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TTY: use tty_port_register_device
[linux-2.6.git] / drivers / net / usb / hso.c
blob605a4baa9b7b89083e27c5a5d8b76ef938959dd4
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 struct tty_struct *tty;
1929
1930 /* sanity check */
1931 if (!serial) {
1932 D1("serial == NULL");
1933 return;
1934 }
1935
1936 spin_lock(&serial->serial_lock);
1937 serial->tx_urb_used = 0;
1938 spin_unlock(&serial->serial_lock);
1939 if (status) {
1940 handle_usb_error(status, __func__, serial->parent);
1941 return;
1942 }
1943 hso_put_activity(serial->parent);
1944 tty = tty_port_tty_get(&serial->port);
1945 if (tty) {
1946 tty_wakeup(tty);
1947 tty_kref_put(tty);
1948 }
1949 hso_kick_transmit(serial);
1950
1951 D1(" ");
1952 }
1953
1954 /* called for writing diag or CS serial port */
1955 static int hso_std_serial_write_data(struct hso_serial *serial)
1956 {
1957 int count = serial->tx_data_count;
1958 int result;
1959
1960 usb_fill_bulk_urb(serial->tx_urb,
1961 serial->parent->usb,
1962 usb_sndbulkpipe(serial->parent->usb,
1963 serial->out_endp->
1964 bEndpointAddress & 0x7F),
1965 serial->tx_data, serial->tx_data_count,
1966 hso_std_serial_write_bulk_callback, serial);
1967
1968 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1969 if (result) {
1970 dev_warn(&serial->parent->usb->dev,
1971 "Failed to submit urb - res %d\n", result);
1972 return result;
1973 }
1974
1975 return count;
1976 }
1977
1978 /* callback after read or write on muxed serial port */
1979 static void ctrl_callback(struct urb *urb)
1980 {
1981 struct hso_serial *serial = urb->context;
1982 struct usb_ctrlrequest *req;
1983 int status = urb->status;
1984
1985 /* sanity check */
1986 if (!serial)
1987 return;
1988
1989 spin_lock(&serial->serial_lock);
1990 serial->tx_urb_used = 0;
1991 spin_unlock(&serial->serial_lock);
1992 if (status) {
1993 handle_usb_error(status, __func__, serial->parent);
1994 return;
1995 }
1996
1997 /* what request? */
1998 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1999 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2000 D4("Actual length of urb = %d\n", urb->actual_length);
2001 DUMP1(urb->transfer_buffer, urb->actual_length);
2002
2003 if (req->bRequestType ==
2004 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2005 /* response to a read command */
2006 serial->rx_urb_filled[0] = 1;
2007 spin_lock(&serial->serial_lock);
2008 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2009 spin_unlock(&serial->serial_lock);
2010 } else {
2011 struct tty_struct *tty = tty_port_tty_get(&serial->port);
2012 hso_put_activity(serial->parent);
2013 if (tty) {
2014 tty_wakeup(tty);
2015 tty_kref_put(tty);
2016 }
2017 /* response to a write command */
2018 hso_kick_transmit(serial);
2019 }
2020 }
2021
2022 /* handle RX data for serial port */
2023 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2024 {
2025 struct tty_struct *tty;
2026 int write_length_remaining = 0;
2027 int curr_write_len;
2028
2029 /* Sanity check */
2030 if (urb == NULL || serial == NULL) {
2031 D1("serial = NULL");
2032 return -2;
2033 }
2034
2035 tty = tty_port_tty_get(&serial->port);
2036
2037 /* Push data to tty */
2038 if (tty) {
2039 write_length_remaining = urb->actual_length -
2040 serial->curr_rx_urb_offset;
2041 D1("data to push to tty");
2042 while (write_length_remaining) {
2043 if (test_bit(TTY_THROTTLED, &tty->flags)) {
2044 tty_kref_put(tty);
2045 return -1;
2046 }
2047 curr_write_len = tty_insert_flip_string
2048 (tty, urb->transfer_buffer +
2049 serial->curr_rx_urb_offset,
2050 write_length_remaining);
2051 serial->curr_rx_urb_offset += curr_write_len;
2052 write_length_remaining -= curr_write_len;
2053 tty_flip_buffer_push(tty);
2054 }
2055 tty_kref_put(tty);
2056 }
2057 if (write_length_remaining == 0) {
2058 serial->curr_rx_urb_offset = 0;
2059 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2060 }
2061 return write_length_remaining;
2062 }
2063
2064
2065 /* Base driver functions */
2066
2067 static void hso_log_port(struct hso_device *hso_dev)
2068 {
2069 char *port_type;
2070 char port_dev[20];
2071
2072 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2073 case HSO_PORT_CONTROL:
2074 port_type = "Control";
2075 break;
2076 case HSO_PORT_APP:
2077 port_type = "Application";
2078 break;
2079 case HSO_PORT_GPS:
2080 port_type = "GPS";
2081 break;
2082 case HSO_PORT_GPS_CONTROL:
2083 port_type = "GPS control";
2084 break;
2085 case HSO_PORT_APP2:
2086 port_type = "Application2";
2087 break;
2088 case HSO_PORT_PCSC:
2089 port_type = "PCSC";
2090 break;
2091 case HSO_PORT_DIAG:
2092 port_type = "Diagnostic";
2093 break;
2094 case HSO_PORT_DIAG2:
2095 port_type = "Diagnostic2";
2096 break;
2097 case HSO_PORT_MODEM:
2098 port_type = "Modem";
2099 break;
2100 case HSO_PORT_NETWORK:
2101 port_type = "Network";
2102 break;
2103 default:
2104 port_type = "Unknown";
2105 break;
2106 }
