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hso: remove hso_free_device()
[linux-2.6/libata-dev.git] / drivers / net / usb / hso.c
blobf49cc7b50c7e186fe2b34dca289f01ce54f4be5a
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 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
9 * <ajb@spheresystems.co.uk>
10 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
11 * Copyright (C) 2008 Novell, Inc.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
25 * USA
26 *
27 *
28 *****************************************************************************/
29
30 /******************************************************************************
31 *
32 * Description of the device:
33 *
34 * Interface 0: Contains the IP network interface on the bulk end points.
35 * The multiplexed serial ports are using the interrupt and
36 * control endpoints.
37 * Interrupt contains a bitmap telling which multiplexed
38 * serialport needs servicing.
39 *
40 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
41 * port is opened, as this have a huge impact on the network port
42 * throughput.
43 *
44 * Interface 2: Standard modem interface - circuit switched interface, this
45 * can be used to make a standard ppp connection however it
46 * should not be used in conjunction with the IP network interface
47 * enabled for USB performance reasons i.e. if using this set
48 * ideally disable_net=1.
49 *
50 *****************************************************************************/
51
52 #include <linux/sched.h>
53 #include <linux/slab.h>
54 #include <linux/init.h>
55 #include <linux/delay.h>
56 #include <linux/netdevice.h>
57 #include <linux/module.h>
58 #include <linux/ethtool.h>
59 #include <linux/usb.h>
60 #include <linux/timer.h>
61 #include <linux/tty.h>
62 #include <linux/tty_driver.h>
63 #include <linux/tty_flip.h>
64 #include <linux/kmod.h>
65 #include <linux/rfkill.h>
66 #include <linux/ip.h>
67 #include <linux/uaccess.h>
68 #include <linux/usb/cdc.h>
69 #include <net/arp.h>
70 #include <asm/byteorder.h>
71 #include <linux/serial_core.h>
72 #include <linux/serial.h>
73
74
75 #define DRIVER_VERSION "1.2"
76 #define MOD_AUTHOR "Option Wireless"
77 #define MOD_DESCRIPTION "USB High Speed Option driver"
78 #define MOD_LICENSE "GPL"
79
80 #define HSO_MAX_NET_DEVICES 10
81 #define HSO__MAX_MTU 2048
82 #define DEFAULT_MTU 1500
83 #define DEFAULT_MRU 1500
84
85 #define CTRL_URB_RX_SIZE 1024
86 #define CTRL_URB_TX_SIZE 64
87
88 #define BULK_URB_RX_SIZE 4096
89 #define BULK_URB_TX_SIZE 8192
90
91 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
92 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
93 #define MUX_BULK_RX_BUF_COUNT 4
94 #define USB_TYPE_OPTION_VENDOR 0x20
95
96 /* These definitions are used with the struct hso_net flags element */
97 /* - use *_bit operations on it. (bit indices not values.) */
98 #define HSO_NET_RUNNING 0
99
100 #define HSO_NET_TX_TIMEOUT (HZ*10)
101
102 #define HSO_SERIAL_MAGIC 0x48534f31
103
104 /* Number of ttys to handle */
105 #define HSO_SERIAL_TTY_MINORS 256
106
107 #define MAX_RX_URBS 2
108
109 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
110 {
111 if (tty)
112 return tty->driver_data;
113 return NULL;
114 }
115
116 /*****************************************************************************/
117 /* Debugging functions */
118 /*****************************************************************************/
119 #define D__(lvl_, fmt, arg...) \
120 do { \
121 printk(lvl_ "[%d:%s]: " fmt "\n", \
122 __LINE__, __func__, ## arg); \
123 } while (0)
124
125 #define D_(lvl, args...) \
126 do { \
127 if (lvl & debug) \
128 D__(KERN_INFO, args); \
129 } while (0)
130
131 #define D1(args...) D_(0x01, ##args)
132 #define D2(args...) D_(0x02, ##args)
133 #define D3(args...) D_(0x04, ##args)
134 #define D4(args...) D_(0x08, ##args)
135 #define D5(args...) D_(0x10, ##args)
136
137 /*****************************************************************************/
138 /* Enumerators */
139 /*****************************************************************************/
140 enum pkt_parse_state {
141 WAIT_IP,
142 WAIT_DATA,
143 WAIT_SYNC
144 };
145
146 /*****************************************************************************/
147 /* Structs */
148 /*****************************************************************************/
149
150 struct hso_shared_int {
151 struct usb_endpoint_descriptor *intr_endp;
152 void *shared_intr_buf;
153 struct urb *shared_intr_urb;
154 struct usb_device *usb;
155 int use_count;
156 int ref_count;
157 struct mutex shared_int_lock;
158 };
159
160 struct hso_net {
161 struct hso_device *parent;
162 struct net_device *net;
163 struct rfkill *rfkill;
164
165 struct usb_endpoint_descriptor *in_endp;
166 struct usb_endpoint_descriptor *out_endp;
167
168 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
169 struct urb *mux_bulk_tx_urb;
170 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
171 void *mux_bulk_tx_buf;
172
173 struct sk_buff *skb_rx_buf;
174 struct sk_buff *skb_tx_buf;
175
176 enum pkt_parse_state rx_parse_state;
177 spinlock_t net_lock;
178
179 unsigned short rx_buf_size;
180 unsigned short rx_buf_missing;
181 struct iphdr rx_ip_hdr;
182
183 unsigned long flags;
184 };
185
186 enum rx_ctrl_state{
187 RX_IDLE,
188 RX_SENT,
189 RX_PENDING
190 };
191
192 #define BM_REQUEST_TYPE (0xa1)
193 #define B_NOTIFICATION (0x20)
194 #define W_VALUE (0x0)
195 #define W_INDEX (0x2)
196 #define W_LENGTH (0x2)
197
198 #define B_OVERRUN (0x1<<6)
199 #define B_PARITY (0x1<<5)
200 #define B_FRAMING (0x1<<4)
201 #define B_RING_SIGNAL (0x1<<3)
202 #define B_BREAK (0x1<<2)
203 #define B_TX_CARRIER (0x1<<1)
204 #define B_RX_CARRIER (0x1<<0)
205
206 struct hso_serial_state_notification {
207 u8 bmRequestType;
208 u8 bNotification;
209 u16 wValue;
210 u16 wIndex;
211 u16 wLength;
212 u16 UART_state_bitmap;
213 } __attribute__((packed));
214
215 struct hso_tiocmget {
216 struct mutex mutex;
217 wait_queue_head_t waitq;
218 int intr_completed;
219 struct usb_endpoint_descriptor *endp;
220 struct urb *urb;
221 struct hso_serial_state_notification serial_state_notification;
222 u16 prev_UART_state_bitmap;
223 struct uart_icount icount;
224 };
225
226
227 struct hso_serial {
228 struct hso_device *parent;
229 int magic;
230 u8 minor;
231
232 struct hso_shared_int *shared_int;
233
234 /* rx/tx urb could be either a bulk urb or a control urb depending
235 on which serial port it is used on. */
236 struct urb *rx_urb[MAX_RX_URBS];
237 u8 num_rx_urbs;
238 u8 *rx_data[MAX_RX_URBS];
239 u16 rx_data_length; /* should contain allocated length */
240
241 struct urb *tx_urb;
242 u8 *tx_data;
243 u8 *tx_buffer;
244 u16 tx_data_length; /* should contain allocated length */
245 u16 tx_data_count;
246 u16 tx_buffer_count;
247 struct usb_ctrlrequest ctrl_req_tx;
248 struct usb_ctrlrequest ctrl_req_rx;
249
250 struct usb_endpoint_descriptor *in_endp;
251 struct usb_endpoint_descriptor *out_endp;
252
253 enum rx_ctrl_state rx_state;
254 u8 rts_state;
255 u8 dtr_state;
256 unsigned tx_urb_used:1;
257
258 /* from usb_serial_port */
259 struct tty_struct *tty;
260 int open_count;
261 spinlock_t serial_lock;
262
263 int (*write_data) (struct hso_serial *serial);
264 struct hso_tiocmget *tiocmget;
265 /* Hacks required to get flow control
266 * working on the serial receive buffers
267 * so as not to drop characters on the floor.
268 */
269 int curr_rx_urb_idx;
270 u16 curr_rx_urb_offset;
271 u8 rx_urb_filled[MAX_RX_URBS];
272 struct tasklet_struct unthrottle_tasklet;
273 struct work_struct retry_unthrottle_workqueue;
274 };
275
276 struct hso_device {
277 union {
278 struct hso_serial *dev_serial;
279 struct hso_net *dev_net;
280 } port_data;
281
282 u32 port_spec;
283
284 u8 is_active;
285 u8 usb_gone;
286 struct work_struct async_get_intf;
287 struct work_struct async_put_intf;
288
289 struct usb_device *usb;
290 struct usb_interface *interface;
291
292 struct device *dev;
293 struct kref ref;
294 struct mutex mutex;
295 };
296
297 /* Type of interface */
298 #define HSO_INTF_MASK 0xFF00
299 #define HSO_INTF_MUX 0x0100
300 #define HSO_INTF_BULK 0x0200
301
302 /* Type of port */
303 #define HSO_PORT_MASK 0xFF
304 #define HSO_PORT_NO_PORT 0x0
305 #define HSO_PORT_CONTROL 0x1
306 #define HSO_PORT_APP 0x2
307 #define HSO_PORT_GPS 0x3
308 #define HSO_PORT_PCSC 0x4
309 #define HSO_PORT_APP2 0x5
310 #define HSO_PORT_GPS_CONTROL 0x6
311 #define HSO_PORT_MSD 0x7
312 #define HSO_PORT_VOICE 0x8
313 #define HSO_PORT_DIAG2 0x9
314 #define HSO_PORT_DIAG 0x10
315 #define HSO_PORT_MODEM 0x11
316 #define HSO_PORT_NETWORK 0x12
317
318 /* Additional device info */
319 #define HSO_INFO_MASK 0xFF000000
320 #define HSO_INFO_CRC_BUG 0x01000000
321
322 /*****************************************************************************/
323 /* Prototypes */
324 /*****************************************************************************/
325 /* Serial driver functions */
326 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
327 unsigned int set, unsigned int clear);
328 static void ctrl_callback(struct urb *urb);
329 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
330 static void hso_kick_transmit(struct hso_serial *serial);
331 /* Helper functions */
332 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
333 struct usb_device *usb, gfp_t gfp);
334 static void log_usb_status(int status, const char *function);
335 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
336 int type, int dir);
337 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
338 static void hso_free_interface(struct usb_interface *intf);
339 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
340 static int hso_stop_serial_device(struct hso_device *hso_dev);
341 static int hso_start_net_device(struct hso_device *hso_dev);
342 static void hso_free_shared_int(struct hso_shared_int *shared_int);
343 static int hso_stop_net_device(struct hso_device *hso_dev);
344 static void hso_serial_ref_free(struct kref *ref);
345 static void hso_std_serial_read_bulk_callback(struct urb *urb);
346 static int hso_mux_serial_read(struct hso_serial *serial);
347 static void async_get_intf(struct work_struct *data);
348 static void async_put_intf(struct work_struct *data);
349 static int hso_put_activity(struct hso_device *hso_dev);
350 static int hso_get_activity(struct hso_device *hso_dev);
351 static void tiocmget_intr_callback(struct urb *urb);
352 /*****************************************************************************/
353 /* Helping functions */
354 /*****************************************************************************/
355
356 /* #define DEBUG */
357
358 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
359 {
360 return hso_dev->port_data.dev_net;
361 }
362
363 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
364 {
365 return hso_dev->port_data.dev_serial;
366 }
367
368 /* Debugging functions */
369 #ifdef DEBUG
370 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
371 unsigned int len)
372 {
373 static char name[255];
374
375 sprintf(name, "hso[%d:%s]", line_count, func_name);
376 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
377 }
378
379 #define DUMP(buf_, len_) \
380 dbg_dump(__LINE__, __func__, buf_, len_)
381
382 #define DUMP1(buf_, len_) \
383 do { \
384 if (0x01 & debug) \
385 DUMP(buf_, len_); \
386 } while (0)
387 #else
388 #define DUMP(buf_, len_)
389 #define DUMP1(buf_, len_)
390 #endif
391
392 /* module parameters */
393 static int debug;
394 static int tty_major;
395 static int disable_net;
396
397 /* driver info */
398 static const char driver_name[] = "hso";
399 static const char tty_filename[] = "ttyHS";
400 static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
401 /* the usb driver itself (registered in hso_init) */
402 static struct usb_driver hso_driver;
403 /* serial structures */
