags;
647
648 spin_lock_irqsave(&serial_table_lock, flags);
649 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
650 if (serial_table[index] == NULL) {
651 spin_unlock_irqrestore(&serial_table_lock, flags);
652 return index;
653 }
654 }
655 spin_unlock_irqrestore(&serial_table_lock, flags);
656
657 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
658 return -1;
659 }
660
661 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
662 {
663 unsigned long flags;
664
665 spin_lock_irqsave(&serial_table_lock, flags);
666 if (serial)
667 serial_table[index] = serial->parent;
668 else
669 serial_table[index] = NULL;
670 spin_unlock_irqrestore(&serial_table_lock, flags);
671 }
672
673 static void handle_usb_error(int status, const char *function,
674 struct hso_device *hso_dev)
675 {
676 char *explanation;
677
678 switch (status) {
679 case -ENODEV:
680 explanation = "no device";
681 break;
682 case -ENOENT:
683 explanation = "endpoint not enabled";
684 break;
685 case -EPIPE:
686 explanation = "endpoint stalled";
687 break;
688 case -ENOSPC:
689 explanation = "not enough bandwidth";
690 break;
691 case -ESHUTDOWN:
692 explanation = "device disabled";
693 break;
694 case -EHOSTUNREACH:
695 explanation = "device suspended";
696 break;
697 case -EINVAL:
698 case -EAGAIN:
699 case -EFBIG:
700 case -EMSGSIZE:
701 explanation = "internal error";
702 break;
703 case -EILSEQ:
704 case -EPROTO:
705 case -ETIME:
706 case -ETIMEDOUT:
707 explanation = "protocol error";
708 if (hso_dev)
709 schedule_work(&hso_dev->reset_device);
710 break;
711 default:
712 explanation = "unknown status";
713 break;
714 }
715
716 /* log a meaningful explanation of an USB status */
717 D1("%s: received USB status - %s (%d)", function, explanation, status);
718 }
719
720 /* Network interface functions */
721
722 /* called when net interface is brought up by ifconfig */
723 static int hso_net_open(struct net_device *net)
724 {
725 struct hso_net *odev = netdev_priv(net);
726 unsigned long flags = 0;
727
728 if (!odev) {
729 dev_err(&net->dev, "No net device !\n");
730 return -ENODEV;
731 }
732
733 odev->skb_tx_buf = NULL;
734
735 /* setup environment */
736 spin_lock_irqsave(&odev->net_lock, flags);
737 odev->rx_parse_state = WAIT_IP;
738 odev->rx_buf_size = 0;
739 odev->rx_buf_missing = sizeof(struct iphdr);
740 spin_unlock_irqrestore(&odev->net_lock, flags);
741
742 /* We are up and running. */
743 set_bit(HSO_NET_RUNNING, &odev->flags);
744 hso_start_net_device(odev->parent);
745
746 /* Tell the kernel we are ready to start receiving from it */
747 netif_start_queue(net);
748
749 return 0;
750 }
751
752 /* called when interface is brought down by ifconfig */
753 static int hso_net_close(struct net_device *net)
754 {
755 struct hso_net *odev = netdev_priv(net);
756
757 /* we don't need the queue anymore */
758 netif_stop_queue(net);
759 /* no longer running */
760 clear_bit(HSO_NET_RUNNING, &odev->flags);
761
762 hso_stop_net_device(odev->parent);
763
764 /* done */
765 return 0;
766 }
767
768 /* USB tells is xmit done, we should start the netqueue again */
769 static void write_bulk_callback(struct urb *urb)
770 {
771 struct hso_net *odev = urb->context;
772 int status = urb->status;
773
774 /* Sanity check */
775 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
776 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
777 return;
778 }
779
780 /* Do we still have a valid kernel network device? */
781 if (!netif_device_present(odev->net)) {
782 dev_err(&urb->dev->dev, "%s: net device not present\n",
783 __func__);
784 return;
785 }
786
787 /* log status, but don't act on it, we don't need to resubmit anything
788 * anyhow */
789 if (status)
790 handle_usb_error(status, __func__, odev->parent);
791
792 hso_put_activity(odev->parent);
793
794 /* Tell the network interface we are ready for another frame */
795 netif_wake_queue(odev->net);
796 }
797
798 /* called by kernel when we need to transmit a packet */
799 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
800 struct net_device *net)
801 {
802 struct hso_net *odev = netdev_priv(net);
803 int result;
804
805 /* Tell the kernel, "No more frames 'til we are done with this one." */
806 netif_stop_queue(net);
807 if (hso_get_activity(odev->parent) == -EAGAIN) {
808 odev->skb_tx_buf = skb;
809 return NETDEV_TX_OK;
810 }
811
812 /* log if asked */
813 DUMP1(skb->data, skb->len);
814 /* Copy it from kernel memory to OUR memory */
815 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
816 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
817
818 /* Fill in the URB for shipping it out. */
819 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
820 odev->parent->usb,
821 usb_sndbulkpipe(odev->parent->usb,
822 odev->out_endp->
823 bEndpointAddress & 0x7F),
824 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
825 odev);
826
827 /* Deal with the Zero Length packet problem, I hope */
828 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
829
830 /* Send the URB on its merry way. */
831 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
832 if (result) {
833 dev_warn(&odev->parent->interface->dev,
834 "failed mux_bulk_tx_urb %d\n", result);
835 net->stats.tx_errors++;
836 netif_start_queue(net);
837 } else {
838 net->stats.tx_packets++;
839 net->stats.tx_bytes += skb->len;
840 }
841 dev_kfree_skb(skb);
842 /* we're done */
843 return NETDEV_TX_OK;
844 }
845
846 static const struct ethtool_ops ops = {
847 .get_link = ethtool_op_get_link
848 };
849
850 /* called when a packet did not ack after watchdogtimeout */
851 static void hso_net_tx_timeout(struct net_device *net)
852 {
853 struct hso_net *odev = netdev_priv(net);
854
855 if (!odev)
856 return;
857
858 /* Tell syslog we are hosed. */
859 dev_warn(&net->dev, "Tx timed out.\n");
860
861 /* Tear the waiting frame off the list */
862 if (odev->mux_bulk_tx_urb &&
863 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
864 usb_unlink_urb(odev->mux_bulk_tx_urb);
865
866 /* Update statistics */
867 net->stats.tx_errors++;
868 }
869
870 /* make a real packet from the received USB buffer */
871 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
872 unsigned int count, unsigned char is_eop)
873 {
874 unsigned short temp_bytes;
875 unsigned short buffer_offset = 0;
876 unsigned short frame_len;
877 unsigned char *tmp_rx_buf;
878
879 /* log if needed */
880 D1("Rx %d bytes", count);
881 DUMP(ip_pkt, min(128, (int)count));
882
883 while (count) {
884 switch (odev->rx_parse_state) {
885 case WAIT_IP:
886 /* waiting for IP header. */
887 /* wanted bytes - size of ip header */
888 temp_bytes =
889 (count <
890 odev->rx_buf_missing) ? count : odev->
891 rx_buf_missing;
892
893 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
894 odev->rx_buf_size, ip_pkt + buffer_offset,
895 temp_bytes);
896
897 odev->rx_buf_size += temp_bytes;
898 buffer_offset += temp_bytes;
899 odev->rx_buf_missing -= temp_bytes;
900 count -= temp_bytes;
901
902 if (!odev->rx_buf_missing) {
903 /* header is complete allocate an sk_buffer and
904 * continue to WAIT_DATA */
905 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
906
907 if ((frame_len > DEFAULT_MRU) ||
908 (frame_len < sizeof(struct iphdr))) {
909 dev_err(&odev->net->dev,
910 "Invalid frame (%d) length\n",
911 frame_len);
912 odev->rx_parse_state = WAIT_SYNC;
913 continue;
914 }
915 /* Allocate an sk_buff */
916 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
917 frame_len);
918 if (!odev->skb_rx_buf) {
919 /* We got no receive buffer. */
920 D1("could not allocate memory");
921 odev->rx_parse_state = WAIT_SYNC;
922 return;
923 }
924
925 /* Copy what we got so far. make room for iphdr
926 * after tail. */
927 tmp_rx_buf =
928 skb_put(odev->skb_rx_buf,
929 sizeof(struct iphdr));
930 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
931 sizeof(struct iphdr));
932
933 /* ETH_HLEN */
934 odev->rx_buf_size = sizeof(struct iphdr);
935
936 /* Filip actually use .tot_len */
937 odev->rx_buf_missing =
938 frame_len - sizeof(struct iphdr);
939 odev->rx_parse_state = WAIT_DATA;
940 }
941 break;
942
943 case WAIT_DATA:
944 temp_bytes = (count < odev->rx_buf_missing)
945 ? count : odev->rx_buf_missing;
946
947 /* Copy the rest of the bytes that are left in the
948 * buffer into the waiting sk_buf. */
949 /* Make room for temp_bytes after tail. */
950 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
951 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
952
953 odev->rx_buf_missing -= temp_bytes;
954 count -= temp_bytes;
955 buffer_offset += temp_bytes;
956 odev->rx_buf_size += temp_bytes;
957 if (!odev->rx_buf_missing) {
958 /* Packet is complete. Inject into stack. */
959 /* We have IP packet here */
