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[net-next-2.6.git] / drivers / net / usb / hso.c
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72dc1c09
GKH		 1/******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
6 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
7 * <ajb@spheresystems.co.uk>
8 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
9 * Copyright (C) 2008 Novell, Inc.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
23 * USA
24 *
25 *
26 *****************************************************************************/
27
28/******************************************************************************
29 *
30 * Description of the device:
31 *
32 * Interface 0: Contains the IP network interface on the bulk end points.
33 * The multiplexed serial ports are using the interrupt and
34 * control endpoints.
35 * Interrupt contains a bitmap telling which multiplexed
36 * serialport needs servicing.
37 *
38 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
39 * port is opened, as this have a huge impact on the network port
40 * throughput.
41 *
cd90ee17
DM		 42 * Interface 2: Standard modem interface - circuit switched interface, should
43 * not be used.
72dc1c09
GKH		 44 *
45 *****************************************************************************/
46
47#include <linux/sched.h>
48#include <linux/slab.h>
49#include <linux/init.h>
50#include <linux/delay.h>
51#include <linux/netdevice.h>
52#include <linux/module.h>
53#include <linux/ethtool.h>
54#include <linux/usb.h>
55#include <linux/timer.h>
56#include <linux/tty.h>
57#include <linux/tty_driver.h>
58#include <linux/tty_flip.h>
59#include <linux/kmod.h>
60#include <linux/rfkill.h>
61#include <linux/ip.h>
62#include <linux/uaccess.h>
63#include <linux/usb/cdc.h>
64#include <net/arp.h>
65#include <asm/byteorder.h>
66
67
68#define DRIVER_VERSION "1.2"
69#define MOD_AUTHOR "Option Wireless"
70#define MOD_DESCRIPTION "USB High Speed Option driver"
71#define MOD_LICENSE "GPL"
72
73#define HSO_MAX_NET_DEVICES 10
74#define HSO__MAX_MTU 2048
75#define DEFAULT_MTU 1500
76#define DEFAULT_MRU 1500
77
78#define CTRL_URB_RX_SIZE 1024
79#define CTRL_URB_TX_SIZE 64
80
81#define BULK_URB_RX_SIZE 4096
82#define BULK_URB_TX_SIZE 8192
83
84#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
85#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
86#define MUX_BULK_RX_BUF_COUNT 4
87#define USB_TYPE_OPTION_VENDOR 0x20
88
89/* These definitions are used with the struct hso_net flags element */
90/* - use *_bit operations on it. (bit indices not values.) */
91#define HSO_NET_RUNNING 0
92
93#define HSO_NET_TX_TIMEOUT (HZ*10)
94
72dc1c09
GKH		 95#define HSO_SERIAL_MAGIC 0x48534f31
96
97/* Number of ttys to handle */
98#define HSO_SERIAL_TTY_MINORS 256
99
100#define MAX_RX_URBS 2
101
0235f641
GKH		 102static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
103{
104 if (tty)
105 return tty->driver_data;
106 return NULL;
107}
72dc1c09
GKH		 108
109/*****************************************************************************/
110/* Debugging functions */
111/*****************************************************************************/
112#define D__(lvl_, fmt, arg...) \
113 do { \
114 printk(lvl_ "[%d:%s]: " fmt "\n", \
115 __LINE__, __func__, ## arg); \
116 } while (0)
117
118#define D_(lvl, args...) \
119 do { \
120 if (lvl & debug) \
121 D__(KERN_INFO, args); \
122 } while (0)
123
124#define D1(args...) D_(0x01, ##args)
125#define D2(args...) D_(0x02, ##args)
126#define D3(args...) D_(0x04, ##args)
127#define D4(args...) D_(0x08, ##args)
128#define D5(args...) D_(0x10, ##args)
129
130/*****************************************************************************/
131/* Enumerators */
132/*****************************************************************************/
133enum pkt_parse_state {
134 WAIT_IP,
135 WAIT_DATA,
136 WAIT_SYNC
137};
138
139/*****************************************************************************/
140/* Structs */
141/*****************************************************************************/
142
143struct hso_shared_int {
144 struct usb_endpoint_descriptor *intr_endp;
145 void *shared_intr_buf;
146 struct urb *shared_intr_urb;
147 struct usb_device *usb;
148 int use_count;
149 int ref_count;
150 struct mutex shared_int_lock;
151};
152
153struct hso_net {
154 struct hso_device *parent;
155 struct net_device *net;
156 struct rfkill *rfkill;
157
158 struct usb_endpoint_descriptor *in_endp;
159 struct usb_endpoint_descriptor *out_endp;
160
161 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
162 struct urb *mux_bulk_tx_urb;
163 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
164 void *mux_bulk_tx_buf;
165
166 struct sk_buff *skb_rx_buf;
167 struct sk_buff *skb_tx_buf;
168
169 enum pkt_parse_state rx_parse_state;
170 spinlock_t net_lock;
171
172 unsigned short rx_buf_size;
173 unsigned short rx_buf_missing;
174 struct iphdr rx_ip_hdr;
175
176 unsigned long flags;
177};
178
8ef5ba63
DJB		 179enum rx_ctrl_state{
180 RX_IDLE,
181 RX_SENT,
182 RX_PENDING
183};
184
72dc1c09
GKH		 185struct hso_serial {
186 struct hso_device *parent;
187 int magic;
188 u8 minor;
189
190 struct hso_shared_int *shared_int;
191
192 /* rx/tx urb could be either a bulk urb or a control urb depending
193 on which serial port it is used on. */
194 struct urb *rx_urb[MAX_RX_URBS];
195 u8 num_rx_urbs;
196 u8 *rx_data[MAX_RX_URBS];
197 u16 rx_data_length; /* should contain allocated length */
198
199 struct urb *tx_urb;
200 u8 *tx_data;
201 u8 *tx_buffer;
202 u16 tx_data_length; /* should contain allocated length */
203 u16 tx_data_count;
204 u16 tx_buffer_count;
205 struct usb_ctrlrequest ctrl_req_tx;
206 struct usb_ctrlrequest ctrl_req_rx;
207
208 struct usb_endpoint_descriptor *in_endp;
209 struct usb_endpoint_descriptor *out_endp;
210
8ef5ba63 211 enum rx_ctrl_state rx_state;
72dc1c09
GKH		 212 u8 rts_state;
213 u8 dtr_state;
214 unsigned tx_urb_used:1;
215
216 /* from usb_serial_port */
217 struct tty_struct *tty;
218 int open_count;
219 spinlock_t serial_lock;
220
221 int (*write_data) (struct hso_serial *serial);
8ef5ba63
DJB		 222 /* Hacks required to get flow control
223 * working on the serial receive buffers
224 * so as not to drop characters on the floor.
