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Merge branch 'for-3.10/drivers' of git://git.kernel.dk/linux-block
[deliverable/linux.git] / drivers / net / usb / hso.c
1 /******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
6 * Filip Aben <f.aben@option.com>
7 * Denis Joseph Barrow <d.barow@option.com>
8 * Jan Dumon <j.dumon@option.com>
9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
10 * <ajb@spheresystems.co.uk>
11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
12 * Copyright (C) 2008 Novell, Inc.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
26 * USA
27 *
28 *
29 *****************************************************************************/
30
31 /******************************************************************************
32 *
33 * Description of the device:
34 *
35 * Interface 0: Contains the IP network interface on the bulk end points.
36 * The multiplexed serial ports are using the interrupt and
37 * control endpoints.
38 * Interrupt contains a bitmap telling which multiplexed
39 * serialport needs servicing.
40 *
41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
42 * port is opened, as this have a huge impact on the network port
43 * throughput.
44 *
45 * Interface 2: Standard modem interface - circuit switched interface, this
46 * can be used to make a standard ppp connection however it
47 * should not be used in conjunction with the IP network interface
48 * enabled for USB performance reasons i.e. if using this set
49 * ideally disable_net=1.
50 *
51 *****************************************************************************/
52
53 #include <linux/sched.h>
54 #include <linux/slab.h>
55 #include <linux/init.h>
56 #include <linux/delay.h>
57 #include <linux/netdevice.h>
58 #include <linux/module.h>
59 #include <linux/ethtool.h>
60 #include <linux/usb.h>
61 #include <linux/timer.h>
62 #include <linux/tty.h>
63 #include <linux/tty_driver.h>
64 #include <linux/tty_flip.h>
65 #include <linux/kmod.h>
66 #include <linux/rfkill.h>
67 #include <linux/ip.h>
68 #include <linux/uaccess.h>
69 #include <linux/usb/cdc.h>
70 #include <net/arp.h>
71 #include <asm/byteorder.h>
72 #include <linux/serial_core.h>
73 #include <linux/serial.h>
74
75
76 #define MOD_AUTHOR "Option Wireless"
77 #define MOD_DESCRIPTION "USB High Speed Option driver"
78 #define MOD_LICENSE "GPL"
79
80 #define HSO_MAX_NET_DEVICES 10
81 #define HSO__MAX_MTU 2048
82 #define DEFAULT_MTU 1500
83 #define DEFAULT_MRU 1500
84
85 #define CTRL_URB_RX_SIZE 1024
86 #define CTRL_URB_TX_SIZE 64
87
88 #define BULK_URB_RX_SIZE 4096
89 #define BULK_URB_TX_SIZE 8192
90
91 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
92 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
93 #define MUX_BULK_RX_BUF_COUNT 4
94 #define USB_TYPE_OPTION_VENDOR 0x20
95
96 /* These definitions are used with the struct hso_net flags element */
97 /* - use *_bit operations on it. (bit indices not values.) */
98 #define HSO_NET_RUNNING 0
99
100 #define HSO_NET_TX_TIMEOUT (HZ*10)
101
102 #define HSO_SERIAL_MAGIC 0x48534f31
103
104 /* Number of ttys to handle */
105 #define HSO_SERIAL_TTY_MINORS 256
106
107 #define MAX_RX_URBS 2
108
109 /*****************************************************************************/
110 /* Debugging functions */
111 /*****************************************************************************/
112 #define D__(lvl_, fmt, arg...) \
113 do { \
114 printk(lvl_ "[%d:%s]: " fmt "\n", \
115 __LINE__, __func__, ## arg); \
116 } while (0)
117
118 #define D_(lvl, args...) \
119 do { \
120 if (lvl & debug) \
121 D__(KERN_INFO, args); \
122 } while (0)
123
124 #define D1(args...) D_(0x01, ##args)
125 #define D2(args...) D_(0x02, ##args)
126 #define D3(args...) D_(0x04, ##args)
127 #define D4(args...) D_(0x08, ##args)
128 #define D5(args...) D_(0x10, ##args)
129
130 /*****************************************************************************/
131 /* Enumerators */
132 /*****************************************************************************/
133 enum pkt_parse_state {
134 WAIT_IP,
135 WAIT_DATA,
136 WAIT_SYNC
137 };
138
139 /*****************************************************************************/
140 /* Structs */
141 /*****************************************************************************/
142
143 struct hso_shared_int {
144 struct usb_endpoint_descriptor *intr_endp;
145 void *shared_intr_buf;
146 struct urb *shared_intr_urb;
147 struct usb_device *usb;
148 int use_count;
149 int ref_count;
150 struct mutex shared_int_lock;
151 };
152
153 struct hso_net {
154 struct hso_device *parent;
155 struct net_device *net;
156 struct rfkill *rfkill;
157
158 struct usb_endpoint_descriptor *in_endp;
159 struct usb_endpoint_descriptor *out_endp;
160
161 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
162 struct urb *mux_bulk_tx_urb;
163 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
164 void *mux_bulk_tx_buf;
165
166 struct sk_buff *skb_rx_buf;
167 struct sk_buff *skb_tx_buf;
168
169 enum pkt_parse_state rx_parse_state;
170 spinlock_t net_lock;
171
172 unsigned short rx_buf_size;
173 unsigned short rx_buf_missing;
174 struct iphdr rx_ip_hdr;
175
176 unsigned long flags;
177 };
178
179 enum rx_ctrl_state{
180 RX_IDLE,
181 RX_SENT,
182 RX_PENDING
183 };
184
185 #define BM_REQUEST_TYPE (0xa1)
186 #define B_NOTIFICATION (0x20)
187 #define W_VALUE (0x0)
188 #define W_INDEX (0x2)
189 #define W_LENGTH (0x2)
190
191 #define B_OVERRUN (0x1<<6)
192 #define B_PARITY (0x1<<5)
193 #define B_FRAMING (0x1<<4)
194 #define B_RING_SIGNAL (0x1<<3)
195 #define B_BREAK (0x1<<2)
196 #define B_TX_CARRIER (0x1<<1)
197 #define B_RX_CARRIER (0x1<<0)
198
199 struct hso_serial_state_notification {
200 u8 bmRequestType;
201 u8 bNotification;
202 u16 wValue;
203 u16 wIndex;
204 u16 wLength;
205 u16 UART_state_bitmap;
206 } __packed;
207
208 struct hso_tiocmget {
209 struct mutex mutex;
210 wait_queue_head_t waitq;
211 int intr_completed;
212 struct usb_endpoint_descriptor *endp;
213 struct urb *urb;
214 struct hso_serial_state_notification serial_state_notification;
215 u16 prev_UART_state_bitmap;
216 struct uart_icount icount;
217 };
218
219
220 struct hso_serial {
221 struct hso_device *parent;
222 int magic;
223 u8 minor;
224
225 struct hso_shared_int *shared_int;
226
227 /* rx/tx urb could be either a bulk urb or a control urb depending
228 on which serial port it is used on. */
229 struct urb *rx_urb[MAX_RX_URBS];
230 u8 num_rx_urbs;
231 u8 *rx_data[MAX_RX_URBS];
232 u16 rx_data_length; /* should contain allocated length */
233
234 struct urb *tx_urb;
235 u8 *tx_data;
236 u8 *tx_buffer;
237 u16 tx_data_length; /* should contain allocated length */
238 u16 tx_data_count;
239 u16 tx_buffer_count;
240 struct usb_ctrlrequest ctrl_req_tx;
241 struct usb_ctrlrequest ctrl_req_rx;
242
243 struct usb_endpoint_descriptor *in_endp;
244 struct usb_endpoint_descriptor *out_endp;
245
246 enum rx_ctrl_state rx_state;
247 u8 rts_state;
248 u8 dtr_state;
249 unsigned tx_urb_used:1;
250
251 struct tty_port port;
252 /* from usb_serial_port */
253 spinlock_t serial_lock;
254
255 int (*write_data) (struct hso_serial *serial);
256 struct hso_tiocmget *tiocmget;
257 /* Hacks required to get flow control
258 * working on the serial receive buffers
259 * so as not to drop characters on the floor.
260 */
261 int curr_rx_urb_idx;
262 u16 curr_rx_urb_offset;
263 u8 rx_urb_filled[MAX_RX_URBS];
264 struct tasklet_struct unthrottle_tasklet;
265 struct work_struct retry_unthrottle_workqueue;
266 };
267
268 struct hso_device {
269 union {
270 struct hso_serial *dev_serial;
271 struct hso_net *dev_net;
272 } port_data;
273
274 u32 port_spec;
275
276 u8 is_active;
277 u8 usb_gone;
278 struct work_struct async_get_intf;
279 struct work_struct async_put_intf;
280 struct work_struct reset_device;
281
282 struct usb_device *usb;
283 struct usb_interface *interface;
284
285 struct device *dev;
286 struct kref ref;
287 struct mutex mutex;
288 };
289
290 /* Type of interface */
291 #define HSO_INTF_MASK 0xFF00
292 #define HSO_INTF_MUX 0x0100
293 #define HSO_INTF_BULK 0x0200
294
295 /* Type of port */
296 #define HSO_PORT_MASK 0xFF
297 #define HSO_PORT_NO_PORT 0x0
298 #define HSO_PORT_CONTROL 0x1
299 #define HSO_PORT_APP 0x2
300 #define HSO_PORT_GPS 0x3
301 #define HSO_PORT_PCSC 0x4
302 #define HSO_PORT_APP2 0x5
303 #define HSO_PORT_GPS_CONTROL 0x6
304 #define HSO_PORT_MSD 0x7
305 #define HSO_PORT_VOICE 0x8
306 #define HSO_PORT_DIAG2 0x9
307 #define HSO_PORT_DIAG 0x10
308 #define HSO_PORT_MODEM 0x11
309 #define HSO_PORT_NETWORK 0x12
310
311 /* Additional device info */
312 #define HSO_INFO_MASK 0xFF000000
313 #define HSO_INFO_CRC_BUG 0x01000000
314
315 /*****************************************************************************/
316 /* Prototypes */
317 /*****************************************************************************/
318 /* Serial driver functions */
319 static int hso_serial_tiocmset(struct tty_struct *tty,
320 unsigned int set, unsigned int clear);
321 static void ctrl_callback(struct urb *urb);
322 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
323 static void hso_kick_transmit(struct hso_serial *serial);
324 /* Helper functions */
325 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
326 struct usb_device *usb, gfp_t gfp);
327 static void handle_usb_error(int status, const char *function,
328 struct hso_device *hso_dev);
329 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
330 int type, int dir);
331 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
332 static void hso_free_interface(struct usb_interface *intf);
333 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
334 static int hso_stop_serial_device(struct hso_device *hso_dev);
335 static int hso_start_net_device(struct hso_device *hso_dev);
336 static void hso_free_shared_int(struct hso_shared_int *shared_int);
337 static int hso_stop_net_device(struct hso_device *hso_dev);
338 static void hso_serial_ref_free(struct kref *ref);
339 static void hso_std_serial_read_bulk_callback(struct urb *urb);
340 static int hso_mux_serial_read(struct hso_serial *serial);
341 static void async_get_intf(struct work_struct *data);
342 static void async_put_intf(struct work_struct *data);
343 static int hso_put_activity(struct hso_device *hso_dev);
344 static int hso_get_activity(struct hso_device *hso_dev);
345 static void tiocmget_intr_callback(struct urb *urb);
346 static void reset_device(struct work_struct *data);
347 /*****************************************************************************/
348 /* Helping functions */
349 /*****************************************************************************/
350
351 /* #define DEBUG */
352
353 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
354 {
355 return hso_dev->port_data.dev_net;
356 }
357
358 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
359 {
360 return hso_dev->port_data.dev_serial;
361 }
362
363 /* Debugging functions */
364 #ifdef DEBUG
365 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
366 unsigned int len)
367 {
368 static char name[255];
369
370 sprintf(name, "hso[%d:%s]", line_count, func_name);
371 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
372 }
373
374 #define DUMP(buf_, len_) \
375 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
376
377 #define DUMP1(buf_, len_) \
378 do { \
379 if (0x01 & debug) \
380 DUMP(buf_, len_); \
381 } while (0)
382 #else
383 #define DUMP(buf_, len_)
384 #define DUMP1(buf_, len_)
385 #endif
386
387 /* module parameters */
388 static int debug;
389 static int tty_major;
390 static int disable_net;
391
392 /* driver info */
393 static const char driver_name[] = "hso";
394 static const char tty_filename[] = "ttyHS";
395 static const char *version = __FILE__ ": " MOD_AUTHOR;
396 /* the usb driver itself (registered in hso_init) */
397 static struct usb_driver hso_driver;
398 /* serial structures */