960 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
961 skb_reset_mac_header(odev->skb_rx_buf);
962
963 /* Ship it off to the kernel */
964 netif_rx(odev->skb_rx_buf);
965 /* No longer our buffer. */
966 odev->skb_rx_buf = NULL;
967
968 /* update out statistics */
969 odev->net->stats.rx_packets++;
970
971 odev->net->stats.rx_bytes += odev->rx_buf_size;
972
973 odev->rx_buf_size = 0;
974 odev->rx_buf_missing = sizeof(struct iphdr);
975 odev->rx_parse_state = WAIT_IP;
976 }
977 break;
978
979 case WAIT_SYNC:
980 D1(" W_S");
981 count = 0;
982 break;
983 default:
984 D1(" ");
985 count--;
986 break;
987 }
988 }
989
990 /* Recovery mechanism for WAIT_SYNC state. */
991 if (is_eop) {
992 if (odev->rx_parse_state == WAIT_SYNC) {
993 odev->rx_parse_state = WAIT_IP;
994 odev->rx_buf_size = 0;
995 odev->rx_buf_missing = sizeof(struct iphdr);
996 }
997 }
998 }
999
1000 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
1001 {
1002 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1003 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
1004
1005 if (((rest == 5) || (rest == 6)) &&
1006 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
1007 crc_check, 4)) {
1008 urb->actual_length -= 4;
1009 }
1010 }
1011
1012 /* Moving data from usb to kernel (in interrupt state) */
1013 static void read_bulk_callback(struct urb *urb)
1014 {
1015 struct hso_net *odev = urb->context;
1016 struct net_device *net;
1017 int result;
1018 int status = urb->status;
1019
1020 /* is al ok? (Filip: Who's Al ?) */
1021 if (status) {
1022 handle_usb_error(status, __func__, odev->parent);
1023 return;
1024 }
1025
1026 /* Sanity check */
1027 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1028 D1("BULK IN callback but driver is not active!");
1029 return;
1030 }
1031 usb_mark_last_busy(urb->dev);
1032
1033 net = odev->net;
1034
1035 if (!netif_device_present(net)) {
1036 /* Somebody killed our network interface... */
1037 return;
1038 }
1039
1040 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1041 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1042
1043 /* do we even have a packet? */
1044 if (urb->actual_length) {
1045 /* Handle the IP stream, add header and push it onto network
1046 * stack if the packet is complete. */
1047 spin_lock(&odev->net_lock);
1048 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1049 (urb->transfer_buffer_length >
1050 urb->actual_length) ? 1 : 0);
1051 spin_unlock(&odev->net_lock);
1052 }
1053
1054 /* We are done with this URB, resubmit it. Prep the USB to wait for
1055 * another frame. Reuse same as received. */
1056 usb_fill_bulk_urb(urb,
1057 odev->parent->usb,
1058 usb_rcvbulkpipe(odev->parent->usb,
1059 odev->in_endp->
1060 bEndpointAddress & 0x7F),
1061 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1062 read_bulk_callback, odev);
1063
1064 /* Give this to the USB subsystem so it can tell us when more data
1065 * arrives. */
1066 result = usb_submit_urb(urb, GFP_ATOMIC);
1067 if (result)
1068 dev_warn(&odev->parent->interface->dev,
1069 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1070 result);
1071 }
1072
1073 /* Serial driver functions */
1074
1075 static void hso_init_termios(struct ktermios *termios)
1076 {
1077 /*
1078 * The default requirements for this device are:
1079 */
1080 termios->c_iflag &=
1081 ~(IGNBRK /* disable ignore break */
1082 | BRKINT /* disable break causes interrupt */
1083 | PARMRK /* disable mark parity errors */
1084 | ISTRIP /* disable clear high bit of input characters */
1085 | INLCR /* disable translate NL to CR */
1086 | IGNCR /* disable ignore CR */
1087 | ICRNL /* disable translate CR to NL */
1088 | IXON); /* disable enable XON/XOFF flow control */
1089
1090 /* disable postprocess output characters */
1091 termios->c_oflag &= ~OPOST;
1092
1093 termios->c_lflag &=
1094 ~(ECHO /* disable echo input characters */
1095 | ECHONL /* disable echo new line */
1096 | ICANON /* disable erase, kill, werase, and rprnt
1097 special characters */
1098 | ISIG /* disable interrupt, quit, and suspend special
1099 characters */
1100 | IEXTEN); /* disable non-POSIX special characters */
1101
1102 termios->c_cflag &=
1103 ~(CSIZE /* no size */
1104 | PARENB /* disable parity bit */
1105 | CBAUD /* clear current baud rate */
1106 | CBAUDEX); /* clear current buad rate */
1107
1108 termios->c_cflag |= CS8; /* character size 8 bits */
1109
1110 /* baud rate 115200 */
1111 tty_termios_encode_baud_rate(termios, 115200, 115200);
1112 }
1113
1114 static void _hso_serial_set_termios(struct tty_struct *tty,
1115 struct ktermios *old)
1116 {
1117 struct hso_serial *serial = get_serial_by_tty(tty);
1118 struct ktermios *termios;
1119
1120 if (!serial) {
1121 printk(KERN_ERR "%s: no tty structures", __func__);
1122 return;
1123 }
1124
1125 D4("port %d", serial->minor);
1126
1127 /*
1128 * Fix up unsupported bits
1129 */
1130 termios = tty->termios;
1131 termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1132
1133 termios->c_cflag &=
1134 ~(CSIZE /* no size */
1135 | PARENB /* disable parity bit */
1136 | CBAUD /* clear current baud rate */
1137 | CBAUDEX); /* clear current buad rate */
1138
1139 termios->c_cflag |= CS8; /* character size 8 bits */
1140
1141 /* baud rate 115200 */
1142 tty_encode_baud_rate(tty, 115200, 115200);
1143 }
1144
1145 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1146 {
1147 int result;
1148 /* We are done with this URB, resubmit it. Prep the USB to wait for
1149 * another frame */
1150 usb_fill_bulk_urb(urb, serial->parent->usb,
1151 usb_rcvbulkpipe(serial->parent->usb,
1152 serial->in_endp->
1153 bEndpointAddress & 0x7F),
1154 urb->transfer_buffer, serial->rx_data_length,
1155 hso_std_serial_read_bulk_callback, serial);
1156 /* Give this to the USB subsystem so it can tell us when more data
1157 * arrives. */
1158 result = usb_submit_urb(urb, GFP_ATOMIC);
1159 if (result) {
1160 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1161 __func__, result);
1162 }
1163 }
1164
1165
1166
1167
1168 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1169 {
1170 int count;
1171 struct urb *curr_urb;
1172
1173 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1174 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1175 count = put_rxbuf_data(curr_urb, serial);
1176 if (count == -1)
1177 return;
1178 if (count == 0) {
1179 serial->curr_rx_urb_idx++;
1180 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1181 serial->curr_rx_urb_idx = 0;
1182 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1183 }
1184 }
1185 }
1186
1187 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1188 {
1189 int count = 0;
1190 struct urb *urb;
1191
1192 urb = serial->rx_urb[0];
1193 if (serial->open_count > 0) {
1194 count = put_rxbuf_data(urb, serial);
1195 if (count == -1)
1196 return;
1197 }
1198 /* Re issue a read as long as we receive data. */
1199
1200 if (count == 0 && ((urb->actual_length != 0) ||
1201 (serial->rx_state == RX_PENDING))) {
1202 serial->rx_state = RX_SENT;
1203 hso_mux_serial_read(serial);
1204 } else
1205 serial->rx_state = RX_IDLE;
1206 }
1207
1208
1209 /* read callback for Diag and CS port */
1210 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1211 {
1212 struct hso_serial *serial = urb->context;
1213 int status = urb->status;
1214
1215 /* sanity check */
1216 if (!serial) {
1217 D1("serial == NULL");
1218 return;
1219 } else if (status) {
1220 handle_usb_error(status, __func__, serial->parent);
1221 return;
1222 }
1223
1224 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1225 D1("Actual length = %d\n", urb->actual_length);
1226 DUMP1(urb->transfer_buffer, urb->actual_length);
1227
1228 /* Anyone listening? */
1229 if (serial->open_count == 0)
1230 return;
1231
1232 if (status == 0) {
1233 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1234 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1235 /* Valid data, handle RX data */
1236 spin_lock(&serial->serial_lock);
1237 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1238 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1239 spin_unlock(&serial->serial_lock);
1240 } else if (status == -ENOENT || status == -ECONNRESET) {
1241 /* Unlinked - check for throttled port. */
1242 D2("Port %d, successfully unlinked urb", serial->minor);
1243 spin_lock(&serial->serial_lock);
1244 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1245 hso_resubmit_rx_bulk_urb(serial, urb);
1246 spin_unlock(&serial->serial_lock);
1247 } else {
1248 D2("Port %d, status = %d for read urb", serial->minor, status);
1249 return;
1250 }
1251 }
1252
1253 /*
1254 * This needs to be a tasklet otherwise we will
1255 * end up recursively calling this function.