404 static struct tty_driver *tty_drv;
405 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
406 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
407 static spinlock_t serial_table_lock;
408
409 static const s32 default_port_spec[] = {
410 HSO_INTF_MUX | HSO_PORT_NETWORK,
411 HSO_INTF_BULK | HSO_PORT_DIAG,
412 HSO_INTF_BULK | HSO_PORT_MODEM,
413 0
414 };
415
416 static const s32 icon321_port_spec[] = {
417 HSO_INTF_MUX | HSO_PORT_NETWORK,
418 HSO_INTF_BULK | HSO_PORT_DIAG2,
419 HSO_INTF_BULK | HSO_PORT_MODEM,
420 HSO_INTF_BULK | HSO_PORT_DIAG,
421 0
422 };
423
424 #define default_port_device(vendor, product) \
425 USB_DEVICE(vendor, product), \
426 .driver_info = (kernel_ulong_t)default_port_spec
427
428 #define icon321_port_device(vendor, product) \
429 USB_DEVICE(vendor, product), \
430 .driver_info = (kernel_ulong_t)icon321_port_spec
431
432 /* list of devices we support */
433 static const struct usb_device_id hso_ids[] = {
434 {default_port_device(0x0af0, 0x6711)},
435 {default_port_device(0x0af0, 0x6731)},
436 {default_port_device(0x0af0, 0x6751)},
437 {default_port_device(0x0af0, 0x6771)},
438 {default_port_device(0x0af0, 0x6791)},
439 {default_port_device(0x0af0, 0x6811)},
440 {default_port_device(0x0af0, 0x6911)},
441 {default_port_device(0x0af0, 0x6951)},
442 {default_port_device(0x0af0, 0x6971)},
443 {default_port_device(0x0af0, 0x7011)},
444 {default_port_device(0x0af0, 0x7031)},
445 {default_port_device(0x0af0, 0x7051)},
446 {default_port_device(0x0af0, 0x7071)},
447 {default_port_device(0x0af0, 0x7111)},
448 {default_port_device(0x0af0, 0x7211)},
449 {default_port_device(0x0af0, 0x7251)},
450 {default_port_device(0x0af0, 0x7271)},
451 {default_port_device(0x0af0, 0x7311)},
452 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
453 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
454 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
455 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
456 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
457 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
458 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
459 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
460 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
461 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
462 {USB_DEVICE(0x0af0, 0x7701)},
463 {USB_DEVICE(0x0af0, 0x7801)},
464 {USB_DEVICE(0x0af0, 0x7901)},
465 {USB_DEVICE(0x0af0, 0x7361)},
466 {USB_DEVICE(0x0af0, 0xd057)},
467 {USB_DEVICE(0x0af0, 0xd055)},
468 {}
469 };
470 MODULE_DEVICE_TABLE(usb, hso_ids);
471
472 /* Sysfs attribute */
473 static ssize_t hso_sysfs_show_porttype(struct device *dev,
474 struct device_attribute *attr,
475 char *buf)
476 {
477 struct hso_device *hso_dev = dev->driver_data;
478 char *port_name;
479
480 if (!hso_dev)
481 return 0;
482
483 switch (hso_dev->port_spec & HSO_PORT_MASK) {
484 case HSO_PORT_CONTROL:
485 port_name = "Control";
486 break;
487 case HSO_PORT_APP:
488 port_name = "Application";
489 break;
490 case HSO_PORT_APP2:
491 port_name = "Application2";
492 break;
493 case HSO_PORT_GPS:
494 port_name = "GPS";
495 break;
496 case HSO_PORT_GPS_CONTROL:
497 port_name = "GPS Control";
498 break;
499 case HSO_PORT_PCSC:
500 port_name = "PCSC";
501 break;
502 case HSO_PORT_DIAG:
503 port_name = "Diagnostic";
504 break;
505 case HSO_PORT_DIAG2:
506 port_name = "Diagnostic2";
507 break;
508 case HSO_PORT_MODEM:
509 port_name = "Modem";
510 break;
511 case HSO_PORT_NETWORK:
512 port_name = "Network";
513 break;
514 default:
515 port_name = "Unknown";
516 break;
517 }
518
519 return sprintf(buf, "%s\n", port_name);
520 }
521 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
522
523 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
524 {
525 int idx;
526
527 for (idx = 0; idx < serial->num_rx_urbs; idx++)
528 if (serial->rx_urb[idx] == urb)
529 return idx;
530 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
531 return -1;
532 }
533
534 /* converts mux value to a port spec value */
535 static u32 hso_mux_to_port(int mux)
536 {
537 u32 result;
538
539 switch (mux) {
540 case 0x1:
541 result = HSO_PORT_CONTROL;
542 break;
543 case 0x2:
544 result = HSO_PORT_APP;
545 break;
546 case 0x4:
547 result = HSO_PORT_PCSC;
548 break;
549 case 0x8:
550 result = HSO_PORT_GPS;
551 break;
552 case 0x10:
553 result = HSO_PORT_APP2;
554 break;
555 default:
556 result = HSO_PORT_NO_PORT;
557 }
558 return result;
559 }
560
561 /* converts port spec value to a mux value */
562 static u32 hso_port_to_mux(int port)
563 {
564 u32 result;
565
566 switch (port & HSO_PORT_MASK) {
567 case HSO_PORT_CONTROL:
568 result = 0x0;
569 break;
570 case HSO_PORT_APP:
571 result = 0x1;
572 break;
573 case HSO_PORT_PCSC:
574 result = 0x2;
575 break;
576 case HSO_PORT_GPS:
577 result = 0x3;
578 break;
579 case HSO_PORT_APP2:
580 result = 0x4;
581 break;
582 default:
583 result = 0x0;
584 }
585 return result;
586 }
587
588 static struct hso_serial *get_serial_by_shared_int_and_type(
589 struct hso_shared_int *shared_int,
590 int mux)
591 {
592 int i, port;
593
594 port = hso_mux_to_port(mux);
595
596 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
597 if (serial_table[i]
598 && (dev2ser(serial_table[i])->shared_int == shared_int)
599 && ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
600 return dev2ser(serial_table[i]);
601 }
602 }
603
604 return NULL;
605 }
606
607 static struct hso_serial *get_serial_by_index(unsigned index)
608 {
609 struct hso_serial *serial = NULL;
610 unsigned long flags;
611
612 spin_lock_irqsave(&serial_table_lock, flags);
613 if (serial_table[index])
614 serial = dev2ser(serial_table[index]);
615 spin_unlock_irqrestore(&serial_table_lock, flags);
616
617 return serial;
618 }
619
620 static int get_free_serial_index(void)
621 {
622 int index;
623 unsigned long flags;
624
625 spin_lock_irqsave(&serial_table_lock, flags);
626 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
627 if (serial_table[index] == NULL) {
628 spin_unlock_irqrestore(&serial_table_lock, flags);
629 return index;
630 }
631 }
632 spin_unlock_irqrestore(&serial_table_lock, flags);
633
634 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
635 return -1;
636 }
637
638 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
639 {
640 unsigned long flags;
641
642 spin_lock_irqsave(&serial_table_lock, flags);
643 if (serial)
644 serial_table[index] = serial->parent;
645 else
646 serial_table[index] = NULL;
647 spin_unlock_irqrestore(&serial_table_lock, flags);
648 }
649
650 /* log a meaningful explanation of an USB status */
651 static void log_usb_status(int status, const char *function)
652 {
653 char *explanation;
654
655 switch (status) {
656 case -ENODEV:
657 explanation = "no device";
658 break;
659 case -ENOENT:
660 explanation = "endpoint not enabled";
661 break;
662 case -EPIPE:
663 explanation = "endpoint stalled";
664 break;
665 case -ENOSPC:
666 explanation = "not enough bandwidth";
667 break;
668 case -ESHUTDOWN:
669 explanation = "device disabled";
670 break;
671 case -EHOSTUNREACH:
672 explanation = "device suspended";
673 break;
674 case -EINVAL:
675 case -EAGAIN:
676 case -EFBIG:
677 case -EMSGSIZE:
678 explanation = "internal error";
679 break;
680 default:
681 explanation = "unknown status";
682 break;
683 }
684 D1("%s: received USB status - %s (%d)", function, explanation, status);
685 }
686
687 /* Network interface functions */
688
689 /* called when net interface is brought up by ifconfig */
690 static int hso_net_open(struct net_device *net)
691 {
692 struct hso_net *odev = netdev_priv(net);
693 unsigned long flags = 0;
694
695 if (!odev) {
696 dev_err(&net->dev, "No net device !\n");
697 return -ENODEV;
698 }
699
700 odev->skb_tx_buf = NULL;
701
702 /* setup environment */
703 spin_lock_irqsave(&odev->net_lock, flags);
704 odev->rx_parse_state = WAIT_IP;
705 odev->rx_buf_size = 0;
706 odev->rx_buf_missing = sizeof(struct iphdr);
707 spin_unlock_irqrestore(&odev->net_lock, flags);
708
709 /* We are up and running. */
710 set_bit(HSO_NET_RUNNING, &odev->flags);
711 hso_start_net_device(odev->parent);
712
713 /* Tell the kernel we are ready to start receiving from it */
714 netif_start_queue(net);
715
716 return 0;
717 }
718
719 /* called when interface is brought down by ifconfig */
720 static int hso_net_close(struct net_device *net)
721 {
722 struct hso_net *odev = netdev_priv(net);
723
724 /* we don't need the queue anymore */
725 netif_stop_queue(net);
726 /* no longer running */
727 clear_bit(HSO_NET_RUNNING, &odev->flags);
728
729 hso_stop_net_device(odev->parent);
730
731 /* done */
732 return 0;
733 }
734
735 /* USB tells is xmit done, we should start the netqueue again */
736 static void write_bulk_callback(struct urb *urb)
737 {
738 struct hso_net *odev = urb->context;
739 int status = urb->status;
740
741 /* Sanity check */
742 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
743 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
744 return;
745 }
746
747 /* Do we still have a valid kernel network device? */
748 if (!netif_device_present(odev->net)) {
749 dev_err(&urb->dev->dev, "%s: net device not present\n",
750 __func__);
751 return;
752 }
753
754 /* log status, but don't act on it, we don't need to resubmit anything
755 * anyhow */
756 if (status)
757 log_usb_status(status, __func__);
758
759 hso_put_activity(odev->parent);
760
761 /* Tell the network interface we are ready for another frame */
762 netif_wake_queue(odev->net);
763 }
764
765 /* called by kernel when we need to transmit a packet */
766 static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net)
767 {
768 struct hso_net *odev = netdev_priv(net);
769 int result;
770
771 /* Tell the kernel, "No more frames 'til we are done with this one." */
772 netif_stop_queue(net);
773 if (hso_get_activity(odev->parent) == -EAGAIN) {
774 odev->skb_tx_buf = skb;
775 return 0;
776 }
777
778 /* log if asked */
779 DUMP1(skb->data, skb->len);
780 /* Copy it from kernel memory to OUR memory */
781 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
782 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
783
784 /* Fill in the URB for shipping it out. */
785 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
786 odev->parent->usb,
787 usb_sndbulkpipe(odev->parent->usb,
788 odev->out_endp->
789 bEndpointAddress & 0x7F),
790 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
791 odev);
792
793 /* Deal with the Zero Length packet problem, I hope */
794 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
795
796 /* Send the URB on its merry way. */
797 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
798 if (result) {
799 dev_warn(&odev->parent->interface->dev,
800 "failed mux_bulk_tx_urb %d", result);
801 net->stats.tx_errors++;
802 netif_start_queue(net);
803 } else {
804 net->stats.tx_packets++;
805 net->stats.tx_bytes += skb->len;
806 /* And tell the kernel when the last transmit started. */
807 net->trans_start = jiffies;
808 }
809 dev_kfree_skb(skb);
810 /* we're done */
811 return result;
812 }
813
814 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
815 {
816 struct hso_net *odev = netdev_priv(net);
817
818 strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
819 strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
820 usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
821 }
822
823 static struct ethtool_ops ops = {
824 .get_drvinfo = hso_get_drvinfo,
825 .get_link = ethtool_op_get_link
826 };
827
828 /* called when a packet did not ack after watchdogtimeout */
829 static void hso_net_tx_timeout(struct net_device *net)
830 {
831 struct hso_net *odev = netdev_priv(net);
832
833 if (!odev)
834 return;
835
836 /* Tell syslog we are hosed. */
837 dev_warn(&net->dev, "Tx timed out.\n");
838
839 /* Tear the waiting frame off the list */
840 if (odev->mux_bulk_tx_urb