399 static struct tty_driver *tty_drv;
400 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
401 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
402 static spinlock_t serial_table_lock;
403
404 static const s32 default_port_spec[] = {
405 HSO_INTF_MUX | HSO_PORT_NETWORK,
406 HSO_INTF_BULK | HSO_PORT_DIAG,
407 HSO_INTF_BULK | HSO_PORT_MODEM,
408 0
409 };
410
411 static const s32 icon321_port_spec[] = {
412 HSO_INTF_MUX | HSO_PORT_NETWORK,
413 HSO_INTF_BULK | HSO_PORT_DIAG2,
414 HSO_INTF_BULK | HSO_PORT_MODEM,
415 HSO_INTF_BULK | HSO_PORT_DIAG,
416 0
417 };
418
419 #define default_port_device(vendor, product) \
420 USB_DEVICE(vendor, product), \
421 .driver_info = (kernel_ulong_t)default_port_spec
422
423 #define icon321_port_device(vendor, product) \
424 USB_DEVICE(vendor, product), \
425 .driver_info = (kernel_ulong_t)icon321_port_spec
426
427 /* list of devices we support */
428 static const struct usb_device_id hso_ids[] = {
429 {default_port_device(0x0af0, 0x6711)},
430 {default_port_device(0x0af0, 0x6731)},
431 {default_port_device(0x0af0, 0x6751)},
432 {default_port_device(0x0af0, 0x6771)},
433 {default_port_device(0x0af0, 0x6791)},
434 {default_port_device(0x0af0, 0x6811)},
435 {default_port_device(0x0af0, 0x6911)},
436 {default_port_device(0x0af0, 0x6951)},
437 {default_port_device(0x0af0, 0x6971)},
438 {default_port_device(0x0af0, 0x7011)},
439 {default_port_device(0x0af0, 0x7031)},
440 {default_port_device(0x0af0, 0x7051)},
441 {default_port_device(0x0af0, 0x7071)},
442 {default_port_device(0x0af0, 0x7111)},
443 {default_port_device(0x0af0, 0x7211)},
444 {default_port_device(0x0af0, 0x7251)},
445 {default_port_device(0x0af0, 0x7271)},
446 {default_port_device(0x0af0, 0x7311)},
447 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
448 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
449 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
450 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
451 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
452 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
453 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
454 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
455 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
456 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
457 {USB_DEVICE(0x0af0, 0x7701)},
458 {USB_DEVICE(0x0af0, 0x7706)},
459 {USB_DEVICE(0x0af0, 0x7801)},
460 {USB_DEVICE(0x0af0, 0x7901)},
461 {USB_DEVICE(0x0af0, 0x7A01)},
462 {USB_DEVICE(0x0af0, 0x7A05)},
463 {USB_DEVICE(0x0af0, 0x8200)},
464 {USB_DEVICE(0x0af0, 0x8201)},
465 {USB_DEVICE(0x0af0, 0x8300)},
466 {USB_DEVICE(0x0af0, 0x8302)},
467 {USB_DEVICE(0x0af0, 0x8304)},
468 {USB_DEVICE(0x0af0, 0x8400)},
469 {USB_DEVICE(0x0af0, 0x8600)},
470 {USB_DEVICE(0x0af0, 0x8800)},
471 {USB_DEVICE(0x0af0, 0x8900)},
472 {USB_DEVICE(0x0af0, 0x9000)},
473 {USB_DEVICE(0x0af0, 0xd035)},
474 {USB_DEVICE(0x0af0, 0xd055)},
475 {USB_DEVICE(0x0af0, 0xd155)},
476 {USB_DEVICE(0x0af0, 0xd255)},
477 {USB_DEVICE(0x0af0, 0xd057)},
478 {USB_DEVICE(0x0af0, 0xd157)},
479 {USB_DEVICE(0x0af0, 0xd257)},
480 {USB_DEVICE(0x0af0, 0xd357)},
481 {USB_DEVICE(0x0af0, 0xd058)},
482 {USB_DEVICE(0x0af0, 0xc100)},
483 {}
484 };
485 MODULE_DEVICE_TABLE(usb, hso_ids);
486
487 /* Sysfs attribute */
488 static ssize_t hso_sysfs_show_porttype(struct device *dev,
489 struct device_attribute *attr,
490 char *buf)
491 {
492 struct hso_device *hso_dev = dev_get_drvdata(dev);
493 char *port_name;
494
495 if (!hso_dev)
496 return 0;
497
498 switch (hso_dev->port_spec & HSO_PORT_MASK) {
499 case HSO_PORT_CONTROL:
500 port_name = "Control";
501 break;
502 case HSO_PORT_APP:
503 port_name = "Application";
504 break;
505 case HSO_PORT_APP2:
506 port_name = "Application2";
507 break;
508 case HSO_PORT_GPS:
509 port_name = "GPS";
510 break;
511 case HSO_PORT_GPS_CONTROL:
512 port_name = "GPS Control";
513 break;
514 case HSO_PORT_PCSC:
515 port_name = "PCSC";
516 break;
517 case HSO_PORT_DIAG:
518 port_name = "Diagnostic";
519 break;
520 case HSO_PORT_DIAG2:
521 port_name = "Diagnostic2";
522 break;
523 case HSO_PORT_MODEM:
524 port_name = "Modem";
525 break;
526 case HSO_PORT_NETWORK:
527 port_name = "Network";
528 break;
529 default:
530 port_name = "Unknown";
531 break;
532 }
533
534 return sprintf(buf, "%s\n", port_name);
535 }
536 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
537
538 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
539 {
540 int idx;
541
542 for (idx = 0; idx < serial->num_rx_urbs; idx++)
543 if (serial->rx_urb[idx] == urb)
544 return idx;
545 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
546 return -1;
547 }
548
549 /* converts mux value to a port spec value */
550 static u32 hso_mux_to_port(int mux)
551 {
552 u32 result;
553
554 switch (mux) {
555 case 0x1:
556 result = HSO_PORT_CONTROL;
557 break;
558 case 0x2:
559 result = HSO_PORT_APP;
560 break;
561 case 0x4:
562 result = HSO_PORT_PCSC;
563 break;
564 case 0x8:
565 result = HSO_PORT_GPS;
566 break;
567 case 0x10:
568 result = HSO_PORT_APP2;
569 break;
570 default:
571 result = HSO_PORT_NO_PORT;
572 }
573 return result;
574 }
575
576 /* converts port spec value to a mux value */
577 static u32 hso_port_to_mux(int port)
578 {
579 u32 result;
580
581 switch (port & HSO_PORT_MASK) {
582 case HSO_PORT_CONTROL:
583 result = 0x0;
584 break;
585 case HSO_PORT_APP:
586 result = 0x1;
587 break;
588 case HSO_PORT_PCSC:
589 result = 0x2;
590 break;
591 case HSO_PORT_GPS:
592 result = 0x3;
593 break;
594 case HSO_PORT_APP2:
595 result = 0x4;
596 break;
597 default:
598 result = 0x0;
599 }
600 return result;
601 }
602
603 static struct hso_serial *get_serial_by_shared_int_and_type(
604 struct hso_shared_int *shared_int,
605 int mux)
606 {
607 int i, port;
608
609 port = hso_mux_to_port(mux);
610
611 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
612 if (serial_table[i] &&
613 (dev2ser(serial_table[i])->shared_int == shared_int) &&
614 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
615 return dev2ser(serial_table[i]);
616 }
617 }
618
619 return NULL;
620 }
621
622 static struct hso_serial *get_serial_by_index(unsigned index)
623 {
624 struct hso_serial *serial = NULL;
625 unsigned long flags;
626
627 spin_lock_irqsave(&serial_table_lock, flags);
628 if (serial_table[index])
629 serial = dev2ser(serial_table[index]);
630 spin_unlock_irqrestore(&serial_table_lock, flags);
631
632 return serial;
633 }
634
635 static int get_free_serial_index(void)
636 {
637 int index;
638 unsigned long flags;
639
640 spin_lock_irqsave(&serial_table_lock, flags);
641 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
642 if (serial_table[index] == NULL) {
643 spin_unlock_irqrestore(&serial_table_lock, flags);
644 return index;
645 }
646 }
647 spin_unlock_irqrestore(&serial_table_lock, flags);
648
649 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
650 return -1;
651 }
652
653 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
654 {
655 unsigned long flags;
656
657 spin_lock_irqsave(&serial_table_lock, flags);
658 if (serial)
659 serial_table[index] = serial->parent;
660 else
661 serial_table[index] = NULL;
662 spin_unlock_irqrestore(&serial_table_lock, flags);
663 }
664
665 static void handle_usb_error(int status, const char *function,
666 struct hso_device *hso_dev)
667 {
668 char *explanation;
669
670 switch (status) {
671 case -ENODEV:
672 explanation = "no device";
673 break;
674 case -ENOENT:
675 explanation = "endpoint not enabled";
676 break;
677 case -EPIPE:
678 explanation = "endpoint stalled";
679 break;
680 case -ENOSPC:
681 explanation = "not enough bandwidth";
682 break;
683 case -ESHUTDOWN:
684 explanation = "device disabled";
685 break;
686 case -EHOSTUNREACH:
687 explanation = "device suspended";
688 break;
689 case -EINVAL:
690 case -EAGAIN:
691 case -EFBIG:
692 case -EMSGSIZE:
693 explanation = "internal error";
694 break;
695 case -EILSEQ:
696 case -EPROTO:
697 case -ETIME:
698 case -ETIMEDOUT:
699 explanation = "protocol error";
700 if (hso_dev)
701 schedule_work(&hso_dev->reset_device);
702 break;
703 default:
704 explanation = "unknown status";
705 break;
706 }
707
708 /* log a meaningful explanation of an USB status */
709 D1("%s: received USB status - %s (%d)", function, explanation, status);
710 }
711
712 /* Network interface functions */
713
714 /* called when net interface is brought up by ifconfig */
715 static int hso_net_open(struct net_device *net)
716 {
717 struct hso_net *odev = netdev_priv(net);
718 unsigned long flags = 0;
719
720 if (!odev) {
721 dev_err(&net->dev, "No net device !\n");
722 return -ENODEV;
723 }
724
725 odev->skb_tx_buf = NULL;
726
727 /* setup environment */
728 spin_lock_irqsave(&odev->net_lock, flags);
729 odev->rx_parse_state = WAIT_IP;
730 odev->rx_buf_size = 0;
731 odev->rx_buf_missing = sizeof(struct iphdr);
732 spin_unlock_irqrestore(&odev->net_lock, flags);
733
734 /* We are up and running. */
735 set_bit(HSO_NET_RUNNING, &odev->flags);
736 hso_start_net_device(odev->parent);
737
738 /* Tell the kernel we are ready to start receiving from it */
739 netif_start_queue(net);
740
741 return 0;
742 }
743
744 /* called when interface is brought down by ifconfig */
745 static int hso_net_close(struct net_device *net)
746 {
747 struct hso_net *odev = netdev_priv(net);
748
749 /* we don't need the queue anymore */
750 netif_stop_queue(net);
751 /* no longer running */
752 clear_bit(HSO_NET_RUNNING, &odev->flags);
753
754 hso_stop_net_device(odev->parent);
755
756 /* done */
757 return 0;
758 }
759
760 /* USB tells is xmit done, we should start the netqueue again */
761 static void write_bulk_callback(struct urb *urb)
762 {
763 struct hso_net *odev = urb->context;
764 int status = urb->status;
765
766 /* Sanity check */
767 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
768 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
769 return;
770 }
771
772 /* Do we still have a valid kernel network device? */
773 if (!netif_device_present(odev->net)) {
774 dev_err(&urb->dev->dev, "%s: net device not present\n",
775 __func__);
776 return;
777 }
778
779 /* log status, but don't act on it, we don't need to resubmit anything
780 * anyhow */
781 if (status)
782 handle_usb_error(status, __func__, odev->parent);
783
784 hso_put_activity(odev->parent);
785
786 /* Tell the network interface we are ready for another frame */
787 netif_wake_queue(odev->net);
788 }
789
790 /* called by kernel when we need to transmit a packet */
791 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
792 struct net_device *net)
793 {
794 struct hso_net *odev = netdev_priv(net);
795 int result;
796
797 /* Tell the kernel, "No more frames 'til we are done with this one." */
798 netif_stop_queue(net);
799 if (hso_get_activity(odev->parent) == -EAGAIN) {
800 odev->skb_tx_buf = skb;
801 return NETDEV_TX_OK;
802 }
803
804 /* log if asked */
805 DUMP1(skb->data, skb->len);
806 /* Copy it from kernel memory to OUR memory */
807 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
808 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
809
810 /* Fill in the URB for shipping it out. */
811 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
812 odev->parent->usb,
813 usb_sndbulkpipe(odev->parent->usb,
814 odev->out_endp->
815 bEndpointAddress & 0x7F),
816 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
817 odev);
818
819 /* Deal with the Zero Length packet problem, I hope */
820 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
821
822 /* Send the URB on its merry way. */
823 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
824 if (result) {
825 dev_warn(&odev->parent->interface->dev,
826 "failed mux_bulk_tx_urb %d\n", result);
827 net->stats.tx_errors++;
828 netif_start_queue(net);
829 } else {
830 net->stats.tx_packets++;
831 net->stats.tx_bytes += skb->len;
832 }
833 dev_kfree_skb(skb);
834 /* we're done */
835 return NETDEV_TX_OK;
836 }
837