1256 */
1257 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1258 {
1259 unsigned long flags;
1260
1261 spin_lock_irqsave(&serial->serial_lock, flags);
1262 if ((serial->parent->port_spec & HSO_INTF_MUX))
1263 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1264 else
1265 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1266 spin_unlock_irqrestore(&serial->serial_lock, flags);
1267 }
1268
1269 static void hso_unthrottle(struct tty_struct *tty)
1270 {
1271 struct hso_serial *serial = get_serial_by_tty(tty);
1272
1273 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1274 }
1275
1276 static void hso_unthrottle_workfunc(struct work_struct *work)
1277 {
1278 struct hso_serial *serial =
1279 container_of(work, struct hso_serial,
1280 retry_unthrottle_workqueue);
1281 hso_unthrottle_tasklet(serial);
1282 }
1283
1284 /* open the requested serial port */
1285 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1286 {
1287 struct hso_serial *serial = get_serial_by_index(tty->index);
1288 int result;
1289
1290 /* sanity check */
1291 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1292 WARN_ON(1);
1293 tty->driver_data = NULL;
1294 D1("Failed to open port");
1295 return -ENODEV;
1296 }
1297
1298 mutex_lock(&serial->parent->mutex);
1299 result = usb_autopm_get_interface(serial->parent->interface);
1300 if (result < 0)
1301 goto err_out;
1302
1303 D1("Opening %d", serial->minor);
1304 kref_get(&serial->parent->ref);
1305
1306 /* setup */
1307 spin_lock_irq(&serial->serial_lock);
1308 tty->driver_data = serial;
1309 tty_kref_put(serial->tty);
1310 serial->tty = tty_kref_get(tty);
1311 spin_unlock_irq(&serial->serial_lock);
1312
1313 /* check for port already opened, if not set the termios */
1314 serial->open_count++;
1315 if (serial->open_count == 1) {
1316 serial->rx_state = RX_IDLE;
1317 /* Force default termio settings */
1318 _hso_serial_set_termios(tty, NULL);
1319 tasklet_init(&serial->unthrottle_tasklet,
1320 (void (*)(unsigned long))hso_unthrottle_tasklet,
1321 (unsigned long)serial);
1322 INIT_WORK(&serial->retry_unthrottle_workqueue,
1323 hso_unthrottle_workfunc);
1324 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1325 if (result) {
1326 hso_stop_serial_device(serial->parent);
1327 serial->open_count--;
1328 kref_put(&serial->parent->ref, hso_serial_ref_free);
1329 }
1330 } else {
1331 D1("Port was already open");
1332 }
1333
1334 usb_autopm_put_interface(serial->parent->interface);
1335
1336 /* done */
1337 if (result)
1338 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1339 err_out:
1340 mutex_unlock(&serial->parent->mutex);
1341 return result;
1342 }
1343
1344 /* close the requested serial port */
1345 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1346 {
1347 struct hso_serial *serial = tty->driver_data;
1348 u8 usb_gone;
1349
1350 D1("Closing serial port");
1351
1352 /* Open failed, no close cleanup required */
1353 if (serial == NULL)
1354 return;
1355
1356 mutex_lock(&serial->parent->mutex);
1357 usb_gone = serial->parent->usb_gone;
1358
1359 if (!usb_gone)
1360 usb_autopm_get_interface(serial->parent->interface);
1361
1362 /* reset the rts and dtr */
1363 /* do the actual close */
1364 serial->open_count--;
1365
1366 if (serial->open_count <= 0) {
1367 serial->open_count = 0;
1368 spin_lock_irq(&serial->serial_lock);
1369 if (serial->tty == tty) {
1370 serial->tty->driver_data = NULL;
1371 serial->tty = NULL;
1372 tty_kref_put(tty);
1373 }
1374 spin_unlock_irq(&serial->serial_lock);
1375 if (!usb_gone)
1376 hso_stop_serial_device(serial->parent);
1377 tasklet_kill(&serial->unthrottle_tasklet);
1378 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1379 }
1380
1381 if (!usb_gone)
1382 usb_autopm_put_interface(serial->parent->interface);
1383
1384 mutex_unlock(&serial->parent->mutex);
1385
1386 kref_put(&serial->parent->ref, hso_serial_ref_free);
1387 }
1388
1389 /* close the requested serial port */
1390 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1391 int count)
1392 {
1393 struct hso_serial *serial = get_serial_by_tty(tty);
1394 int space, tx_bytes;
1395 unsigned long flags;
1396
1397 /* sanity check */
1398 if (serial == NULL) {
1399 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1400 return -ENODEV;
1401 }
1402
1403 spin_lock_irqsave(&serial->serial_lock, flags);
1404
1405 space = serial->tx_data_length - serial->tx_buffer_count;
1406 tx_bytes = (count < space) ? count : space;
1407
1408 if (!tx_bytes)
1409 goto out;
1410
1411 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1412 serial->tx_buffer_count += tx_bytes;
1413
1414 out:
1415 spin_unlock_irqrestore(&serial->serial_lock, flags);
1416
1417 hso_kick_transmit(serial);
1418 /* done */
1419 return tx_bytes;
1420 }
1421
1422 /* how much room is there for writing */
1423 static int hso_serial_write_room(struct tty_struct *tty)
1424 {
1425 struct hso_serial *serial = get_serial_by_tty(tty);
1426 int room;
1427 unsigned long flags;
1428
1429 spin_lock_irqsave(&serial->serial_lock, flags);
1430 room = serial->tx_data_length - serial->tx_buffer_count;
1431 spin_unlock_irqrestore(&serial->serial_lock, flags);
1432
1433 /* return free room */
1434 return room;
1435 }
1436
1437 /* setup the term */
1438 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1439 {
1440 struct hso_serial *serial = get_serial_by_tty(tty);
1441 unsigned long flags;
1442
1443 if (old)
1444 D5("Termios called with: cflags new[%d] - old[%d]",
1445 tty->termios->c_cflag, old->c_cflag);
1446
1447 /* the actual setup */
1448 spin_lock_irqsave(&serial->serial_lock, flags);
1449 if (serial->open_count)
1450 _hso_serial_set_termios(tty, old);
1451 else
1452 tty->termios = old;
1453 spin_unlock_irqrestore(&serial->serial_lock, flags);
1454
1455 /* done */
1456 }
1457
1458 /* how many characters in the buffer */
1459 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1460 {
1461 struct hso_serial *serial = get_serial_by_tty(tty);
1462 int chars;
1463 unsigned long flags;
1464
1465 /* sanity check */
1466 if (serial == NULL)
1467 return 0;
1468
1469 spin_lock_irqsave(&serial->serial_lock, flags);
1470 chars = serial->tx_buffer_count;
1471 spin_unlock_irqrestore(&serial->serial_lock, flags);
1472
1473 return chars;
1474 }
1475 static int tiocmget_submit_urb(struct hso_serial *serial,
1476 struct hso_tiocmget *tiocmget,
1477 struct usb_device *usb)
1478 {
1479 int result;
1480
1481 if (serial->parent->usb_gone)
1482 return -ENODEV;
1483 usb_fill_int_urb(tiocmget->urb, usb,
1484 usb_rcvintpipe(usb,
1485 tiocmget->endp->
1486 bEndpointAddress & 0x7F),
1487 &tiocmget->serial_state_notification,
1488 sizeof(struct hso_serial_state_notification),
1489 tiocmget_intr_callback, serial,
1490 tiocmget->endp->bInterval);
1491 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1492 if (result) {
1493 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1494 result);
1495 }
1496 return result;
1497
1498 }
1499
1500 static void tiocmget_intr_callback(struct urb *urb)
1501 {
1502 struct hso_serial *serial = urb->context;
1503 struct hso_tiocmget *tiocmget;
1504 int status = urb->status;
1505 u16 UART_state_bitmap, prev_UART_state_bitmap;
1506 struct uart_icount *icount;
1507 struct hso_serial_state_notification *serial_state_notification;
1508 struct usb_device *usb;
1509
1510 /* Sanity checks */
1511 if (!serial)
1512 return;
1513 if (status) {
1514 handle_usb_error(status, __func__, serial->parent);
1515 return;
1516 }
1517 tiocmget = serial->tiocmget;
1518 if (!tiocmget)
1519 return;
1520 usb = serial->parent->usb;
1521 serial_state_notification = &tiocmget->serial_state_notification;
1522 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1523 serial_state_notification->bNotification != B_NOTIFICATION ||
1524 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1525 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1526 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1527 dev_warn(&usb->dev,
1528 "hso received invalid serial state notification\n");
1529 DUMP(serial_state_notification,
1530 sizeof(struct hso_serial_state_notification));
1531 } else {
1532
1533 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1534 UART_state_bitmap);
1535 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1536 icount = &tiocmget->icount;
1537 spin_lock(&serial->serial_lock);
1538 if ((UART_state_bitmap & B_OVERRUN) !=
1539 (prev_UART_state_bitmap & B_OVERRUN))
1540 icount->parity++;
1541 if ((UART_state_bitmap & B_PARITY) !=
1542 (prev_UART_state_bitmap & B_PARITY))
1543 icount->parity++;
1544 if ((UART_state_bitmap & B_FRAMING) !=
1545 (prev_UART_state_bitmap & B_FRAMING))
1546 icount->frame++;
1547 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1548 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1549 icount->rng++;
1550 if ((UART_state_bitmap & B_BREAK) !=
1551 (prev_UART_state_bitmap & B_BREAK))
1552 icount->brk++;
1553 if ((UART_state_bitmap & B_TX_CARRIER) !=
1554 (prev_UART_state_bitmap & B_TX_CARRIER))
1555 icount->dsr++;
1556 if ((UART_state_bitmap & B_RX_CARRIER) !=
1557 (prev_UART_state_bitmap & B_RX_CARRIER))
1558 icount->dcd++;
1559 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1560 spin_unlock(&serial->serial_lock);
1561 tiocmget->intr_completed = 1;
1562 wake_up_interruptible(&tiocmget->waitq);
1563 }
1564 memset(serial_state_notification, 0,
1565 sizeof(struct hso_serial_state_notification));
1566 tiocmget_submit_urb(serial,
1567 tiocmget,
1568 serial->parent->usb);
1569 }
1570
1571 /*
1572 * next few functions largely stolen from drivers/serial/serial_core.c
1573 */
1574 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1575 * - mask passed in arg for lines of interest
1576 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1577 * Caller should use TIOCGICOUNT to see which one it was
1578 */
1579 static int
1580 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1581 {
1582 DECLARE_WAITQUEUE(wait, current);
1583 struct uart_icount cprev, cnow;
1584 struct hso_tiocmget *tiocmget;
1585 int ret;
1586
1587 tiocmget = serial->tiocmget;
1588 if (!tiocmget)
1589 return -ENOENT;
1590 /*
1591 * note the counters on entry
1592 */
1593 spin_lock_irq(&serial->serial_lock);
1594 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1595 spin_unlock_irq(&serial->serial_lock);
1596 add_wait_queue(&tiocmget->waitq, &wait);
1597 for (;;) {
1598 spin_lock_irq(&serial->serial_lock);
1599 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1600 spin_unlock_irq(&serial->serial_lock);
1601 set_current_state(TASK_INTERRUPTIBLE);
1602 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1603 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1604 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1605 ret = 0;
1606 break;
1607 }
1608 schedule();
1609 /* see if a signal did it */
1610 if (signal_pending(current)) {
1611 ret = -ERESTARTSYS;
1612 break;
1613 }
1614 cprev = cnow;
1615 }
1616 current->state = TASK_RUNNING;
1617 remove_wait_queue(&tiocmget->waitq, &wait);
1618
1619 return ret;
1620 }
1621
1622 /*
1623 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1624 * Return: write counters to the user passed counter struct
1625 * NB: both 1->0 and 0->1 transitions are counted except for
1626 * RI where only 0->1 is counted.