841 && (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
842 usb_unlink_urb(odev->mux_bulk_tx_urb);
843
844 /* Update statistics */
845 net->stats.tx_errors++;
846 }
847
848 /* make a real packet from the received USB buffer */
849 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
850 unsigned int count, unsigned char is_eop)
851 {
852 unsigned short temp_bytes;
853 unsigned short buffer_offset = 0;
854 unsigned short frame_len;
855 unsigned char *tmp_rx_buf;
856
857 /* log if needed */
858 D1("Rx %d bytes", count);
859 DUMP(ip_pkt, min(128, (int)count));
860
861 while (count) {
862 switch (odev->rx_parse_state) {
863 case WAIT_IP:
864 /* waiting for IP header. */
865 /* wanted bytes - size of ip header */
866 temp_bytes =
867 (count <
868 odev->rx_buf_missing) ? count : odev->
869 rx_buf_missing;
870
871 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
872 odev->rx_buf_size, ip_pkt + buffer_offset,
873 temp_bytes);
874
875 odev->rx_buf_size += temp_bytes;
876 buffer_offset += temp_bytes;
877 odev->rx_buf_missing -= temp_bytes;
878 count -= temp_bytes;
879
880 if (!odev->rx_buf_missing) {
881 /* header is complete allocate an sk_buffer and
882 * continue to WAIT_DATA */
883 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
884
885 if ((frame_len > DEFAULT_MRU) ||
886 (frame_len < sizeof(struct iphdr))) {
887 dev_err(&odev->net->dev,
888 "Invalid frame (%d) length\n",
889 frame_len);
890 odev->rx_parse_state = WAIT_SYNC;
891 continue;
892 }
893 /* Allocate an sk_buff */
894 odev->skb_rx_buf = dev_alloc_skb(frame_len);
895 if (!odev->skb_rx_buf) {
896 /* We got no receive buffer. */
897 D1("could not allocate memory");
898 odev->rx_parse_state = WAIT_SYNC;
899 return;
900 }
901 /* Here's where it came from */
902 odev->skb_rx_buf->dev = odev->net;
903
904 /* Copy what we got so far. make room for iphdr
905 * after tail. */
906 tmp_rx_buf =
907 skb_put(odev->skb_rx_buf,
908 sizeof(struct iphdr));
909 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
910 sizeof(struct iphdr));
911
912 /* ETH_HLEN */
913 odev->rx_buf_size = sizeof(struct iphdr);
914
915 /* Filip actually use .tot_len */
916 odev->rx_buf_missing =
917 frame_len - sizeof(struct iphdr);
918 odev->rx_parse_state = WAIT_DATA;
919 }
920 break;
921
922 case WAIT_DATA:
923 temp_bytes = (count < odev->rx_buf_missing)
924 ? count : odev->rx_buf_missing;
925
926 /* Copy the rest of the bytes that are left in the
927 * buffer into the waiting sk_buf. */
928 /* Make room for temp_bytes after tail. */
929 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
930 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
931
932 odev->rx_buf_missing -= temp_bytes;
933 count -= temp_bytes;
934 buffer_offset += temp_bytes;
935 odev->rx_buf_size += temp_bytes;
936 if (!odev->rx_buf_missing) {
937 /* Packet is complete. Inject into stack. */
938 /* We have IP packet here */
939 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
940 /* don't check it */
941 odev->skb_rx_buf->ip_summed =
942 CHECKSUM_UNNECESSARY;
943
944 skb_reset_mac_header(odev->skb_rx_buf);
945
946 /* Ship it off to the kernel */
947 netif_rx(odev->skb_rx_buf);
948 /* No longer our buffer. */
949 odev->skb_rx_buf = NULL;
950
951 /* update out statistics */
952 odev->net->stats.rx_packets++;
953
954 odev->net->stats.rx_bytes += odev->rx_buf_size;
955
956 odev->rx_buf_size = 0;
957 odev->rx_buf_missing = sizeof(struct iphdr);
958 odev->rx_parse_state = WAIT_IP;
959 }
960 break;
961
962 case WAIT_SYNC:
963 D1(" W_S");
964 count = 0;
965 break;
966 default:
967 D1(" ");
968 count--;
969 break;
970 }
971 }
972
973 /* Recovery mechanism for WAIT_SYNC state. */
974 if (is_eop) {
975 if (odev->rx_parse_state == WAIT_SYNC) {
976 odev->rx_parse_state = WAIT_IP;
977 odev->rx_buf_size = 0;
978 odev->rx_buf_missing = sizeof(struct iphdr);
979 }
980 }
981 }
982
983 /* Moving data from usb to kernel (in interrupt state) */
984 static void read_bulk_callback(struct urb *urb)
985 {
986 struct hso_net *odev = urb->context;
987 struct net_device *net;
988 int result;
989 int status = urb->status;
990
991 /* is al ok? (Filip: Who's Al ?) */
992 if (status) {
993 log_usb_status(status, __func__);
994 return;
995 }
996
997 /* Sanity check */
998 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
999 D1("BULK IN callback but driver is not active!");
1000 return;
1001 }
1002 usb_mark_last_busy(urb->dev);
1003
1004 net = odev->net;
1005
1006 if (!netif_device_present(net)) {
1007 /* Somebody killed our network interface... */
1008 return;
1009 }
1010
1011 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1012 u32 rest;
1013 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1014 rest = urb->actual_length % odev->in_endp->wMaxPacketSize;
1015 if (((rest == 5) || (rest == 6))
1016 && !memcmp(((u8 *) urb->transfer_buffer) +
1017 urb->actual_length - 4, crc_check, 4)) {
1018 urb->actual_length -= 4;
1019 }
1020 }
1021
1022 /* do we even have a packet? */
1023 if (urb->actual_length) {
1024 /* Handle the IP stream, add header and push it onto network
1025 * stack if the packet is complete. */
1026 spin_lock(&odev->net_lock);
1027 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1028 (urb->transfer_buffer_length >
1029 urb->actual_length) ? 1 : 0);
1030 spin_unlock(&odev->net_lock);
1031 }
1032
1033 /* We are done with this URB, resubmit it. Prep the USB to wait for
1034 * another frame. Reuse same as received. */
1035 usb_fill_bulk_urb(urb,
1036 odev->parent->usb,
1037 usb_rcvbulkpipe(odev->parent->usb,
1038 odev->in_endp->
1039 bEndpointAddress & 0x7F),
1040 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1041 read_bulk_callback, odev);
1042
1043 /* Give this to the USB subsystem so it can tell us when more data
1044 * arrives. */
1045 result = usb_submit_urb(urb, GFP_ATOMIC);
1046 if (result)
1047 dev_warn(&odev->parent->interface->dev,
1048 "%s failed submit mux_bulk_rx_urb %d", __func__,
1049 result);
1050 }
1051
1052 /* Serial driver functions */
1053
1054 static void hso_init_termios(struct ktermios *termios)
1055 {
1056 /*
1057 * The default requirements for this device are:
1058 */
1059 termios->c_iflag &=
1060 ~(IGNBRK /* disable ignore break */
1061 | BRKINT /* disable break causes interrupt */
1062 | PARMRK /* disable mark parity errors */
1063 | ISTRIP /* disable clear high bit of input characters */
1064 | INLCR /* disable translate NL to CR */
1065 | IGNCR /* disable ignore CR */
1066 | ICRNL /* disable translate CR to NL */
1067 | IXON); /* disable enable XON/XOFF flow control */
1068
1069 /* disable postprocess output characters */
1070 termios->c_oflag &= ~OPOST;
1071
1072 termios->c_lflag &=
1073 ~(ECHO /* disable echo input characters */
1074 | ECHONL /* disable echo new line */
1075 | ICANON /* disable erase, kill, werase, and rprnt
1076 special characters */
1077 | ISIG /* disable interrupt, quit, and suspend special
1078 characters */
1079 | IEXTEN); /* disable non-POSIX special characters */
1080
1081 termios->c_cflag &=
1082 ~(CSIZE /* no size */
1083 | PARENB /* disable parity bit */
1084 | CBAUD /* clear current baud rate */
1085 | CBAUDEX); /* clear current buad rate */
1086
1087 termios->c_cflag |= CS8; /* character size 8 bits */
1088
1089 /* baud rate 115200 */
1090 tty_termios_encode_baud_rate(termios, 115200, 115200);
1091 }
1092
1093 static void _hso_serial_set_termios(struct tty_struct *tty,
1094 struct ktermios *old)
1095 {
1096 struct hso_serial *serial = get_serial_by_tty(tty);
1097 struct ktermios *termios;
1098
1099 if (!serial) {
1100 printk(KERN_ERR "%s: no tty structures", __func__);
1101 return;
1102 }
1103
1104 D4("port %d", serial->minor);
1105
1106 /*
1107 * Fix up unsupported bits
1108 */
1109 termios = tty->termios;
1110 termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1111
1112 termios->c_cflag &=
1113 ~(CSIZE /* no size */
1114 | PARENB /* disable parity bit */
1115 | CBAUD /* clear current baud rate */
1116 | CBAUDEX); /* clear current buad rate */
1117
1118 termios->c_cflag |= CS8; /* character size 8 bits */
1119
1120 /* baud rate 115200 */
1121 tty_encode_baud_rate(tty, 115200, 115200);
1122 }
1123
1124 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1125 {
1126 int result;
1127 #ifdef CONFIG_HSO_AUTOPM
1128 usb_mark_last_busy(urb->dev);
1129 #endif
1130 /* We are done with this URB, resubmit it. Prep the USB to wait for
1131 * another frame */
1132 usb_fill_bulk_urb(urb, serial->parent->usb,
1133 usb_rcvbulkpipe(serial->parent->usb,
1134 serial->in_endp->
1135 bEndpointAddress & 0x7F),
1136 urb->transfer_buffer, serial->rx_data_length,
1137 hso_std_serial_read_bulk_callback, serial);
1138 /* Give this to the USB subsystem so it can tell us when more data
1139 * arrives. */
1140 result = usb_submit_urb(urb, GFP_ATOMIC);
1141 if (result) {
1142 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1143 __func__, result);
1144 }
1145 }
1146
1147
1148
1149
1150 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1151 {
1152 int count;
1153 struct urb *curr_urb;
1154
1155 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1156 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1157 count = put_rxbuf_data(curr_urb, serial);
1158 if (count == -1)
1159 return;
1160 if (count == 0) {
1161 serial->curr_rx_urb_idx++;
1162 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1163 serial->curr_rx_urb_idx = 0;
1164 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1165 }
1166 }
1167 }
1168
1169 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1170 {
1171 int count = 0;
1172 struct urb *urb;
1173
1174 urb = serial->rx_urb[0];
1175 if (serial->open_count > 0) {
1176 count = put_rxbuf_data(urb, serial);
1177 if (count == -1)
1178 return;
1179 }
1180 /* Re issue a read as long as we receive data. */
1181
1182 if (count == 0 && ((urb->actual_length != 0) ||
1183 (serial->rx_state == RX_PENDING))) {
1184 serial->rx_state = RX_SENT;
1185 hso_mux_serial_read(serial);
1186 } else
1187 serial->rx_state = RX_IDLE;
1188 }
1189
1190
1191 /* read callback for Diag and CS port */
1192 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1193 {
1194 struct hso_serial *serial = urb->context;
1195 int status = urb->status;
1196
1197 /* sanity check */
1198 if (!serial) {
1199 D1("serial == NULL");
1200 return;
1201 } else if (status) {
1202 log_usb_status(status, __func__);
1203 return;
1204 }
1205
1206 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1207 D1("Actual length = %d\n", urb->actual_length);
1208 DUMP1(urb->transfer_buffer, urb->actual_length);
1209
1210 /* Anyone listening? */
1211 if (serial->open_count == 0)
1212 return;
1213
1214 if (status == 0) {
1215 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1216 u32 rest;
1217 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1218 rest =
1219 urb->actual_length %
1220 serial->in_endp->wMaxPacketSize;
1221 if (((rest == 5) || (rest == 6))
1222 && !memcmp(((u8 *) urb->transfer_buffer) +
1223 urb->actual_length - 4, crc_check, 4)) {
1224 urb->actual_length -= 4;
1225 }
1226 }
1227 /* Valid data, handle RX data */
1228 spin_lock(&serial->serial_lock);
1229 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1230 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1231 spin_unlock(&serial->serial_lock);
1232 } else if (status == -ENOENT || status == -ECONNRESET) {
1233 /* Unlinked - check for throttled port. */
1234 D2("Port %d, successfully unlinked urb", serial->minor);
1235 spin_lock(&serial->serial_lock);
1236 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1237 hso_resubmit_rx_bulk_urb(serial, urb);
1238 spin_unlock(&serial->serial_lock);
1239 } else {
1240 D2("Port %d, status = %d for read urb", serial->minor, status);
1241 return;
1242 }
1243 }
1244
1245 /*
1246 * This needs to be a tasklet otherwise we will
1247 * end up recursively calling this function.