838 static const struct ethtool_ops ops = {
839 .get_link = ethtool_op_get_link
840 };
841
842 /* called when a packet did not ack after watchdogtimeout */
843 static void hso_net_tx_timeout(struct net_device *net)
844 {
845 struct hso_net *odev = netdev_priv(net);
846
847 if (!odev)
848 return;
849
850 /* Tell syslog we are hosed. */
851 dev_warn(&net->dev, "Tx timed out.\n");
852
853 /* Tear the waiting frame off the list */
854 if (odev->mux_bulk_tx_urb &&
855 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
856 usb_unlink_urb(odev->mux_bulk_tx_urb);
857
858 /* Update statistics */
859 net->stats.tx_errors++;
860 }
861
862 /* make a real packet from the received USB buffer */
863 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
864 unsigned int count, unsigned char is_eop)
865 {
866 unsigned short temp_bytes;
867 unsigned short buffer_offset = 0;
868 unsigned short frame_len;
869 unsigned char *tmp_rx_buf;
870
871 /* log if needed */
872 D1("Rx %d bytes", count);
873 DUMP(ip_pkt, min(128, (int)count));
874
875 while (count) {
876 switch (odev->rx_parse_state) {
877 case WAIT_IP:
878 /* waiting for IP header. */
879 /* wanted bytes - size of ip header */
880 temp_bytes =
881 (count <
882 odev->rx_buf_missing) ? count : odev->
883 rx_buf_missing;
884
885 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
886 odev->rx_buf_size, ip_pkt + buffer_offset,
887 temp_bytes);
888
889 odev->rx_buf_size += temp_bytes;
890 buffer_offset += temp_bytes;
891 odev->rx_buf_missing -= temp_bytes;
892 count -= temp_bytes;
893
894 if (!odev->rx_buf_missing) {
895 /* header is complete allocate an sk_buffer and
896 * continue to WAIT_DATA */
897 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
898
899 if ((frame_len > DEFAULT_MRU) ||
900 (frame_len < sizeof(struct iphdr))) {
901 dev_err(&odev->net->dev,
902 "Invalid frame (%d) length\n",
903 frame_len);
904 odev->rx_parse_state = WAIT_SYNC;
905 continue;
906 }
907 /* Allocate an sk_buff */
908 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
909 frame_len);
910 if (!odev->skb_rx_buf) {
911 /* We got no receive buffer. */
912 D1("could not allocate memory");
913 odev->rx_parse_state = WAIT_SYNC;
914 return;
915 }
916
917 /* Copy what we got so far. make room for iphdr
918 * after tail. */
919 tmp_rx_buf =
920 skb_put(odev->skb_rx_buf,
921 sizeof(struct iphdr));
922 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
923 sizeof(struct iphdr));
924
925 /* ETH_HLEN */
926 odev->rx_buf_size = sizeof(struct iphdr);
927
928 /* Filip actually use .tot_len */
929 odev->rx_buf_missing =
930 frame_len - sizeof(struct iphdr);
931 odev->rx_parse_state = WAIT_DATA;
932 }
933 break;
934
935 case WAIT_DATA:
936 temp_bytes = (count < odev->rx_buf_missing)
937 ? count : odev->rx_buf_missing;
938
939 /* Copy the rest of the bytes that are left in the
940 * buffer into the waiting sk_buf. */
941 /* Make room for temp_bytes after tail. */
942 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
943 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
944
945 odev->rx_buf_missing -= temp_bytes;
946 count -= temp_bytes;
947 buffer_offset += temp_bytes;
948 odev->rx_buf_size += temp_bytes;
949 if (!odev->rx_buf_missing) {
950 /* Packet is complete. Inject into stack. */
951 /* We have IP packet here */
952 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
953 skb_reset_mac_header(odev->skb_rx_buf);
954
955 /* Ship it off to the kernel */
956 netif_rx(odev->skb_rx_buf);
957 /* No longer our buffer. */
958 odev->skb_rx_buf = NULL;
959
960 /* update out statistics */
961 odev->net->stats.rx_packets++;
962
963 odev->net->stats.rx_bytes += odev->rx_buf_size;
964
965 odev->rx_buf_size = 0;
966 odev->rx_buf_missing = sizeof(struct iphdr);
967 odev->rx_parse_state = WAIT_IP;
968 }
969 break;
970
971 case WAIT_SYNC:
972 D1(" W_S");
973 count = 0;
974 break;
975 default:
976 D1(" ");
977 count--;
978 break;
979 }
980 }
981
982 /* Recovery mechanism for WAIT_SYNC state. */
983 if (is_eop) {
984 if (odev->rx_parse_state == WAIT_SYNC) {
985 odev->rx_parse_state = WAIT_IP;
986 odev->rx_buf_size = 0;
987 odev->rx_buf_missing = sizeof(struct iphdr);
988 }
989 }
990 }
991
992 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
993 {
994 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
995 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
996
997 if (((rest == 5) || (rest == 6)) &&
998 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
999 crc_check, 4)) {
1000 urb->actual_length -= 4;
1001 }
1002 }
1003
1004 /* Moving data from usb to kernel (in interrupt state) */
1005 static void read_bulk_callback(struct urb *urb)
1006 {
1007 struct hso_net *odev = urb->context;
1008 struct net_device *net;
1009 int result;
1010 int status = urb->status;
1011
1012 /* is al ok? (Filip: Who's Al ?) */
1013 if (status) {
1014 handle_usb_error(status, __func__, odev->parent);
1015 return;
1016 }
1017
1018 /* Sanity check */
1019 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1020 D1("BULK IN callback but driver is not active!");
1021 return;
1022 }
1023 usb_mark_last_busy(urb->dev);
1024
1025 net = odev->net;
1026
1027 if (!netif_device_present(net)) {
1028 /* Somebody killed our network interface... */
1029 return;
1030 }
1031
1032 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1033 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1034
1035 /* do we even have a packet? */
1036 if (urb->actual_length) {
1037 /* Handle the IP stream, add header and push it onto network
1038 * stack if the packet is complete. */
1039 spin_lock(&odev->net_lock);
1040 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1041 (urb->transfer_buffer_length >
1042 urb->actual_length) ? 1 : 0);
1043 spin_unlock(&odev->net_lock);
1044 }
1045
1046 /* We are done with this URB, resubmit it. Prep the USB to wait for
1047 * another frame. Reuse same as received. */
1048 usb_fill_bulk_urb(urb,
1049 odev->parent->usb,
1050 usb_rcvbulkpipe(odev->parent->usb,
1051 odev->in_endp->
1052 bEndpointAddress & 0x7F),
1053 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1054 read_bulk_callback, odev);
1055
1056 /* Give this to the USB subsystem so it can tell us when more data
1057 * arrives. */
1058 result = usb_submit_urb(urb, GFP_ATOMIC);
1059 if (result)
1060 dev_warn(&odev->parent->interface->dev,
1061 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1062 result);
1063 }
1064
1065 /* Serial driver functions */
1066
1067 static void hso_init_termios(struct ktermios *termios)
1068 {
1069 /*
1070 * The default requirements for this device are:
1071 */
1072 termios->c_iflag &=
1073 ~(IGNBRK /* disable ignore break */
1074 | BRKINT /* disable break causes interrupt */
1075 | PARMRK /* disable mark parity errors */
1076 | ISTRIP /* disable clear high bit of input characters */
1077 | INLCR /* disable translate NL to CR */
1078 | IGNCR /* disable ignore CR */
1079 | ICRNL /* disable translate CR to NL */
1080 | IXON); /* disable enable XON/XOFF flow control */
1081
1082 /* disable postprocess output characters */
1083 termios->c_oflag &= ~OPOST;
1084
1085 termios->c_lflag &=
1086 ~(ECHO /* disable echo input characters */
1087 | ECHONL /* disable echo new line */
1088 | ICANON /* disable erase, kill, werase, and rprnt
1089 special characters */
1090 | ISIG /* disable interrupt, quit, and suspend special
1091 characters */
1092 | IEXTEN); /* disable non-POSIX special characters */
1093
1094 termios->c_cflag &=
1095 ~(CSIZE /* no size */
1096 | PARENB /* disable parity bit */
1097 | CBAUD /* clear current baud rate */
1098 | CBAUDEX); /* clear current buad rate */
1099
1100 termios->c_cflag |= CS8; /* character size 8 bits */
1101
1102 /* baud rate 115200 */
1103 tty_termios_encode_baud_rate(termios, 115200, 115200);
1104 }
1105
1106 static void _hso_serial_set_termios(struct tty_struct *tty,
1107 struct ktermios *old)
1108 {
1109 struct hso_serial *serial = tty->driver_data;
1110
1111 if (!serial) {
1112 printk(KERN_ERR "%s: no tty structures", __func__);
1113 return;
1114 }
1115
1116 D4("port %d", serial->minor);
1117
1118 /*
1119 * Fix up unsupported bits
1120 */
1121 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1122
1123 tty->termios.c_cflag &=
1124 ~(CSIZE /* no size */
1125 | PARENB /* disable parity bit */
1126 | CBAUD /* clear current baud rate */
1127 | CBAUDEX); /* clear current buad rate */
1128
1129 tty->termios.c_cflag |= CS8; /* character size 8 bits */
1130
1131 /* baud rate 115200 */
1132 tty_encode_baud_rate(tty, 115200, 115200);
1133 }
1134
1135 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1136 {
1137 int result;
1138 /* We are done with this URB, resubmit it. Prep the USB to wait for
1139 * another frame */
1140 usb_fill_bulk_urb(urb, serial->parent->usb,
1141 usb_rcvbulkpipe(serial->parent->usb,
1142 serial->in_endp->
1143 bEndpointAddress & 0x7F),
1144 urb->transfer_buffer, serial->rx_data_length,
1145 hso_std_serial_read_bulk_callback, serial);
1146 /* Give this to the USB subsystem so it can tell us when more data
1147 * arrives. */
1148 result = usb_submit_urb(urb, GFP_ATOMIC);
1149 if (result) {
1150 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1151 __func__, result);
1152 }
1153 }
1154
1155
1156
1157
1158 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1159 {
1160 int count;
1161 struct urb *curr_urb;
1162
1163 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1164 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1165 count = put_rxbuf_data(curr_urb, serial);
1166 if (count == -1)
1167 return;
1168 if (count == 0) {
1169 serial->curr_rx_urb_idx++;
1170 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1171 serial->curr_rx_urb_idx = 0;
1172 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1173 }
1174 }
1175 }
1176
1177 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1178 {
1179 int count = 0;
1180 struct urb *urb;
1181
1182 urb = serial->rx_urb[0];
1183 if (serial->port.count > 0) {
1184 count = put_rxbuf_data(urb, serial);
1185 if (count == -1)
1186 return;
1187 }
1188 /* Re issue a read as long as we receive data. */
1189
1190 if (count == 0 && ((urb->actual_length != 0) ||
1191 (serial->rx_state == RX_PENDING))) {
1192 serial->rx_state = RX_SENT;
1193 hso_mux_serial_read(serial);
1194 } else
1195 serial->rx_state = RX_IDLE;
1196 }
1197
1198
1199 /* read callback for Diag and CS port */
1200 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1201 {
1202 struct hso_serial *serial = urb->context;
1203 int status = urb->status;
1204
1205 /* sanity check */
1206 if (!serial) {
1207 D1("serial == NULL");
1208 return;
1209 } else if (status) {
1210 handle_usb_error(status, __func__, serial->parent);
1211 return;
1212 }
1213
1214 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1215 D1("Actual length = %d\n", urb->actual_length);
1216 DUMP1(urb->transfer_buffer, urb->actual_length);
1217
1218 /* Anyone listening? */
1219 if (serial->port.count == 0)
1220 return;
1221
1222 if (status == 0) {
1223 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1224 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1225 /* Valid data, handle RX data */
1226 spin_lock(&serial->serial_lock);
1227 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1228 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1229 spin_unlock(&serial->serial_lock);
1230 } else if (status == -ENOENT || status == -ECONNRESET) {
1231 /* Unlinked - check for throttled port. */
1232 D2("Port %d, successfully unlinked urb", serial->minor);
1233 spin_lock(&serial->serial_lock);
1234 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1235 hso_resubmit_rx_bulk_urb(serial, urb);
1236 spin_unlock(&serial->serial_lock);
1237 } else {
1238 D2("Port %d, status = %d for read urb", serial->minor, status);
1239 return;
1240 }
1241 }
1242
1243 /*
1244 * This needs to be a tasklet otherwise we will
1245 * end up recursively calling this function.