1627 */
1628 static int hso_get_count(struct tty_struct *tty,
1629 struct serial_icounter_struct *icount)
1630 {
1631 struct uart_icount cnow;
1632 struct hso_serial *serial = get_serial_by_tty(tty);
1633 struct hso_tiocmget *tiocmget = serial->tiocmget;
1634
1635 memset(&icount, 0, sizeof(struct serial_icounter_struct));
1636
1637 if (!tiocmget)
1638 return -ENOENT;
1639 spin_lock_irq(&serial->serial_lock);
1640 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1641 spin_unlock_irq(&serial->serial_lock);
1642
1643 icount->cts = cnow.cts;
1644 icount->dsr = cnow.dsr;
1645 icount->rng = cnow.rng;
1646 icount->dcd = cnow.dcd;
1647 icount->rx = cnow.rx;
1648 icount->tx = cnow.tx;
1649 icount->frame = cnow.frame;
1650 icount->overrun = cnow.overrun;
1651 icount->parity = cnow.parity;
1652 icount->brk = cnow.brk;
1653 icount->buf_overrun = cnow.buf_overrun;
1654
1655 return 0;
1656 }
1657
1658
1659 static int hso_serial_tiocmget(struct tty_struct *tty)
1660 {
1661 int retval;
1662 struct hso_serial *serial = get_serial_by_tty(tty);
1663 struct hso_tiocmget *tiocmget;
1664 u16 UART_state_bitmap;
1665
1666 /* sanity check */
1667 if (!serial) {
1668 D1("no tty structures");
1669 return -EINVAL;
1670 }
1671 spin_lock_irq(&serial->serial_lock);
1672 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1673 ((serial->dtr_state) ? TIOCM_DTR : 0);
1674 tiocmget = serial->tiocmget;
1675 if (tiocmget) {
1676
1677 UART_state_bitmap = le16_to_cpu(
1678 tiocmget->prev_UART_state_bitmap);
1679 if (UART_state_bitmap & B_RING_SIGNAL)
1680 retval |= TIOCM_RNG;
1681 if (UART_state_bitmap & B_RX_CARRIER)
1682 retval |= TIOCM_CD;
1683 if (UART_state_bitmap & B_TX_CARRIER)
1684 retval |= TIOCM_DSR;
1685 }
1686 spin_unlock_irq(&serial->serial_lock);
1687 return retval;
1688 }
1689
1690 static int hso_serial_tiocmset(struct tty_struct *tty,
1691 unsigned int set, unsigned int clear)
1692 {
1693 int val = 0;
1694 unsigned long flags;
1695 int if_num;
1696 struct hso_serial *serial = get_serial_by_tty(tty);
1697
1698 /* sanity check */
1699 if (!serial) {
1700 D1("no tty structures");
1701 return -EINVAL;
1702 }
1703
1704 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1705 return -EINVAL;
1706
1707 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1708
1709 spin_lock_irqsave(&serial->serial_lock, flags);
1710 if (set & TIOCM_RTS)
1711 serial->rts_state = 1;
1712 if (set & TIOCM_DTR)
1713 serial->dtr_state = 1;
1714
1715 if (clear & TIOCM_RTS)
1716 serial->rts_state = 0;
1717 if (clear & TIOCM_DTR)
1718 serial->dtr_state = 0;
1719
1720 if (serial->dtr_state)
1721 val |= 0x01;
1722 if (serial->rts_state)
1723 val |= 0x02;
1724
1725 spin_unlock_irqrestore(&serial->serial_lock, flags);
1726
1727 return usb_control_msg(serial->parent->usb,
1728 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1729 0x21, val, if_num, NULL, 0,
1730 USB_CTRL_SET_TIMEOUT);
1731 }
1732
1733 static int hso_serial_ioctl(struct tty_struct *tty,
1734 unsigned int cmd, unsigned long arg)
1735 {
1736 struct hso_serial *serial = get_serial_by_tty(tty);
1737 int ret = 0;
1738 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1739
1740 if (!serial)
1741 return -ENODEV;
1742 switch (cmd) {
1743 case TIOCMIWAIT:
1744 ret = hso_wait_modem_status(serial, arg);
1745 break;
1746 default:
1747 ret = -ENOIOCTLCMD;
1748 break;
1749 }
1750 return ret;
1751 }
1752
1753
1754 /* starts a transmit */
1755 static void hso_kick_transmit(struct hso_serial *serial)
1756 {
1757 u8 *temp;
1758 unsigned long flags;
1759 int res;
1760
1761 spin_lock_irqsave(&serial->serial_lock, flags);
1762 if (!serial->tx_buffer_count)
1763 goto out;
1764
1765 if (serial->tx_urb_used)
1766 goto out;
1767
1768 /* Wakeup USB interface if necessary */
1769 if (hso_get_activity(serial->parent) == -EAGAIN)
1770 goto out;
1771
1772 /* Switch pointers around to avoid memcpy */
1773 temp = serial->tx_buffer;
1774 serial->tx_buffer = serial->tx_data;
1775 serial->tx_data = temp;
1776 serial->tx_data_count = serial->tx_buffer_count;
1777 serial->tx_buffer_count = 0;
1778
1779 /* If temp is set, it means we switched buffers */
1780 if (temp && serial->write_data) {
1781 res = serial->write_data(serial);
1782 if (res >= 0)
1783 serial->tx_urb_used = 1;
1784 }
1785 out:
1786 spin_unlock_irqrestore(&serial->serial_lock, flags);
1787 }
1788
1789 /* make a request (for reading and writing data to muxed serial port) */
1790 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1791 struct urb *ctrl_urb,
1792 struct usb_ctrlrequest *ctrl_req,
1793 u8 *ctrl_urb_data, u32 size)
1794 {
1795 int result;
1796 int pipe;
1797
1798 /* Sanity check */
1799 if (!serial || !ctrl_urb || !ctrl_req) {
1800 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1801 return -EINVAL;
1802 }
1803
1804 /* initialize */
1805 ctrl_req->wValue = 0;
1806 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1807 ctrl_req->wLength = cpu_to_le16(size);
1808
1809 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1810 /* Reading command */
1811 ctrl_req->bRequestType = USB_DIR_IN |
1812 USB_TYPE_OPTION_VENDOR |
1813 USB_RECIP_INTERFACE;
1814 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1815 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1816 } else {
1817 /* Writing command */
1818 ctrl_req->bRequestType = USB_DIR_OUT |
1819 USB_TYPE_OPTION_VENDOR |
1820 USB_RECIP_INTERFACE;
1821 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1822 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1823 }
1824 /* syslog */
1825 D2("%s command (%02x) len: %d, port: %d",
1826 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1827 ctrl_req->bRequestType, ctrl_req->wLength, port);
1828
1829 /* Load ctrl urb */
1830 ctrl_urb->transfer_flags = 0;
1831 usb_fill_control_urb(ctrl_urb,
1832 serial->parent->usb,
1833 pipe,
1834 (u8 *) ctrl_req,
1835 ctrl_urb_data, size, ctrl_callback, serial);
1836 /* Send it on merry way */
1837 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1838 if (result) {
1839 dev_err(&ctrl_urb->dev->dev,
1840 "%s failed submit ctrl_urb %d type %d\n", __func__,
1841 result, type);
1842 return result;
1843 }
1844
1845 /* done */
1846 return size;
1847 }
1848
1849 /* called by intr_callback when read occurs */
1850 static int hso_mux_serial_read(struct hso_serial *serial)
1851 {
1852 if (!serial)
1853 return -EINVAL;
1854
1855 /* clean data */
1856 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1857 /* make the request */
1858
1859 if (serial->num_rx_urbs != 1) {
1860 dev_err(&serial->parent->interface->dev,
1861 "ERROR: mux'd reads with multiple buffers "
1862 "not possible\n");
1863 return 0;
1864 }
1865 return mux_device_request(serial,
1866 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1867 serial->parent->port_spec & HSO_PORT_MASK,
1868 serial->rx_urb[0],
1869 &serial->ctrl_req_rx,
1870 serial->rx_data[0], serial->rx_data_length);
1871 }
1872
1873 /* used for muxed serial port callback (muxed serial read) */
1874 static void intr_callback(struct urb *urb)
1875 {
1876 struct hso_shared_int *shared_int = urb->context;
1877 struct hso_serial *serial;
1878 unsigned char *port_req;
1879 int status = urb->status;
1880 int i;
1881
1882 usb_mark_last_busy(urb->dev);
1883
1884 /* sanity check */
1885 if (!shared_int)
1886 return;
1887
1888 /* status check */
1889 if (status) {
1890 handle_usb_error(status, __func__, NULL);
1891 return;
1892 }
1893 D4("\n--- Got intr callback 0x%02X ---", status);
1894
1895 /* what request? */
1896 port_req = urb->transfer_buffer;
1897 D4(" port_req = 0x%.2X\n", *port_req);
1898 /* loop over all muxed ports to find the one sending this */
1899 for (i = 0; i < 8; i++) {
1900 /* max 8 channels on MUX */
1901 if (*port_req & (1 << i)) {
1902 serial = get_serial_by_shared_int_and_type(shared_int,
1903 (1 << i));
1904 if (serial != NULL) {
1905 D1("Pending read interrupt on port %d\n", i);
1906 spin_lock(&serial->serial_lock);
1907 if (serial->rx_state == RX_IDLE &&
1908 serial->open_count > 0) {
1909 /* Setup and send a ctrl req read on
1910 * port i */
1911 if (!serial->rx_urb_filled[0]) {
1912 serial->rx_state = RX_SENT;
1913 hso_mux_serial_read(serial);
1914 } else
1915 serial->rx_state = RX_PENDING;
1916 } else {
1917 D1("Already a read pending on "
1918 "port %d or port not open\n", i);
1919 }
1920 spin_unlock(&serial->serial_lock);
1921 }
1922 }
1923 }
1924 /* Resubmit interrupt urb */
1925 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1926 }
1927
1928 /* called for writing to muxed serial port */
1929 static int hso_mux_serial_write_data(struct hso_serial *serial)
1930 {
1931 if (NULL == serial)
1932 return -EINVAL;
1933
1934 return mux_device_request(serial,
1935 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1936 serial->parent->port_spec & HSO_PORT_MASK,
1937 serial->tx_urb,
1938 &serial->ctrl_req_tx,
1939 serial->tx_data, serial->tx_data_count);
1940 }
1941
1942 /* write callback for Diag and CS port */
1943 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1944 {
1945 struct hso_serial *serial = urb->context;
1946 int status = urb->status;
1947 struct tty_struct *tty;
1948
1949 /* sanity check */
1950 if (!serial) {
1951 D1("serial == NULL");
1952 return;
1953 }
1954
1955 spin_lock(&serial->serial_lock);
1956 serial->tx_urb_used = 0;
1957 tty = tty_kref_get(serial->tty);
1958 spin_unlock(&serial->serial_lock);
1959 if (status) {
1960 handle_usb_error(status, __func__, serial->parent);
1961 tty_kref_put(tty);
1962 return;
1963 }
1964 hso_put_activity(serial->parent);
1965 if (tty) {
1966 tty_wakeup(tty);
1967 tty_kref_put(tty);
1968 }
1969 hso_kick_transmit(serial);
1970
1971 D1(" ");
1972 }
1973
1974 /* called for writing diag or CS serial port */
1975 static int hso_std_serial_write_data(struct hso_serial *serial)
1976 {
1977 int count = serial->tx_data_count;
1978 int result;
1979
1980 usb_fill_bulk_urb(serial->tx_urb,
1981 serial->parent->usb,