2107 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2108 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2109 } else
2110 sprintf(port_dev, "/dev/%s%d", tty_filename,
2111 dev2ser(hso_dev)->minor);
2112
2113 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2114 port_type, port_dev);
2115 }
2116
2117 static int hso_start_net_device(struct hso_device *hso_dev)
2118 {
2119 int i, result = 0;
2120 struct hso_net *hso_net = dev2net(hso_dev);
2121
2122 if (!hso_net)
2123 return -ENODEV;
2124
2125 /* send URBs for all read buffers */
2126 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2127
2128 /* Prep a receive URB */
2129 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2130 hso_dev->usb,
2131 usb_rcvbulkpipe(hso_dev->usb,
2132 hso_net->in_endp->
2133 bEndpointAddress & 0x7F),
2134 hso_net->mux_bulk_rx_buf_pool[i],
2135 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2136 hso_net);
2137
2138 /* Put it out there so the device can send us stuff */
2139 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2140 GFP_NOIO);
2141 if (result)
2142 dev_warn(&hso_dev->usb->dev,
2143 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2144 i, result);
2145 }
2146
2147 return result;
2148 }
2149
2150 static int hso_stop_net_device(struct hso_device *hso_dev)
2151 {
2152 int i;
2153 struct hso_net *hso_net = dev2net(hso_dev);
2154
2155 if (!hso_net)
2156 return -ENODEV;
2157
2158 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2159 if (hso_net->mux_bulk_rx_urb_pool[i])
2160 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2161
2162 }
2163 if (hso_net->mux_bulk_tx_urb)
2164 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2165
2166 return 0;
2167 }
2168
2169 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2170 {
2171 int i, result = 0;
2172 struct hso_serial *serial = dev2ser(hso_dev);
2173
2174 if (!serial)
2175 return -ENODEV;
2176
2177 /* If it is not the MUX port fill in and submit a bulk urb (already
2178 * allocated in hso_serial_start) */
2179 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2180 for (i = 0; i < serial->num_rx_urbs; i++) {
2181 usb_fill_bulk_urb(serial->rx_urb[i],
2182 serial->parent->usb,
2183 usb_rcvbulkpipe(serial->parent->usb,
2184 serial->in_endp->
2185 bEndpointAddress &
2186 0x7F),
2187 serial->rx_data[i],
2188 serial->rx_data_length,
2189 hso_std_serial_read_bulk_callback,
2190 serial);
2191 result = usb_submit_urb(serial->rx_urb[i], flags);
2192 if (result) {
2193 dev_warn(&serial->parent->usb->dev,
2194 "Failed to submit urb - res %d\n",
2195 result);
2196 break;
2197 }
2198 }
2199 } else {
2200 mutex_lock(&serial->shared_int->shared_int_lock);
2201 if (!serial->shared_int->use_count) {
2202 result =
2203 hso_mux_submit_intr_urb(serial->shared_int,
2204 hso_dev->usb, flags);
2205 }
2206 serial->shared_int->use_count++;
2207 mutex_unlock(&serial->shared_int->shared_int_lock);
2208 }
2209 if (serial->tiocmget)
2210 tiocmget_submit_urb(serial,
2211 serial->tiocmget,
2212 serial->parent->usb);
2213 return result;
2214 }
2215
2216 static int hso_stop_serial_device(struct hso_device *hso_dev)
2217 {
2218 int i;
2219 struct hso_serial *serial = dev2ser(hso_dev);
2220 struct hso_tiocmget *tiocmget;
2221
2222 if (!serial)
2223 return -ENODEV;
2224
2225 for (i = 0; i < serial->num_rx_urbs; i++) {
2226 if (serial->rx_urb[i]) {
2227 usb_kill_urb(serial->rx_urb[i]);
2228 serial->rx_urb_filled[i] = 0;
2229 }
2230 }
2231 serial->curr_rx_urb_idx = 0;
2232 serial->curr_rx_urb_offset = 0;
2233
2234 if (serial->tx_urb)
2235 usb_kill_urb(serial->tx_urb);
2236
2237 if (serial->shared_int) {
2238 mutex_lock(&serial->shared_int->shared_int_lock);
2239 if (serial->shared_int->use_count &&
2240 (--serial->shared_int->use_count == 0)) {
2241 struct urb *urb;
2242
2243 urb = serial->shared_int->shared_intr_urb;
2244 if (urb)
2245 usb_kill_urb(urb);
2246 }
2247 mutex_unlock(&serial->shared_int->shared_int_lock);
2248 }
2249 tiocmget = serial->tiocmget;
2250 if (tiocmget) {
2251 wake_up_interruptible(&tiocmget->waitq);
2252 usb_kill_urb(tiocmget->urb);
2253 }
2254
2255 return 0;
2256 }
2257
2258 static void hso_serial_common_free(struct hso_serial *serial)
2259 {
2260 int i;
2261
2262 if (serial->parent->dev)
2263 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2264
2265 tty_unregister_device(tty_drv, serial->minor);
2266
2267 for (i = 0; i < serial->num_rx_urbs; i++) {
2268 /* unlink and free RX URB */
2269 usb_free_urb(serial->rx_urb[i]);
2270 /* free the RX buffer */
2271 kfree(serial->rx_data[i]);
2272 }
2273
2274 /* unlink and free TX URB */
2275 usb_free_urb(serial->tx_urb);
2276 kfree(serial->tx_data);
2277 }
2278
2279 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2280 int rx_size, int tx_size)
2281 {
2282 struct device *dev;
2283 int minor;
2284 int i;
2285
2286 minor = get_free_serial_index();
2287 if (minor < 0)
2288 goto exit;
2289
2290 tty_port_init(&serial->port);
2291
2292 /* register our minor number */