1246 */
1247 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1248 {
1249 unsigned long flags;
1250
1251 spin_lock_irqsave(&serial->serial_lock, flags);
1252 if ((serial->parent->port_spec & HSO_INTF_MUX))
1253 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1254 else
1255 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1256 spin_unlock_irqrestore(&serial->serial_lock, flags);
1257 }
1258
1259 static void hso_unthrottle(struct tty_struct *tty)
1260 {
1261 struct hso_serial *serial = tty->driver_data;
1262
1263 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1264 }
1265
1266 static void hso_unthrottle_workfunc(struct work_struct *work)
1267 {
1268 struct hso_serial *serial =
1269 container_of(work, struct hso_serial,
1270 retry_unthrottle_workqueue);
1271 hso_unthrottle_tasklet(serial);
1272 }
1273
1274 /* open the requested serial port */
1275 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1276 {
1277 struct hso_serial *serial = get_serial_by_index(tty->index);
1278 int result;
1279
1280 /* sanity check */
1281 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1282 WARN_ON(1);
1283 tty->driver_data = NULL;
1284 D1("Failed to open port");
1285 return -ENODEV;
1286 }
1287
1288 mutex_lock(&serial->parent->mutex);
1289 result = usb_autopm_get_interface(serial->parent->interface);
1290 if (result < 0)
1291 goto err_out;
1292
1293 D1("Opening %d", serial->minor);
1294 kref_get(&serial->parent->ref);
1295
1296 /* setup */
1297 tty->driver_data = serial;
1298 tty_port_tty_set(&serial->port, tty);
1299
1300 /* check for port already opened, if not set the termios */
1301 serial->port.count++;
1302 if (serial->port.count == 1) {
1303 serial->rx_state = RX_IDLE;
1304 /* Force default termio settings */
1305 _hso_serial_set_termios(tty, NULL);
1306 tasklet_init(&serial->unthrottle_tasklet,
1307 (void (*)(unsigned long))hso_unthrottle_tasklet,
1308 (unsigned long)serial);
1309 INIT_WORK(&serial->retry_unthrottle_workqueue,
1310 hso_unthrottle_workfunc);
1311 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1312 if (result) {
1313 hso_stop_serial_device(serial->parent);
1314 serial->port.count--;
1315 kref_put(&serial->parent->ref, hso_serial_ref_free);
1316 }
1317 } else {
1318 D1("Port was already open");
1319 }
1320
1321 usb_autopm_put_interface(serial->parent->interface);
1322
1323 /* done */
1324 if (result)
1325 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1326 err_out:
1327 mutex_unlock(&serial->parent->mutex);
1328 return result;
1329 }
1330
1331 /* close the requested serial port */
1332 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1333 {
1334 struct hso_serial *serial = tty->driver_data;
1335 u8 usb_gone;
1336
1337 D1("Closing serial port");
1338
1339 /* Open failed, no close cleanup required */
1340 if (serial == NULL)
1341 return;
1342
1343 mutex_lock(&serial->parent->mutex);
1344 usb_gone = serial->parent->usb_gone;
1345
1346 if (!usb_gone)
1347 usb_autopm_get_interface(serial->parent->interface);
1348
1349 /* reset the rts and dtr */
1350 /* do the actual close */
1351 serial->port.count--;
1352
1353 if (serial->port.count <= 0) {
1354 serial->port.count = 0;
1355 tty_port_tty_set(&serial->port, NULL);
1356 if (!usb_gone)
1357 hso_stop_serial_device(serial->parent);
1358 tasklet_kill(&serial->unthrottle_tasklet);
1359 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1360 }
1361
1362 if (!usb_gone)
1363 usb_autopm_put_interface(serial->parent->interface);
1364
1365 mutex_unlock(&serial->parent->mutex);
1366
1367 kref_put(&serial->parent->ref, hso_serial_ref_free);
1368 }
1369
1370 /* close the requested serial port */
1371 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1372 int count)
1373 {
1374 struct hso_serial *serial = tty->driver_data;
1375 int space, tx_bytes;
1376 unsigned long flags;
1377
1378 /* sanity check */
1379 if (serial == NULL) {
1380 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1381 return -ENODEV;
1382 }
1383
1384 spin_lock_irqsave(&serial->serial_lock, flags);
1385
1386 space = serial->tx_data_length - serial->tx_buffer_count;
1387 tx_bytes = (count < space) ? count : space;
1388
1389 if (!tx_bytes)
1390 goto out;
1391
1392 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1393 serial->tx_buffer_count += tx_bytes;
1394
1395 out:
1396 spin_unlock_irqrestore(&serial->serial_lock, flags);
1397
1398 hso_kick_transmit(serial);
1399 /* done */
1400 return tx_bytes;
1401 }
1402
1403 /* how much room is there for writing */
1404 static int hso_serial_write_room(struct tty_struct *tty)
1405 {
1406 struct hso_serial *serial = tty->driver_data;
1407 int room;
1408 unsigned long flags;
1409
1410 spin_lock_irqsave(&serial->serial_lock, flags);
1411 room = serial->tx_data_length - serial->tx_buffer_count;
1412 spin_unlock_irqrestore(&serial->serial_lock, flags);
1413
1414 /* return free room */
1415 return room;
1416 }
1417
1418 /* setup the term */
1419 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1420 {
1421 struct hso_serial *serial = tty->driver_data;
1422 unsigned long flags;
1423
1424 if (old)
1425 D5("Termios called with: cflags new[%d] - old[%d]",
1426 tty->termios.c_cflag, old->c_cflag);
1427
1428 /* the actual setup */
1429 spin_lock_irqsave(&serial->serial_lock, flags);
1430 if (serial->port.count)
1431 _hso_serial_set_termios(tty, old);
1432 else
1433 tty->termios = *old;
1434 spin_unlock_irqrestore(&serial->serial_lock, flags);
1435
1436 /* done */
1437 }
1438
1439 /* how many characters in the buffer */
1440 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1441 {
1442 struct hso_serial *serial = tty->driver_data;
1443 int chars;
1444 unsigned long flags;
1445
1446 /* sanity check */
1447 if (serial == NULL)
1448 return 0;
1449
1450 spin_lock_irqsave(&serial->serial_lock, flags);
1451 chars = serial->tx_buffer_count;
1452 spin_unlock_irqrestore(&serial->serial_lock, flags);
1453
1454 return chars;
1455 }
1456 static int tiocmget_submit_urb(struct hso_serial *serial,
1457 struct hso_tiocmget *tiocmget,
1458 struct usb_device *usb)
1459 {
1460 int result;
1461
1462 if (serial->parent->usb_gone)
1463 return -ENODEV;
1464 usb_fill_int_urb(tiocmget->urb, usb,
1465 usb_rcvintpipe(usb,
1466 tiocmget->endp->
1467 bEndpointAddress & 0x7F),
1468 &tiocmget->serial_state_notification,
1469 sizeof(struct hso_serial_state_notification),
1470 tiocmget_intr_callback, serial,
1471 tiocmget->endp->bInterval);
1472 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1473 if (result) {
1474 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1475 result);
1476 }
1477 return result;
1478
1479 }
1480
1481 static void tiocmget_intr_callback(struct urb *urb)
1482 {
1483 struct hso_serial *serial = urb->context;
1484 struct hso_tiocmget *tiocmget;
1485 int status = urb->status;
1486 u16 UART_state_bitmap, prev_UART_state_bitmap;
1487 struct uart_icount *icount;
1488 struct hso_serial_state_notification *serial_state_notification;
1489 struct usb_device *usb;
1490
1491 /* Sanity checks */
1492 if (!serial)
1493 return;
1494 if (status) {
1495 handle_usb_error(status, __func__, serial->parent);
1496 return;
1497 }
1498 tiocmget = serial->tiocmget;
1499 if (!tiocmget)
1500 return;
1501 usb = serial->parent->usb;
1502 serial_state_notification = &tiocmget->serial_state_notification;
1503 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1504 serial_state_notification->bNotification != B_NOTIFICATION ||
1505 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1506 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1507 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1508 dev_warn(&usb->dev,
1509 "hso received invalid serial state notification\n");
1510 DUMP(serial_state_notification,
1511 sizeof(struct hso_serial_state_notification));
1512 } else {
1513
1514 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1515 UART_state_bitmap);
1516 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1517 icount = &tiocmget->icount;
1518 spin_lock(&serial->serial_lock);
1519 if ((UART_state_bitmap & B_OVERRUN) !=
1520 (prev_UART_state_bitmap & B_OVERRUN))
1521 icount->parity++;
1522 if ((UART_state_bitmap & B_PARITY) !=
1523 (prev_UART_state_bitmap & B_PARITY))
1524 icount->parity++;
1525 if ((UART_state_bitmap & B_FRAMING) !=
1526 (prev_UART_state_bitmap & B_FRAMING))
1527 icount->frame++;
1528 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1529 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1530 icount->rng++;
1531 if ((UART_state_bitmap & B_BREAK) !=
1532 (prev_UART_state_bitmap & B_BREAK))
1533 icount->brk++;
1534 if ((UART_state_bitmap & B_TX_CARRIER) !=
1535 (prev_UART_state_bitmap & B_TX_CARRIER))
1536 icount->dsr++;
1537 if ((UART_state_bitmap & B_RX_CARRIER) !=
1538 (prev_UART_state_bitmap & B_RX_CARRIER))
1539 icount->dcd++;
1540 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1541 spin_unlock(&serial->serial_lock);
1542 tiocmget->intr_completed = 1;
1543 wake_up_interruptible(&tiocmget->waitq);
1544 }
1545 memset(serial_state_notification, 0,
1546 sizeof(struct hso_serial_state_notification));
1547 tiocmget_submit_urb(serial,
1548 tiocmget,
1549 serial->parent->usb);
1550 }
1551
1552 /*
1553 * next few functions largely stolen from drivers/serial/serial_core.c
1554 */
1555 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1556 * - mask passed in arg for lines of interest
1557 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1558 * Caller should use TIOCGICOUNT to see which one it was
1559 */
1560 static int
1561 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1562 {
1563 DECLARE_WAITQUEUE(wait, current);
1564 struct uart_icount cprev, cnow;
1565 struct hso_tiocmget *tiocmget;
1566 int ret;
1567
1568 tiocmget = serial->tiocmget;
1569 if (!tiocmget)
1570 return -ENOENT;
1571 /*
1572 * note the counters on entry
1573 */
1574 spin_lock_irq(&serial->serial_lock);
1575 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1576 spin_unlock_irq(&serial->serial_lock);
1577 add_wait_queue(&tiocmget->waitq, &wait);
1578 for (;;) {
1579 spin_lock_irq(&serial->serial_lock);
1580 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1581 spin_unlock_irq(&serial->serial_lock);
1582 set_current_state(TASK_INTERRUPTIBLE);
1583 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1584 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1585 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1586 ret = 0;
1587 break;
1588 }
1589 schedule();
1590 /* see if a signal did it */
1591 if (signal_pending(current)) {
1592 ret = -ERESTARTSYS;
1593 break;
1594 }
1595 cprev = cnow;
1596 }
1597 current->state = TASK_RUNNING;
1598 remove_wait_queue(&tiocmget->waitq, &wait);
1599
1600 return ret;
1601 }
1602
1603 /*
1604 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1605 * Return: write counters to the user passed counter struct
1606 * NB: both 1->0 and 0->1 transitions are counted except for
1607 * RI where only 0->1 is counted.