225 */
226 int curr_rx_urb_idx;
227 u16 curr_rx_urb_offset;
228 u8 rx_urb_filled[MAX_RX_URBS];
229 struct tasklet_struct unthrottle_tasklet;
230 struct work_struct retry_unthrottle_workqueue;
72dc1c09
GKH		 231};
232
52429eb2
DJB		 233struct hso_mutex_t {
234 struct mutex mutex;
235 u8 allocated;
236};
237
72dc1c09
GKH		 238struct hso_device {
239 union {
240 struct hso_serial *dev_serial;
241 struct hso_net *dev_net;
242 } port_data;
243
244 u32 port_spec;
245
246 u8 is_active;
247 u8 usb_gone;
248 struct work_struct async_get_intf;
249 struct work_struct async_put_intf;
250
251 struct usb_device *usb;
252 struct usb_interface *interface;
253
254 struct device *dev;
255 struct kref ref;
52429eb2 256 struct hso_mutex_t *mutex;
72dc1c09
GKH		 257};
258
259/* Type of interface */
260#define HSO_INTF_MASK 0xFF00
261#define HSO_INTF_MUX 0x0100
262#define HSO_INTF_BULK 0x0200
263
264/* Type of port */
265#define HSO_PORT_MASK 0xFF
266#define HSO_PORT_NO_PORT 0x0
267#define HSO_PORT_CONTROL 0x1
268#define HSO_PORT_APP 0x2
269#define HSO_PORT_GPS 0x3
270#define HSO_PORT_PCSC 0x4
271#define HSO_PORT_APP2 0x5
272#define HSO_PORT_GPS_CONTROL 0x6
273#define HSO_PORT_MSD 0x7
274#define HSO_PORT_VOICE 0x8
275#define HSO_PORT_DIAG2 0x9
276#define HSO_PORT_DIAG 0x10
277#define HSO_PORT_MODEM 0x11
278#define HSO_PORT_NETWORK 0x12
279
280/* Additional device info */
281#define HSO_INFO_MASK 0xFF000000
282#define HSO_INFO_CRC_BUG 0x01000000
283
284/*****************************************************************************/
285/* Prototypes */
286/*****************************************************************************/
287/* Serial driver functions */
288static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
289 unsigned int set, unsigned int clear);
290static void ctrl_callback(struct urb *urb);
8ef5ba63 291static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
72dc1c09
GKH		 292static void hso_kick_transmit(struct hso_serial *serial);
293/* Helper functions */
294static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
295 struct usb_device *usb, gfp_t gfp);
296static void log_usb_status(int status, const char *function);
297static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
298 int type, int dir);
299static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
300static void hso_free_interface(struct usb_interface *intf);
301static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
302static int hso_stop_serial_device(struct hso_device *hso_dev);
303static int hso_start_net_device(struct hso_device *hso_dev);
304static void hso_free_shared_int(struct hso_shared_int *shared_int);
305static int hso_stop_net_device(struct hso_device *hso_dev);
306static void hso_serial_ref_free(struct kref *ref);
8ef5ba63
DJB		 307static void hso_std_serial_read_bulk_callback(struct urb *urb);
308static int hso_mux_serial_read(struct hso_serial *serial);
72dc1c09
GKH		 309static void async_get_intf(struct work_struct *data);
310static void async_put_intf(struct work_struct *data);
311static int hso_put_activity(struct hso_device *hso_dev);
312static int hso_get_activity(struct hso_device *hso_dev);
cd90ee17 313
72dc1c09
GKH		 314/*****************************************************************************/
315/* Helping functions */
316/*****************************************************************************/
317
318/* #define DEBUG */
319
0235f641
GKH		 320static inline struct hso_net *dev2net(struct hso_device *hso_dev)
321{
322 return hso_dev->port_data.dev_net;
323}
324
325static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
326{
327 return hso_dev->port_data.dev_serial;
328}
72dc1c09
GKH		 329
330/* Debugging functions */
331#ifdef DEBUG
332static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
333 unsigned int len)
334{
0235f641 335 static char name[255];
72dc1c09 336
0235f641
GKH		 337 sprintf(name, "hso[%d:%s]", line_count, func_name);
338 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
72dc1c09
GKH		 339}
340
341#define DUMP(buf_, len_) \
342 dbg_dump(__LINE__, __func__, buf_, len_)
343
344#define DUMP1(buf_, len_) \
345 do { \
346 if (0x01 & debug) \
347 DUMP(buf_, len_); \
348 } while (0)
349#else
350#define DUMP(buf_, len_)
351#define DUMP1(buf_, len_)
352#endif
353
354/* module parameters */
355static int debug;
356static int tty_major;
357static int disable_net;
358
359/* driver info */
360static const char driver_name[] = "hso";
361static const char tty_filename[] = "ttyHS";
362static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
363/* the usb driver itself (registered in hso_init) */
364static struct usb_driver hso_driver;
365/* serial structures */
366static struct tty_driver *tty_drv;
367static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
368static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
369static spinlock_t serial_table_lock;
370static struct ktermios *hso_serial_termios[HSO_SERIAL_TTY_MINORS];
371static struct ktermios *hso_serial_termios_locked[HSO_SERIAL_TTY_MINORS];
52429eb2
DJB		 372/* hso_mutex_table has to be declared statically as hso_device
373 * is freed in hso_serial_open & hso_serial_close while
374 * the mutex is still in use.