1982 usb_sndbulkpipe(serial->parent->usb,
1983 serial->out_endp->
1984 bEndpointAddress & 0x7F),
1985 serial->tx_data, serial->tx_data_count,
1986 hso_std_serial_write_bulk_callback, serial);
1987
1988 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1989 if (result) {
1990 dev_warn(&serial->parent->usb->dev,
1991 "Failed to submit urb - res %d\n", result);
1992 return result;
1993 }
1994
1995 return count;
1996 }
1997
1998 /* callback after read or write on muxed serial port */
1999 static void ctrl_callback(struct urb *urb)
2000 {
2001 struct hso_serial *serial = urb->context;
2002 struct usb_ctrlrequest *req;
2003 int status = urb->status;
2004 struct tty_struct *tty;
2005
2006 /* sanity check */
2007 if (!serial)
2008 return;
2009
2010 spin_lock(&serial->serial_lock);
2011 serial->tx_urb_used = 0;
2012 tty = tty_kref_get(serial->tty);
2013 spin_unlock(&serial->serial_lock);
2014 if (status) {
2015 handle_usb_error(status, __func__, serial->parent);
2016 tty_kref_put(tty);
2017 return;
2018 }
2019
2020 /* what request? */
2021 req = (struct usb_ctrlrequest *)(urb->setup_packet);
2022 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2023 D4("Actual length of urb = %d\n", urb->actual_length);
2024 DUMP1(urb->transfer_buffer, urb->actual_length);
2025
2026 if (req->bRequestType ==
2027 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2028 /* response to a read command */
2029 serial->rx_urb_filled[0] = 1;
2030 spin_lock(&serial->serial_lock);
2031 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2032 spin_unlock(&serial->serial_lock);
2033 } else {
2034 hso_put_activity(serial->parent);
2035 if (tty)
2036 tty_wakeup(tty);
2037 /* response to a write command */
2038 hso_kick_transmit(serial);
2039 }
2040 tty_kref_put(tty);
2041 }
2042
2043 /* handle RX data for serial port */
2044 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2045 {
2046 struct tty_struct *tty;
2047 int write_length_remaining = 0;
2048 int curr_write_len;
2049
2050 /* Sanity check */
2051 if (urb == NULL || serial == NULL) {
2052 D1("serial = NULL");
2053 return -2;
2054 }
2055
2056 /* All callers to put_rxbuf_data hold serial_lock */
2057 tty = tty_kref_get(serial->tty);
2058
2059 /* Push data to tty */
2060 if (tty) {
2061 write_length_remaining = urb->actual_length -
2062 serial->curr_rx_urb_offset;
2063 D1("data to push to tty");
2064 while (write_length_remaining) {
2065 if (test_bit(TTY_THROTTLED, &tty->flags)) {
2066 tty_kref_put(tty);
2067 return -1;
2068 }
2069 curr_write_len = tty_insert_flip_string
2070 (tty, urb->transfer_buffer +
2071 serial->curr_rx_urb_offset,
2072 write_length_remaining);
2073 serial->curr_rx_urb_offset += curr_write_len;
2074 write_length_remaining -= curr_write_len;
2075 tty_flip_buffer_push(tty);
2076 }
2077 }
2078 if (write_length_remaining == 0) {
2079 serial->curr_rx_urb_offset = 0;
2080 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2081 }
2082 tty_kref_put(tty);
2083 return write_length_remaining;
2084 }
2085
2086
2087 /* Base driver functions */
2088
2089 static void hso_log_port(struct hso_device *hso_dev)
2090 {
2091 char *port_type;
2092 char port_dev[20];
2093
2094 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2095 case HSO_PORT_CONTROL:
2096 port_type = "Control";
2097 break;
2098 case HSO_PORT_APP:
2099 port_type = "Application";
2100 break;
2101 case HSO_PORT_GPS:
2102 port_type = "GPS";
2103 break;
2104 case HSO_PORT_GPS_CONTROL:
2105 port_type = "GPS control";
2106 break;
2107 case HSO_PORT_APP2:
2108 port_type = "Application2";
2109 break;
2110 case HSO_PORT_PCSC:
2111 port_type = "PCSC";
2112 break;
2113 case HSO_PORT_DIAG:
2114 port_type = "Diagnostic";
2115 break;
2116 case HSO_PORT_DIAG2:
2117 port_type = "Diagnostic2";
2118 break;
2119 case HSO_PORT_MODEM:
2120 port_type = "Modem";
2121 break;
2122 case HSO_PORT_NETWORK:
2123 port_type = "Network";
2124 break;
2125 default:
2126 port_type = "Unknown";
2127 break;
2128 }
2129 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2130 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2131 } else
2132 sprintf(port_dev, "/dev/%s%d", tty_filename,
2133 dev2ser(hso_dev)->minor);
2134
2135 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2136 port_type, port_dev);
2137 }
2138
2139 static int hso_start_net_device(struct hso_device *hso_dev)
2140 {
2141 int i, result = 0;
2142 struct hso_net *hso_net = dev2net(hso_dev);
2143
2144 if (!hso_net)
2145 return -ENODEV;
2146
2147 /* send URBs for all read buffers */
2148 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2149
2150 /* Prep a receive URB */
2151 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2152 hso_dev->usb,
2153 usb_rcvbulkpipe(hso_dev->usb,
2154 hso_net->in_endp->
2155 bEndpointAddress & 0x7F),
2156 hso_net->mux_bulk_rx_buf_pool[i],
2157 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2158 hso_net);
2159
2160 /* Put it out there so the device can send us stuff */
2161 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2162 GFP_NOIO);
2163 if (result)
2164 dev_warn(&hso_dev->usb->dev,
2165 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2166 i, result);
2167 }
2168
2169 return result;
2170 }
2171
2172 static int hso_stop_net_device(struct hso_device *hso_dev)
2173 {
2174 int i;
2175 struct hso_net *hso_net = dev2net(hso_dev);
2176
2177 if (!hso_net)
2178 return -ENODEV;
2179
2180 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2181 if (hso_net->mux_bulk_rx_urb_pool[i])
2182 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2183
2184 }
2185 if (hso_net->mux_bulk_tx_urb)
2186 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2187
2188 return 0;
2189 }
2190
2191 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2192 {
2193 int i, result = 0;
2194 struct hso_serial *serial = dev2ser(hso_dev);
2195
2196 if (!serial)
2197 return -ENODEV;
2198
2199 /* If it is not the MUX port fill in and submit a bulk urb (already
2200 * allocated in hso_serial_start) */
2201 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2202 for (i = 0; i < serial->num_rx_urbs; i++) {
2203 usb_fill_bulk_urb(serial->rx_urb[i],
2204 serial->parent->usb,
2205 usb_rcvbulkpipe(serial->parent->usb,
2206 serial->in_endp->
2207 bEndpointAddress &
2208 0x7F),
2209 serial->rx_data[i],
2210 serial->rx_data_length,
2211 hso_std_serial_read_bulk_callback,
2212 serial);
2213 result = usb_submit_urb(serial->rx_urb[i], flags);
2214 if (result) {
2215 dev_warn(&serial->parent->usb->dev,
2216 "Failed to submit urb - res %d\n",
2217 result);
2218 break;
2219 }
2220 }
2221 } else {
2222 mutex_lock(&serial->shared_int->shared_int_lock);
2223 if (!serial->shared_int->use_count) {
2224 result =
2225 hso_mux_submit_intr_urb(serial->shared_int,
2226 hso_dev->usb, flags);
2227 }
2228 serial->shared_int->use_count++;
2229 mutex_unlock(&serial->shared_int->shared_int_lock);
2230 }
2231 if (serial->tiocmget)
2232 tiocmget_submit_urb(serial,
2233 serial->tiocmget,
2234 serial->parent->usb);
2235 return result;
2236 }
2237
2238 static int hso_stop_serial_device(struct hso_device *hso_dev)
2239 {
2240 int i;
2241 struct hso_serial *serial = dev2ser(hso_dev);
2242 struct hso_tiocmget *tiocmget;
2243
2244 if (!serial)
2245 return -ENODEV;
2246
2247 for (i = 0; i < serial->num_rx_urbs; i++) {
2248 if (serial->rx_urb[i]) {
2249 usb_kill_urb(serial->rx_urb[i]);
2250 serial->rx_urb_filled[i] = 0;
2251 }
2252 }
2253 serial->curr_rx_urb_idx = 0;
2254 serial->curr_rx_urb_offset = 0;
2255
2256 if (serial->tx_urb)
2257 usb_kill_urb(serial->tx_urb);
2258
2259 if (serial->shared_int) {
2260 mutex_lock(&serial->shared_int->shared_int_lock);
2261 if (serial->shared_int->use_count &&
2262 (--serial->shared_int->use_count == 0)) {
2263 struct urb *urb;
2264
2265 urb = serial->shared_int->shared_intr_urb;
2266 if (urb)
2267 usb_kill_urb(urb);
2268 }
2269 mutex_unlock(&serial->shared_int->shared_int_lock);
2270 }
2271 tiocmget = serial->tiocmget;
2272 if (tiocmget) {
2273 wake_up_interruptible(&tiocmget->waitq);
2274 usb_kill_urb(tiocmget->urb);
2275 }
2276
2277 return 0;
2278 }
2279
2280 static void hso_serial_common_free(struct hso_serial *serial)
2281 {
2282 int i;
2283
2284 if (serial->parent->dev)
2285 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2286
2287 tty_unregister_device(tty_drv, serial->minor);
2288
2289 for (i = 0; i < serial->num_rx_urbs; i++) {
2290 /* unlink and free RX URB */
2291 usb_free_urb(serial->rx_urb[i]);
2292 /* free the RX buffer */
2293 kfree(serial->rx_data[i]);
2294 }
2295
2296 /* unlink and free TX URB */
2297 usb_free_urb(serial->tx_urb);
2298 kfree(serial->tx_data);
2299 }
2300
2301 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2302 int rx_size, int tx_size)
2303 {
2304 struct device *dev;
2305 int minor;
2306 int i;
2307
2308 minor = get_free_serial_index();
2309 if (minor < 0)
2310 goto exit;
2311
2312 /* register our minor number */
2313 serial->parent->dev = tty_register_device(tty_drv, minor,
2314 &serial->parent->interface->dev);
2315 dev = serial->parent->dev;
2316 dev_set_drvdata(dev, serial->parent);
2317 i = device_create_file(dev, &dev_attr_hsotype);
2318
2319 /* fill in specific data for later use */
2320 serial->minor = minor;
2321 serial->magic = HSO_SERIAL_MAGIC;
2322 spin_lock_init(&serial->serial_lock);
2323 serial->num_rx_urbs = num_urbs;
2324
2325 /* RX, allocate urb and initialize */
2326
2327 /* prepare our RX buffer */
2328 serial->rx_data_length = rx_size;
2329 for (i = 0; i < serial->num_rx_urbs; i++) {
2330 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2331 if (!serial->rx_urb[i]) {
2332 dev_err(dev, "Could not allocate urb?\n");
2333 goto exit;
2334 }
2335 serial->rx_urb[i]->transfer_buffer = NULL;
2336 serial->rx_urb[i]->transfer_buffer_length = 0;
2337 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2338 GFP_KERNEL);
2339 if (!serial->rx_data[i]) {
2340 dev_err(dev, "%s - Out of memory\n", __func__);