1608 */
1609 static int hso_get_count(struct tty_struct *tty,
1610 struct serial_icounter_struct *icount)
1611 {
1612 struct uart_icount cnow;
1613 struct hso_serial *serial = tty->driver_data;
1614 struct hso_tiocmget *tiocmget = serial->tiocmget;
1615
1616 memset(icount, 0, sizeof(struct serial_icounter_struct));
1617
1618 if (!tiocmget)
1619 return -ENOENT;
1620 spin_lock_irq(&serial->serial_lock);
1621 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1622 spin_unlock_irq(&serial->serial_lock);
1623
1624 icount->cts = cnow.cts;
1625 icount->dsr = cnow.dsr;
1626 icount->rng = cnow.rng;
1627 icount->dcd = cnow.dcd;
1628 icount->rx = cnow.rx;
1629 icount->tx = cnow.tx;
1630 icount->frame = cnow.frame;
1631 icount->overrun = cnow.overrun;
1632 icount->parity = cnow.parity;
1633 icount->brk = cnow.brk;
1634 icount->buf_overrun = cnow.buf_overrun;
1635
1636 return 0;
1637 }
1638
1639
1640 static int hso_serial_tiocmget(struct tty_struct *tty)
1641 {
1642 int retval;
1643 struct hso_serial *serial = tty->driver_data;
1644 struct hso_tiocmget *tiocmget;
1645 u16 UART_state_bitmap;
1646
1647 /* sanity check */
1648 if (!serial) {
1649 D1("no tty structures");
1650 return -EINVAL;
1651 }
1652 spin_lock_irq(&serial->serial_lock);
1653 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1654 ((serial->dtr_state) ? TIOCM_DTR : 0);
1655 tiocmget = serial->tiocmget;
1656 if (tiocmget) {
1657
1658 UART_state_bitmap = le16_to_cpu(
1659 tiocmget->prev_UART_state_bitmap);
1660 if (UART_state_bitmap & B_RING_SIGNAL)
1661 retval |= TIOCM_RNG;
1662 if (UART_state_bitmap & B_RX_CARRIER)
1663 retval |= TIOCM_CD;
1664 if (UART_state_bitmap & B_TX_CARRIER)
1665 retval |= TIOCM_DSR;
1666 }
1667 spin_unlock_irq(&serial->serial_lock);
1668 return retval;
1669 }
1670
1671 static int hso_serial_tiocmset(struct tty_struct *tty,
1672 unsigned int set, unsigned int clear)
1673 {
1674 int val = 0;
1675 unsigned long flags;
1676 int if_num;
1677 struct hso_serial *serial = tty->driver_data;
1678
1679 /* sanity check */
1680 if (!serial) {
1681 D1("no tty structures");
1682 return -EINVAL;
1683 }
1684
1685 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1686 return -EINVAL;
1687
1688 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1689
1690 spin_lock_irqsave(&serial->serial_lock, flags);
1691 if (set & TIOCM_RTS)
1692 serial->rts_state = 1;
1693 if (set & TIOCM_DTR)
1694 serial->dtr_state = 1;
1695
1696 if (clear & TIOCM_RTS)
1697 serial->rts_state = 0;
1698 if (clear & TIOCM_DTR)
1699 serial->dtr_state = 0;
1700
1701 if (serial->dtr_state)
1702 val |= 0x01;
1703 if (serial->rts_state)
1704 val |= 0x02;
1705
1706 spin_unlock_irqrestore(&serial->serial_lock, flags);
1707
1708 return usb_control_msg(serial->parent->usb,
1709 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1710 0x21, val, if_num, NULL, 0,
1711 USB_CTRL_SET_TIMEOUT);
1712 }
1713
1714 static int hso_serial_ioctl(struct tty_struct *tty,
1715 unsigned int cmd, unsigned long arg)
1716 {
1717 struct hso_serial *serial = tty->driver_data;
1718 int ret = 0;
1719 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1720
1721 if (!serial)
1722 return -ENODEV;
1723 switch (cmd) {
1724 case TIOCMIWAIT:
1725 ret = hso_wait_modem_status(serial, arg);
1726 break;
1727 default:
1728 ret = -ENOIOCTLCMD;
1729 break;
1730 }
1731 return ret;
1732 }
1733
1734
1735 /* starts a transmit */
1736 static void hso_kick_transmit(struct hso_serial *serial)
1737 {
1738 u8 *temp;
1739 unsigned long flags;
1740 int res;
1741
1742 spin_lock_irqsave(&serial->serial_lock, flags);
1743 if (!serial->tx_buffer_count)
1744 goto out;
1745
1746 if (serial->tx_urb_used)
1747 goto out;
1748
1749 /* Wakeup USB interface if necessary */
1750 if (hso_get_activity(serial->parent) == -EAGAIN)
1751 goto out;
1752
1753 /* Switch pointers around to avoid memcpy */
1754 temp = serial->tx_buffer;
1755 serial->tx_buffer = serial->tx_data;
1756 serial->tx_data = temp;
1757 serial->tx_data_count = serial->tx_buffer_count;
1758 serial->tx_buffer_count = 0;
1759
1760 /* If temp is set, it means we switched buffers */
1761 if (temp && serial->write_data) {
1762 res = serial->write_data(serial);
1763 if (res >= 0)
1764 serial->tx_urb_used = 1;
1765 }
1766 out:
1767 spin_unlock_irqrestore(&serial->serial_lock, flags);
1768 }
1769
1770 /* make a request (for reading and writing data to muxed serial port) */
1771 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1772 struct urb *ctrl_urb,
1773 struct usb_ctrlrequest *ctrl_req,
1774 u8 *ctrl_urb_data, u32 size)
1775 {
1776 int result;
1777 int pipe;
1778
1779 /* Sanity check */
1780 if (!serial || !ctrl_urb || !ctrl_req) {
1781 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1782 return -EINVAL;
1783 }
1784
1785 /* initialize */
1786 ctrl_req->wValue = 0;
1787 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1788 ctrl_req->wLength = cpu_to_le16(size);
1789
1790 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1791 /* Reading command */
1792 ctrl_req->bRequestType = USB_DIR_IN |
1793 USB_TYPE_OPTION_VENDOR |
1794 USB_RECIP_INTERFACE;
1795 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1796 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1797 } else {
1798 /* Writing command */
1799 ctrl_req->bRequestType = USB_DIR_OUT |
1800 USB_TYPE_OPTION_VENDOR |
1801 USB_RECIP_INTERFACE;
1802 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1803 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1804 }
1805 /* syslog */
1806 D2("%s command (%02x) len: %d, port: %d",
1807 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1808 ctrl_req->bRequestType, ctrl_req->wLength, port);
1809
1810 /* Load ctrl urb */
1811 ctrl_urb->transfer_flags = 0;
1812 usb_fill_control_urb(ctrl_urb,
1813 serial->parent->usb,
1814 pipe,
1815 (u8 *) ctrl_req,
1816 ctrl_urb_data, size, ctrl_callback, serial);
1817 /* Send it on merry way */
1818 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1819 if (result) {
1820 dev_err(&ctrl_urb->dev->dev,
1821 "%s failed submit ctrl_urb %d type %d\n", __func__,
1822 result, type);
1823 return result;
1824 }
1825
1826 /* done */
1827 return size;
1828 }
1829
1830 /* called by intr_callback when read occurs */
1831 static int hso_mux_serial_read(struct hso_serial *serial)
1832 {
1833 if (!serial)
1834 return -EINVAL;
1835
1836 /* clean data */
1837 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1838 /* make the request */
1839
1840 if (serial->num_rx_urbs != 1) {
1841 dev_err(&serial->parent->interface->dev,
1842 "ERROR: mux'd reads with multiple buffers "
1843 "not possible\n");
1844 return 0;
1845 }
1846 return mux_device_request(serial,
1847 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1848 serial->parent->port_spec & HSO_PORT_MASK,
1849 serial->rx_urb[0],
1850 &serial->ctrl_req_rx,
1851 serial->rx_data[0], serial->rx_data_length);
1852 }
1853
1854 /* used for muxed serial port callback (muxed serial read) */
1855 static void intr_callback(struct urb *urb)
1856 {
1857 struct hso_shared_int *shared_int = urb->context;
1858 struct hso_serial *serial;
1859 unsigned char *port_req;
1860 int status = urb->status;
1861 int i;
1862
1863 usb_mark_last_busy(urb->dev);
1864
1865 /* sanity check */
1866 if (!shared_int)
1867 return;
1868
1869 /* status check */
1870 if (status) {
1871 handle_usb_error(status, __func__, NULL);
1872 return;
1873 }
1874 D4("\n--- Got intr callback 0x%02X ---", status);
1875
1876 /* what request? */
1877 port_req = urb->transfer_buffer;
1878 D4(" port_req = 0x%.2X\n", *port_req);
1879 /* loop over all muxed ports to find the one sending this */
1880 for (i = 0; i < 8; i++) {
1881 /* max 8 channels on MUX */
1882 if (*port_req & (1 << i)) {
1883 serial = get_serial_by_shared_int_and_type(shared_int,
1884 (1 << i));
1885 if (serial != NULL) {
1886 D1("Pending read interrupt on port %d\n", i);
1887 spin_lock(&serial->serial_lock);
1888 if (serial->rx_state == RX_IDLE &&
1889 serial->port.count > 0) {
1890 /* Setup and send a ctrl req read on
1891 * port i */
1892 if (!serial->rx_urb_filled[0]) {
1893 serial->rx_state = RX_SENT;
1894 hso_mux_serial_read(serial);
1895 } else
1896 serial->rx_state = RX_PENDING;
1897 } else {
1898 D1("Already a read pending on "
1899 "port %d or port not open\n", i);
1900 }
1901 spin_unlock(&serial->serial_lock);
1902 }
1903 }
1904 }
1905 /* Resubmit interrupt urb */
1906 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1907 }
1908
1909 /* called for writing to muxed serial port */
1910 static int hso_mux_serial_write_data(struct hso_serial *serial)
1911 {
1912 if (NULL == serial)
1913 return -EINVAL;
1914
1915 return mux_device_request(serial,
1916 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1917 serial->parent->port_spec & HSO_PORT_MASK,
1918 serial->tx_urb,
1919 &serial->ctrl_req_tx,
1920 serial->tx_data, serial->tx_data_count);
1921 }
1922
1923 /* write callback for Diag and CS port */
1924 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1925 {
1926 struct hso_serial *serial = urb->context;
1927 int status = urb->status;
1928
1929 /* sanity check */
1930 if (!serial) {
1931 D1("serial == NULL");
1932 return;
1933 }
1934
1935 spin_lock(&serial->serial_lock);
1936 serial->tx_urb_used = 0;
1937 spin_unlock(&serial->serial_lock);
1938 if (status) {
1939 handle_usb_error(status, __func__, serial->parent);
1940 return;
1941 }
1942 hso_put_activity(serial->parent);
1943 tty_port_tty_wakeup(&serial->port);
1944 hso_kick_transmit(serial);
1945
1946 D1(" ");
1947 }
1948
1949 /* called for writing diag or CS serial port */
1950 static int hso_std_serial_write_data(struct hso_serial *serial)
1951 {
1952 int count = serial->tx_data_count;
1953 int result;
1954
1955 usb_fill_bulk_urb(serial->tx_urb,
1956 serial->parent->usb,
1957 usb_sndbulkpipe(serial->parent->usb,
1958 serial->out_endp->
1959 bEndpointAddress & 0x7F),
1960 serial->tx_data, serial->tx_data_count,
1961 hso_std_serial_write_bulk_callback, serial);
1962
1963 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1964 if (result) {
1965 dev_warn(&serial->parent->usb->dev,
1966 "Failed to submit urb - res %d\n", result);
1967 return result;
1968 }
1969
1970 return count;
1971 }
1972
1973 /* callback after read or write on muxed serial port */
1974 static void ctrl_callback(struct urb *urb)
1975 {
1976 struct hso_serial *serial = urb->context;
1977 struct usb_ctrlrequest *req;
1978 int status = urb->status;
1979
1980 /* sanity check */
1981 if (!serial)
1982 return;
1983
1984 spin_lock(&serial->serial_lock);
1985 serial->tx_urb_used = 0;
1986 spin_unlock(&serial->serial_lock);
1987 if (status) {
1988 handle_usb_error(status, __func__, serial->parent);
1989 return;
1990 }
1991
1992 /* what request? */
1993 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1994 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
1995 D4("Actual length of urb = %d\n", urb->actual_length);
1996 DUMP1(urb->transfer_buffer, urb->actual_length);
1997
1998 if (req->bRequestType ==
1999 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2000 /* response to a read command */
2001 serial->rx_urb_filled[0] = 1;
2002 spin_lock(&serial->serial_lock);
2003 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2004 spin_unlock(&serial->serial_lock);
2005 } else {
2006 hso_put_activity(serial->parent);
2007 tty_port_tty_wakeup(&serial->port);
2008 /* response to a write command */
2009 hso_kick_transmit(serial);
2010 }
2011 }
2012
2013 /* handle RX data for serial port */
2014 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2015 {
2016 struct tty_struct *tty;
2017 int write_length_remaining = 0;
2018 int curr_write_len;
2019
2020 /* Sanity check */
2021 if (urb == NULL || serial == NULL) {
2022 D1("serial = NULL");
2023 return -2;
2024 }
2025
2026 tty = tty_port_tty_get(&serial->port);
2027
2028 /* Push data to tty */
2029 write_length_remaining = urb->actual_length -
2030 serial->curr_rx_urb_offset;