2293 serial->parent->dev = tty_port_register_device(&serial->port, tty_drv,
2294 minor, &serial->parent->interface->dev);
2295 dev = serial->parent->dev;
2296 dev_set_drvdata(dev, serial->parent);
2297 i = device_create_file(dev, &dev_attr_hsotype);
2298
2299 /* fill in specific data for later use */
2300 serial->minor = minor;
2301 serial->magic = HSO_SERIAL_MAGIC;
2302 spin_lock_init(&serial->serial_lock);
2303 serial->num_rx_urbs = num_urbs;
2304
2305 /* RX, allocate urb and initialize */
2306
2307 /* prepare our RX buffer */
2308 serial->rx_data_length = rx_size;
2309 for (i = 0; i < serial->num_rx_urbs; i++) {
2310 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2311 if (!serial->rx_urb[i]) {
2312 dev_err(dev, "Could not allocate urb?\n");
2313 goto exit;
2314 }
2315 serial->rx_urb[i]->transfer_buffer = NULL;
2316 serial->rx_urb[i]->transfer_buffer_length = 0;
2317 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2318 GFP_KERNEL);
2319 if (!serial->rx_data[i]) {
2320 dev_err(dev, "%s - Out of memory\n", __func__);
2321 goto exit;
2322 }
2323 }
2324
2325 /* TX, allocate urb and initialize */
2326 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2327 if (!serial->tx_urb) {
2328 dev_err(dev, "Could not allocate urb?\n");
2329 goto exit;
2330 }
2331 serial->tx_urb->transfer_buffer = NULL;
2332 serial->tx_urb->transfer_buffer_length = 0;
2333 /* prepare our TX buffer */
2334 serial->tx_data_count = 0;
2335 serial->tx_buffer_count = 0;
2336 serial->tx_data_length = tx_size;
2337 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2338 if (!serial->tx_data) {
2339 dev_err(dev, "%s - Out of memory\n", __func__);
2340 goto exit;
2341 }
2342 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2343 if (!serial->tx_buffer) {
2344 dev_err(dev, "%s - Out of memory\n", __func__);
2345 goto exit;
2346 }
2347
2348 return 0;
2349 exit:
2350 hso_serial_common_free(serial);
2351 return -1;
2352 }
2353
2354 /* Creates a general hso device */
2355 static struct hso_device *hso_create_device(struct usb_interface *intf,
2356 int port_spec)
2357 {
2358 struct hso_device *hso_dev;
2359
2360 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2361 if (!hso_dev)
2362 return NULL;
2363
2364 hso_dev->port_spec = port_spec;
2365 hso_dev->usb = interface_to_usbdev(intf);
2366 hso_dev->interface = intf;
2367 kref_init(&hso_dev->ref);
2368 mutex_init(&hso_dev->mutex);
2369
2370 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2371 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2372 INIT_WORK(&hso_dev->reset_device, reset_device);
2373
2374 return hso_dev;
2375 }
2376
2377 /* Removes a network device in the network device table */
2378 static int remove_net_device(struct hso_device *hso_dev)
2379 {
2380 int i;
2381
2382 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2383 if (network_table[i] == hso_dev) {
2384 network_table[i] = NULL;
2385 break;
2386 }
2387 }
2388 if (i == HSO_MAX_NET_DEVICES)
2389 return -1;
2390 return 0;
2391 }
2392
2393 /* Frees our network device */
2394 static void hso_free_net_device(struct hso_device *hso_dev)
2395 {
2396 int i;
2397 struct hso_net *hso_net = dev2net(hso_dev);
2398
2399 if (!hso_net)
2400 return;
2401
2402 remove_net_device(hso_net->parent);
2403
2404 if (hso_net->net)
2405 unregister_netdev(hso_net->net);
2406
2407 /* start freeing */
2408 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2409 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2410 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2411 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2412 }
2413 usb_free_urb(hso_net->mux_bulk_tx_urb);
2414 kfree(hso_net->mux_bulk_tx_buf);
2415 hso_net->mux_bulk_tx_buf = NULL;
2416
2417 if (hso_net->net)
2418 free_netdev(hso_net->net);
2419
2420 kfree(hso_dev);
2421 }
2422
2423 static const struct net_device_ops hso_netdev_ops = {
2424 .ndo_open = hso_net_open,
2425 .ndo_stop = hso_net_close,
2426 .ndo_start_xmit = hso_net_start_xmit,
2427 .ndo_tx_timeout = hso_net_tx_timeout,
2428 };
2429
2430 /* initialize the network interface */
2431 static void hso_net_init(struct net_device *net)
2432 {
2433 struct hso_net *hso_net = netdev_priv(net);
2434
2435 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2436
2437 /* fill in the other fields */
2438 net->netdev_ops = &hso_netdev_ops;
2439 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2440 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2441 net->type = ARPHRD_NONE;
2442 net->mtu = DEFAULT_MTU - 14;
2443 net->tx_queue_len = 10;
2444 SET_ETHTOOL_OPS(net, &ops);
2445
2446 /* and initialize the semaphore */
2447 spin_lock_init(&hso_net->net_lock);
2448 }
2449
2450 /* Adds a network device in the network device table */
2451 static int add_net_device(struct hso_device *hso_dev)
2452 {
2453 int i;
2454
2455 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2456 if (network_table[i] == NULL) {