2341 goto exit;
2342 }
2343 }
2344
2345 /* TX, allocate urb and initialize */
2346 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2347 if (!serial->tx_urb) {
2348 dev_err(dev, "Could not allocate urb?\n");
2349 goto exit;
2350 }
2351 serial->tx_urb->transfer_buffer = NULL;
2352 serial->tx_urb->transfer_buffer_length = 0;
2353 /* prepare our TX buffer */
2354 serial->tx_data_count = 0;
2355 serial->tx_buffer_count = 0;
2356 serial->tx_data_length = tx_size;
2357 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2358 if (!serial->tx_data) {
2359 dev_err(dev, "%s - Out of memory\n", __func__);
2360 goto exit;
2361 }
2362 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2363 if (!serial->tx_buffer) {
2364 dev_err(dev, "%s - Out of memory\n", __func__);
2365 goto exit;
2366 }
2367
2368 return 0;
2369 exit:
2370 hso_serial_common_free(serial);
2371 return -1;
2372 }
2373
2374 /* Creates a general hso device */
2375 static struct hso_device *hso_create_device(struct usb_interface *intf,
2376 int port_spec)
2377 {
2378 struct hso_device *hso_dev;
2379
2380 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2381 if (!hso_dev)
2382 return NULL;
2383
2384 hso_dev->port_spec = port_spec;
2385 hso_dev->usb = interface_to_usbdev(intf);
2386 hso_dev->interface = intf;
2387 kref_init(&hso_dev->ref);
2388 mutex_init(&hso_dev->mutex);
2389
2390 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2391 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2392 INIT_WORK(&hso_dev->reset_device, reset_device);
2393
2394 return hso_dev;
2395 }
2396
2397 /* Removes a network device in the network device table */
2398 static int remove_net_device(struct hso_device *hso_dev)
2399 {
2400 int i;
2401
2402 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2403 if (network_table[i] == hso_dev) {
2404 network_table[i] = NULL;
2405 break;
2406 }
2407 }
2408 if (i == HSO_MAX_NET_DEVICES)
2409 return -1;
2410 return 0;
2411 }
2412
2413 /* Frees our network device */
2414 static void hso_free_net_device(struct hso_device *hso_dev)
2415 {
2416 int i;
2417 struct hso_net *hso_net = dev2net(hso_dev);
2418
2419 if (!hso_net)
2420 return;
2421
2422 remove_net_device(hso_net->parent);
2423
2424 if (hso_net->net) {
2425 unregister_netdev(hso_net->net);
2426 free_netdev(hso_net->net);
2427 }
2428
2429 /* start freeing */
2430 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2431 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2432 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2433 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2434 }
2435 usb_free_urb(hso_net->mux_bulk_tx_urb);
2436 kfree(hso_net->mux_bulk_tx_buf);
2437 hso_net->mux_bulk_tx_buf = NULL;
2438
2439 kfree(hso_dev);
2440 }
2441
2442 static const struct net_device_ops hso_netdev_ops = {
2443 .ndo_open = hso_net_open,
2444 .ndo_stop = hso_net_close,
2445 .ndo_start_xmit = hso_net_start_xmit,
2446 .ndo_tx_timeout = hso_net_tx_timeout,
2447 };
2448
2449 /* initialize the network interface */
2450 static void hso_net_init(struct net_device *net)
2451 {
2452 struct hso_net *hso_net = netdev_priv(net);
2453
2454 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2455
2456 /* fill in the other fields */
2457 net->netdev_ops = &hso_netdev_ops;
2458 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2459 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2460 net->type = ARPHRD_NONE;
2461 net->mtu = DEFAULT_MTU - 14;
2462 net->tx_queue_len = 10;
2463 SET_ETHTOOL_OPS(net, &ops);
2464
2465 /* and initialize the semaphore */
2466 spin_lock_init(&hso_net->net_lock);
2467 }
2468
2469 /* Adds a network device in the network device table */
2470 static int add_net_device(struct hso_device *hso_dev)
2471 {
2472 int i;
2473
2474 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2475 if (network_table[i] == NULL) {
2476 network_table[i] = hso_dev;
2477 break;
2478 }
2479 }
2480 if (i == HSO_MAX_NET_DEVICES)
2481 return -1;
2482 return 0;
2483 }
2484
2485 static int hso_rfkill_set_block(void *data, bool blocked)
2486 {
2487 struct hso_device *hso_dev = data;
2488 int enabled = !blocked;
2489 int rv;
2490
2491 mutex_lock(&hso_dev->mutex);
2492 if (hso_dev->usb_gone)
2493 rv = 0;
2494 else
2495 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2496 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2497 USB_CTRL_SET_TIMEOUT);
2498 mutex_unlock(&hso_dev->mutex);
2499 return rv;
2500 }
2501
2502 static const struct rfkill_ops hso_rfkill_ops = {
2503 .set_block = hso_rfkill_set_block,
2504 };
2505
2506 /* Creates and sets up everything for rfkill */
2507 static void hso_create_rfkill(struct hso_device *hso_dev,
2508 struct usb_interface *interface)
2509 {
2510 struct hso_net *hso_net = dev2net(hso_dev);
2511 struct device *dev = &hso_net->net->dev;
2512 char *rfkn;
2513
2514 rfkn = kzalloc(20, GFP_KERNEL);
2515 if (!rfkn)
2516 dev_err(dev, "%s - Out of memory\n", __func__);
2517
2518 snprintf(rfkn, 20, "hso-%d",
2519 interface->altsetting->desc.bInterfaceNumber);
2520
2521 hso_net->rfkill = rfkill_alloc(rfkn,
2522 &interface_to_usbdev(interface)->dev,
2523 RFKILL_TYPE_WWAN,
2524 &hso_rfkill_ops, hso_dev);
2525 if (!hso_net->rfkill) {
2526 dev_err(dev, "%s - Out of memory\n", __func__);
2527 kfree(rfkn);
2528 return;
2529 }
2530 if (rfkill_register(hso_net->rfkill) < 0) {
2531 rfkill_destroy(hso_net->rfkill);
2532 kfree(rfkn);
2533 hso_net->rfkill = NULL;
2534 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2535 return;
2536 }
2537 }
2538
2539 static struct device_type hso_type = {
2540 .name = "wwan",
2541 };
2542
2543 /* Creates our network device */
2544 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2545 int port_spec)
2546 {
2547 int result, i;
2548 struct net_device *net;
2549 struct hso_net *hso_net;
2550 struct hso_device *hso_dev;
2551
2552 hso_dev = hso_create_device(interface, port_spec);
2553 if (!hso_dev)
2554 return NULL;
2555
2556 /* allocate our network device, then we can put in our private data */
2557 /* call hso_net_init to do the basic initialization */
2558 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2559 if (!net) {
2560 dev_err(&interface->dev, "Unable to create ethernet device\n");
2561 goto exit;
2562 }
2563
2564 hso_net = netdev_priv(net);
2565
2566 hso_dev->port_data.dev_net = hso_net;
2567 hso_net->net = net;
2568 hso_net->parent = hso_dev;
2569
2570 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2571 USB_DIR_IN);
2572 if (!hso_net->in_endp) {
2573 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2574 goto exit;
2575 }
2576 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2577 USB_DIR_OUT);
2578 if (!hso_net->out_endp) {
2579 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2580 goto exit;
2581 }
2582 SET_NETDEV_DEV(net, &interface->dev);
2583 SET_NETDEV_DEVTYPE(net, &hso_type);
2584
2585 /* registering our net device */
2586 result = register_netdev(net);
2587 if (result) {
2588 dev_err(&interface->dev, "Failed to register device\n");
2589 goto exit;
2590 }
2591
2592 /* start allocating */
2593 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2594 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2595 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2596 dev_err(&interface->dev, "Could not allocate rx urb\n");
2597 goto exit;
2598 }
2599 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2600 GFP_KERNEL);
2601 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2602 dev_err(&interface->dev, "Could not allocate rx buf\n");
2603 goto exit;
2604 }
2605 }
2606 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2607 if (!hso_net->mux_bulk_tx_urb) {
2608 dev_err(&interface->dev, "Could not allocate tx urb\n");
2609 goto exit;
2610 }
2611 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2612 if (!hso_net->mux_bulk_tx_buf) {
2613 dev_err(&interface->dev, "Could not allocate tx buf\n");
2614 goto exit;
2615 }
2616
2617 add_net_device(hso_dev);
2618
2619 hso_log_port(hso_dev);
2620
2621 hso_create_rfkill(hso_dev, interface);
2622
2623 return hso_dev;
2624 exit:
2625 hso_free_net_device(hso_dev);
2626 return NULL;
2627 }
2628
2629 static void hso_free_tiomget(struct hso_serial *serial)
2630 {
2631 struct hso_tiocmget *tiocmget;
2632 if (!serial)
2633 return;
2634 tiocmget = serial->tiocmget;
2635 if (tiocmget) {
2636 usb_free_urb(tiocmget->urb);
2637 tiocmget->urb = NULL;
2638 serial->tiocmget = NULL;
2639 kfree(tiocmget);
2640 }
2641 }
2642
2643 /* Frees an AT channel ( goes for both mux and non-mux ) */
2644 static void hso_free_serial_device(struct hso_device *hso_dev)
2645 {
2646 struct hso_serial *serial = dev2ser(hso_dev);
2647
2648 if (!serial)
2649 return;
2650 set_serial_by_index(serial->minor, NULL);
2651
2652 hso_serial_common_free(serial);
2653
2654 if (serial->shared_int) {
2655 mutex_lock(&serial->shared_int->shared_int_lock);
2656 if (--serial->shared_int->ref_count == 0)
2657 hso_free_shared_int(serial->shared_int);
2658 else
2659 mutex_unlock(&serial->shared_int->shared_int_lock);
2660 }
2661 hso_free_tiomget(serial);
2662 kfree(serial);
2663 kfree(hso_dev);
2664 }
2665
2666 /* Creates a bulk AT channel */
2667 static struct hso_device *hso_create_bulk_serial_device(
2668 struct usb_interface *interface, int port)
2669 {
2670 struct hso_device *hso_dev;
2671 struct hso_serial *serial;
2672 int num_urbs;
2673 struct hso_tiocmget *tiocmget;
2674
2675 hso_dev = hso_create_device(interface, port);
2676 if (!hso_dev)
2677 return NULL;
2678
2679 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2680 if (!serial)
2681 goto exit;
2682
2683 serial->parent = hso_dev;
2684 hso_dev->port_data.dev_serial = serial;
2685
2686 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2687 num_urbs = 2;
2688 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2689 GFP_KERNEL);
2690 /* it isn't going to break our heart if serial->tiocmget
2691 * allocation fails don't bother checking this.