1248 */
1249 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1250 {
1251 unsigned long flags;
1252
1253 spin_lock_irqsave(&serial->serial_lock, flags);
1254 if ((serial->parent->port_spec & HSO_INTF_MUX))
1255 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1256 else
1257 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1258 spin_unlock_irqrestore(&serial->serial_lock, flags);
1259 }
1260
1261 static void hso_unthrottle(struct tty_struct *tty)
1262 {
1263 struct hso_serial *serial = get_serial_by_tty(tty);
1264
1265 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1266 }
1267
1268 static void hso_unthrottle_workfunc(struct work_struct *work)
1269 {
1270 struct hso_serial *serial =
1271 container_of(work, struct hso_serial,
1272 retry_unthrottle_workqueue);
1273 hso_unthrottle_tasklet(serial);
1274 }
1275
1276 /* open the requested serial port */
1277 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1278 {
1279 struct hso_serial *serial = get_serial_by_index(tty->index);
1280 int result;
1281
1282 /* sanity check */
1283 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1284 WARN_ON(1);
1285 tty->driver_data = NULL;
1286 D1("Failed to open port");
1287 return -ENODEV;
1288 }
1289
1290 mutex_lock(&serial->parent->mutex);
1291 result = usb_autopm_get_interface(serial->parent->interface);
1292 if (result < 0)
1293 goto err_out;
1294
1295 D1("Opening %d", serial->minor);
1296 kref_get(&serial->parent->ref);
1297
1298 /* setup */
1299 spin_lock_irq(&serial->serial_lock);
1300 tty->driver_data = serial;
1301 tty_kref_put(serial->tty);
1302 serial->tty = tty_kref_get(tty);
1303 spin_unlock_irq(&serial->serial_lock);
1304
1305 /* check for port already opened, if not set the termios */
1306 serial->open_count++;
1307 if (serial->open_count == 1) {
1308 tty->low_latency = 1;
1309 serial->rx_state = RX_IDLE;
1310 /* Force default termio settings */
1311 _hso_serial_set_termios(tty, NULL);
1312 tasklet_init(&serial->unthrottle_tasklet,
1313 (void (*)(unsigned long))hso_unthrottle_tasklet,
1314 (unsigned long)serial);
1315 INIT_WORK(&serial->retry_unthrottle_workqueue,
1316 hso_unthrottle_workfunc);
1317 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1318 if (result) {
1319 hso_stop_serial_device(serial->parent);
1320 serial->open_count--;
1321 kref_put(&serial->parent->ref, hso_serial_ref_free);
1322 }
1323 } else {
1324 D1("Port was already open");
1325 }
1326
1327 usb_autopm_put_interface(serial->parent->interface);
1328
1329 /* done */
1330 if (result)
1331 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1332 err_out:
1333 mutex_unlock(&serial->parent->mutex);
1334 return result;
1335 }
1336
1337 /* close the requested serial port */
1338 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1339 {
1340 struct hso_serial *serial = tty->driver_data;
1341 u8 usb_gone;
1342
1343 D1("Closing serial port");
1344
1345 /* Open failed, no close cleanup required */
1346 if (serial == NULL)
1347 return;
1348
1349 mutex_lock(&serial->parent->mutex);
1350 usb_gone = serial->parent->usb_gone;
1351
1352 if (!usb_gone)
1353 usb_autopm_get_interface(serial->parent->interface);
1354
1355 /* reset the rts and dtr */
1356 /* do the actual close */
1357 serial->open_count--;
1358 kref_put(&serial->parent->ref, hso_serial_ref_free);
1359 if (serial->open_count <= 0) {
1360 serial->open_count = 0;
1361 spin_lock_irq(&serial->serial_lock);
1362 if (serial->tty == tty) {
1363 serial->tty->driver_data = NULL;
1364 serial->tty = NULL;
1365 tty_kref_put(tty);
1366 }
1367 spin_unlock_irq(&serial->serial_lock);
1368 if (!usb_gone)
1369 hso_stop_serial_device(serial->parent);
1370 tasklet_kill(&serial->unthrottle_tasklet);
1371 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1372 }
1373
1374 if (!usb_gone)
1375 usb_autopm_put_interface(serial->parent->interface);
1376
1377 mutex_unlock(&serial->parent->mutex);
1378 }
1379
1380 /* close the requested serial port */
1381 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1382 int count)
1383 {
1384 struct hso_serial *serial = get_serial_by_tty(tty);
1385 int space, tx_bytes;
1386 unsigned long flags;
1387
1388 /* sanity check */
1389 if (serial == NULL) {
1390 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1391 return -ENODEV;
1392 }
1393
1394 spin_lock_irqsave(&serial->serial_lock, flags);
1395
1396 space = serial->tx_data_length - serial->tx_buffer_count;
1397 tx_bytes = (count < space) ? count : space;
1398
1399 if (!tx_bytes)
1400 goto out;
1401
1402 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1403 serial->tx_buffer_count += tx_bytes;
1404
1405 out:
1406 spin_unlock_irqrestore(&serial->serial_lock, flags);
1407
1408 hso_kick_transmit(serial);
1409 /* done */
1410 return tx_bytes;
1411 }
1412
1413 /* how much room is there for writing */
1414 static int hso_serial_write_room(struct tty_struct *tty)
1415 {
1416 struct hso_serial *serial = get_serial_by_tty(tty);
1417 int room;
1418 unsigned long flags;
1419
1420 spin_lock_irqsave(&serial->serial_lock, flags);
1421 room = serial->tx_data_length - serial->tx_buffer_count;
1422 spin_unlock_irqrestore(&serial->serial_lock, flags);
1423
1424 /* return free room */
1425 return room;
1426 }
1427
1428 /* setup the term */
1429 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1430 {
1431 struct hso_serial *serial = get_serial_by_tty(tty);
1432 unsigned long flags;
1433
1434 if (old)
1435 D5("Termios called with: cflags new[%d] - old[%d]",
1436 tty->termios->c_cflag, old->c_cflag);
1437
1438 /* the actual setup */
1439 spin_lock_irqsave(&serial->serial_lock, flags);
1440 if (serial->open_count)
1441 _hso_serial_set_termios(tty, old);
1442 else
1443 tty->termios = old;
1444 spin_unlock_irqrestore(&serial->serial_lock, flags);
1445
1446 /* done */
1447 return;
1448 }
1449
1450 /* how many characters in the buffer */
1451 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1452 {
1453 struct hso_serial *serial = get_serial_by_tty(tty);
1454 int chars;
1455 unsigned long flags;
1456
1457 /* sanity check */
1458 if (serial == NULL)
1459 return 0;
1460
1461 spin_lock_irqsave(&serial->serial_lock, flags);
1462 chars = serial->tx_buffer_count;
1463 spin_unlock_irqrestore(&serial->serial_lock, flags);
1464
1465 return chars;
1466 }
1467 static int tiocmget_submit_urb(struct hso_serial *serial,
1468 struct hso_tiocmget *tiocmget,
1469 struct usb_device *usb)
1470 {
1471 int result;
1472
1473 if (serial->parent->usb_gone)
1474 return -ENODEV;
1475 usb_fill_int_urb(tiocmget->urb, usb,
1476 usb_rcvintpipe(usb,
1477 tiocmget->endp->
1478 bEndpointAddress & 0x7F),
1479 &tiocmget->serial_state_notification,
1480 sizeof(struct hso_serial_state_notification),
1481 tiocmget_intr_callback, serial,
1482 tiocmget->endp->bInterval);
1483 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1484 if (result) {
1485 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1486 result);
1487 }
1488 return result;
1489
1490 }
1491
1492 static void tiocmget_intr_callback(struct urb *urb)
1493 {
1494 struct hso_serial *serial = urb->context;
1495 struct hso_tiocmget *tiocmget;
1496 int status = urb->status;
1497 u16 UART_state_bitmap, prev_UART_state_bitmap;
1498 struct uart_icount *icount;
1499 struct hso_serial_state_notification *serial_state_notification;
1500 struct usb_device *usb;
1501
1502 /* Sanity checks */
1503 if (!serial)
1504 return;
1505 if (status) {
1506 log_usb_status(status, __func__);
1507 return;
1508 }
1509 tiocmget = serial->tiocmget;
1510 if (!tiocmget)
1511 return;
1512 usb = serial->parent->usb;
1513 serial_state_notification = &tiocmget->serial_state_notification;
1514 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1515 serial_state_notification->bNotification != B_NOTIFICATION ||
1516 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1517 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1518 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1519 dev_warn(&usb->dev,
1520 "hso received invalid serial state notification\n");
1521 DUMP(serial_state_notification,
1522 sizeof(hso_serial_state_notifation))
1523 } else {
1524
1525 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1526 UART_state_bitmap);
1527 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1528 icount = &tiocmget->icount;
1529 spin_lock(&serial->serial_lock);
1530 if ((UART_state_bitmap & B_OVERRUN) !=
1531 (prev_UART_state_bitmap & B_OVERRUN))
1532 icount->parity++;
1533 if ((UART_state_bitmap & B_PARITY) !=
1534 (prev_UART_state_bitmap & B_PARITY))
1535 icount->parity++;
1536 if ((UART_state_bitmap & B_FRAMING) !=
1537 (prev_UART_state_bitmap & B_FRAMING))
1538 icount->frame++;
1539 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1540 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1541 icount->rng++;
1542 if ((UART_state_bitmap & B_BREAK) !=
1543 (prev_UART_state_bitmap & B_BREAK))
1544 icount->brk++;
1545 if ((UART_state_bitmap & B_TX_CARRIER) !=
1546 (prev_UART_state_bitmap & B_TX_CARRIER))
1547 icount->dsr++;
1548 if ((UART_state_bitmap & B_RX_CARRIER) !=
1549 (prev_UART_state_bitmap & B_RX_CARRIER))
1550 icount->dcd++;
1551 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1552 spin_unlock(&serial->serial_lock);
1553 tiocmget->intr_completed = 1;
1554 wake_up_interruptible(&tiocmget->waitq);
1555 }
1556 memset(serial_state_notification, 0,
1557 sizeof(struct hso_serial_state_notification));
1558 tiocmget_submit_urb(serial,
1559 tiocmget,
1560 serial->parent->usb);
1561 }
1562
1563 /*
1564 * next few functions largely stolen from drivers/serial/serial_core.c
1565 */
1566 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1567 * - mask passed in arg for lines of interest
1568 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1569 * Caller should use TIOCGICOUNT to see which one it was
1570 */
1571 static int
1572 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1573 {
1574 DECLARE_WAITQUEUE(wait, current);
1575 struct uart_icount cprev, cnow;
1576 struct hso_tiocmget *tiocmget;
1577 int ret;
1578
1579 tiocmget = serial->tiocmget;
1580 if (!tiocmget)
1581 return -ENOENT;
1582 /*
1583 * note the counters on entry
1584 */
1585 spin_lock_irq(&serial->serial_lock);
1586 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1587 spin_unlock_irq(&serial->serial_lock);
1588 add_wait_queue(&tiocmget->waitq, &wait);
1589 for (;;) {
1590 spin_lock_irq(&serial->serial_lock);
1591 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1592 spin_unlock_irq(&serial->serial_lock);
1593 set_current_state(TASK_INTERRUPTIBLE);
1594 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1595 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1596 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1597 ret = 0;
1598 break;
1599 }
1600 schedule();
1601 /* see if a signal did it */
1602 if (signal_pending(current)) {
1603 ret = -ERESTARTSYS;
1604 break;
1605 }
1606 cprev = cnow;
1607 }
1608 current->state = TASK_RUNNING;
1609 remove_wait_queue(&tiocmget->waitq, &wait);
1610
1611 return ret;
1612 }
1613
1614 /*
1615 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1616 * Return: write counters to the user passed counter struct
1617 * NB: both 1->0 and 0->1 transitions are counted except for
1618 * RI where only 0->1 is counted.