375 */
376#define HSO_NUM_MUTEXES (HSO_SERIAL_TTY_MINORS+HSO_MAX_NET_DEVICES)
377static struct hso_mutex_t hso_mutex_table[HSO_NUM_MUTEXES];
378static spinlock_t hso_mutex_lock;
72dc1c09
GKH		 379
380static const s32 default_port_spec[] = {
381 HSO_INTF_MUX | HSO_PORT_NETWORK,
382 HSO_INTF_BULK | HSO_PORT_DIAG,
383 HSO_INTF_BULK | HSO_PORT_MODEM,
384 0
385};
386
387static const s32 icon321_port_spec[] = {
388 HSO_INTF_MUX | HSO_PORT_NETWORK,
389 HSO_INTF_BULK | HSO_PORT_DIAG2,
390 HSO_INTF_BULK | HSO_PORT_MODEM,
391 HSO_INTF_BULK | HSO_PORT_DIAG,
392 0
393};
394
395#define default_port_device(vendor, product) \
396 USB_DEVICE(vendor, product), \
397 .driver_info = (kernel_ulong_t)default_port_spec
398
399#define icon321_port_device(vendor, product) \
400 USB_DEVICE(vendor, product), \
401 .driver_info = (kernel_ulong_t)icon321_port_spec
402
403/* list of devices we support */
404static const struct usb_device_id hso_ids[] = {
405 {default_port_device(0x0af0, 0x6711)},
406 {default_port_device(0x0af0, 0x6731)},
407 {default_port_device(0x0af0, 0x6751)},
408 {default_port_device(0x0af0, 0x6771)},
409 {default_port_device(0x0af0, 0x6791)},
410 {default_port_device(0x0af0, 0x6811)},
411 {default_port_device(0x0af0, 0x6911)},
412 {default_port_device(0x0af0, 0x6951)},
413 {default_port_device(0x0af0, 0x6971)},
414 {default_port_device(0x0af0, 0x7011)},
415 {default_port_device(0x0af0, 0x7031)},
416 {default_port_device(0x0af0, 0x7051)},
417 {default_port_device(0x0af0, 0x7071)},
418 {default_port_device(0x0af0, 0x7111)},
419 {default_port_device(0x0af0, 0x7211)},
420 {default_port_device(0x0af0, 0x7251)},
421 {default_port_device(0x0af0, 0x7271)},
422 {default_port_device(0x0af0, 0x7311)},
423 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
424 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
425 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
95eacee8 426 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
72dc1c09
GKH		 427 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
428 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
429 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
430 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
431 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
bab04c3a
DJB		 432 {USB_DEVICE(0x0af0, 0x7701)},
433 {USB_DEVICE(0x0af0, 0x7801)},
434 {USB_DEVICE(0x0af0, 0x7901)},
435 {USB_DEVICE(0x0af0, 0x7361)},
436 {icon321_port_device(0x0af0, 0xd051)},
72dc1c09
GKH		 437 {}
438};
439MODULE_DEVICE_TABLE(usb, hso_ids);
440
441/* Sysfs attribute */
442static ssize_t hso_sysfs_show_porttype(struct device *dev,
443 struct device_attribute *attr,
444 char *buf)
445{
446 struct hso_device *hso_dev = dev->driver_data;
447 char *port_name;
448
449 if (!hso_dev)
450 return 0;
451
452 switch (hso_dev->port_spec & HSO_PORT_MASK) {
453 case HSO_PORT_CONTROL:
454 port_name = "Control";
455 break;
456 case HSO_PORT_APP:
457 port_name = "Application";
458 break;
459 case HSO_PORT_APP2:
460 port_name = "Application2";
461 break;
462 case HSO_PORT_GPS:
463 port_name = "GPS";
464 break;
465 case HSO_PORT_GPS_CONTROL:
466 port_name = "GPS Control";
467 break;
468 case HSO_PORT_PCSC:
469 port_name = "PCSC";
470 break;
471 case HSO_PORT_DIAG:
472 port_name = "Diagnostic";
473 break;
474 case HSO_PORT_DIAG2:
475 port_name = "Diagnostic2";
476 break;
477 case HSO_PORT_MODEM:
478 port_name = "Modem";
479 break;
480 case HSO_PORT_NETWORK:
481 port_name = "Network";
482 break;
483 default:
484 port_name = "Unknown";
485 break;
486 }
487
488 return sprintf(buf, "%s\n", port_name);
489}
490static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
491
8ef5ba63
DJB		 492static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
493{
494 int idx;
495
496 for (idx = 0; idx < serial->num_rx_urbs; idx++)
497 if (serial->rx_urb[idx] == urb)
498 return idx;
499 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
500 return -1;
501}
502
72dc1c09
GKH		 503/* converts mux value to a port spec value */
504static u32 hso_mux_to_port(int mux)
505{
506 u32 result;
507
508 switch (mux) {
509 case 0x1:
510 result = HSO_PORT_CONTROL;
511 break;
512 case 0x2:
513 result = HSO_PORT_APP;
514 break;
515 case 0x4:
516 result = HSO_PORT_PCSC;
517 break;
518 case 0x8:
519 result = HSO_PORT_GPS;
520 break;
521 case 0x10:
522 result = HSO_PORT_APP2;
523 break;
524 default:
525 result = HSO_PORT_NO_PORT;
526 }
527 return result;
528}
529
530/* converts port spec value to a mux value */
531static u32 hso_port_to_mux(int port)
532{
533 u32 result;
534
535 switch (port & HSO_PORT_MASK) {
536 case HSO_PORT_CONTROL:
537 result = 0x0;
538 break;
539 case HSO_PORT_APP:
540 result = 0x1;
541 break;
542 case HSO_PORT_PCSC:
543 result = 0x2;
544 break;
545 case HSO_PORT_GPS:
546 result = 0x3;
547 break;
548 case HSO_PORT_APP2:
549 result = 0x4;
550 break;
551 default:
552 result = 0x0;
553 }
554 return result;
555}
556
557static struct hso_serial *get_serial_by_shared_int_and_type(
558 struct hso_shared_int *shared_int,
559 int mux)
560{
561 int i, port;
562
563 port = hso_mux_to_port(mux);
564
565 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
566 if (serial_table[i]
567 && (dev2ser(serial_table[i])->shared_int == shared_int)
568 && ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
569 return dev2ser(serial_table[i]);
570 }
571 }
572
573 return NULL;
574}
575
576static struct hso_serial *get_serial_by_index(unsigned index)
577{
0235f641 578 struct hso_serial *serial = NULL;
72dc1c09
GKH		 579 unsigned long flags;
580
72dc1c09 581 spin_lock_irqsave(&serial_table_lock, flags);
0235f641
GKH		 582 if (serial_table[index])
583 serial = dev2ser(serial_table[index]);
72dc1c09
GKH		 584 spin_unlock_irqrestore(&serial_table_lock, flags);
585
586 return serial;
587}
588
589static int get_free_serial_index(void)
590{
591 int index;
592 unsigned long flags;
593
594 spin_lock_irqsave(&serial_table_lock, flags);
595 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
596 if (serial_table[index] == NULL) {
597 spin_unlock_irqrestore(&serial_table_lock, flags);