2692 */
2693 if (serial->tiocmget) {
2694 tiocmget = serial->tiocmget;
2695 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2696 if (tiocmget->urb) {
2697 mutex_init(&tiocmget->mutex);
2698 init_waitqueue_head(&tiocmget->waitq);
2699 tiocmget->endp = hso_get_ep(
2700 interface,
2701 USB_ENDPOINT_XFER_INT,
2702 USB_DIR_IN);
2703 } else
2704 hso_free_tiomget(serial);
2705 }
2706 }
2707 else
2708 num_urbs = 1;
2709
2710 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2711 BULK_URB_TX_SIZE))
2712 goto exit;
2713
2714 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2715 USB_DIR_IN);
2716 if (!serial->in_endp) {
2717 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2718 goto exit2;
2719 }
2720
2721 if (!
2722 (serial->out_endp =
2723 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2724 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2725 goto exit2;
2726 }
2727
2728 serial->write_data = hso_std_serial_write_data;
2729
2730 /* and record this serial */
2731 set_serial_by_index(serial->minor, serial);
2732
2733 /* setup the proc dirs and files if needed */
2734 hso_log_port(hso_dev);
2735
2736 /* done, return it */
2737 return hso_dev;
2738
2739 exit2:
2740 hso_serial_common_free(serial);
2741 exit:
2742 hso_free_tiomget(serial);
2743 kfree(serial);
2744 kfree(hso_dev);
2745 return NULL;
2746 }
2747
2748 /* Creates a multiplexed AT channel */
2749 static
2750 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2751 int port,
2752 struct hso_shared_int *mux)
2753 {
2754 struct hso_device *hso_dev;
2755 struct hso_serial *serial;
2756 int port_spec;
2757
2758 port_spec = HSO_INTF_MUX;
2759 port_spec &= ~HSO_PORT_MASK;
2760
2761 port_spec |= hso_mux_to_port(port);
2762 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2763 return NULL;
2764
2765 hso_dev = hso_create_device(interface, port_spec);
2766 if (!hso_dev)
2767 return NULL;
2768
2769 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2770 if (!serial)
2771 goto exit;
2772
2773 hso_dev->port_data.dev_serial = serial;
2774 serial->parent = hso_dev;
2775
2776 if (hso_serial_common_create
2777 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2778 goto exit;
2779
2780 serial->tx_data_length--;
2781 serial->write_data = hso_mux_serial_write_data;
2782
2783 serial->shared_int = mux;
2784 mutex_lock(&serial->shared_int->shared_int_lock);
2785 serial->shared_int->ref_count++;
2786 mutex_unlock(&serial->shared_int->shared_int_lock);
2787
2788 /* and record this serial */
2789 set_serial_by_index(serial->minor, serial);
2790
2791 /* setup the proc dirs and files if needed */
2792 hso_log_port(hso_dev);
2793
2794 /* done, return it */
2795 return hso_dev;
2796
2797 exit:
2798 if (serial) {
2799 tty_unregister_device(tty_drv, serial->minor);
2800 kfree(serial);
2801 }
2802 if (hso_dev)
2803 kfree(hso_dev);
2804 return NULL;
2805
2806 }
2807
2808 static void hso_free_shared_int(struct hso_shared_int *mux)
2809 {
2810 usb_free_urb(mux->shared_intr_urb);
2811 kfree(mux->shared_intr_buf);
2812 mutex_unlock(&mux->shared_int_lock);
2813 kfree(mux);
2814 }
2815
2816 static
2817 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2818 {
2819 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2820
2821 if (!mux)
2822 return NULL;
2823
2824 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2825 USB_DIR_IN);
2826 if (!mux->intr_endp) {
2827 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2828 goto exit;
2829 }
2830
2831 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2832 if (!mux->shared_intr_urb) {
2833 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2834 goto exit;
2835 }
2836 mux->shared_intr_buf =
2837 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2838 GFP_KERNEL);
2839 if (!mux->shared_intr_buf) {
2840 dev_err(&interface->dev, "Could not allocate intr buf?\n");
2841 goto exit;
2842 }
2843
2844 mutex_init(&mux->shared_int_lock);
2845
2846 return mux;
2847
2848 exit:
2849 kfree(mux->shared_intr_buf);
2850 usb_free_urb(mux->shared_intr_urb);
2851 kfree(mux);
2852 return NULL;
2853 }
2854
2855 /* Gets the port spec for a certain interface */
2856 static int hso_get_config_data(struct usb_interface *interface)
2857 {
2858 struct usb_device *usbdev = interface_to_usbdev(interface);
2859 u8 config_data[17];
2860 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2861 s32 result;
2862
2863 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2864 0x86, 0xC0, 0, 0, config_data, 17,
2865 USB_CTRL_SET_TIMEOUT) != 0x11) {
2866 return -EIO;
2867 }
2868
2869 switch (config_data[if_num]) {
2870 case 0x0:
2871 result = 0;
2872 break;
2873 case 0x1:
2874 result = HSO_PORT_DIAG;
2875 break;
2876 case 0x2:
2877 result = HSO_PORT_GPS;
2878 break;
2879 case 0x3:
2880 result = HSO_PORT_GPS_CONTROL;
2881 break;
2882 case 0x4:
2883 result = HSO_PORT_APP;
2884 break;
2885 case 0x5:
2886 result = HSO_PORT_APP2;
2887 break;
2888 case 0x6:
2889 result = HSO_PORT_CONTROL;
2890 break;
2891 case 0x7:
2892 result = HSO_PORT_NETWORK;
2893 break;
2894 case 0x8:
2895 result = HSO_PORT_MODEM;
2896 break;
2897 case 0x9:
2898 result = HSO_PORT_MSD;
2899 break;
2900 case 0xa:
2901 result = HSO_PORT_PCSC;
2902 break;
2903 case 0xb:
2904 result = HSO_PORT_VOICE;
2905 break;
2906 default:
2907 result = 0;
2908 }
2909
2910 if (result)
2911 result |= HSO_INTF_BULK;
2912
2913 if (config_data[16] & 0x1)
2914 result |= HSO_INFO_CRC_BUG;
2915
2916 return result;
2917 }
2918
2919 /* called once for each interface upon device insertion */
2920 static int hso_probe(struct usb_interface *interface,
2921 const struct usb_device_id *id)
2922 {
2923 int mux, i, if_num, port_spec;
2924 unsigned char port_mask;
2925 struct hso_device *hso_dev = NULL;
2926 struct hso_shared_int *shared_int;
2927 struct hso_device *tmp_dev = NULL;
2928
2929 if_num = interface->altsetting->desc.bInterfaceNumber;
2930
2931 /* Get the interface/port specification from either driver_info or from
2932 * the device itself */
2933 if (id->driver_info)
2934 port_spec = ((u32 *)(id->driver_info))[if_num];
2935 else
2936 port_spec = hso_get_config_data(interface);
2937
2938 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2939 dev_err(&interface->dev, "Not our interface\n");
2940 return -ENODEV;
2941 }
2942 /* Check if we need to switch to alt interfaces prior to port
2943 * configuration */
2944 if (interface->num_altsetting > 1)
2945 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2946 interface->needs_remote_wakeup = 1;
2947
2948 /* Allocate new hso device(s) */
2949 switch (port_spec & HSO_INTF_MASK) {
2950 case HSO_INTF_MUX:
2951 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2952 /* Create the network device */
2953 if (!disable_net) {
2954 hso_dev = hso_create_net_device(interface,
2955 port_spec);
2956 if (!hso_dev)
2957 goto exit;
2958 tmp_dev = hso_dev;
2959 }
2960 }
2961
2962 if (hso_get_mux_ports(interface, &port_mask))
2963 /* TODO: de-allocate everything */
2964 goto exit;
2965
2966 shared_int = hso_create_shared_int(interface);
2967 if (!shared_int)
2968 goto exit;
2969
2970 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2971 if (port_mask & i) {
2972 hso_dev = hso_create_mux_serial_device(
2973 interface, i, shared_int);
2974 if (!hso_dev)
2975 goto exit;
2976 }
2977 }
2978
2979 if (tmp_dev)
2980 hso_dev = tmp_dev;
2981 break;
2982
2983 case HSO_INTF_BULK:
2984 /* It's a regular bulk interface */
2985 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2986 if (!disable_net)
2987 hso_dev =
2988 hso_create_net_device(interface, port_spec);
2989 } else {
2990 hso_dev =
2991 hso_create_bulk_serial_device(interface, port_spec);
2992 }
2993 if (!hso_dev)
2994 goto exit;
2995 break;
2996 default:
2997 goto exit;
2998 }
2999
3000 /* save our data pointer in this device */
3001 usb_set_intfdata(interface, hso_dev);
3002
3003 /* done */
3004 return 0;
3005 exit:
3006 hso_free_interface(interface);
3007 return -ENODEV;
3008 }
3009
3010 /* device removed, cleaning up */
3011 static void hso_disconnect(struct usb_interface *interface)
3012 {
3013 hso_free_interface(interface);
3014
3015 /* remove reference of our private data */
3016 usb_set_intfdata(interface, NULL);
3017 }
3018
3019 static void async_get_intf(struct work_struct *data)
3020 {
3021 struct hso_device *hso_dev =
3022 container_of(data, struct hso_device, async_get_intf);
3023 usb_autopm_get_interface(hso_dev->interface);
3024 }
3025
3026 static void async_put_intf(struct work_struct *data)
3027 {
3028 struct hso_device *hso_dev =
3029 container_of(data, struct hso_device, async_put_intf);
3030 usb_autopm_put_interface(hso_dev->interface);
3031 }
3032
3033 static int hso_get_activity(struct hso_device *hso_dev)
3034 {
3035 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3036 if (!hso_dev->is_active) {
3037 hso_dev->is_active = 1;
3038 schedule_work(&hso_dev->async_get_intf);
3039 }
3040 }
3041
3042 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3043 return -EAGAIN;
3044
3045 usb_mark_last_busy(hso_dev->usb);
3046
3047 return 0;
3048 }
3049
3050 static int hso_put_activity(struct hso_device *hso_dev)
3051 {
3052 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3053 if (hso_dev->is_active) {
3054 hso_dev->is_active = 0;
3055 schedule_work(&hso_dev->async_put_intf);
3056 return -EAGAIN;
3057 }
3058 }
3059 hso_dev->is_active = 0;