2457 network_table[i] = hso_dev;
2458 break;
2459 }
2460 }
2461 if (i == HSO_MAX_NET_DEVICES)
2462 return -1;
2463 return 0;
2464 }
2465
2466 static int hso_rfkill_set_block(void *data, bool blocked)
2467 {
2468 struct hso_device *hso_dev = data;
2469 int enabled = !blocked;
2470 int rv;
2471
2472 mutex_lock(&hso_dev->mutex);
2473 if (hso_dev->usb_gone)
2474 rv = 0;
2475 else
2476 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2477 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2478 USB_CTRL_SET_TIMEOUT);
2479 mutex_unlock(&hso_dev->mutex);
2480 return rv;
2481 }
2482
2483 static const struct rfkill_ops hso_rfkill_ops = {
2484 .set_block = hso_rfkill_set_block,
2485 };
2486
2487 /* Creates and sets up everything for rfkill */
2488 static void hso_create_rfkill(struct hso_device *hso_dev,
2489 struct usb_interface *interface)
2490 {
2491 struct hso_net *hso_net = dev2net(hso_dev);
2492 struct device *dev = &hso_net->net->dev;
2493 char *rfkn;
2494
2495 rfkn = kzalloc(20, GFP_KERNEL);
2496 if (!rfkn)
2497 dev_err(dev, "%s - Out of memory\n", __func__);
2498
2499 snprintf(rfkn, 20, "hso-%d",
2500 interface->altsetting->desc.bInterfaceNumber);
2501
2502 hso_net->rfkill = rfkill_alloc(rfkn,
2503 &interface_to_usbdev(interface)->dev,
2504 RFKILL_TYPE_WWAN,
2505 &hso_rfkill_ops, hso_dev);
2506 if (!hso_net->rfkill) {
2507 dev_err(dev, "%s - Out of memory\n", __func__);
2508 kfree(rfkn);
2509 return;
2510 }
2511 if (rfkill_register(hso_net->rfkill) < 0) {
2512 rfkill_destroy(hso_net->rfkill);
2513 kfree(rfkn);
2514 hso_net->rfkill = NULL;
2515 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2516 return;
2517 }
2518 }
2519
2520 static struct device_type hso_type = {
2521 .name = "wwan",
2522 };
2523
2524 /* Creates our network device */
2525 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2526 int port_spec)
2527 {
2528 int result, i;
2529 struct net_device *net;
2530 struct hso_net *hso_net;
2531 struct hso_device *hso_dev;
2532
2533 hso_dev = hso_create_device(interface, port_spec);
2534 if (!hso_dev)
2535 return NULL;
2536
2537 /* allocate our network device, then we can put in our private data */
2538 /* call hso_net_init to do the basic initialization */
2539 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2540 if (!net) {
2541 dev_err(&interface->dev, "Unable to create ethernet device\n");
2542 goto exit;
2543 }
2544
2545 hso_net = netdev_priv(net);
2546
2547 hso_dev->port_data.dev_net = hso_net;
2548 hso_net->net = net;
2549 hso_net->parent = hso_dev;
2550
2551 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2552 USB_DIR_IN);
2553 if (!hso_net->in_endp) {
2554 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2555 goto exit;
2556 }
2557 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2558 USB_DIR_OUT);
2559 if (!hso_net->out_endp) {
2560 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2561 goto exit;
2562 }
2563 SET_NETDEV_DEV(net, &interface->dev);
2564 SET_NETDEV_DEVTYPE(net, &hso_type);
2565
2566 /* registering our net device */
2567 result = register_netdev(net);
2568 if (result) {
2569 dev_err(&interface->dev, "Failed to register device\n");
2570 goto exit;
2571 }
2572
2573 /* start allocating */
2574 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2575 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2576 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2577 dev_err(&interface->dev, "Could not allocate rx urb\n");
2578 goto exit;
2579 }
2580 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2581 GFP_KERNEL);
2582 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2583 dev_err(&interface->dev, "Could not allocate rx buf\n");
2584 goto exit;
2585 }
2586 }
2587 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2588 if (!hso_net->mux_bulk_tx_urb) {
2589 dev_err(&interface->dev, "Could not allocate tx urb\n");
2590 goto exit;
2591 }
2592 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2593 if (!hso_net->mux_bulk_tx_buf) {
2594 dev_err(&interface->dev, "Could not allocate tx buf\n");
2595 goto exit;
2596 }
2597
2598 add_net_device(hso_dev);
2599
2600 hso_log_port(hso_dev);
2601
2602 hso_create_rfkill(hso_dev, interface);
2603
2604 return hso_dev;
2605 exit:
2606 hso_free_net_device(hso_dev);
2607 return NULL;
2608 }
2609
2610 static void hso_free_tiomget(struct hso_serial *serial)
2611 {
2612 struct hso_tiocmget *tiocmget;
2613 if (!serial)
2614 return;
2615 tiocmget = serial->tiocmget;
2616 if (tiocmget) {
2617 usb_free_urb(tiocmget->urb);
2618 tiocmget->urb = NULL;
2619 serial->tiocmget = NULL;
2620 kfree(tiocmget);
2621 }
2622 }
2623
2624 /* Frees an AT channel ( goes for both mux and non-mux ) */
2625 static void hso_free_serial_device(struct hso_device *hso_dev)
2626 {
2627 struct hso_serial *serial = dev2ser(hso_dev);
2628
2629 if (!serial)
2630 return;
2631 set_serial_by_index(serial->minor, NULL);
2632
2633 hso_serial_common_free(serial);
2634
2635 if (serial->shared_int) {