598 return index;
599 }
600 }
601 spin_unlock_irqrestore(&serial_table_lock, flags);
602
603 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
604 return -1;
605}
606
607static void set_serial_by_index(unsigned index, struct hso_serial *serial)
608{
609 unsigned long flags;
0235f641 610
72dc1c09
GKH		 611 spin_lock_irqsave(&serial_table_lock, flags);
612 if (serial)
613 serial_table[index] = serial->parent;
614 else
615 serial_table[index] = NULL;
616 spin_unlock_irqrestore(&serial_table_lock, flags);
617}
618
52429eb2
DJB		 619
620static struct hso_mutex_t *hso_get_free_mutex(void)
621{
622 int index;
623 struct hso_mutex_t *curr_hso_mutex;
624
625 spin_lock(&hso_mutex_lock);
626 for (index = 0; index < HSO_NUM_MUTEXES; index++) {
627 curr_hso_mutex = &hso_mutex_table[index];
628 if (!curr_hso_mutex->allocated) {
629 curr_hso_mutex->allocated = 1;
630 spin_unlock(&hso_mutex_lock);
631 return curr_hso_mutex;
632 }
633 }
634 printk(KERN_ERR "BUG %s: no free hso_mutexs devices in table\n"
635 , __func__);
636 spin_unlock(&hso_mutex_lock);
637 return NULL;
638}
639
640static void hso_free_mutex(struct hso_mutex_t *mutex)
641{
642 spin_lock(&hso_mutex_lock);
643 mutex->allocated = 0;
644 spin_unlock(&hso_mutex_lock);
645}
646
0235f641 647/* log a meaningful explanation of an USB status */
72dc1c09
GKH		 648static void log_usb_status(int status, const char *function)
649{
650 char *explanation;
651
652 switch (status) {
653 case -ENODEV:
654 explanation = "no device";
655 break;
656 case -ENOENT:
657 explanation = "endpoint not enabled";
658 break;
659 case -EPIPE:
660 explanation = "endpoint stalled";
661 break;
662 case -ENOSPC:
663 explanation = "not enough bandwidth";
664 break;
665 case -ESHUTDOWN:
666 explanation = "device disabled";
667 break;
668 case -EHOSTUNREACH:
669 explanation = "device suspended";
670 break;
671 case -EINVAL:
672 case -EAGAIN:
673 case -EFBIG:
674 case -EMSGSIZE:
675 explanation = "internal error";
676 break;
677 default:
678 explanation = "unknown status";
679 break;
680 }
681 D1("%s: received USB status - %s (%d)", function, explanation, status);
682}
683
684/* Network interface functions */
685
686/* called when net interface is brought up by ifconfig */
687static int hso_net_open(struct net_device *net)
688{
689 struct hso_net *odev = netdev_priv(net);
690 unsigned long flags = 0;
691
692 if (!odev) {
693 dev_err(&net->dev, "No net device !\n");
694 return -ENODEV;
695 }
696
697 odev->skb_tx_buf = NULL;
698
699 /* setup environment */
700 spin_lock_irqsave(&odev->net_lock, flags);
701 odev->rx_parse_state = WAIT_IP;
702 odev->rx_buf_size = 0;
703 odev->rx_buf_missing = sizeof(struct iphdr);
704 spin_unlock_irqrestore(&odev->net_lock, flags);
705
706 hso_start_net_device(odev->parent);
707
708 /* We are up and running. */
709 set_bit(HSO_NET_RUNNING, &odev->flags);
710
711 /* Tell the kernel we are ready to start receiving from it */
712 netif_start_queue(net);
713
714 return 0;
715}
716
717/* called when interface is brought down by ifconfig */
718static int hso_net_close(struct net_device *net)
719{
720 struct hso_net *odev = netdev_priv(net);
721
722 /* we don't need the queue anymore */
723 netif_stop_queue(net);
724 /* no longer running */
725 clear_bit(HSO_NET_RUNNING, &odev->flags);
726
727 hso_stop_net_device(odev->parent);
728
729 /* done */
730 return 0;
731}
732
733/* USB tells is xmit done, we should start the netqueue again */
734static void write_bulk_callback(struct urb *urb)
735{
736 struct hso_net *odev = urb->context;
737 int status = urb->status;
738
739 /* Sanity check */
740 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
741 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
742 return;
743 }
744
745 /* Do we still have a valid kernel network device? */
746 if (!netif_device_present(odev->net)) {
747 dev_err(&urb->dev->dev, "%s: net device not present\n",
748 __func__);
749 return;
750 }
751
752 /* log status, but don't act on it, we don't need to resubmit anything
753 * anyhow */
754 if (status)
755 log_usb_status(status, __func__);
756
757 hso_put_activity(odev->parent);
758
759 /* Tell the network interface we are ready for another frame */
760 netif_wake_queue(odev->net);
761}
762
763/* called by kernel when we need to transmit a packet */
764static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net)
765{
766 struct hso_net *odev = netdev_priv(net);
767 int result;
768
769 /* Tell the kernel, "No more frames 'til we are done with this one." */
770 netif_stop_queue(net);
771 if (hso_get_activity(odev->parent) == -EAGAIN) {
772 odev->skb_tx_buf = skb;
773 return 0;
774 }
775
776 /* log if asked */
777 DUMP1(skb->data, skb->len);
778 /* Copy it from kernel memory to OUR memory */
779 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
780 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
781
782 /* Fill in the URB for shipping it out. */
783 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
784 odev->parent->usb,
785 usb_sndbulkpipe(odev->parent->usb,
786 odev->out_endp->
787 bEndpointAddress & 0x7F),
788 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
789 odev);
790
791 /* Deal with the Zero Length packet problem, I hope */
792 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
793
794 /* Send the URB on its merry way. */
795 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
796 if (result) {
797 dev_warn(&odev->parent->interface->dev,
798 "failed mux_bulk_tx_urb %d", result);
799 net->stats.tx_errors++;
800 netif_start_queue(net);
801 } else {
802 net->stats.tx_packets++;
803 net->stats.tx_bytes += skb->len;
804 /* And tell the kernel when the last transmit started. */
805 net->trans_start = jiffies;
806 }
807 dev_kfree_skb(skb);
808 /* we're done */
809 return result;
810}
811
812static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
813{
814 struct hso_net *odev = netdev_priv(net);
815
816 strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
817 strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
818 usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