1619 */
1620 static int hso_get_count(struct hso_serial *serial,
1621 struct serial_icounter_struct __user *icnt)
1622 {
1623 struct serial_icounter_struct icount;
1624 struct uart_icount cnow;
1625 struct hso_tiocmget *tiocmget = serial->tiocmget;
1626
1627 if (!tiocmget)
1628 return -ENOENT;
1629 spin_lock_irq(&serial->serial_lock);
1630 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1631 spin_unlock_irq(&serial->serial_lock);
1632
1633 icount.cts = cnow.cts;
1634 icount.dsr = cnow.dsr;
1635 icount.rng = cnow.rng;
1636 icount.dcd = cnow.dcd;
1637 icount.rx = cnow.rx;
1638 icount.tx = cnow.tx;
1639 icount.frame = cnow.frame;
1640 icount.overrun = cnow.overrun;
1641 icount.parity = cnow.parity;
1642 icount.brk = cnow.brk;
1643 icount.buf_overrun = cnow.buf_overrun;
1644
1645 return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
1646 }
1647
1648
1649 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1650 {
1651 int retval;
1652 struct hso_serial *serial = get_serial_by_tty(tty);
1653 struct hso_tiocmget *tiocmget;
1654 u16 UART_state_bitmap;
1655
1656 /* sanity check */
1657 if (!serial) {
1658 D1("no tty structures");
1659 return -EINVAL;
1660 }
1661 spin_lock_irq(&serial->serial_lock);
1662 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1663 ((serial->dtr_state) ? TIOCM_DTR : 0);
1664 tiocmget = serial->tiocmget;
1665 if (tiocmget) {
1666
1667 UART_state_bitmap = le16_to_cpu(
1668 tiocmget->prev_UART_state_bitmap);
1669 if (UART_state_bitmap & B_RING_SIGNAL)
1670 retval |= TIOCM_RNG;
1671 if (UART_state_bitmap & B_RX_CARRIER)
1672 retval |= TIOCM_CD;
1673 if (UART_state_bitmap & B_TX_CARRIER)
1674 retval |= TIOCM_DSR;
1675 }
1676 spin_unlock_irq(&serial->serial_lock);
1677 return retval;
1678 }
1679
1680 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1681 unsigned int set, unsigned int clear)
1682 {
1683 int val = 0;
1684 unsigned long flags;
1685 int if_num;
1686 struct hso_serial *serial = get_serial_by_tty(tty);
1687
1688 /* sanity check */
1689 if (!serial) {
1690 D1("no tty structures");
1691 return -EINVAL;
1692 }
1693 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1694
1695 spin_lock_irqsave(&serial->serial_lock, flags);
1696 if (set & TIOCM_RTS)
1697 serial->rts_state = 1;
1698 if (set & TIOCM_DTR)
1699 serial->dtr_state = 1;
1700
1701 if (clear & TIOCM_RTS)
1702 serial->rts_state = 0;
1703 if (clear & TIOCM_DTR)
1704 serial->dtr_state = 0;
1705
1706 if (serial->dtr_state)
1707 val |= 0x01;
1708 if (serial->rts_state)
1709 val |= 0x02;
1710
1711 spin_unlock_irqrestore(&serial->serial_lock, flags);
1712
1713 return usb_control_msg(serial->parent->usb,
1714 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1715 0x21, val, if_num, NULL, 0,
1716 USB_CTRL_SET_TIMEOUT);
1717 }
1718
1719 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1720 unsigned int cmd, unsigned long arg)
1721 {
1722 struct hso_serial *serial = get_serial_by_tty(tty);
1723 void __user *uarg = (void __user *)arg;
1724 int ret = 0;
1725 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1726
1727 if (!serial)
1728 return -ENODEV;
1729 switch (cmd) {
1730 case TIOCMIWAIT:
1731 ret = hso_wait_modem_status(serial, arg);
1732 break;
1733
1734 case TIOCGICOUNT:
1735 ret = hso_get_count(serial, uarg);
1736 break;
1737 default:
1738 ret = -ENOIOCTLCMD;
1739 break;
1740 }
1741 return ret;
1742 }
1743
1744
1745 /* starts a transmit */
1746 static void hso_kick_transmit(struct hso_serial *serial)
1747 {
1748 u8 *temp;
1749 unsigned long flags;
1750 int res;
1751
1752 spin_lock_irqsave(&serial->serial_lock, flags);
1753 if (!serial->tx_buffer_count)
1754 goto out;
1755
1756 if (serial->tx_urb_used)
1757 goto out;
1758
1759 /* Wakeup USB interface if necessary */
1760 if (hso_get_activity(serial->parent) == -EAGAIN)
1761 goto out;
1762
1763 /* Switch pointers around to avoid memcpy */
1764 temp = serial->tx_buffer;
1765 serial->tx_buffer = serial->tx_data;
1766 serial->tx_data = temp;
1767 serial->tx_data_count = serial->tx_buffer_count;
1768 serial->tx_buffer_count = 0;
1769
1770 /* If temp is set, it means we switched buffers */
1771 if (temp && serial->write_data) {
1772 res = serial->write_data(serial);
1773 if (res >= 0)
1774 serial->tx_urb_used = 1;
1775 }
1776 out:
1777 spin_unlock_irqrestore(&serial->serial_lock, flags);
1778 }
1779
1780 /* make a request (for reading and writing data to muxed serial port) */
1781 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1782 struct urb *ctrl_urb,
1783 struct usb_ctrlrequest *ctrl_req,
1784 u8 *ctrl_urb_data, u32 size)
1785 {
1786 int result;
1787 int pipe;
1788
1789 /* Sanity check */
1790 if (!serial || !ctrl_urb || !ctrl_req) {
1791 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1792 return -EINVAL;
1793 }
1794
1795 /* initialize */
1796 ctrl_req->wValue = 0;
1797 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1798 ctrl_req->wLength = cpu_to_le16(size);
1799
1800 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1801 /* Reading command */
1802 ctrl_req->bRequestType = USB_DIR_IN |
1803 USB_TYPE_OPTION_VENDOR |
1804 USB_RECIP_INTERFACE;
1805 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1806 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1807 } else {
1808 /* Writing command */
1809 ctrl_req->bRequestType = USB_DIR_OUT |
1810 USB_TYPE_OPTION_VENDOR |
1811 USB_RECIP_INTERFACE;
1812 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1813 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1814 }
1815 /* syslog */
1816 D2("%s command (%02x) len: %d, port: %d",
1817 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1818 ctrl_req->bRequestType, ctrl_req->wLength, port);
1819
1820 /* Load ctrl urb */
1821 ctrl_urb->transfer_flags = 0;
1822 usb_fill_control_urb(ctrl_urb,
1823 serial->parent->usb,
1824 pipe,
1825 (u8 *) ctrl_req,
1826 ctrl_urb_data, size, ctrl_callback, serial);
1827 /* Send it on merry way */
1828 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1829 if (result) {
1830 dev_err(&ctrl_urb->dev->dev,
1831 "%s failed submit ctrl_urb %d type %d", __func__,
1832 result, type);
1833 return result;
1834 }
1835
1836 /* done */
1837 return size;
1838 }
1839
1840 /* called by intr_callback when read occurs */
1841 static int hso_mux_serial_read(struct hso_serial *serial)
1842 {
1843 if (!serial)
1844 return -EINVAL;
1845
1846 /* clean data */
1847 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1848 /* make the request */
1849
1850 if (serial->num_rx_urbs != 1) {
1851 dev_err(&serial->parent->interface->dev,
1852 "ERROR: mux'd reads with multiple buffers "
1853 "not possible\n");
1854 return 0;
1855 }
1856 return mux_device_request(serial,
1857 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1858 serial->parent->port_spec & HSO_PORT_MASK,
1859 serial->rx_urb[0],
1860 &serial->ctrl_req_rx,
1861 serial->rx_data[0], serial->rx_data_length);
1862 }
1863
1864 /* used for muxed serial port callback (muxed serial read) */
1865 static void intr_callback(struct urb *urb)
1866 {
1867 struct hso_shared_int *shared_int = urb->context;
1868 struct hso_serial *serial;
1869 unsigned char *port_req;
1870 int status = urb->status;
1871 int i;
1872
1873 usb_mark_last_busy(urb->dev);
1874
1875 /* sanity check */
1876 if (!shared_int)
1877 return;
1878
1879 /* status check */
1880 if (status) {
1881 log_usb_status(status, __func__);
1882 return;
1883 }
1884 D4("\n--- Got intr callback 0x%02X ---", status);
1885
1886 /* what request? */
1887 port_req = urb->transfer_buffer;
1888 D4(" port_req = 0x%.2X\n", *port_req);
1889 /* loop over all muxed ports to find the one sending this */
1890 for (i = 0; i < 8; i++) {
1891 /* max 8 channels on MUX */
1892 if (*port_req & (1 << i)) {
1893 serial = get_serial_by_shared_int_and_type(shared_int,
1894 (1 << i));
1895 if (serial != NULL) {
1896 D1("Pending read interrupt on port %d\n", i);
1897 spin_lock(&serial->serial_lock);
1898 if (serial->rx_state == RX_IDLE) {
1899 /* Setup and send a ctrl req read on
1900 * port i */
1901 if (!serial->rx_urb_filled[0]) {
1902 serial->rx_state = RX_SENT;
1903 hso_mux_serial_read(serial);
1904 } else
1905 serial->rx_state = RX_PENDING;
1906
1907 } else {
1908 D1("Already pending a read on "
1909 "port %d\n", i);
1910 }
1911 spin_unlock(&serial->serial_lock);
1912 }
1913 }
1914 }
1915 /* Resubmit interrupt urb */
1916 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1917 }
1918
1919 /* called for writing to muxed serial port */
1920 static int hso_mux_serial_write_data(struct hso_serial *serial)
1921 {
1922 if (NULL == serial)
1923 return -EINVAL;
1924
1925 return mux_device_request(serial,
1926 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1927 serial->parent->port_spec & HSO_PORT_MASK,
1928 serial->tx_urb,
1929 &serial->ctrl_req_tx,
1930 serial->tx_data, serial->tx_data_count);
1931 }
1932
1933 /* write callback for Diag and CS port */
1934 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1935 {
1936 struct hso_serial *serial = urb->context;
1937 int status = urb->status;
1938 struct tty_struct *tty;
1939
1940 /* sanity check */
1941 if (!serial) {
1942 D1("serial == NULL");
1943 return;
1944 }
1945
1946 spin_lock(&serial->serial_lock);
1947 serial->tx_urb_used = 0;
1948 tty = tty_kref_get(serial->tty);
1949 spin_unlock(&serial->serial_lock);
1950 if (status) {
1951 log_usb_status(status, __func__);
1952 tty_kref_put(tty);
1953 return;
1954 }
1955 hso_put_activity(serial->parent);
1956 if (tty) {
1957 tty_wakeup(tty);
1958 tty_kref_put(tty);
1959 }
1960 hso_kick_transmit(serial);
1961
1962 D1(" ");
1963 return;
1964 }
1965
1966 /* called for writing diag or CS serial port */
1967 static int hso_std_serial_write_data(struct hso_serial *serial)
1968 {
1969 int count = serial->tx_data_count;
1970 int result;
1971
1972 usb_fill_bulk_urb(serial->tx_urb,
1973 serial->parent->usb,
1974 usb_sndbulkpipe(serial->parent->usb,
1975 serial->out_endp->
1976 bEndpointAddress & 0x7F),
1977 serial->tx_data, serial->tx_data_count,
1978 hso_std_serial_write_bulk_callback, serial);
1979
1980 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1981 if (result) {
1982 dev_warn(&serial->parent->usb->dev,
1983 "Failed to submit urb - res %d\n", result);
1984 return result;
1985 }
1986
1987 return count;
1988 }
1989
1990 /* callback after read or write on muxed serial port */
1991 static void ctrl_callback(struct urb *urb)
1992 {
1993 struct hso_serial *serial = urb->context;
1994 struct usb_ctrlrequest *req;
1995 int status = urb->status;
1996 struct tty_struct *tty;
1997
1998 /* sanity check */
1999 if (!serial)
2000 return;
2001
2002 spin_lock(&serial->serial_lock);
2003 serial->tx_urb_used = 0;
2004 tty = tty_kref_get(serial->tty);
2005 spin_unlock(&serial->serial_lock);
2006 if (status) {
2007 log_usb_status(status, __func__);
2008 tty_kref_put(tty);
2009 return;
2010 }
2011
2012 /* what request? */
2013 req = (struct usb_ctrlrequest *)(urb->setup_packet);
2014 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2015 D4("Actual length of urb = %d\n", urb->actual_length);
2016 DUMP1(urb->transfer_buffer, urb->actual_length);
2017
2018 if (req->bRequestType ==
2019 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2020 /* response to a read command */
2021 serial->rx_urb_filled[0] = 1;
2022 spin_lock(&serial->serial_lock);
2023 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2024 spin_unlock(&serial->serial_lock);
2025 } else {
2026 hso_put_activity(serial->parent);
2027 if (tty)
2028 tty_wakeup(tty);
2029 /* response to a write command */
2030 hso_kick_transmit(serial);
2031 }
2032 tty_kref_put(tty);
2033 }
2034
2035 /* handle RX data for serial port */
2036 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2037 {
2038 struct tty_struct *tty;
2039 int write_length_remaining = 0;
2040 int curr_write_len;
2041