2636 mutex_lock(&serial->shared_int->shared_int_lock);
2637 if (--serial->shared_int->ref_count == 0)
2638 hso_free_shared_int(serial->shared_int);
2639 else
2640 mutex_unlock(&serial->shared_int->shared_int_lock);
2641 }
2642 hso_free_tiomget(serial);
2643 kfree(serial);
2644 kfree(hso_dev);
2645 }
2646
2647 /* Creates a bulk AT channel */
2648 static struct hso_device *hso_create_bulk_serial_device(
2649 struct usb_interface *interface, int port)
2650 {
2651 struct hso_device *hso_dev;
2652 struct hso_serial *serial;
2653 int num_urbs;
2654 struct hso_tiocmget *tiocmget;
2655
2656 hso_dev = hso_create_device(interface, port);
2657 if (!hso_dev)
2658 return NULL;
2659
2660 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2661 if (!serial)
2662 goto exit;
2663
2664 serial->parent = hso_dev;
2665 hso_dev->port_data.dev_serial = serial;
2666
2667 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2668 num_urbs = 2;
2669 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2670 GFP_KERNEL);
2671 /* it isn't going to break our heart if serial->tiocmget
2672 * allocation fails don't bother checking this.
2673 */
2674 if (serial->tiocmget) {
2675 tiocmget = serial->tiocmget;
2676 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2677 if (tiocmget->urb) {
2678 mutex_init(&tiocmget->mutex);
2679 init_waitqueue_head(&tiocmget->waitq);
2680 tiocmget->endp = hso_get_ep(
2681 interface,
2682 USB_ENDPOINT_XFER_INT,
2683 USB_DIR_IN);
2684 } else
2685 hso_free_tiomget(serial);
2686 }
2687 }
2688 else
2689 num_urbs = 1;
2690
2691 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2692 BULK_URB_TX_SIZE))
2693 goto exit;
2694
2695 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2696 USB_DIR_IN);
2697 if (!serial->in_endp) {
2698 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2699 goto exit2;
2700 }
2701
2702 if (!
2703 (serial->out_endp =
2704 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2705 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2706 goto exit2;
2707 }
2708
2709 serial->write_data = hso_std_serial_write_data;
2710
2711 /* and record this serial */
2712 set_serial_by_index(serial->minor, serial);
2713
2714 /* setup the proc dirs and files if needed */
2715 hso_log_port(hso_dev);
2716
2717 /* done, return it */
2718 return hso_dev;
2719
2720 exit2:
2721 hso_serial_common_free(serial);
2722 exit:
2723 hso_free_tiomget(serial);
2724 kfree(serial);
2725 kfree(hso_dev);
2726 return NULL;
2727 }
2728
2729 /* Creates a multiplexed AT channel */
2730 static
2731 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2732 int port,
2733 struct hso_shared_int *mux)
2734 {
2735 struct hso_device *hso_dev;
2736 struct hso_serial *serial;
2737 int port_spec;
2738
2739 port_spec = HSO_INTF_MUX;
2740 port_spec &= ~HSO_PORT_MASK;
2741
2742 port_spec |= hso_mux_to_port(port);
2743 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2744 return NULL;
2745
2746 hso_dev = hso_create_device(interface, port_spec);
2747 if (!hso_dev)
2748 return NULL;
2749
2750 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2751 if (!serial)
2752 goto exit;
2753
2754 hso_dev->port_data.dev_serial = serial;
2755 serial->parent = hso_dev;
2756
2757 if (hso_serial_common_create
2758 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2759 goto exit;
2760
2761 serial->tx_data_length--;
2762 serial->write_data = hso_mux_serial_write_data;
2763
2764 serial->shared_int = mux;
2765 mutex_lock(&serial->shared_int->shared_int_lock);
2766 serial->shared_int->ref_count++;
2767 mutex_unlock(&serial->shared_int->shared_int_lock);
2768
2769 /* and record this serial */
2770 set_serial_by_index(serial->minor, serial);
2771
2772 /* setup the proc dirs and files if needed */
2773 hso_log_port(hso_dev);
2774
2775 /* done, return it */
2776 return hso_dev;
2777
2778 exit:
2779 if (serial) {
2780 tty_unregister_device(tty_drv, serial->minor);
2781 kfree(serial);
2782 }
2783 if (hso_dev)
2784 kfree(hso_dev);
2785 return NULL;
2786
2787 }
2788
2789 static void hso_free_shared_int(struct hso_shared_int *mux)
2790 {
2791 usb_free_urb(mux->shared_intr_urb);
2792 kfree(mux->shared_intr_buf);
2793 mutex_unlock(&mux->shared_int_lock);
2794 kfree(mux);
2795 }
2796
2797 static
2798 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2799 {
2800 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2801
2802 if (!mux)
2803 return NULL;
2804
2805 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2806 USB_DIR_IN);
2807 if (!mux->intr_endp) {
2808 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2809 goto exit;
2810 }
2811
2812 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2813 if (!mux->shared_intr_urb) {
2814 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2815 goto exit;
2816 }
2817 mux->shared_intr_buf =
2818 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2819 GFP_KERNEL);
2820 if (!mux->shared_intr_buf) {
2821 dev_err(&interface->dev, "Could not allocate intr buf?\n");