819}
820
821static struct ethtool_ops ops = {
822 .get_drvinfo = hso_get_drvinfo,
823 .get_link = ethtool_op_get_link
824};
825
826/* called when a packet did not ack after watchdogtimeout */
827static void hso_net_tx_timeout(struct net_device *net)
828{
829 struct hso_net *odev = netdev_priv(net);
830
831 if (!odev)
832 return;
833
834 /* Tell syslog we are hosed. */
835 dev_warn(&net->dev, "Tx timed out.\n");
836
837 /* Tear the waiting frame off the list */
838 if (odev->mux_bulk_tx_urb
839 && (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
840 usb_unlink_urb(odev->mux_bulk_tx_urb);
841
842 /* Update statistics */
843 net->stats.tx_errors++;
844}
845
846/* make a real packet from the received USB buffer */
847static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
848 unsigned int count, unsigned char is_eop)
849{
850 unsigned short temp_bytes;
851 unsigned short buffer_offset = 0;
852 unsigned short frame_len;
853 unsigned char *tmp_rx_buf;
854
855 /* log if needed */
856 D1("Rx %d bytes", count);
857 DUMP(ip_pkt, min(128, (int)count));
858
859 while (count) {
860 switch (odev->rx_parse_state) {
861 case WAIT_IP:
862 /* waiting for IP header. */
863 /* wanted bytes - size of ip header */
864 temp_bytes =
865 (count <
866 odev->rx_buf_missing) ? count : odev->
867 rx_buf_missing;
868
869 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
870 odev->rx_buf_size, ip_pkt + buffer_offset,
871 temp_bytes);
872
873 odev->rx_buf_size += temp_bytes;
874 buffer_offset += temp_bytes;
875 odev->rx_buf_missing -= temp_bytes;
876 count -= temp_bytes;
877
878 if (!odev->rx_buf_missing) {
879 /* header is complete allocate an sk_buffer and
880 * continue to WAIT_DATA */
881 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
882
883 if ((frame_len > DEFAULT_MRU) ||
884 (frame_len < sizeof(struct iphdr))) {
885 dev_err(&odev->net->dev,
886 "Invalid frame (%d) length\n",
887 frame_len);
888 odev->rx_parse_state = WAIT_SYNC;
889 continue;
890 }
891 /* Allocate an sk_buff */
892 odev->skb_rx_buf = dev_alloc_skb(frame_len);
893 if (!odev->skb_rx_buf) {
894 /* We got no receive buffer. */
895 D1("could not allocate memory");
896 odev->rx_parse_state = WAIT_SYNC;
897 return;
898 }
899 /* Here's where it came from */
900 odev->skb_rx_buf->dev = odev->net;
901
902 /* Copy what we got so far. make room for iphdr
903 * after tail. */
904 tmp_rx_buf =
905 skb_put(odev->skb_rx_buf,
906 sizeof(struct iphdr));
907 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
908 sizeof(struct iphdr));
909
910 /* ETH_HLEN */
911 odev->rx_buf_size = sizeof(struct iphdr);
912
913 /* Filip actually use .tot_len */
914 odev->rx_buf_missing =
915 frame_len - sizeof(struct iphdr);
916 odev->rx_parse_state = WAIT_DATA;
917 }
918 break;
919
920 case WAIT_DATA:
921 temp_bytes = (count < odev->rx_buf_missing)
922 ? count : odev->rx_buf_missing;
923
924 /* Copy the rest of the bytes that are left in the
925 * buffer into the waiting sk_buf. */
926 /* Make room for temp_bytes after tail. */
927 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
928 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
929
930 odev->rx_buf_missing -= temp_bytes;
931 count -= temp_bytes;
932 buffer_offset += temp_bytes;
933 odev->rx_buf_size += temp_bytes;
934 if (!odev->rx_buf_missing) {
935 /* Packet is complete. Inject into stack. */
936 /* We have IP packet here */
937 odev->skb_rx_buf->protocol =
938 __constant_htons(ETH_P_IP);
939 /* don't check it */
940 odev->skb_rx_buf->ip_summed =
941 CHECKSUM_UNNECESSARY;
942
943 skb_reset_mac_header(odev->skb_rx_buf);
944
945 /* Ship it off to the kernel */
946 netif_rx(odev->skb_rx_buf);
947 /* No longer our buffer. */
948 odev->skb_rx_buf = NULL;
949
950 /* update out statistics */
951 odev->net->stats.rx_packets++;
952
953 odev->net->stats.rx_bytes += odev->rx_buf_size;
954
955 odev->rx_buf_size = 0;
956 odev->rx_buf_missing = sizeof(struct iphdr);
957 odev->rx_parse_state = WAIT_IP;
958 }
959 break;
960
961 case WAIT_SYNC:
962 D1(" W_S");
963 count = 0;
964 break;
965 default:
966 D1(" ");
967 count--;
968 break;
969 }
970 }
971
972 /* Recovery mechanism for WAIT_SYNC state. */
973 if (is_eop) {
974 if (odev->rx_parse_state == WAIT_SYNC) {
975 odev->rx_parse_state = WAIT_IP;
976 odev->rx_buf_size = 0;
977 odev->rx_buf_missing = sizeof(struct iphdr);
978 }
979 }
980}
981
982/* Moving data from usb to kernel (in interrupt state) */
983static void read_bulk_callback(struct urb *urb)
984{
985 struct hso_net *odev = urb->context;
986 struct net_device *net;
987 int result;
988 int status = urb->status;
989
990 /* is al ok? (Filip: Who's Al ?) */
991 if (status) {
992 log_usb_status(status, __func__);
993 return;
994 }
995
996 /* Sanity check */
997 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
998 D1("BULK IN callback but driver is not active!");
999 return;
1000 }
1001 usb_mark_last_busy(urb->dev);
1002
1003 net = odev->net;
1004
1005 if (!netif_device_present(net)) {
1006 /* Somebody killed our network interface... */
1007 return;
1008 }
1009
1010 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1011 u32 rest;
1012 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1013 rest = urb->actual_length % odev->in_endp->wMaxPacketSize;
1014 if (((rest == 5) || (rest == 6))
1015 && !memcmp(((u8 *) urb->transfer_buffer) +
1016 urb->actual_length - 4, crc_check, 4)) {
1017 urb->actual_length -= 4;
1018 }
1019 }
1020
1021 /* do we even have a packet? */
1022 if (urb->actual_length) {
1023 /* Handle the IP stream, add header and push it onto network
1024 * stack if the packet is complete. */
1025 spin_lock(&odev->net_lock);
1026 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1027 (urb->transfer_buffer_length >
1028 urb->actual_length) ? 1 : 0);
1029 spin_unlock(&odev->net_lock);
1030 }
1031
1032 /* We are done with this URB, resubmit it. Prep the USB to wait for
1033 * another frame. Reuse same as received. */
1034 usb_fill_bulk_urb(urb,
1035 odev->parent->usb,
1036 usb_rcvbulkpipe(odev->parent->usb,
1037 odev->in_endp->
1038 bEndpointAddress & 0x7F),