2042 /* Sanity check */
2043 if (urb == NULL || serial == NULL) {
2044 D1("serial = NULL");
2045 return -2;
2046 }
2047
2048 /* All callers to put_rxbuf_data hold serial_lock */
2049 tty = tty_kref_get(serial->tty);
2050
2051 /* Push data to tty */
2052 if (tty) {
2053 write_length_remaining = urb->actual_length -
2054 serial->curr_rx_urb_offset;
2055 D1("data to push to tty");
2056 while (write_length_remaining) {
2057 if (test_bit(TTY_THROTTLED, &tty->flags)) {
2058 tty_kref_put(tty);
2059 return -1;
2060 }
2061 curr_write_len = tty_insert_flip_string
2062 (tty, urb->transfer_buffer +
2063 serial->curr_rx_urb_offset,
2064 write_length_remaining);
2065 serial->curr_rx_urb_offset += curr_write_len;
2066 write_length_remaining -= curr_write_len;
2067 tty_flip_buffer_push(tty);
2068 }
2069 }
2070 if (write_length_remaining == 0) {
2071 serial->curr_rx_urb_offset = 0;
2072 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2073 }
2074 tty_kref_put(tty);
2075 return write_length_remaining;
2076 }
2077
2078
2079 /* Base driver functions */
2080
2081 static void hso_log_port(struct hso_device *hso_dev)
2082 {
2083 char *port_type;
2084 char port_dev[20];
2085
2086 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2087 case HSO_PORT_CONTROL:
2088 port_type = "Control";
2089 break;
2090 case HSO_PORT_APP:
2091 port_type = "Application";
2092 break;
2093 case HSO_PORT_GPS:
2094 port_type = "GPS";
2095 break;
2096 case HSO_PORT_GPS_CONTROL:
2097 port_type = "GPS control";
2098 break;
2099 case HSO_PORT_APP2:
2100 port_type = "Application2";
2101 break;
2102 case HSO_PORT_PCSC:
2103 port_type = "PCSC";
2104 break;
2105 case HSO_PORT_DIAG:
2106 port_type = "Diagnostic";
2107 break;
2108 case HSO_PORT_DIAG2:
2109 port_type = "Diagnostic2";
2110 break;
2111 case HSO_PORT_MODEM:
2112 port_type = "Modem";
2113 break;
2114 case HSO_PORT_NETWORK:
2115 port_type = "Network";
2116 break;
2117 default:
2118 port_type = "Unknown";
2119 break;
2120 }
2121 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2122 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2123 } else
2124 sprintf(port_dev, "/dev/%s%d", tty_filename,
2125 dev2ser(hso_dev)->minor);
2126
2127 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2128 port_type, port_dev);
2129 }
2130
2131 static int hso_start_net_device(struct hso_device *hso_dev)
2132 {
2133 int i, result = 0;
2134 struct hso_net *hso_net = dev2net(hso_dev);
2135
2136 if (!hso_net)
2137 return -ENODEV;
2138
2139 /* send URBs for all read buffers */
2140 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2141
2142 /* Prep a receive URB */
2143 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2144 hso_dev->usb,
2145 usb_rcvbulkpipe(hso_dev->usb,
2146 hso_net->in_endp->
2147 bEndpointAddress & 0x7F),
2148 hso_net->mux_bulk_rx_buf_pool[i],
2149 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2150 hso_net);
2151
2152 /* Put it out there so the device can send us stuff */
2153 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2154 GFP_NOIO);
2155 if (result)
2156 dev_warn(&hso_dev->usb->dev,
2157 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2158 i, result);
2159 }
2160
2161 return result;
2162 }
2163
2164 static int hso_stop_net_device(struct hso_device *hso_dev)
2165 {
2166 int i;
2167 struct hso_net *hso_net = dev2net(hso_dev);
2168
2169 if (!hso_net)
2170 return -ENODEV;
2171
2172 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2173 if (hso_net->mux_bulk_rx_urb_pool[i])
2174 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2175
2176 }
2177 if (hso_net->mux_bulk_tx_urb)
2178 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2179
2180 return 0;
2181 }
2182
2183 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2184 {
2185 int i, result = 0;
2186 struct hso_serial *serial = dev2ser(hso_dev);
2187
2188 if (!serial)
2189 return -ENODEV;
2190
2191 /* If it is not the MUX port fill in and submit a bulk urb (already
2192 * allocated in hso_serial_start) */
2193 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2194 for (i = 0; i < serial->num_rx_urbs; i++) {
2195 usb_fill_bulk_urb(serial->rx_urb[i],
2196 serial->parent->usb,
2197 usb_rcvbulkpipe(serial->parent->usb,
2198 serial->in_endp->
2199 bEndpointAddress &
2200 0x7F),
2201 serial->rx_data[i],
2202 serial->rx_data_length,
2203 hso_std_serial_read_bulk_callback,
2204 serial);
2205 result = usb_submit_urb(serial->rx_urb[i], flags);
2206 if (result) {
2207 dev_warn(&serial->parent->usb->dev,
2208 "Failed to submit urb - res %d\n",
2209 result);
2210 break;
2211 }
2212 }
2213 } else {
2214 mutex_lock(&serial->shared_int->shared_int_lock);
2215 if (!serial->shared_int->use_count) {
2216 result =
2217 hso_mux_submit_intr_urb(serial->shared_int,
2218 hso_dev->usb, flags);
2219 }
2220 serial->shared_int->use_count++;
2221 mutex_unlock(&serial->shared_int->shared_int_lock);
2222 }
2223 if (serial->tiocmget)
2224 tiocmget_submit_urb(serial,
2225 serial->tiocmget,
2226 serial->parent->usb);
2227 return result;
2228 }
2229
2230 static int hso_stop_serial_device(struct hso_device *hso_dev)
2231 {
2232 int i;
2233 struct hso_serial *serial = dev2ser(hso_dev);
2234 struct hso_tiocmget *tiocmget;
2235
2236 if (!serial)
2237 return -ENODEV;
2238
2239 for (i = 0; i < serial->num_rx_urbs; i++) {
2240 if (serial->rx_urb[i]) {
2241 usb_kill_urb(serial->rx_urb[i]);
2242 serial->rx_urb_filled[i] = 0;
2243 }
2244 }
2245 serial->curr_rx_urb_idx = 0;
2246 serial->curr_rx_urb_offset = 0;
2247
2248 if (serial->tx_urb)
2249 usb_kill_urb(serial->tx_urb);
2250
2251 if (serial->shared_int) {
2252 mutex_lock(&serial->shared_int->shared_int_lock);
2253 if (serial->shared_int->use_count &&
2254 (--serial->shared_int->use_count == 0)) {
2255 struct urb *urb;
2256
2257 urb = serial->shared_int->shared_intr_urb;
2258 if (urb)
2259 usb_kill_urb(urb);
2260 }
2261 mutex_unlock(&serial->shared_int->shared_int_lock);
2262 }
2263 tiocmget = serial->tiocmget;
2264 if (tiocmget) {
2265 wake_up_interruptible(&tiocmget->waitq);
2266 usb_kill_urb(tiocmget->urb);
2267 }
2268
2269 return 0;
2270 }
2271
2272 static void hso_serial_common_free(struct hso_serial *serial)
2273 {
2274 int i;
2275
2276 if (serial->parent->dev)
2277 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2278
2279 tty_unregister_device(tty_drv, serial->minor);
2280
2281 for (i = 0; i < serial->num_rx_urbs; i++) {
2282 /* unlink and free RX URB */
2283 usb_free_urb(serial->rx_urb[i]);
2284 /* free the RX buffer */
2285 kfree(serial->rx_data[i]);
2286 }
2287
2288 /* unlink and free TX URB */
2289 usb_free_urb(serial->tx_urb);
2290 kfree(serial->tx_data);
2291 }
2292
2293 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2294 int rx_size, int tx_size)
2295 {
2296 struct device *dev;
2297 int minor;
2298 int i;
2299
2300 minor = get_free_serial_index();
2301 if (minor < 0)
2302 goto exit;
2303
2304 /* register our minor number */
2305 serial->parent->dev = tty_register_device(tty_drv, minor,
2306 &serial->parent->interface->dev);
2307 dev = serial->parent->dev;
2308 dev->driver_data = serial->parent;
2309 i = device_create_file(dev, &dev_attr_hsotype);
2310
2311 /* fill in specific data for later use */
2312 serial->minor = minor;
2313 serial->magic = HSO_SERIAL_MAGIC;
2314 spin_lock_init(&serial->serial_lock);
2315 serial->num_rx_urbs = num_urbs;
2316
2317 /* RX, allocate urb and initialize */
2318
2319 /* prepare our RX buffer */
2320 serial->rx_data_length = rx_size;
2321 for (i = 0; i < serial->num_rx_urbs; i++) {
2322 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2323 if (!serial->rx_urb[i]) {
2324 dev_err(dev, "Could not allocate urb?\n");
2325 goto exit;
2326 }
2327 serial->rx_urb[i]->transfer_buffer = NULL;
2328 serial->rx_urb[i]->transfer_buffer_length = 0;
2329 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2330 GFP_KERNEL);
2331 if (!serial->rx_data[i]) {
2332 dev_err(dev, "%s - Out of memory\n", __func__);
2333 goto exit;
2334 }
2335 }
2336
2337 /* TX, allocate urb and initialize */
2338 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2339 if (!serial->tx_urb) {
2340 dev_err(dev, "Could not allocate urb?\n");
2341 goto exit;
2342 }
2343 serial->tx_urb->transfer_buffer = NULL;
2344 serial->tx_urb->transfer_buffer_length = 0;
2345 /* prepare our TX buffer */
2346 serial->tx_data_count = 0;
2347 serial->tx_buffer_count = 0;
2348 serial->tx_data_length = tx_size;
2349 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2350 if (!serial->tx_data) {
2351 dev_err(dev, "%s - Out of memory", __func__);
2352 goto exit;
2353 }
2354 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2355 if (!serial->tx_buffer) {
2356 dev_err(dev, "%s - Out of memory", __func__);
2357 goto exit;
2358 }
2359
2360 return 0;
2361 exit:
2362 hso_serial_common_free(serial);
2363 return -1;
2364 }
2365
2366 /* Creates a general hso device */
2367 static struct hso_device *hso_create_device(struct usb_interface *intf,
2368 int port_spec)
2369 {
2370 struct hso_device *hso_dev;
2371
2372 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2373 if (!hso_dev)
2374 return NULL;
2375
2376 hso_dev->port_spec = port_spec;
2377 hso_dev->usb = interface_to_usbdev(intf);
2378 hso_dev->interface = intf;
2379 kref_init(&hso_dev->ref);
2380 mutex_init(&hso_dev->mutex);
2381
2382 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2383 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2384
2385 return hso_dev;
2386 }
2387
2388 /* Removes a network device in the network device table */
2389 static int remove_net_device(struct hso_device *hso_dev)
2390 {
2391 int i;
2392
2393 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2394 if (network_table[i] == hso_dev) {
2395 network_table[i] = NULL;
2396 break;
2397 }
2398 }
2399 if (i == HSO_MAX_NET_DEVICES)
2400 return -1;
2401 return 0;
2402 }
2403
2404 /* Frees our network device */
2405 static void hso_free_net_device(struct hso_device *hso_dev)
2406 {
2407 int i;
2408 struct hso_net *hso_net = dev2net(hso_dev);
2409
2410 if (!hso_net)
2411 return;
2412
2413 /* start freeing */
2414 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2415 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2416 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2417 }
2418 usb_free_urb(hso_net->mux_bulk_tx_urb);
2419 kfree(hso_net->mux_bulk_tx_buf);
2420
2421 remove_net_device(hso_net->parent);
2422
2423 if (hso_net->net) {
2424 unregister_netdev(hso_net->net);
2425 free_netdev(hso_net->net);
2426 }
2427
2428 kfree(hso_dev);
2429 }
2430
2431 /* initialize the network interface */
2432 static void hso_net_init(struct net_device *net)
2433 {
2434 struct hso_net *hso_net = netdev_priv(net);
2435
2436 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2437
2438 /* fill in the other fields */
2439 net->open = hso_net_open;
2440 net->stop = hso_net_close;
2441 net->hard_start_xmit = hso_net_start_xmit;
2442 net->tx_timeout = hso_net_tx_timeout;
2443 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2444 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2445 net->type = ARPHRD_NONE;
2446 net->mtu = DEFAULT_MTU - 14;
2447 net->tx_queue_len = 10;
2448 SET_ETHTOOL_OPS(net, &ops);
2449
2450 /* and initialize the semaphore */
2451 spin_lock_init(&hso_net->net_lock);
2452 }
2453
2454 /* Adds a network device in the network device table */
2455 static int add_net_device(struct hso_device *hso_dev)
2456 {
2457 int i;
2458
2459 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2460 if (network_table[i] == NULL) {
2461 network_table[i] = hso_dev;
2462 break;
2463 }
2464 }
2465 if (i == HSO_MAX_NET_DEVICES)
2466 return -1;
2467 return 0;
2468 }
2469
2470 static int hso_radio_toggle(void *data, enum rfkill_state state)
2471 {
2472 struct hso_device *hso_dev = data;
2473 int enabled = (state == RFKILL_STATE_ON);
2474 int rv;
2475