2822 goto exit;
2823 }
2824
2825 mutex_init(&mux->shared_int_lock);
2826
2827 return mux;
2828
2829 exit:
2830 kfree(mux->shared_intr_buf);
2831 usb_free_urb(mux->shared_intr_urb);
2832 kfree(mux);
2833 return NULL;
2834 }
2835
2836 /* Gets the port spec for a certain interface */
2837 static int hso_get_config_data(struct usb_interface *interface)
2838 {
2839 struct usb_device *usbdev = interface_to_usbdev(interface);
2840 u8 config_data[17];
2841 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2842 s32 result;
2843
2844 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2845 0x86, 0xC0, 0, 0, config_data, 17,
2846 USB_CTRL_SET_TIMEOUT) != 0x11) {
2847 return -EIO;
2848 }
2849
2850 switch (config_data[if_num]) {
2851 case 0x0:
2852 result = 0;
2853 break;
2854 case 0x1:
2855 result = HSO_PORT_DIAG;
2856 break;
2857 case 0x2:
2858 result = HSO_PORT_GPS;
2859 break;
2860 case 0x3:
2861 result = HSO_PORT_GPS_CONTROL;
2862 break;
2863 case 0x4:
2864 result = HSO_PORT_APP;
2865 break;
2866 case 0x5:
2867 result = HSO_PORT_APP2;
2868 break;
2869 case 0x6:
2870 result = HSO_PORT_CONTROL;
2871 break;
2872 case 0x7:
2873 result = HSO_PORT_NETWORK;
2874 break;
2875 case 0x8:
2876 result = HSO_PORT_MODEM;
2877 break;
2878 case 0x9:
2879 result = HSO_PORT_MSD;
2880 break;
2881 case 0xa:
2882 result = HSO_PORT_PCSC;
2883 break;
2884 case 0xb:
2885 result = HSO_PORT_VOICE;
2886 break;
2887 default:
2888 result = 0;
2889 }
2890
2891 if (result)
2892 result |= HSO_INTF_BULK;
2893
2894 if (config_data[16] & 0x1)
2895 result |= HSO_INFO_CRC_BUG;
2896
2897 return result;
2898 }
2899
2900 /* called once for each interface upon device insertion */
2901 static int hso_probe(struct usb_interface *interface,
2902 const struct usb_device_id *id)
2903 {
2904 int mux, i, if_num, port_spec;
2905 unsigned char port_mask;
2906 struct hso_device *hso_dev = NULL;
2907 struct hso_shared_int *shared_int;
2908 struct hso_device *tmp_dev = NULL;
2909
2910 if_num = interface->altsetting->desc.bInterfaceNumber;
2911
2912 /* Get the interface/port specification from either driver_info or from
2913 * the device itself */
2914 if (id->driver_info)
2915 port_spec = ((u32 *)(id->driver_info))[if_num];
2916 else
2917 port_spec = hso_get_config_data(interface);
2918
2919 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2920 dev_err(&interface->dev, "Not our interface\n");
2921 return -ENODEV;
2922 }
2923 /* Check if we need to switch to alt interfaces prior to port
2924 * configuration */
2925 if (interface->num_altsetting > 1)
2926 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2927 interface->needs_remote_wakeup = 1;
2928
2929 /* Allocate new hso device(s) */
2930 switch (port_spec & HSO_INTF_MASK) {
2931 case HSO_INTF_MUX:
2932 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2933 /* Create the network device */
2934 if (!disable_net) {
2935 hso_dev = hso_create_net_device(interface,
2936 port_spec);
2937 if (!hso_dev)
2938 goto exit;
2939 tmp_dev = hso_dev;
2940 }
2941 }
2942
2943 if (hso_get_mux_ports(interface, &port_mask))
2944 /* TODO: de-allocate everything */
2945 goto exit;
2946
2947 shared_int = hso_create_shared_int(interface);
2948 if (!shared_int)
2949 goto exit;
2950
2951 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2952 if (port_mask & i) {
2953 hso_dev = hso_create_mux_serial_device(
2954 interface, i, shared_int);
2955 if (!hso_dev)
2956 goto exit;
2957 }
2958 }
2959
2960 if (tmp_dev)
2961 hso_dev = tmp_dev;
2962 break;
2963
2964 case HSO_INTF_BULK:
2965 /* It's a regular bulk interface */
2966 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2967 if (!disable_net)
2968 hso_dev =
2969 hso_create_net_device(interface, port_spec);
2970 } else {
2971 hso_dev =
2972 hso_create_bulk_serial_device(interface, port_spec);
2973 }
2974 if (!hso_dev)
2975 goto exit;
2976 break;
2977 default:
2978 goto exit;
2979 }
2980
2981 /* save our data pointer in this device */
2982 usb_set_intfdata(interface, hso_dev);
2983
2984 /* done */
2985 return 0;
2986 exit:
2987 hso_free_interface(interface);
2988 return -ENODEV;
2989 }
2990
2991 /* device removed, cleaning up */
2992 static void hso_disconnect(struct usb_interface *interface)
2993 {
2994 hso_free_interface(interface);
2995
2996 /* remove reference of our private data */
2997 usb_set_intfdata(interface, NULL);
2998 }
2999
3000 static void async_get_intf(struct work_struct *data)
3001 {
3002 struct hso_device *hso_dev =
3003 container_of(data, struct hso_device, async_get_intf);
3004 usb_autopm_get_interface(hso_dev->interface);
3005 }
3006
3007 static void async_put_intf(struct work_struct *data)
3008 {
3009 struct hso_device *hso_dev =
3010 container_of(data, struct hso_device, async_put_intf);
3011 usb_autopm_put_interface(hso_dev->interface);
3012 }
3013
3014 static int hso_get_activity(struct hso_device *hso_dev)
3015 {
3016 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3017 if (!hso_dev->is_active) {