1039 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1040 read_bulk_callback, odev);
1041
1042 /* Give this to the USB subsystem so it can tell us when more data
1043 * arrives. */
1044 result = usb_submit_urb(urb, GFP_ATOMIC);
1045 if (result)
1046 dev_warn(&odev->parent->interface->dev,
1047 "%s failed submit mux_bulk_rx_urb %d", __func__,
1048 result);
1049}
1050
1051/* Serial driver functions */
1052
1053static void _hso_serial_set_termios(struct tty_struct *tty,
1054 struct ktermios *old)
1055{
1056 struct hso_serial *serial = get_serial_by_tty(tty);
1057 struct ktermios *termios;
1058
1059 if ((!tty) || (!tty->termios) || (!serial)) {
1060 printk(KERN_ERR "%s: no tty structures", __func__);
1061 return;
1062 }
1063
1064 D4("port %d", serial->minor);
1065
1066 /*
1067 * The default requirements for this device are:
1068 */
1069 termios = tty->termios;
1070 termios->c_iflag &=
1071 ~(IGNBRK /* disable ignore break */
1072 | BRKINT /* disable break causes interrupt */
1073 | PARMRK /* disable mark parity errors */
1074 | ISTRIP /* disable clear high bit of input characters */
1075 | INLCR /* disable translate NL to CR */
1076 | IGNCR /* disable ignore CR */
1077 | ICRNL /* disable translate CR to NL */
1078 | IXON); /* disable enable XON/XOFF flow control */
1079
1080 /* disable postprocess output characters */
1081 termios->c_oflag &= ~OPOST;
1082
1083 termios->c_lflag &=
1084 ~(ECHO /* disable echo input characters */
1085 | ECHONL /* disable echo new line */
1086 | ICANON /* disable erase, kill, werase, and rprnt
1087 special characters */
1088 | ISIG /* disable interrupt, quit, and suspend special
1089 characters */
1090 | IEXTEN); /* disable non-POSIX special characters */
1091
1092 termios->c_cflag &=
1093 ~(CSIZE /* no size */
1094 | PARENB /* disable parity bit */
1095 | CBAUD /* clear current baud rate */
1096 | CBAUDEX); /* clear current buad rate */
1097
1098 termios->c_cflag |= CS8; /* character size 8 bits */
1099
1100 /* baud rate 115200 */
1101 tty_encode_baud_rate(serial->tty, 115200, 115200);
1102
1103 /*
1104 * Force low_latency on; otherwise the pushes are scheduled;
1105 * this is bad as it opens up the possibility of dropping bytes
1106 * on the floor. We don't want to drop bytes on the floor. :)
1107 */
1108 serial->tty->low_latency = 1;
1109 return;
1110}
1111
8ef5ba63
DJB		 1112static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1113{
1114 int result;
1115#ifdef CONFIG_HSO_AUTOPM
1116 usb_mark_last_busy(urb->dev);
1117#endif
1118 /* We are done with this URB, resubmit it. Prep the USB to wait for
1119 * another frame */
1120 usb_fill_bulk_urb(urb, serial->parent->usb,
1121 usb_rcvbulkpipe(serial->parent->usb,
1122 serial->in_endp->
1123 bEndpointAddress & 0x7F),
1124 urb->transfer_buffer, serial->rx_data_length,
1125 hso_std_serial_read_bulk_callback, serial);
1126 /* Give this to the USB subsystem so it can tell us when more data
1127 * arrives. */
1128 result = usb_submit_urb(urb, GFP_ATOMIC);
1129 if (result) {
1130 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1131 __func__, result);
1132 }
1133}
1134
1135
1136
1137
1138static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1139{
1140 int count;
1141 struct urb *curr_urb;
1142
1143 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1144 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1145 count = put_rxbuf_data(curr_urb, serial);
1146 if (count == -1)
1147 return;
1148 if (count == 0) {
1149 serial->curr_rx_urb_idx++;
1150 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1151 serial->curr_rx_urb_idx = 0;
1152 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1153 }
1154 }
1155}
1156
1157static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1158{
1159 int count = 0;
1160 struct urb *urb;
1161
1162 urb = serial->rx_urb[0];
1163 if (serial->open_count > 0) {
1164 count = put_rxbuf_data(urb, serial);
1165 if (count == -1)
1166 return;
1167 }
1168 /* Re issue a read as long as we receive data. */
1169
1170 if (count == 0 && ((urb->actual_length != 0) ||
1171 (serial->rx_state == RX_PENDING))) {
1172 serial->rx_state = RX_SENT;
1173 hso_mux_serial_read(serial);
1174 } else
1175 serial->rx_state = RX_IDLE;
1176}
1177
1178
1179/* read callback for Diag and CS port */
1180static void hso_std_serial_read_bulk_callback(struct urb *urb)
1181{
1182 struct hso_serial *serial = urb->context;
1183 int status = urb->status;
1184
1185 /* sanity check */
1186 if (!serial) {
1187 D1("serial == NULL");
1188 return;
1189 } else if (status) {
1190 log_usb_status(status, __func__);
1191 return;
1192 }
1193
1194 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1195 D1("Actual length = %d\n", urb->actual_length);
1196 DUMP1(urb->transfer_buffer, urb->actual_length);
1197
1198 /* Anyone listening? */
1199 if (serial->open_count == 0)
1200 return;
1201
1202 if (status == 0) {
1203 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1204 u32 rest;
1205 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1206 rest =
1207 urb->actual_length %
1208 serial->in_endp->wMaxPacketSize;
1209 if (((rest == 5) || (rest == 6))
1210 && !memcmp(((u8 *) urb->transfer_buffer) +
1211 urb->actual_length - 4, crc_check, 4)) {
1212 urb->actual_length -= 4;
1213 }
1214 }
1215 /* Valid data, handle RX data */
1216 spin_lock(&serial->serial_lock);
1217 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1218 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1219 spin_unlock(&serial->serial_lock);
1220 } else if (status == -ENOENT || status == -ECONNRESET) {
1221 /* Unlinked - check for throttled port. */
1222 D2("Port %d, successfully unlinked urb", serial->minor);
1223 spin_lock(&serial->serial_lock);
1224 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1225 hso_resubmit_rx_bulk_urb(serial, urb);
1226 spin_unlock(&serial->serial_lock);
1227 } else {
1228 D2("Port %d, status = %d for read urb", serial->minor, status);
1229 return;
1230 }
1231}
1232
1233/*
1234 * This needs to be a tasklet otherwise we will
1235 * end up recursively calling this function.