2476 mutex_lock(&hso_dev->mutex);
2477 if (hso_dev->usb_gone)
2478 rv = 0;
2479 else
2480 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2481 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2482 USB_CTRL_SET_TIMEOUT);
2483 mutex_unlock(&hso_dev->mutex);
2484 return rv;
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 hso_net->rfkill = rfkill_allocate(&interface_to_usbdev(interface)->dev,
2496 RFKILL_TYPE_WWAN);
2497 if (!hso_net->rfkill) {
2498 dev_err(dev, "%s - Out of memory\n", __func__);
2499 return;
2500 }
2501 rfkn = kzalloc(20, GFP_KERNEL);
2502 if (!rfkn) {
2503 rfkill_free(hso_net->rfkill);
2504 hso_net->rfkill = NULL;
2505 dev_err(dev, "%s - Out of memory\n", __func__);
2506 return;
2507 }
2508 snprintf(rfkn, 20, "hso-%d",
2509 interface->altsetting->desc.bInterfaceNumber);
2510 hso_net->rfkill->name = rfkn;
2511 hso_net->rfkill->state = RFKILL_STATE_ON;
2512 hso_net->rfkill->data = hso_dev;
2513 hso_net->rfkill->toggle_radio = hso_radio_toggle;
2514 if (rfkill_register(hso_net->rfkill) < 0) {
2515 kfree(rfkn);
2516 hso_net->rfkill->name = NULL;
2517 rfkill_free(hso_net->rfkill);
2518 hso_net->rfkill = NULL;
2519 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2520 return;
2521 }
2522 }
2523
2524 /* Creates our network device */
2525 static struct hso_device *hso_create_net_device(struct usb_interface *interface)
2526 {
2527 int result, i;
2528 struct net_device *net;
2529 struct hso_net *hso_net;
2530 struct hso_device *hso_dev;
2531
2532 hso_dev = hso_create_device(interface, HSO_INTF_MUX | HSO_PORT_NETWORK);
2533 if (!hso_dev)
2534 return NULL;
2535
2536 /* allocate our network device, then we can put in our private data */
2537 /* call hso_net_init to do the basic initialization */
2538 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2539 if (!net) {
2540 dev_err(&interface->dev, "Unable to create ethernet device\n");
2541 goto exit;
2542 }
2543
2544 hso_net = netdev_priv(net);
2545
2546 hso_dev->port_data.dev_net = hso_net;
2547 hso_net->net = net;
2548 hso_net->parent = hso_dev;
2549
2550 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2551 USB_DIR_IN);
2552 if (!hso_net->in_endp) {
2553 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2554 goto exit;
2555 }
2556 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2557 USB_DIR_OUT);
2558 if (!hso_net->out_endp) {
2559 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2560 goto exit;
2561 }
2562 SET_NETDEV_DEV(net, &interface->dev);
2563
2564 /* registering our net device */
2565 result = register_netdev(net);
2566 if (result) {
2567 dev_err(&interface->dev, "Failed to register device\n");
2568 goto exit;
2569 }
2570
2571 /* start allocating */
2572 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2573 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2574 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2575 dev_err(&interface->dev, "Could not allocate rx urb\n");
2576 goto exit;
2577 }
2578 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2579 GFP_KERNEL);
2580 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2581 dev_err(&interface->dev, "Could not allocate rx buf\n");
2582 goto exit;
2583 }
2584 }
2585 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2586 if (!hso_net->mux_bulk_tx_urb) {
2587 dev_err(&interface->dev, "Could not allocate tx urb\n");
2588 goto exit;
2589 }
2590 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2591 if (!hso_net->mux_bulk_tx_buf) {
2592 dev_err(&interface->dev, "Could not allocate tx buf\n");
2593 goto exit;
2594 }
2595
2596 add_net_device(hso_dev);
2597
2598 hso_log_port(hso_dev);
2599
2600 hso_create_rfkill(hso_dev, interface);
2601
2602 return hso_dev;
2603 exit:
2604 hso_free_net_device(hso_dev);
2605 return NULL;
2606 }
2607
2608 static void hso_free_tiomget(struct hso_serial *serial)
2609 {
2610 struct hso_tiocmget *tiocmget = serial->tiocmget;
2611 if (tiocmget) {
2612 kfree(tiocmget);
2613 if (tiocmget->urb) {
2614 usb_free_urb(tiocmget->urb);
2615 tiocmget->urb = NULL;
2616 }
2617 serial->tiocmget = NULL;
2618
2619 }
2620 }
2621
2622 /* Frees an AT channel ( goes for both mux and non-mux ) */
2623 static void hso_free_serial_device(struct hso_device *hso_dev)
2624 {
2625 struct hso_serial *serial = dev2ser(hso_dev);
2626
2627 if (!serial)
2628 return;
2629 set_serial_by_index(serial->minor, NULL);
2630
2631 hso_serial_common_free(serial);
2632
2633 if (serial->shared_int) {
2634 mutex_lock(&serial->shared_int->shared_int_lock);
2635 if (--serial->shared_int->ref_count == 0)
2636 hso_free_shared_int(serial->shared_int);
2637 else
2638 mutex_unlock(&serial->shared_int->shared_int_lock);
2639 }
2640 hso_free_tiomget(serial);
2641 kfree(serial);
2642 kfree(hso_dev);
2643 }
2644
2645 /* Creates a bulk AT channel */
2646 static struct hso_device *hso_create_bulk_serial_device(
2647 struct usb_interface *interface, int port)
2648 {
2649 struct hso_device *hso_dev;
2650 struct hso_serial *serial;
2651 int num_urbs;
2652 struct hso_tiocmget *tiocmget;
2653
2654 hso_dev = hso_create_device(interface, port);
2655 if (!hso_dev)
2656 return NULL;
2657
2658 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2659 if (!serial)
2660 goto exit;
2661
2662 serial->parent = hso_dev;
2663 hso_dev->port_data.dev_serial = serial;
2664
2665 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2666 num_urbs = 2;
2667 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2668 GFP_KERNEL);
2669 /* it isn't going to break our heart if serial->tiocmget
2670 * allocation fails don't bother checking this.
2671 */
2672 if (serial->tiocmget) {
2673 tiocmget = serial->tiocmget;
2674 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2675 if (tiocmget->urb) {
2676 mutex_init(&tiocmget->mutex);
2677 init_waitqueue_head(&tiocmget->waitq);
2678 tiocmget->endp = hso_get_ep(
2679 interface,
2680 USB_ENDPOINT_XFER_INT,
2681 USB_DIR_IN);
2682 } else
2683 hso_free_tiomget(serial);
2684 }
2685 }
2686 else
2687 num_urbs = 1;
2688
2689 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2690 BULK_URB_TX_SIZE))
2691 goto exit;
2692
2693 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2694 USB_DIR_IN);
2695 if (!serial->in_endp) {
2696 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2697 goto exit2;
2698 }
2699
2700 if (!
2701 (serial->out_endp =
2702 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2703 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2704 goto exit2;
2705 }
2706
2707 serial->write_data = hso_std_serial_write_data;
2708
2709 /* and record this serial */
2710 set_serial_by_index(serial->minor, serial);
2711
2712 /* setup the proc dirs and files if needed */
2713 hso_log_port(hso_dev);
2714
2715 /* done, return it */
2716 return hso_dev;
2717
2718 exit2:
2719 hso_serial_common_free(serial);
2720 exit:
2721 hso_free_tiomget(serial);
2722 kfree(serial);
2723 kfree(hso_dev);
2724 return NULL;
2725 }
2726
2727 /* Creates a multiplexed AT channel */
2728 static
2729 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2730 int port,
2731 struct hso_shared_int *mux)
2732 {
2733 struct hso_device *hso_dev;
2734 struct hso_serial *serial;
2735 int port_spec;
2736
2737 port_spec = HSO_INTF_MUX;
2738 port_spec &= ~HSO_PORT_MASK;
2739
2740 port_spec |= hso_mux_to_port(port);
2741 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2742 return NULL;
2743
2744 hso_dev = hso_create_device(interface, port_spec);
2745 if (!hso_dev)
2746 return NULL;
2747
2748 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2749 if (!serial)
2750 goto exit;
2751
2752 hso_dev->port_data.dev_serial = serial;
2753 serial->parent = hso_dev;
2754
2755 if (hso_serial_common_create
2756 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2757 goto exit;
2758
2759 serial->tx_data_length--;
2760 serial->write_data = hso_mux_serial_write_data;
2761
2762 serial->shared_int = mux;
2763 mutex_lock(&serial->shared_int->shared_int_lock);
2764 serial->shared_int->ref_count++;
2765 mutex_unlock(&serial->shared_int->shared_int_lock);
2766
2767 /* and record this serial */
2768 set_serial_by_index(serial->minor, serial);
2769
2770 /* setup the proc dirs and files if needed */
2771 hso_log_port(hso_dev);
2772
2773 /* done, return it */
2774 return hso_dev;
2775
2776 exit:
2777 if (serial) {
2778 tty_unregister_device(tty_drv, serial->minor);
2779 kfree(serial);
2780 }
2781 if (hso_dev)
2782 kfree(hso_dev);
2783 return NULL;
2784
2785 }
2786
2787 static void hso_free_shared_int(struct hso_shared_int *mux)
2788 {
2789 usb_free_urb(mux->shared_intr_urb);
2790 kfree(mux->shared_intr_buf);
2791 mutex_unlock(&mux->shared_int_lock);
2792 kfree(mux);
2793 }
2794
2795 static
2796 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2797 {
2798 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2799
2800 if (!mux)
2801 return NULL;
2802
2803 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2804 USB_DIR_IN);
2805 if (!mux->intr_endp) {
2806 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2807 goto exit;
2808 }
2809
2810 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2811 if (!mux->shared_intr_urb) {
2812 dev_err(&interface->dev, "Could not allocate intr urb?");
2813 goto exit;
2814 }
2815 mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize,
2816 GFP_KERNEL);
2817 if (!mux->shared_intr_buf) {
2818 dev_err(&interface->dev, "Could not allocate intr buf?");
2819 goto exit;
2820 }
2821
2822 mutex_init(&mux->shared_int_lock);
2823
2824 return mux;
2825
2826 exit:
2827 kfree(mux->shared_intr_buf);
2828 usb_free_urb(mux->shared_intr_urb);
2829 kfree(mux);
2830 return NULL;
2831 }
2832
2833 /* Gets the port spec for a certain interface */
2834 static int hso_get_config_data(struct usb_interface *interface)
2835 {
2836 struct usb_device *usbdev = interface_to_usbdev(interface);
2837 u8 config_data[17];
2838 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2839 s32 result;
2840
2841 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2842 0x86, 0xC0, 0, 0, config_data, 17,
2843 USB_CTRL_SET_TIMEOUT) != 0x11) {
2844 return -EIO;
2845 }
2846
2847 switch (config_data[if_num]) {
2848 case 0x0:
2849 result = 0;
2850 break;
2851 case 0x1:
2852 result = HSO_PORT_DIAG;
2853 break;
2854 case 0x2:
2855 result = HSO_PORT_GPS;
2856 break;
2857 case 0x3:
2858 result = HSO_PORT_GPS_CONTROL;
2859 break;
2860 case 0x4:
2861 result = HSO_PORT_APP;
2862 break;
2863 case 0x5:
2864 result = HSO_PORT_APP2;
2865 break;
2866 case 0x6:
2867 result = HSO_PORT_CONTROL;
2868 break;
2869 case 0x7:
2870 result = HSO_PORT_NETWORK;
2871 break;
2872 case 0x8:
2873 result = HSO_PORT_MODEM;
2874 break;
2875 case 0x9:
2876 result = HSO_PORT_MSD;
2877 break;
2878 case 0xa:
2879 result = HSO_PORT_PCSC;
2880 break;
2881 case 0xb:
2882 result = HSO_PORT_VOICE;
2883 break;
2884 default:
2885 result = 0;
2886 }
2887
2888 if (result)
2889 result |= HSO_INTF_BULK;
2890
2891 if (config_data[16] & 0x1)
2892 result |= HSO_INFO_CRC_BUG;
2893
2894 return result;
2895 }
2896
2897 /* called once for each interface upon device insertion */
2898 static int hso_probe(struct usb_interface *interface,
2899 const struct usb_device_id *id)
2900 {
2901 int mux, i, if_num, port_spec;
2902 unsigned char port_mask;
2903 struct hso_device *hso_dev = NULL;
2904 struct hso_shared_int *shared_int;
2905 struct hso_device *tmp_dev = NULL;
2906
2907 if_num = interface->altsetting->desc.bInterfaceNumber;
2908
2909 /* Get the interface/port specification from either driver_info or from
2910 * the device itself */
2911 if (id->driver_info)
2912 port_spec = ((u32 *)(id->driver_info))[if_num];
2913 else
2914 port_spec = hso_get_config_data(interface);
2915
2916 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2917 dev_err(&interface->dev, "Not our interface\n");
2918 return -ENODEV;
2919 }
2920 /* Check if we need to switch to alt interfaces prior to port