3018 hso_dev->is_active = 1;
3019 schedule_work(&hso_dev->async_get_intf);
3020 }
3021 }
3022
3023 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3024 return -EAGAIN;
3025
3026 usb_mark_last_busy(hso_dev->usb);
3027
3028 return 0;
3029 }
3030
3031 static int hso_put_activity(struct hso_device *hso_dev)
3032 {
3033 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3034 if (hso_dev->is_active) {
3035 hso_dev->is_active = 0;
3036 schedule_work(&hso_dev->async_put_intf);
3037 return -EAGAIN;
3038 }
3039 }
3040 hso_dev->is_active = 0;
3041 return 0;
3042 }
3043
3044 /* called by kernel when we need to suspend device */
3045 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3046 {
3047 int i, result;
3048
3049 /* Stop all serial ports */
3050 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3051 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3052 result = hso_stop_serial_device(serial_table[i]);
3053 if (result)
3054 goto out;
3055 }
3056 }
3057
3058 /* Stop all network ports */
3059 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3060 if (network_table[i] &&
3061 (network_table[i]->interface == iface)) {
3062 result = hso_stop_net_device(network_table[i]);
3063 if (result)
3064 goto out;
3065 }
3066 }
3067
3068 out:
3069 return 0;
3070 }
3071
3072 /* called by kernel when we need to resume device */
3073 static int hso_resume(struct usb_interface *iface)
3074 {
3075 int i, result = 0;
3076 struct hso_net *hso_net;
3077
3078 /* Start all serial ports */
3079 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3080 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3081 if (dev2ser(serial_table[i])->port.count) {
3082 result =
3083 hso_start_serial_device(serial_table[i], GFP_NOIO);
3084 hso_kick_transmit(dev2ser(serial_table[i]));
3085 if (result)
3086 goto out;
3087 }
3088 }
3089 }
3090
3091 /* Start all network ports */
3092 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3093 if (network_table[i] &&
3094 (network_table[i]->interface == iface)) {
3095 hso_net = dev2net(network_table[i]);
3096 if (hso_net->flags & IFF_UP) {
3097 /* First transmit any lingering data,
3098 then restart the device. */
3099 if (hso_net->skb_tx_buf) {
3100 dev_dbg(&iface->dev,
3101 "Transmitting"
3102 " lingering data\n");
3103 hso_net_start_xmit(hso_net->skb_tx_buf,
3104 hso_net->net);
3105 hso_net->skb_tx_buf = NULL;
3106 }
3107 result = hso_start_net_device(network_table[i]);
3108 if (result)
3109 goto out;
3110 }
3111 }
3112 }
3113
3114 out:
3115 return result;
3116 }
3117
3118 static void reset_device(struct work_struct *data)
3119 {
3120 struct hso_device *hso_dev =
3121 container_of(data, struct hso_device, reset_device);
3122 struct usb_device *usb = hso_dev->usb;
3123 int result;
3124
3125 if (hso_dev->usb_gone) {
3126 D1("No reset during disconnect\n");
3127 } else {
3128 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3129 if (result < 0)
3130 D1("unable to lock device for reset: %d\n", result);
3131 else {
3132 usb_reset_device(usb);
3133 usb_unlock_device(usb);
3134 }
3135 }
3136 }
3137
3138 static void hso_serial_ref_free(struct kref *ref)
3139 {
3140 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3141
3142 hso_free_serial_device(hso_dev);
3143 }
3144
3145 static void hso_free_interface(struct usb_interface *interface)
3146 {
3147 struct hso_serial *hso_dev;
3148 struct tty_struct *tty;
3149 int i;
3150
3151 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3152 if (serial_table[i] &&
3153 (serial_table[i]->interface == interface)) {
3154 hso_dev = dev2ser(serial_table[i]);
3155 tty = tty_port_tty_get(&hso_dev->port);
3156 if (tty) {
3157 tty_hangup(tty);
3158 tty_kref_put(tty);
3159 }
3160 mutex_lock(&hso_dev->parent->mutex);
3161 hso_dev->parent->usb_gone = 1;
3162 mutex_unlock(&hso_dev->parent->mutex);
3163 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3164 }
3165 }
3166
3167 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3168 if (network_table[i] &&
3169 (network_table[i]->interface == interface)) {
3170 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3171 /* hso_stop_net_device doesn't stop the net queue since
3172 * traffic needs to start it again when suspended */
3173 netif_stop_queue(dev2net(network_table[i])->net);
3174 hso_stop_net_device(network_table[i]);
3175 cancel_work_sync(&network_table[i]->async_put_intf);
3176 cancel_work_sync(&network_table[i]->async_get_intf);
3177 if (rfk) {
3178 rfkill_unregister(rfk);
3179 rfkill_destroy(rfk);
3180 }
3181 hso_free_net_device(network_table[i]);
3182 }
3183 }
3184 }
3185
3186 /* Helper functions */
3187
3188 /* Get the endpoint ! */
3189 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3190 int type, int dir)
3191 {
3192 int i;
3193 struct usb_host_interface *iface = intf->cur_altsetting;
3194 struct usb_endpoint_descriptor *endp;
3195