1236 */
1237void hso_unthrottle_tasklet(struct hso_serial *serial)
1238{
1239 unsigned long flags;
1240
1241 spin_lock_irqsave(&serial->serial_lock, flags);
1242 if ((serial->parent->port_spec & HSO_INTF_MUX))
1243 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1244 else
1245 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1246 spin_unlock_irqrestore(&serial->serial_lock, flags);
1247}
1248
1249static void hso_unthrottle(struct tty_struct *tty)
1250{
1251 struct hso_serial *serial = get_serial_by_tty(tty);
1252
1253 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1254}
1255
1256void hso_unthrottle_workfunc(struct work_struct *work)
1257{
1258 struct hso_serial *serial =
1259 container_of(work, struct hso_serial,
1260 retry_unthrottle_workqueue);
1261 hso_unthrottle_tasklet(serial);
1262}
1263
72dc1c09
GKH		 1264/* open the requested serial port */
1265static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1266{
1267 struct hso_serial *serial = get_serial_by_index(tty->index);
52429eb2
DJB		 1268 int result1 = 0, result2 = 0;
1269 struct mutex *hso_mutex = NULL;
1270 int refcnt = 1;
72dc1c09
GKH		 1271
1272 /* sanity check */
1273 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1274 tty->driver_data = NULL;
1275 D1("Failed to open port");
1276 return -ENODEV;
1277 }
1278
52429eb2
DJB		 1279 hso_mutex = &serial->parent->mutex->mutex;
1280 mutex_lock(hso_mutex);
4a3e8181
DJB		 1281 /* check for port already opened, if not set the termios */
1282 /* The serial->open count needs to be here as hso_serial_close
1283 * will be called even if hso_serial_open returns -ENODEV.
1284 */
1285 serial->open_count++;
52429eb2
DJB		 1286 result1 = usb_autopm_get_interface(serial->parent->interface);
1287 if (result1 < 0)
72dc1c09
GKH		 1288 goto err_out;
1289
1290 D1("Opening %d", serial->minor);
1291 kref_get(&serial->parent->ref);
1292
1293 /* setup */
1294 tty->driver_data = serial;
1295 serial->tty = tty;
1296
72dc1c09
GKH		 1297 if (serial->open_count == 1) {
1298 tty->low_latency = 1;
8ef5ba63 1299 serial->rx_state = RX_IDLE;
72dc1c09
GKH		 1300 /* Force default termio settings */
1301 _hso_serial_set_termios(tty, NULL);
8ef5ba63
DJB		 1302 tasklet_init(&serial->unthrottle_tasklet,
1303 (void (*)(unsigned long))hso_unthrottle_tasklet,
1304 (unsigned long)serial);
1305 INIT_WORK(&serial->retry_unthrottle_workqueue,
1306 hso_unthrottle_workfunc);
52429eb2
DJB		 1307 result2 = hso_start_serial_device(serial->parent, GFP_KERNEL);
1308 if (result2) {
72dc1c09
GKH		 1309 hso_stop_serial_device(serial->parent);
1310 serial->open_count--;
72dc1c09
GKH		 1311 }
1312 } else {
1313 D1("Port was already open");
1314 }
1315
1316 usb_autopm_put_interface(serial->parent->interface);
1317
1318 /* done */
52429eb2 1319 if (result1)
72dc1c09
GKH		 1320 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1321err_out:
52429eb2
DJB		 1322 if (result2)
1323 refcnt = kref_put(&serial->parent->ref, hso_serial_ref_free);
1324 mutex_unlock(hso_mutex);
1325 if (refcnt == 0)
1326 hso_free_mutex(container_of(hso_mutex,
1327 struct hso_mutex_t, mutex));
1328 return result1 == 0 ? result2 : result1;
72dc1c09
GKH		 1329}
1330
1331/* close the requested serial port */
1332static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1333{
1334 struct hso_serial *serial = tty->driver_data;
1335 u8 usb_gone;
52429eb2
DJB		 1336 struct mutex *hso_mutex;
1337 int refcnt;
72dc1c09
GKH		 1338
1339 D1("Closing serial port");
4a3e8181
DJB		 1340 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1341 D1("invalid serial structure bailing out.\n");
1342 return;
1343 }
72dc1c09 1344
72dc1c09 1345 usb_gone = serial->parent->usb_gone;
52429eb2
DJB		 1346 hso_mutex = &serial->parent->mutex->mutex;
1347 mutex_lock(hso_mutex);
72dc1c09
GKH		 1348
1349 if (!usb_gone)
1350 usb_autopm_get_interface(serial->parent->interface);
1351
1352 /* reset the rts and dtr */
1353 /* do the actual close */
1354 serial->open_count--;
1355 if (serial->open_count <= 0) {
72dc1c09
GKH		 1356 serial->open_count = 0;
1357 if (serial->tty) {
1358 serial->tty->driver_data = NULL;
1359 serial->tty = NULL;
1360 }
1361 if (!usb_gone)
1362 hso_stop_serial_device(serial->parent);
8ef5ba63
DJB		 1363 tasklet_kill(&serial->unthrottle_tasklet);
1364 cancel_work_sync(&serial->retry_unthrottle_workqueue);
72dc1c09 1365 }
8ef5ba63 1366
72dc1c09
GKH		 1367 if (!usb_gone)
1368 usb_autopm_put_interface(serial->parent->interface);
52429eb2
DJB		 1369 refcnt = kref_put(&serial->parent->ref, hso_serial_ref_free);
1370 mutex_unlock(hso_mutex);
1371 if (refcnt == 0)
1372 hso_free_mutex(container_of(hso_mutex,
1373 struct hso_mutex_t, mutex));
72dc1c09
GKH		 1374}
1375
1376/* close the requested serial port */
1377static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1378 int count)
1379{
1380 struct hso_serial *serial = get_serial_by_tty(tty);
1381 int space, tx_bytes;
1382 unsigned long flags;
1383
1384 /* sanity check */
1385 if (serial == NULL) {