2031 D1("data to push to tty");
2032 while (write_length_remaining) {
2033 if (tty && test_bit(TTY_THROTTLED, &tty->flags)) {
2034 tty_kref_put(tty);
2035 return -1;
2036 }
2037 curr_write_len = tty_insert_flip_string(&serial->port,
2038 urb->transfer_buffer + serial->curr_rx_urb_offset,
2039 write_length_remaining);
2040 serial->curr_rx_urb_offset += curr_write_len;
2041 write_length_remaining -= curr_write_len;
2042 tty_flip_buffer_push(&serial->port);
2043 }
2044 tty_kref_put(tty);
2045
2046 if (write_length_remaining == 0) {
2047 serial->curr_rx_urb_offset = 0;
2048 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2049 }
2050 return write_length_remaining;
2051 }
2052
2053
2054 /* Base driver functions */
2055
2056 static void hso_log_port(struct hso_device *hso_dev)
2057 {
2058 char *port_type;
2059 char port_dev[20];
2060
2061 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2062 case HSO_PORT_CONTROL:
2063 port_type = "Control";
2064 break;
2065 case HSO_PORT_APP:
2066 port_type = "Application";
2067 break;
2068 case HSO_PORT_GPS:
2069 port_type = "GPS";
2070 break;
2071 case HSO_PORT_GPS_CONTROL:
2072 port_type = "GPS control";
2073 break;
2074 case HSO_PORT_APP2:
2075 port_type = "Application2";
2076 break;
2077 case HSO_PORT_PCSC:
2078 port_type = "PCSC";
2079 break;
2080 case HSO_PORT_DIAG:
2081 port_type = "Diagnostic";
2082 break;
2083 case HSO_PORT_DIAG2:
2084 port_type = "Diagnostic2";
2085 break;
2086 case HSO_PORT_MODEM:
2087 port_type = "Modem";
2088 break;
2089 case HSO_PORT_NETWORK:
2090 port_type = "Network";
2091 break;
2092 default:
2093 port_type = "Unknown";
2094 break;
2095 }
2096 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2097 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2098 } else
2099 sprintf(port_dev, "/dev/%s%d", tty_filename,
2100 dev2ser(hso_dev)->minor);
2101
2102 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2103 port_type, port_dev);
2104 }
2105
2106 static int hso_start_net_device(struct hso_device *hso_dev)
2107 {
2108 int i, result = 0;
2109 struct hso_net *hso_net = dev2net(hso_dev);
2110
2111 if (!hso_net)
2112 return -ENODEV;
2113
2114 /* send URBs for all read buffers */
2115 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2116
2117 /* Prep a receive URB */
2118 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2119 hso_dev->usb,
2120 usb_rcvbulkpipe(hso_dev->usb,
2121 hso_net->in_endp->
2122 bEndpointAddress & 0x7F),
2123 hso_net->mux_bulk_rx_buf_pool[i],
2124 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2125 hso_net);
2126
2127 /* Put it out there so the device can send us stuff */
2128 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2129 GFP_NOIO);
2130 if (result)
2131 dev_warn(&hso_dev->usb->dev,
2132 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2133 i, result);
2134 }
2135
2136 return result;
2137 }
2138
2139 static int hso_stop_net_device(struct hso_device *hso_dev)
2140 {
2141 int i;
2142 struct hso_net *hso_net = dev2net(hso_dev);
2143
2144 if (!hso_net)
2145 return -ENODEV;
2146
2147 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2148 if (hso_net->mux_bulk_rx_urb_pool[i])
2149 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2150
2151 }
2152 if (hso_net->mux_bulk_tx_urb)
2153 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2154
2155 return 0;
2156 }
2157
2158 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2159 {
2160 int i, result = 0;
2161 struct hso_serial *serial = dev2ser(hso_dev);
2162
2163 if (!serial)
2164 return -ENODEV;
2165
2166 /* If it is not the MUX port fill in and submit a bulk urb (already
2167 * allocated in hso_serial_start) */
2168 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2169 for (i = 0; i < serial->num_rx_urbs; i++) {
2170 usb_fill_bulk_urb(serial->rx_urb[i],
2171 serial->parent->usb,
2172 usb_rcvbulkpipe(serial->parent->usb,
2173 serial->in_endp->
2174 bEndpointAddress &
2175 0x7F),
2176 serial->rx_data[i],
2177 serial->rx_data_length,
2178 hso_std_serial_read_bulk_callback,
2179 serial);
2180 result = usb_submit_urb(serial->rx_urb[i], flags);
2181 if (result) {
2182 dev_warn(&serial->parent->usb->dev,
2183 "Failed to submit urb - res %d\n",
2184 result);
2185 break;
2186 }
2187 }
2188 } else {
2189 mutex_lock(&serial->shared_int->shared_int_lock);
2190 if (!serial->shared_int->use_count) {
2191 result =
2192 hso_mux_submit_intr_urb(serial->shared_int,
2193 hso_dev->usb, flags);
2194 }
2195 serial->shared_int->use_count++;
2196 mutex_unlock(&serial->shared_int->shared_int_lock);
2197 }
2198 if (serial->tiocmget)
2199 tiocmget_submit_urb(serial,
2200 serial->tiocmget,
2201 serial->parent->usb);
2202 return result;
2203 }
2204
2205 static int hso_stop_serial_device(struct hso_device *hso_dev)
2206 {
2207 int i;
2208 struct hso_serial *serial = dev2ser(hso_dev);
2209 struct hso_tiocmget *tiocmget;
2210
2211 if (!serial)
2212 return -ENODEV;
2213
2214 for (i = 0; i < serial->num_rx_urbs; i++) {
2215 if (serial->rx_urb[i]) {
2216 usb_kill_urb(serial->rx_urb[i]);
2217 serial->rx_urb_filled[i] = 0;
2218 }
2219 }
2220 serial->curr_rx_urb_idx = 0;
2221 serial->curr_rx_urb_offset = 0;
2222
2223 if (serial->tx_urb)
2224 usb_kill_urb(serial->tx_urb);
2225
2226 if (serial->shared_int) {
2227 mutex_lock(&serial->shared_int->shared_int_lock);
2228 if (serial->shared_int->use_count &&
2229 (--serial->shared_int->use_count == 0)) {
2230 struct urb *urb;
2231
2232 urb = serial->shared_int->shared_intr_urb;
2233 if (urb)
2234 usb_kill_urb(urb);
2235 }
2236 mutex_unlock(&serial->shared_int->shared_int_lock);
2237 }
2238 tiocmget = serial->tiocmget;
2239 if (tiocmget) {
2240 wake_up_interruptible(&tiocmget->waitq);
2241 usb_kill_urb(tiocmget->urb);
2242 }
2243
2244 return 0;
2245 }
2246
2247 static void hso_serial_common_free(struct hso_serial *serial)
2248 {
2249 int i;
2250
2251 if (serial->parent->dev)
2252 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2253
2254 tty_unregister_device(tty_drv, serial->minor);
2255
2256 for (i = 0; i < serial->num_rx_urbs; i++) {
2257 /* unlink and free RX URB */
2258 usb_free_urb(serial->rx_urb[i]);
2259 /* free the RX buffer */
2260 kfree(serial->rx_data[i]);
2261 }
2262
2263 /* unlink and free TX URB */
2264 usb_free_urb(serial->tx_urb);
2265 kfree(serial->tx_data);
2266 tty_port_destroy(&serial->port);
2267 }
2268
2269 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2270 int rx_size, int tx_size)
2271 {
2272 struct device *dev;
2273 int minor;
2274 int i;
2275
2276 tty_port_init(&serial->port);
2277
2278 minor = get_free_serial_index();
2279 if (minor < 0)
2280 goto exit;
2281
2282 /* register our minor number */
2283 serial->parent->dev = tty_port_register_device(&serial->port, tty_drv,
2284 minor, &serial->parent->interface->dev);
2285 dev = serial->parent->dev;
2286 dev_set_drvdata(dev, serial->parent);
2287 i = device_create_file(dev, &dev_attr_hsotype);
2288
2289 /* fill in specific data for later use */
2290 serial->minor = minor;
2291 serial->magic = HSO_SERIAL_MAGIC;
2292 spin_lock_init(&serial->serial_lock);
2293 serial->num_rx_urbs = num_urbs;
2294
2295 /* RX, allocate urb and initialize */
2296
2297 /* prepare our RX buffer */
2298 serial->rx_data_length = rx_size;
2299 for (i = 0; i < serial->num_rx_urbs; i++) {
2300 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2301 if (!serial->rx_urb[i]) {
2302 dev_err(dev, "Could not allocate urb?\n");
2303 goto exit;
2304 }
2305 serial->rx_urb[i]->transfer_buffer = NULL;
2306 serial->rx_urb[i]->transfer_buffer_length = 0;
2307 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2308 GFP_KERNEL);
2309 if (!serial->rx_data[i])
2310 goto exit;
2311 }
2312
2313 /* TX, allocate urb and initialize */
2314 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2315 if (!serial->tx_urb) {
2316 dev_err(dev, "Could not allocate urb?\n");
2317 goto exit;
2318 }
2319 serial->tx_urb->transfer_buffer = NULL;
2320 serial->tx_urb->transfer_buffer_length = 0;
2321 /* prepare our TX buffer */
2322 serial->tx_data_count = 0;
2323 serial->tx_buffer_count = 0;
2324 serial->tx_data_length = tx_size;
2325 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2326 if (!serial->tx_data)
2327 goto exit;
2328
2329 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2330 if (!serial->tx_buffer)
2331 goto exit;
2332
2333 return 0;
2334 exit:
2335 hso_serial_common_free(serial);
2336 return -1;
2337 }
2338
2339 /* Creates a general hso device */
2340 static struct hso_device *hso_create_device(struct usb_interface *intf,
2341 int port_spec)
2342 {
2343 struct hso_device *hso_dev;
2344
2345 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2346 if (!hso_dev)
2347 return NULL;
2348
2349 hso_dev->port_spec = port_spec;
2350 hso_dev->usb = interface_to_usbdev(intf);
2351 hso_dev->interface = intf;
2352 kref_init(&hso_dev->ref);
2353 mutex_init(&hso_dev->mutex);
2354
2355 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2356 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2357 INIT_WORK(&hso_dev->reset_device, reset_device);
2358
2359 return hso_dev;
2360 }
2361
2362 /* Removes a network device in the network device table */
2363 static int remove_net_device(struct hso_device *hso_dev)
2364 {
2365 int i;
2366
2367 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2368 if (network_table[i] == hso_dev) {
2369 network_table[i] = NULL;
2370 break;
2371 }
2372 }
2373 if (i == HSO_MAX_NET_DEVICES)
2374 return -1;
2375 return 0;
2376 }
2377
2378 /* Frees our network device */
2379 static void hso_free_net_device(struct hso_device *hso_dev)
2380 {
2381 int i;
2382 struct hso_net *hso_net = dev2net(hso_dev);
2383
2384 if (!hso_net)
2385 return;
2386
2387 remove_net_device(hso_net->parent);
2388
2389 if (hso_net->net)
2390 unregister_netdev(hso_net->net);
2391
2392 /* start freeing */
2393 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2394 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2395 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2396 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2397 }
2398 usb_free_urb(hso_net->mux_bulk_tx_urb);
2399 kfree(hso_net->mux_bulk_tx_buf);
2400 hso_net->mux_bulk_tx_buf = NULL;
2401
2402 if (hso_net->net)
2403 free_netdev(hso_net->net);
2404
2405 kfree(hso_dev);
2406 }
2407
2408 static const struct net_device_ops hso_netdev_ops = {
2409 .ndo_open = hso_net_open,
2410 .ndo_stop = hso_net_close,
2411 .ndo_start_xmit = hso_net_start_xmit,
2412 .ndo_tx_timeout = hso_net_tx_timeout,
2413 };
2414
2415 /* initialize the network interface */
2416 static void hso_net_init(struct net_device *net)
2417 {
2418 struct hso_net *hso_net = netdev_priv(net);
2419
2420 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2421
2422 /* fill in the other fields */
2423 net->netdev_ops = &hso_netdev_ops;
2424 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2425 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2426 net->type = ARPHRD_NONE;
2427 net->mtu = DEFAULT_MTU - 14;
2428 net->tx_queue_len = 10;
2429 SET_ETHTOOL_OPS(net, &ops);
2430
2431 /* and initialize the semaphore */
2432 spin_lock_init(&hso_net->net_lock);
2433 }
2434
2435 /* Adds a network device in the network device table */
2436 static int add_net_device(struct hso_device *hso_dev)
2437 {
2438 int i;
2439
2440 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2441 if (network_table[i] == NULL) {
2442 network_table[i] = hso_dev;
2443 break;
2444 }
2445 }
2446 if (i == HSO_MAX_NET_DEVICES)
2447 return -1;
2448 return 0;
2449 }
2450
2451 static int hso_rfkill_set_block(void *data, bool blocked)
2452 {
2453 struct hso_device *hso_dev = data;
2454 int enabled = !blocked;
2455 int rv;
2456
2457 mutex_lock(&hso_dev->mutex);
2458 if (hso_dev->usb_gone)
2459 rv = 0;
2460 else
2461 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2462 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2463 USB_CTRL_SET_TIMEOUT);
2464 mutex_unlock(&hso_dev->mutex);
2465 return rv;