3060 return 0;
3061 }
3062
3063 /* called by kernel when we need to suspend device */
3064 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3065 {
3066 int i, result;
3067
3068 /* Stop all serial ports */
3069 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3070 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3071 result = hso_stop_serial_device(serial_table[i]);
3072 if (result)
3073 goto out;
3074 }
3075 }
3076
3077 /* Stop all network ports */
3078 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3079 if (network_table[i] &&
3080 (network_table[i]->interface == iface)) {
3081 result = hso_stop_net_device(network_table[i]);
3082 if (result)
3083 goto out;
3084 }
3085 }
3086
3087 out:
3088 return 0;
3089 }
3090
3091 /* called by kernel when we need to resume device */
3092 static int hso_resume(struct usb_interface *iface)
3093 {
3094 int i, result = 0;
3095 struct hso_net *hso_net;
3096
3097 /* Start all serial ports */
3098 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3099 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3100 if (dev2ser(serial_table[i])->open_count) {
3101 result =
3102 hso_start_serial_device(serial_table[i], GFP_NOIO);
3103 hso_kick_transmit(dev2ser(serial_table[i]));
3104 if (result)
3105 goto out;
3106 }
3107 }
3108 }
3109
3110 /* Start all network ports */
3111 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3112 if (network_table[i] &&
3113 (network_table[i]->interface == iface)) {
3114 hso_net = dev2net(network_table[i]);
3115 if (hso_net->flags & IFF_UP) {
3116 /* First transmit any lingering data,
3117 then restart the device. */
3118 if (hso_net->skb_tx_buf) {
3119 dev_dbg(&iface->dev,
3120 "Transmitting"
3121 " lingering data\n");
3122 hso_net_start_xmit(hso_net->skb_tx_buf,
3123 hso_net->net);
3124 hso_net->skb_tx_buf = NULL;
3125 }
3126 result = hso_start_net_device(network_table[i]);
3127 if (result)
3128 goto out;
3129 }
3130 }
3131 }
3132
3133 out:
3134 return result;
3135 }
3136
3137 static void reset_device(struct work_struct *data)
3138 {
3139 struct hso_device *hso_dev =
3140 container_of(data, struct hso_device, reset_device);
3141 struct usb_device *usb = hso_dev->usb;
3142 int result;
3143
3144 if (hso_dev->usb_gone) {
3145 D1("No reset during disconnect\n");
3146 } else {
3147 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3148 if (result < 0)
3149 D1("unable to lock device for reset: %d\n", result);
3150 else {
3151 usb_reset_device(usb);
3152 usb_unlock_device(usb);
3153 }
3154 }
3155 }
3156
3157 static void hso_serial_ref_free(struct kref *ref)
3158 {
3159 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3160
3161 hso_free_serial_device(hso_dev);
3162 }
3163
3164 static void hso_free_interface(struct usb_interface *interface)
3165 {
3166 struct hso_serial *hso_dev;
3167 struct tty_struct *tty;
3168 int i;
3169
3170 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3171 if (serial_table[i] &&
3172 (serial_table[i]->interface == interface)) {
3173 hso_dev = dev2ser(serial_table[i]);
3174 spin_lock_irq(&hso_dev->serial_lock);
3175 tty = tty_kref_get(hso_dev->tty);
3176 spin_unlock_irq(&hso_dev->serial_lock);
3177 if (tty)
3178 tty_hangup(tty);
3179 mutex_lock(&hso_dev->parent->mutex);
3180 tty_kref_put(tty);
3181 hso_dev->parent->usb_gone = 1;
3182 mutex_unlock(&hso_dev->parent->mutex);
3183 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3184 }
3185 }
3186
3187 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3188 if (network_table[i] &&
3189 (network_table[i]->interface == interface)) {
3190 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3191 /* hso_stop_net_device doesn't stop the net queue since
3192 * traffic needs to start it again when suspended */
3193 netif_stop_queue(dev2net(network_table[i])->net);
3194 hso_stop_net_device(network_table[i]);
3195 cancel_work_sync(&network_table[i]->async_put_intf);
3196 cancel_work_sync(&network_table[i]->async_get_intf);
3197 if (rfk) {
3198 rfkill_unregister(rfk);
3199 rfkill_destroy(rfk);
3200 }
3201 hso_free_net_device(network_table[i]);
3202 }
3203 }
3204 }
3205
3206 /* Helper functions */
3207
3208 /* Get the endpoint ! */
3209 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3210 int type, int dir)
3211 {
3212 int i;
3213 struct usb_host_interface *iface = intf->cur_altsetting;
3214 struct usb_endpoint_descriptor *endp;
3215
3216 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3217 endp = &iface->endpoint[i].desc;
3218 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3219 (usb_endpoint_type(endp) == type))
3220 return endp;
3221 }
3222
3223 return NULL;
3224 }
3225
3226 /* Get the byte that describes which ports are enabled */
3227 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3228 {
3229 int i;
3230 struct usb_host_interface *iface = intf->cur_altsetting;
3231
3232 if (iface->extralen == 3) {
3233 *ports = iface->extra[2];
3234 return 0;
3235 }
3236
3237 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3238 if (iface->endpoint[i].extralen == 3) {
3239 *ports = iface->endpoint[i].extra[2];
3240 return 0;
3241 }
3242 }
3243
3244 return -1;
3245 }
3246
3247 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3248 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3249 struct usb_device *usb, gfp_t gfp)
3250 {
3251 int result;
3252
3253 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3254 usb_rcvintpipe(usb,
3255 shared_int->intr_endp->bEndpointAddress & 0x7F),
3256 shared_int->shared_intr_buf,
3257 1,
3258 intr_callback, shared_int,
3259 shared_int->intr_endp->bInterval);
3260
3261 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3262 if (result)
3263 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3264 result);
3265
3266 return result;
3267 }
3268
3269 /* operations setup of the serial interface */
3270 static const struct tty_operations hso_serial_ops = {
3271 .open = hso_serial_open,
3272 .close = hso_serial_close,
3273 .write = hso_serial_write,
3274 .write_room = hso_serial_write_room,
3275 .ioctl = hso_serial_ioctl,
3276 .set_termios = hso_serial_set_termios,
3277 .chars_in_buffer = hso_serial_chars_in_buffer,
3278 .tiocmget = hso_serial_tiocmget,
3279 .tiocmset = hso_serial_tiocmset,
3280 .get_icount = hso_get_count,
3281 .unthrottle = hso_unthrottle
3282 };
3283
3284 static struct usb_driver hso_driver = {
3285 .name = driver_name,
3286 .probe = hso_probe,
3287 .disconnect = hso_disconnect,
3288 .id_table = hso_ids,
3289 .suspend = hso_suspend,
3290 .resume = hso_resume,
3291 .reset_resume = hso_resume,
3292 .supports_autosuspend = 1,
3293 };
3294
3295 static int __init hso_init(void)
3296 {
3297 int i;
3298 int result;
3299
3300 /* put it in the log */
3301 printk(KERN_INFO "hso: %s\n", version);
3302
3303 /* Initialise the serial table semaphore and table */
3304 spin_lock_init(&serial_table_lock);
3305 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3306 serial_table[i] = NULL;
3307
3308 /* allocate our driver using the proper amount of supported minors */
3309 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3310 if (!tty_drv)
3311 return -ENOMEM;
3312
3313 /* fill in all needed values */
3314 tty_drv->magic = TTY_DRIVER_MAGIC;
3315 tty_drv->owner = THIS_MODULE;
3316 tty_drv->driver_name = driver_name;
3317 tty_drv->name = tty_filename;
3318
3319 /* if major number is provided as parameter, use that one */
3320 if (tty_major)
3321 tty_drv->major = tty_major;
3322
3323 tty_drv->minor_start = 0;
3324 tty_drv->num = HSO_SERIAL_TTY_MINORS;
3325 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3326 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3327 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3328 tty_drv->init_termios = tty_std_termios;
3329 hso_init_termios(&tty_drv->init_termios);
3330 tty_set_operations(tty_drv, &hso_serial_ops);
3331
3332 /* register the tty driver */
3333 result = tty_register_driver(tty_drv);
3334 if (result) {
3335 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3336 __func__, result);
3337 return result;
3338 }
3339
3340 /* register this module as an usb driver */
3341 result = usb_register(&hso_driver);
3342 if (result) {
3343 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3344 result);
3345 /* cleanup serial interface */
3346 tty_unregister_driver(tty_drv);
3347 return result;
3348 }
3349
3350 /* done */
3351 return 0;
3352 }
3353
3354 static void __exit hso_exit(void)
3355 {
3356 printk(KERN_INFO "hso: unloaded\n");
3357
3358 tty_unregister_driver(tty_drv);
3359 /* deregister the usb driver */
3360 usb_deregister(&hso_driver);
3361 }
3362
3363 /* Module definitions */
3364 module_init(hso_init);
3365 module_exit(hso_exit);
3366
3367 MODULE_AUTHOR(MOD_AUTHOR);
3368 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3369 MODULE_LICENSE(MOD_LICENSE);
3370
3371 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3372 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3373 module_param(debug, int, S_IRUGO | S_IWUSR);
3374
3375 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3376 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3377 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3378
3379 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3380 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3381 module_param(disable_net, int, S_IRUGO | S_IWUSR);