2921 * configuration */
2922 if (interface->num_altsetting > 1)
2923 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2924 interface->needs_remote_wakeup = 1;
2925
2926 /* Allocate new hso device(s) */
2927 switch (port_spec & HSO_INTF_MASK) {
2928 case HSO_INTF_MUX:
2929 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2930 /* Create the network device */
2931 if (!disable_net) {
2932 hso_dev = hso_create_net_device(interface);
2933 if (!hso_dev)
2934 goto exit;
2935 tmp_dev = hso_dev;
2936 }
2937 }
2938
2939 if (hso_get_mux_ports(interface, &port_mask))
2940 /* TODO: de-allocate everything */
2941 goto exit;
2942
2943 shared_int = hso_create_shared_int(interface);
2944 if (!shared_int)
2945 goto exit;
2946
2947 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2948 if (port_mask & i) {
2949 hso_dev = hso_create_mux_serial_device(
2950 interface, i, shared_int);
2951 if (!hso_dev)
2952 goto exit;
2953 }
2954 }
2955
2956 if (tmp_dev)
2957 hso_dev = tmp_dev;
2958 break;
2959
2960 case HSO_INTF_BULK:
2961 /* It's a regular bulk interface */
2962 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK)
2963 && !disable_net)
2964 hso_dev = hso_create_net_device(interface);
2965 else
2966 hso_dev =
2967 hso_create_bulk_serial_device(interface, port_spec);
2968 if (!hso_dev)
2969 goto exit;
2970 break;
2971 default:
2972 goto exit;
2973 }
2974
2975 /* save our data pointer in this device */
2976 usb_set_intfdata(interface, hso_dev);
2977
2978 /* done */
2979 return 0;
2980 exit:
2981 hso_free_interface(interface);
2982 return -ENODEV;
2983 }
2984
2985 /* device removed, cleaning up */
2986 static void hso_disconnect(struct usb_interface *interface)
2987 {
2988 hso_free_interface(interface);
2989
2990 /* remove reference of our private data */
2991 usb_set_intfdata(interface, NULL);
2992 }
2993
2994 static void async_get_intf(struct work_struct *data)
2995 {
2996 struct hso_device *hso_dev =
2997 container_of(data, struct hso_device, async_get_intf);
2998 usb_autopm_get_interface(hso_dev->interface);
2999 }
3000
3001 static void async_put_intf(struct work_struct *data)
3002 {
3003 struct hso_device *hso_dev =
3004 container_of(data, struct hso_device, async_put_intf);
3005 usb_autopm_put_interface(hso_dev->interface);
3006 }
3007
3008 static int hso_get_activity(struct hso_device *hso_dev)
3009 {
3010 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3011 if (!hso_dev->is_active) {
3012 hso_dev->is_active = 1;
3013 schedule_work(&hso_dev->async_get_intf);
3014 }
3015 }
3016
3017 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3018 return -EAGAIN;
3019
3020 usb_mark_last_busy(hso_dev->usb);
3021
3022 return 0;
3023 }
3024
3025 static int hso_put_activity(struct hso_device *hso_dev)
3026 {
3027 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3028 if (hso_dev->is_active) {
3029 hso_dev->is_active = 0;
3030 schedule_work(&hso_dev->async_put_intf);
3031 return -EAGAIN;
3032 }
3033 }
3034 hso_dev->is_active = 0;
3035 return 0;
3036 }
3037
3038 /* called by kernel when we need to suspend device */
3039 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3040 {
3041 int i, result;
3042
3043 /* Stop all serial ports */
3044 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3045 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3046 result = hso_stop_serial_device(serial_table[i]);
3047 if (result)
3048 goto out;
3049 }
3050 }
3051
3052 /* Stop all network ports */
3053 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3054 if (network_table[i] &&
3055 (network_table[i]->interface == iface)) {
3056 result = hso_stop_net_device(network_table[i]);
3057 if (result)
3058 goto out;
3059 }
3060 }
3061
3062 out:
3063 return 0;
3064 }
3065
3066 /* called by kernel when we need to resume device */
3067 static int hso_resume(struct usb_interface *iface)
3068 {
3069 int i, result = 0;
3070 struct hso_net *hso_net;
3071
3072 /* Start all serial ports */
3073 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3074 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3075 if (dev2ser(serial_table[i])->open_count) {
3076 result =
3077 hso_start_serial_device(serial_table[i], GFP_NOIO);
3078 hso_kick_transmit(dev2ser(serial_table[i]));
3079 if (result)
3080 goto out;
3081 }
3082 }
3083 }
3084
3085 /* Start all network ports */
3086 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3087 if (network_table[i] &&
3088 (network_table[i]->interface == iface)) {
3089 hso_net = dev2net(network_table[i]);
3090 if (hso_net->flags & IFF_UP) {
3091 /* First transmit any lingering data,
3092 then restart the device. */
3093 if (hso_net->skb_tx_buf) {
3094 dev_dbg(&iface->dev,
3095 "Transmitting"
3096 " lingering data\n");
3097 hso_net_start_xmit(hso_net->skb_tx_buf,
3098 hso_net->net);
3099 hso_net->skb_tx_buf = NULL;
3100 }
3101 result = hso_start_net_device(network_table[i]);
3102 if (result)
3103 goto out;
3104 }
3105 }
3106 }
3107
3108 out:
3109 return result;
3110 }
3111
3112 static void hso_serial_ref_free(struct kref *ref)
3113 {
3114 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3115
3116 hso_free_serial_device(hso_dev);
3117 }
3118
3119 static void hso_free_interface(struct usb_interface *interface)
3120 {
3121 struct hso_serial *hso_dev;
3122 struct tty_struct *tty;
3123 int i;
3124
3125 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3126 if (serial_table[i]
3127 && (serial_table[i]->interface == interface)) {
3128 hso_dev = dev2ser(serial_table[i]);
3129 spin_lock_irq(&hso_dev->serial_lock);
3130 tty = tty_kref_get(hso_dev->tty);
3131 spin_unlock_irq(&hso_dev->serial_lock);
3132 if (tty)
3133 tty_hangup(tty);
3134 mutex_lock(&hso_dev->parent->mutex);
3135 tty_kref_put(tty);
3136 hso_dev->parent->usb_gone = 1;
3137 mutex_unlock(&hso_dev->parent->mutex);
3138 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3139 }
3140 }
3141
3142 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3143 if (network_table[i]
3144 && (network_table[i]->interface == interface)) {
3145 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3146 /* hso_stop_net_device doesn't stop the net queue since
3147 * traffic needs to start it again when suspended */
3148 netif_stop_queue(dev2net(network_table[i])->net);
3149 hso_stop_net_device(network_table[i]);
3150 cancel_work_sync(&network_table[i]->async_put_intf);
3151 cancel_work_sync(&network_table[i]->async_get_intf);
3152 if (rfk)
3153 rfkill_unregister(rfk);
3154 hso_free_net_device(network_table[i]);
3155 }
3156 }
3157 }
3158
3159 /* Helper functions */
3160
3161 /* Get the endpoint ! */
3162 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3163 int type, int dir)
3164 {
3165 int i;
3166 struct usb_host_interface *iface = intf->cur_altsetting;
3167 struct usb_endpoint_descriptor *endp;
3168
3169 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3170 endp = &iface->endpoint[i].desc;
3171 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3172 (usb_endpoint_type(endp) == type))
3173 return endp;
3174 }
3175
3176 return NULL;
3177 }
3178
3179 /* Get the byte that describes which ports are enabled */
3180 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3181 {
3182 int i;
3183 struct usb_host_interface *iface = intf->cur_altsetting;
3184
3185 if (iface->extralen == 3) {
3186 *ports = iface->extra[2];
3187 return 0;
3188 }
3189
3190 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3191 if (iface->endpoint[i].extralen == 3) {
3192 *ports = iface->endpoint[i].extra[2];
3193 return 0;
3194 }
3195 }
3196
3197 return -1;
3198 }
3199
3200 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3201 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3202 struct usb_device *usb, gfp_t gfp)
3203 {
3204 int result;
3205
3206 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3207 usb_rcvintpipe(usb,
3208 shared_int->intr_endp->bEndpointAddress & 0x7F),
3209 shared_int->shared_intr_buf,
3210 shared_int->intr_endp->wMaxPacketSize,
3211 intr_callback, shared_int,
3212 shared_int->intr_endp->bInterval);
3213
3214 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3215 if (result)
3216 dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__,
3217 result);
3218
3219 return result;
3220 }
3221
3222 /* operations setup of the serial interface */
3223 static const struct tty_operations hso_serial_ops = {
3224 .open = hso_serial_open,
3225 .close = hso_serial_close,
3226 .write = hso_serial_write,
3227 .write_room = hso_serial_write_room,
3228 .ioctl = hso_serial_ioctl,
3229 .set_termios = hso_serial_set_termios,
3230 .chars_in_buffer = hso_serial_chars_in_buffer,
3231 .tiocmget = hso_serial_tiocmget,
3232 .tiocmset = hso_serial_tiocmset,
3233 .unthrottle = hso_unthrottle
3234 };
3235
3236 static struct usb_driver hso_driver = {
3237 .name = driver_name,
3238 .probe = hso_probe,
3239 .disconnect = hso_disconnect,
3240 .id_table = hso_ids,
3241 .suspend = hso_suspend,
3242 .resume = hso_resume,
3243 .reset_resume = hso_resume,
3244 .supports_autosuspend = 1,
3245 };
3246
3247 static int __init hso_init(void)
3248 {
3249 int i;
3250 int result;
3251
3252 /* put it in the log */
3253 printk(KERN_INFO "hso: %s\n", version);
3254
3255 /* Initialise the serial table semaphore and table */
3256 spin_lock_init(&serial_table_lock);
3257 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3258 serial_table[i] = NULL;
3259
3260 /* allocate our driver using the proper amount of supported minors */
3261 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3262 if (!tty_drv)
3263 return -ENOMEM;
3264
3265 /* fill in all needed values */
3266 tty_drv->magic = TTY_DRIVER_MAGIC;
3267 tty_drv->owner = THIS_MODULE;
3268 tty_drv->driver_name = driver_name;
3269 tty_drv->name = tty_filename;
3270
3271 /* if major number is provided as parameter, use that one */
3272 if (tty_major)
3273 tty_drv->major = tty_major;
3274
3275 tty_drv->minor_start = 0;
3276 tty_drv->num = HSO_SERIAL_TTY_MINORS;
3277 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3278 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3279 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3280 tty_drv->init_termios = tty_std_termios;
3281 hso_init_termios(&tty_drv->init_termios);
3282 tty_set_operations(tty_drv, &hso_serial_ops);
3283
3284 /* register the tty driver */
3285 result = tty_register_driver(tty_drv);
3286 if (result) {
3287 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3288 __func__, result);
3289 return result;
3290 }
3291
3292 /* register this module as an usb driver */
3293 result = usb_register(&hso_driver);
3294 if (result) {
3295 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3296 result);
3297 /* cleanup serial interface */
3298 tty_unregister_driver(tty_drv);
3299 return result;
3300 }
3301
3302 /* done */
3303 return 0;
3304 }
3305
3306 static void __exit hso_exit(void)
3307 {
3308 printk(KERN_INFO "hso: unloaded\n");
3309
3310 tty_unregister_driver(tty_drv);
3311 /* deregister the usb driver */
3312 usb_deregister(&hso_driver);
3313 }
3314
3315 /* Module definitions */
3316 module_init(hso_init);
3317 module_exit(hso_exit);
3318
3319 MODULE_AUTHOR(MOD_AUTHOR);
3320 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3321 MODULE_LICENSE(MOD_LICENSE);
3322 MODULE_INFO(Version, DRIVER_VERSION);
3323
3324 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3325 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3326 module_param(debug, int, S_IRUGO | S_IWUSR);
3327
3328 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3329 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3330 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3331
3332 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3333 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3334 module_param(disable_net, int, S_IRUGO | S_IWUSR);
Linux 2.6 libata-dev (mirror)