2466 }
2467
2468 static const struct rfkill_ops hso_rfkill_ops = {
2469 .set_block = hso_rfkill_set_block,
2470 };
2471
2472 /* Creates and sets up everything for rfkill */
2473 static void hso_create_rfkill(struct hso_device *hso_dev,
2474 struct usb_interface *interface)
2475 {
2476 struct hso_net *hso_net = dev2net(hso_dev);
2477 struct device *dev = &hso_net->net->dev;
2478 char *rfkn;
2479
2480 rfkn = kzalloc(20, GFP_KERNEL);
2481 if (!rfkn)
2482 dev_err(dev, "%s - Out of memory\n", __func__);
2483
2484 snprintf(rfkn, 20, "hso-%d",
2485 interface->altsetting->desc.bInterfaceNumber);
2486
2487 hso_net->rfkill = rfkill_alloc(rfkn,
2488 &interface_to_usbdev(interface)->dev,
2489 RFKILL_TYPE_WWAN,
2490 &hso_rfkill_ops, hso_dev);
2491 if (!hso_net->rfkill) {
2492 dev_err(dev, "%s - Out of memory\n", __func__);
2493 kfree(rfkn);
2494 return;
2495 }
2496 if (rfkill_register(hso_net->rfkill) < 0) {
2497 rfkill_destroy(hso_net->rfkill);
2498 kfree(rfkn);
2499 hso_net->rfkill = NULL;
2500 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2501 return;
2502 }
2503 }
2504
2505 static struct device_type hso_type = {
2506 .name = "wwan",
2507 };
2508
2509 /* Creates our network device */
2510 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2511 int port_spec)
2512 {
2513 int result, i;
2514 struct net_device *net;
2515 struct hso_net *hso_net;
2516 struct hso_device *hso_dev;
2517
2518 hso_dev = hso_create_device(interface, port_spec);
2519 if (!hso_dev)
2520 return NULL;
2521
2522 /* allocate our network device, then we can put in our private data */
2523 /* call hso_net_init to do the basic initialization */
2524 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2525 if (!net) {
2526 dev_err(&interface->dev, "Unable to create ethernet device\n");
2527 goto exit;
2528 }
2529
2530 hso_net = netdev_priv(net);
2531
2532 hso_dev->port_data.dev_net = hso_net;
2533 hso_net->net = net;
2534 hso_net->parent = hso_dev;
2535
2536 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2537 USB_DIR_IN);
2538 if (!hso_net->in_endp) {
2539 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2540 goto exit;
2541 }
2542 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2543 USB_DIR_OUT);
2544 if (!hso_net->out_endp) {
2545 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2546 goto exit;
2547 }
2548 SET_NETDEV_DEV(net, &interface->dev);
2549 SET_NETDEV_DEVTYPE(net, &hso_type);
2550
2551 /* registering our net device */
2552 result = register_netdev(net);
2553 if (result) {
2554 dev_err(&interface->dev, "Failed to register device\n");
2555 goto exit;
2556 }
2557
2558 /* start allocating */
2559 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2560 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2561 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2562 dev_err(&interface->dev, "Could not allocate rx urb\n");
2563 goto exit;
2564 }
2565 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2566 GFP_KERNEL);
2567 if (!hso_net->mux_bulk_rx_buf_pool[i])
2568 goto exit;
2569 }
2570 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2571 if (!hso_net->mux_bulk_tx_urb) {
2572 dev_err(&interface->dev, "Could not allocate tx urb\n");
2573 goto exit;
2574 }
2575 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2576 if (!hso_net->mux_bulk_tx_buf)
2577 goto exit;
2578
2579 add_net_device(hso_dev);
2580
2581 hso_log_port(hso_dev);
2582
2583 hso_create_rfkill(hso_dev, interface);
2584
2585 return hso_dev;
2586 exit:
2587 hso_free_net_device(hso_dev);
2588 return NULL;
2589 }
2590
2591 static void hso_free_tiomget(struct hso_serial *serial)
2592 {
2593 struct hso_tiocmget *tiocmget;
2594 if (!serial)
2595 return;
2596 tiocmget = serial->tiocmget;
2597 if (tiocmget) {
2598 usb_free_urb(tiocmget->urb);
2599 tiocmget->urb = NULL;
2600 serial->tiocmget = NULL;
2601 kfree(tiocmget);
2602 }
2603 }
2604
2605 /* Frees an AT channel ( goes for both mux and non-mux ) */
2606 static void hso_free_serial_device(struct hso_device *hso_dev)
2607 {
2608 struct hso_serial *serial = dev2ser(hso_dev);
2609
2610 if (!serial)
2611 return;
2612 set_serial_by_index(serial->minor, NULL);
2613
2614 hso_serial_common_free(serial);
2615
2616 if (serial->shared_int) {
2617 mutex_lock(&serial->shared_int->shared_int_lock);
2618 if (--serial->shared_int->ref_count == 0)
2619 hso_free_shared_int(serial->shared_int);
2620 else
2621 mutex_unlock(&serial->shared_int->shared_int_lock);
2622 }
2623 hso_free_tiomget(serial);
2624 kfree(serial);
2625 kfree(hso_dev);
2626 }
2627
2628 /* Creates a bulk AT channel */
2629 static struct hso_device *hso_create_bulk_serial_device(
2630 struct usb_interface *interface, int port)
2631 {
2632 struct hso_device *hso_dev;
2633 struct hso_serial *serial;
2634 int num_urbs;
2635 struct hso_tiocmget *tiocmget;
2636
2637 hso_dev = hso_create_device(interface, port);
2638 if (!hso_dev)
2639 return NULL;
2640
2641 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2642 if (!serial)
2643 goto exit;
2644
2645 serial->parent = hso_dev;
2646 hso_dev->port_data.dev_serial = serial;
2647
2648 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2649 num_urbs = 2;
2650 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2651 GFP_KERNEL);
2652 /* it isn't going to break our heart if serial->tiocmget
2653 * allocation fails don't bother checking this.
2654 */
2655 if (serial->tiocmget) {
2656 tiocmget = serial->tiocmget;
2657 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2658 if (tiocmget->urb) {
2659 mutex_init(&tiocmget->mutex);
2660 init_waitqueue_head(&tiocmget->waitq);
2661 tiocmget->endp = hso_get_ep(
2662 interface,
2663 USB_ENDPOINT_XFER_INT,
2664 USB_DIR_IN);
2665 } else
2666 hso_free_tiomget(serial);
2667 }
2668 }
2669 else
2670 num_urbs = 1;
2671
2672 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2673 BULK_URB_TX_SIZE))
2674 goto exit;
2675
2676 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2677 USB_DIR_IN);
2678 if (!serial->in_endp) {
2679 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2680 goto exit2;
2681 }
2682
2683 if (!
2684 (serial->out_endp =
2685 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2686 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2687 goto exit2;
2688 }
2689
2690 serial->write_data = hso_std_serial_write_data;
2691
2692 /* and record this serial */
2693 set_serial_by_index(serial->minor, serial);
2694
2695 /* setup the proc dirs and files if needed */
2696 hso_log_port(hso_dev);
2697
2698 /* done, return it */
2699 return hso_dev;
2700
2701 exit2:
2702 hso_serial_common_free(serial);
2703 exit:
2704 hso_free_tiomget(serial);
2705 kfree(serial);
2706 kfree(hso_dev);
2707 return NULL;
2708 }
2709
2710 /* Creates a multiplexed AT channel */
2711 static
2712 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2713 int port,
2714 struct hso_shared_int *mux)
2715 {
2716 struct hso_device *hso_dev;
2717 struct hso_serial *serial;
2718 int port_spec;
2719
2720 port_spec = HSO_INTF_MUX;
2721 port_spec &= ~HSO_PORT_MASK;
2722
2723 port_spec |= hso_mux_to_port(port);
2724 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2725 return NULL;
2726
2727 hso_dev = hso_create_device(interface, port_spec);
2728 if (!hso_dev)
2729 return NULL;
2730
2731 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2732 if (!serial)
2733 goto exit;
2734
2735 hso_dev->port_data.dev_serial = serial;
2736 serial->parent = hso_dev;
2737
2738 if (hso_serial_common_create
2739 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2740 goto exit;
2741
2742 serial->tx_data_length--;
2743 serial->write_data = hso_mux_serial_write_data;
2744
2745 serial->shared_int = mux;
2746 mutex_lock(&serial->shared_int->shared_int_lock);
2747 serial->shared_int->ref_count++;
2748 mutex_unlock(&serial->shared_int->shared_int_lock);
2749
2750 /* and record this serial */
2751 set_serial_by_index(serial->minor, serial);
2752
2753 /* setup the proc dirs and files if needed */
2754 hso_log_port(hso_dev);
2755
2756 /* done, return it */
2757 return hso_dev;
2758
2759 exit:
2760 if (serial) {
2761 tty_unregister_device(tty_drv, serial->minor);
2762 kfree(serial);
2763 }
2764 if (hso_dev)
2765 kfree(hso_dev);
2766 return NULL;
2767
2768 }
2769
2770 static void hso_free_shared_int(struct hso_shared_int *mux)
2771 {
2772 usb_free_urb(mux->shared_intr_urb);
2773 kfree(mux->shared_intr_buf);
2774 mutex_unlock(&mux->shared_int_lock);
2775 kfree(mux);
2776 }
2777
2778 static
2779 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2780 {
2781 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2782
2783 if (!mux)
2784 return NULL;
2785
2786 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2787 USB_DIR_IN);
2788 if (!mux->intr_endp) {
2789 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2790 goto exit;
2791 }
2792
2793 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2794 if (!mux->shared_intr_urb) {
2795 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2796 goto exit;
2797 }
2798 mux->shared_intr_buf =
2799 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2800 GFP_KERNEL);
2801 if (!mux->shared_intr_buf)
2802 goto exit;
2803
2804 mutex_init(&mux->shared_int_lock);
2805
2806 return mux;
2807
2808 exit:
2809 kfree(mux->shared_intr_buf);
2810 usb_free_urb(mux->shared_intr_urb);
2811 kfree(mux);
2812 return NULL;
2813 }
2814
2815 /* Gets the port spec for a certain interface */
2816 static int hso_get_config_data(struct usb_interface *interface)
2817 {
2818 struct usb_device *usbdev = interface_to_usbdev(interface);
2819 u8 config_data[17];
2820 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2821 s32 result;
2822
2823 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2824 0x86, 0xC0, 0, 0, config_data, 17,
2825 USB_CTRL_SET_TIMEOUT) != 0x11) {
2826 return -EIO;
2827 }
2828
2829 switch (config_data[if_num]) {
2830 case 0x0:
2831 result = 0;
2832 break;
2833 case 0x1:
2834 result = HSO_PORT_DIAG;
2835 break;
2836 case 0x2:
2837 result = HSO_PORT_GPS;
2838 break;
2839 case 0x3:
2840 result = HSO_PORT_GPS_CONTROL;
2841 break;
2842 case 0x4:
2843 result = HSO_PORT_APP;
2844 break;
2845 case 0x5:
2846 result = HSO_PORT_APP2;
2847 break;
2848 case 0x6:
2849 result = HSO_PORT_CONTROL;
2850 break;
2851 case 0x7:
2852 result = HSO_PORT_NETWORK;
2853 break;
2854 case 0x8:
2855 result = HSO_PORT_MODEM;
2856 break;
2857 case 0x9:
2858 result = HSO_PORT_MSD;
2859 break;
2860 case 0xa:
2861 result = HSO_PORT_PCSC;
2862 break;
2863 case 0xb:
2864 result = HSO_PORT_VOICE;
2865 break;
2866 default:
2867 result = 0;
2868 }
2869
2870 if (result)
2871 result |= HSO_INTF_BULK;
2872
2873 if (config_data[16] & 0x1)
2874 result |= HSO_INFO_CRC_BUG;
2875
2876 return result;
2877 }
2878
2879 /* called once for each interface upon device insertion */
2880 static int hso_probe(struct usb_interface *interface,
2881 const struct usb_device_id *id)
2882 {
2883 int mux, i, if_num, port_spec;
2884 unsigned char port_mask;
2885 struct hso_device *hso_dev = NULL;
2886 struct hso_shared_int *shared_int;
2887 struct hso_device *tmp_dev = NULL;
2888
2889 if_num = interface->altsetting->desc.bInterfaceNumber;
2890
2891 /* Get the interface/port specification from either driver_info or from
2892 * the device itself */
2893 if (id->driver_info)
2894 port_spec = ((u32 *)(id->driver_info))[if_num];
2895 else
2896 port_spec = hso_get_config_data(interface);
2897
2898 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2899 dev_err(&interface->dev, "Not our interface\n");
2900 return -ENODEV;
2901 }
2902 /* Check if we need to switch to alt interfaces prior to port
2903 * configuration */
2904 if (interface->num_altsetting > 1)
2905 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2906 interface->needs_remote_wakeup = 1;
2907
2908 /* Allocate new hso device(s) */
2909 switch (port_spec & HSO_INTF_MASK) {
2910 case HSO_INTF_MUX:
2911 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2912 /* Create the network device */