3196 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3197 endp = &iface->endpoint[i].desc;
3198 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3199 (usb_endpoint_type(endp) == type))
3200 return endp;
3201 }
3202
3203 return NULL;
3204 }
3205
3206 /* Get the byte that describes which ports are enabled */
3207 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3208 {
3209 int i;
3210 struct usb_host_interface *iface = intf->cur_altsetting;
3211
3212 if (iface->extralen == 3) {
3213 *ports = iface->extra[2];
3214 return 0;
3215 }
3216
3217 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3218 if (iface->endpoint[i].extralen == 3) {
3219 *ports = iface->endpoint[i].extra[2];
3220 return 0;
3221 }
3222 }
3223
3224 return -1;
3225 }
3226
3227 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3228 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3229 struct usb_device *usb, gfp_t gfp)
3230 {
3231 int result;
3232
3233 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3234 usb_rcvintpipe(usb,
3235 shared_int->intr_endp->bEndpointAddress & 0x7F),
3236 shared_int->shared_intr_buf,
3237 1,
3238 intr_callback, shared_int,
3239 shared_int->intr_endp->bInterval);
3240
3241 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3242 if (result)
3243 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3244 result);
3245
3246 return result;
3247 }
3248
3249 /* operations setup of the serial interface */
3250 static const struct tty_operations hso_serial_ops = {
3251 .open = hso_serial_open,
3252 .close = hso_serial_close,
3253 .write = hso_serial_write,
3254 .write_room = hso_serial_write_room,
3255 .ioctl = hso_serial_ioctl,
3256 .set_termios = hso_serial_set_termios,
3257 .chars_in_buffer = hso_serial_chars_in_buffer,
3258 .tiocmget = hso_serial_tiocmget,
3259 .tiocmset = hso_serial_tiocmset,
3260 .get_icount = hso_get_count,
3261 .unthrottle = hso_unthrottle
3262 };
3263
3264 static struct usb_driver hso_driver = {
3265 .name = driver_name,
3266 .probe = hso_probe,
3267 .disconnect = hso_disconnect,
3268 .id_table = hso_ids,
3269 .suspend = hso_suspend,
3270 .resume = hso_resume,
3271 .reset_resume = hso_resume,
3272 .supports_autosuspend = 1,
3273 .disable_hub_initiated_lpm = 1,
3274 };
3275
3276 static int __init hso_init(void)
3277 {
3278 int i;
3279 int result;
3280
3281 /* put it in the log */
3282 printk(KERN_INFO "hso: %s\n", version);
3283
3284 /* Initialise the serial table semaphore and table */
3285 spin_lock_init(&serial_table_lock);
3286 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3287 serial_table[i] = NULL;
3288
3289 /* allocate our driver using the proper amount of supported minors */
3290 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3291 if (!tty_drv)
3292 return -ENOMEM;
3293
3294 /* fill in all needed values */
3295 tty_drv->driver_name = driver_name;
3296 tty_drv->name = tty_filename;
3297
3298 /* if major number is provided as parameter, use that one */
3299 if (tty_major)
3300 tty_drv->major = tty_major;
3301
3302 tty_drv->minor_start = 0;
3303 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3304 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3305 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3306 tty_drv->init_termios = tty_std_termios;
3307 hso_init_termios(&tty_drv->init_termios);
3308 tty_set_operations(tty_drv, &hso_serial_ops);
3309
3310 /* register the tty driver */
3311 result = tty_register_driver(tty_drv);
3312 if (result) {
3313 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3314 __func__, result);
3315 goto err_free_tty;
3316 }
3317
3318 /* register this module as an usb driver */
3319 result = usb_register(&hso_driver);
3320 if (result) {
3321 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3322 result);
3323 goto err_unreg_tty;
3324 }
3325
3326 /* done */
3327 return 0;
3328 err_unreg_tty:
3329 tty_unregister_driver(tty_drv);
3330 err_free_tty:
3331 put_tty_driver(tty_drv);
3332 return result;
3333 }
3334
3335 static void __exit hso_exit(void)
3336 {
3337 printk(KERN_INFO "hso: unloaded\n");
3338
3339 tty_unregister_driver(tty_drv);
3340 put_tty_driver(tty_drv);
3341 /* deregister the usb driver */
3342 usb_deregister(&hso_driver);
3343 }
3344
3345 /* Module definitions */
3346 module_init(hso_init);
3347 module_exit(hso_exit);
3348
3349 MODULE_AUTHOR(MOD_AUTHOR);
3350 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3351 MODULE_LICENSE(MOD_LICENSE);
3352
3353 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3354 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3355 module_param(debug, int, S_IRUGO | S_IWUSR);
3356
3357 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3358 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3359 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3360
3361 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3362 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3363 module_param(disable_net, int, S_IRUGO | S_IWUSR);
Linus' kernel tree