2913 if (!disable_net) {
2914 hso_dev = hso_create_net_device(interface,
2915 port_spec);
2916 if (!hso_dev)
2917 goto exit;
2918 tmp_dev = hso_dev;
2919 }
2920 }
2921
2922 if (hso_get_mux_ports(interface, &port_mask))
2923 /* TODO: de-allocate everything */
2924 goto exit;
2925
2926 shared_int = hso_create_shared_int(interface);
2927 if (!shared_int)
2928 goto exit;
2929
2930 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2931 if (port_mask & i) {
2932 hso_dev = hso_create_mux_serial_device(
2933 interface, i, shared_int);
2934 if (!hso_dev)
2935 goto exit;
2936 }
2937 }
2938
2939 if (tmp_dev)
2940 hso_dev = tmp_dev;
2941 break;
2942
2943 case HSO_INTF_BULK:
2944 /* It's a regular bulk interface */
2945 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2946 if (!disable_net)
2947 hso_dev =
2948 hso_create_net_device(interface, port_spec);
2949 } else {
2950 hso_dev =
2951 hso_create_bulk_serial_device(interface, port_spec);
2952 }
2953 if (!hso_dev)
2954 goto exit;
2955 break;
2956 default:
2957 goto exit;
2958 }
2959
2960 /* save our data pointer in this device */
2961 usb_set_intfdata(interface, hso_dev);
2962
2963 /* done */
2964 return 0;
2965 exit:
2966 hso_free_interface(interface);
2967 return -ENODEV;
2968 }
2969
2970 /* device removed, cleaning up */
2971 static void hso_disconnect(struct usb_interface *interface)
2972 {
2973 hso_free_interface(interface);
2974
2975 /* remove reference of our private data */
2976 usb_set_intfdata(interface, NULL);
2977 }
2978
2979 static void async_get_intf(struct work_struct *data)
2980 {
2981 struct hso_device *hso_dev =
2982 container_of(data, struct hso_device, async_get_intf);
2983 usb_autopm_get_interface(hso_dev->interface);
2984 }
2985
2986 static void async_put_intf(struct work_struct *data)
2987 {
2988 struct hso_device *hso_dev =
2989 container_of(data, struct hso_device, async_put_intf);
2990 usb_autopm_put_interface(hso_dev->interface);
2991 }
2992
2993 static int hso_get_activity(struct hso_device *hso_dev)
2994 {
2995 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2996 if (!hso_dev->is_active) {
2997 hso_dev->is_active = 1;
2998 schedule_work(&hso_dev->async_get_intf);
2999 }
3000 }
3001
3002 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3003 return -EAGAIN;
3004
3005 usb_mark_last_busy(hso_dev->usb);
3006
3007 return 0;
3008 }
3009
3010 static int hso_put_activity(struct hso_device *hso_dev)
3011 {
3012 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3013 if (hso_dev->is_active) {
3014 hso_dev->is_active = 0;
3015 schedule_work(&hso_dev->async_put_intf);
3016 return -EAGAIN;
3017 }
3018 }
3019 hso_dev->is_active = 0;
3020 return 0;
3021 }
3022
3023 /* called by kernel when we need to suspend device */
3024 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3025 {
3026 int i, result;
3027
3028 /* Stop all serial ports */
3029 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3030 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3031 result = hso_stop_serial_device(serial_table[i]);
3032 if (result)
3033 goto out;
3034 }
3035 }
3036
3037 /* Stop all network ports */
3038 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3039 if (network_table[i] &&
3040 (network_table[i]->interface == iface)) {
3041 result = hso_stop_net_device(network_table[i]);
3042 if (result)
3043 goto out;
3044 }
3045 }
3046
3047 out:
3048 return 0;
3049 }
3050
3051 /* called by kernel when we need to resume device */
3052 static int hso_resume(struct usb_interface *iface)
3053 {
3054 int i, result = 0;
3055 struct hso_net *hso_net;
3056
3057 /* Start all serial ports */
3058 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3059 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3060 if (dev2ser(serial_table[i])->port.count) {
3061 result =
3062 hso_start_serial_device(serial_table[i], GFP_NOIO);
3063 hso_kick_transmit(dev2ser(serial_table[i]));
3064 if (result)
3065 goto out;
3066 }
3067 }
3068 }
3069
3070 /* Start all network ports */
3071 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3072 if (network_table[i] &&
3073 (network_table[i]->interface == iface)) {
3074 hso_net = dev2net(network_table[i]);
3075 if (hso_net->flags & IFF_UP) {
3076 /* First transmit any lingering data,
3077 then restart the device. */
3078 if (hso_net->skb_tx_buf) {
3079 dev_dbg(&iface->dev,
3080 "Transmitting"
3081 " lingering data\n");
3082 hso_net_start_xmit(hso_net->skb_tx_buf,
3083 hso_net->net);
3084 hso_net->skb_tx_buf = NULL;
3085 }
3086 result = hso_start_net_device(network_table[i]);
3087 if (result)
3088 goto out;
3089 }
3090 }
3091 }
3092
3093 out:
3094 return result;
3095 }
3096
3097 static void reset_device(struct work_struct *data)
3098 {
3099 struct hso_device *hso_dev =
3100 container_of(data, struct hso_device, reset_device);
3101 struct usb_device *usb = hso_dev->usb;
3102 int result;
3103
3104 if (hso_dev->usb_gone) {
3105 D1("No reset during disconnect\n");
3106 } else {
3107 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3108 if (result < 0)
3109 D1("unable to lock device for reset: %d\n", result);
3110 else {
3111 usb_reset_device(usb);
3112 usb_unlock_device(usb);
3113 }
3114 }
3115 }
3116
3117 static void hso_serial_ref_free(struct kref *ref)
3118 {
3119 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3120
3121 hso_free_serial_device(hso_dev);
3122 }
3123
3124 static void hso_free_interface(struct usb_interface *interface)
3125 {
3126 struct hso_serial *hso_dev;
3127 int i;
3128
3129 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3130 if (serial_table[i] &&
3131 (serial_table[i]->interface == interface)) {
3132 hso_dev = dev2ser(serial_table[i]);
3133 tty_port_tty_hangup(&hso_dev->port, false);
3134 mutex_lock(&hso_dev->parent->mutex);
3135 hso_dev->parent->usb_gone = 1;
3136 mutex_unlock(&hso_dev->parent->mutex);
3137 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3138 }
3139 }
3140
3141 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3142 if (network_table[i] &&
3143 (network_table[i]->interface == interface)) {
3144 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3145 /* hso_stop_net_device doesn't stop the net queue since
3146 * traffic needs to start it again when suspended */
3147 netif_stop_queue(dev2net(network_table[i])->net);
3148 hso_stop_net_device(network_table[i]);
3149 cancel_work_sync(&network_table[i]->async_put_intf);
3150 cancel_work_sync(&network_table[i]->async_get_intf);
3151 if (rfk) {
3152 rfkill_unregister(rfk);
3153 rfkill_destroy(rfk);
3154 }
3155 hso_free_net_device(network_table[i]);
3156 }
3157 }
3158 }
3159
3160 /* Helper functions */
3161
3162 /* Get the endpoint ! */
3163 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3164 int type, int dir)
3165 {
3166 int i;
3167 struct usb_host_interface *iface = intf->cur_altsetting;
3168 struct usb_endpoint_descriptor *endp;
3169
3170 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3171 endp = &iface->endpoint[i].desc;
3172 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3173 (usb_endpoint_type(endp) == type))
3174 return endp;
3175 }
3176
3177 return NULL;
3178 }
3179
3180 /* Get the byte that describes which ports are enabled */
3181 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3182 {
3183 int i;
3184 struct usb_host_interface *iface = intf->cur_altsetting;
3185
3186 if (iface->extralen == 3) {
3187 *ports = iface->extra[2];
3188 return 0;
3189 }
3190
3191 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3192 if (iface->endpoint[i].extralen == 3) {
3193 *ports = iface->endpoint[i].extra[2];
3194 return 0;
3195 }
3196 }
3197
3198 return -1;
3199 }
3200
3201 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3202 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3203 struct usb_device *usb, gfp_t gfp)
3204 {
3205 int result;
3206
3207 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3208 usb_rcvintpipe(usb,
3209 shared_int->intr_endp->bEndpointAddress & 0x7F),
3210 shared_int->shared_intr_buf,
3211 1,
3212 intr_callback, shared_int,
3213 shared_int->intr_endp->bInterval);
3214
3215 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3216 if (result)
3217 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3218 result);
3219
3220 return result;
3221 }
3222
3223 /* operations setup of the serial interface */
3224 static const struct tty_operations hso_serial_ops = {
3225 .open = hso_serial_open,
3226 .close = hso_serial_close,
3227 .write = hso_serial_write,
3228 .write_room = hso_serial_write_room,
3229 .ioctl = hso_serial_ioctl,
3230 .set_termios = hso_serial_set_termios,
3231 .chars_in_buffer = hso_serial_chars_in_buffer,
3232 .tiocmget = hso_serial_tiocmget,
3233 .tiocmset = hso_serial_tiocmset,
3234 .get_icount = hso_get_count,
3235 .unthrottle = hso_unthrottle
3236 };
3237
3238 static struct usb_driver hso_driver = {
3239 .name = driver_name,
3240 .probe = hso_probe,
3241 .disconnect = hso_disconnect,
3242 .id_table = hso_ids,
3243 .suspend = hso_suspend,
3244 .resume = hso_resume,
3245 .reset_resume = hso_resume,
3246 .supports_autosuspend = 1,
3247 .disable_hub_initiated_lpm = 1,
3248 };
3249
3250 static int __init hso_init(void)
3251 {
3252 int i;
3253 int result;
3254
3255 /* put it in the log */
3256 printk(KERN_INFO "hso: %s\n", version);
3257
3258 /* Initialise the serial table semaphore and table */
3259 spin_lock_init(&serial_table_lock);
3260 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3261 serial_table[i] = NULL;
3262
3263 /* allocate our driver using the proper amount of supported minors */
3264 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3265 if (!tty_drv)
3266 return -ENOMEM;
3267
3268 /* fill in all needed values */
3269 tty_drv->driver_name = driver_name;
3270 tty_drv->name = tty_filename;
3271
3272 /* if major number is provided as parameter, use that one */
3273 if (tty_major)
3274 tty_drv->major = tty_major;
3275
3276 tty_drv->minor_start = 0;
3277 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3278 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3279 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3280 tty_drv->init_termios = tty_std_termios;
3281 hso_init_termios(&tty_drv->init_termios);
3282 tty_set_operations(tty_drv, &hso_serial_ops);
3283
3284 /* register the tty driver */
3285 result = tty_register_driver(tty_drv);
3286 if (result) {
3287 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3288 __func__, result);
3289 goto err_free_tty;
3290 }
3291
3292 /* register this module as an usb driver */
3293 result = usb_register(&hso_driver);
3294 if (result) {
3295 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3296 result);
3297 goto err_unreg_tty;
3298 }
3299
3300 /* done */
3301 return 0;
3302 err_unreg_tty:
3303 tty_unregister_driver(tty_drv);
3304 err_free_tty:
3305 put_tty_driver(tty_drv);
3306 return result;
3307 }
3308
3309 static void __exit hso_exit(void)
3310 {
3311 printk(KERN_INFO "hso: unloaded\n");
3312
3313 tty_unregister_driver(tty_drv);
3314 put_tty_driver(tty_drv);
3315 /* deregister the usb driver */
3316 usb_deregister(&hso_driver);
3317 }
3318
3319 /* Module definitions */
3320 module_init(hso_init);
3321 module_exit(hso_exit);
3322
3323 MODULE_AUTHOR(MOD_AUTHOR);
3324 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3325 MODULE_LICENSE(MOD_LICENSE);
3326
3327 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3328 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3329 module_param(debug, int, S_IRUGO | S_IWUSR);
3330
3331 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3332 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3333 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3334
3335 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3336 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3337 module_param(disable_net, int, S_IRUGO | S_IWUSR);
Linux kernel - Deliverables
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