1386 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1387 return -ENODEV;
1388 }
1389
1390 spin_lock_irqsave(&serial->serial_lock, flags);
1391
1392 space = serial->tx_data_length - serial->tx_buffer_count;
1393 tx_bytes = (count < space) ? count : space;
1394
1395 if (!tx_bytes)
1396 goto out;
1397
1398 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1399 serial->tx_buffer_count += tx_bytes;
1400
1401out:
1402 spin_unlock_irqrestore(&serial->serial_lock, flags);
1403
1404 hso_kick_transmit(serial);
1405 /* done */
1406 return tx_bytes;
1407}
1408
1409/* how much room is there for writing */
1410static int hso_serial_write_room(struct tty_struct *tty)
1411{
1412 struct hso_serial *serial = get_serial_by_tty(tty);
1413 int room;
1414 unsigned long flags;
1415
1416 spin_lock_irqsave(&serial->serial_lock, flags);
1417 room = serial->tx_data_length - serial->tx_buffer_count;
1418 spin_unlock_irqrestore(&serial->serial_lock, flags);
1419
1420 /* return free room */
1421 return room;
1422}
1423
1424/* setup the term */
1425static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1426{
1427 struct hso_serial *serial = get_serial_by_tty(tty);
1428 unsigned long flags;
1429
1430 if (old)
1431 D5("Termios called with: cflags new[%d] - old[%d]",
1432 tty->termios->c_cflag, old->c_cflag);
1433
1434 /* the actual setup */
1435 spin_lock_irqsave(&serial->serial_lock, flags);
1436 if (serial->open_count)
1437 _hso_serial_set_termios(tty, old);
1438 else
1439 tty->termios = old;
1440 spin_unlock_irqrestore(&serial->serial_lock, flags);
1441
1442 /* done */
1443 return;
1444}
1445
1446/* how many characters in the buffer */
1447static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1448{
1449 struct hso_serial *serial = get_serial_by_tty(tty);
1450 int chars;
1451 unsigned long flags;
1452
1453 /* sanity check */
1454 if (serial == NULL)
1455 return 0;
1456
1457 spin_lock_irqsave(&serial->serial_lock, flags);
1458 chars = serial->tx_buffer_count;
1459 spin_unlock_irqrestore(&serial->serial_lock, flags);
1460
1461 return chars;
1462}
1463
1464static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1465{
cd90ee17 1466 unsigned int value;
72dc1c09 1467 struct hso_serial *serial = get_serial_by_tty(tty);
cd90ee17 1468 unsigned long flags;
72dc1c09
GKH		 1469
1470 /* sanity check */
1471 if (!serial) {
1472 D1("no tty structures");
1473 return -EINVAL;
1474 }
cd90ee17
DM		 1475
1476 spin_lock_irqsave(&serial->serial_lock, flags);
1477 value = ((serial->rts_state) ? TIOCM_RTS : 0) |
72dc1c09 1478 ((serial->dtr_state) ? TIOCM_DTR : 0);
cd90ee17 1479 spin_unlock_irqrestore(&serial->serial_lock, flags);
72dc1c09 1480
cd90ee17 1481 return value;
72dc1c09
GKH		 1482}
1483
1484static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1485 unsigned int set, unsigned int clear)
1486{
1487 int val = 0;
1488 unsigned long flags;
1489 int if_num;
1490 struct hso_serial *serial = get_serial_by_tty(tty);
1491
1492 /* sanity check */
1493 if (!serial) {
1494 D1("no tty structures");
1495 return -EINVAL;
1496 }
1497 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1498
1499 spin_lock_irqsave(&serial->serial_lock, flags);
1500 if (set & TIOCM_RTS)
1501 serial->rts_state = 1;
1502 if (set & TIOCM_DTR)
1503 serial->dtr_state = 1;
1504
1505 if (clear & TIOCM_RTS)
1506 serial->rts_state = 0;
1507 if (clear & TIOCM_DTR)
1508 serial->dtr_state = 0;
1509
1510 if (serial->dtr_state)
1511 val |= 0x01;
1512 if (serial->rts_state)
1513 val |= 0x02;
1514
1515 spin_unlock_irqrestore(&serial->serial_lock, flags);
1516
1517 return usb_control_msg(serial->parent->usb,
1518 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1519 0x21, val, if_num, NULL, 0,
1520 USB_CTRL_SET_TIMEOUT);
1521}
1522
1523/* starts a transmit */
1524static void hso_kick_transmit(struct hso_serial *serial)
1525{
1526 u8 *temp;
1527 unsigned long flags;
1528 int res;
1529
1530 spin_lock_irqsave(&serial->serial_lock, flags);
1531 if (!serial->tx_buffer_count)
1532 goto out;
1533
1534 if (serial->tx_urb_used)
1535 goto out;
1536
1537 /* Wakeup USB interface if necessary */
1538 if (hso_get_activity(serial->parent) == -EAGAIN)
1539 goto out;
1540
1541 /* Switch pointers around to avoid memcpy */
1542 temp = serial->tx_buffer;
1543 serial->tx_buffer = serial->tx_data;
1544 serial->tx_data = temp;
1545 serial->tx_data_count = serial->tx_buffer_count;
1546 serial->tx_buffer_count = 0;
1547
1548 /* If temp is set, it means we switched buffers */
1549 if (temp && serial->write_data) {
1550 res = serial->write_data(serial);
1551 if (res >= 0)
1552 serial->tx_urb_used = 1;
1553 }
1554out:
1555 spin_unlock_irqrestore(&serial->serial_lock, flags);
1556}
1557
1558/* make a request (for reading and writing data to muxed serial port) */
1559static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1560 struct urb *ctrl_urb,
1561 struct usb_ctrlrequest *ctrl_req,
1562 u8 *ctrl_urb_data, u32 size)
1563{
1564 int result;
1565 int pipe;
1566
1567 /* Sanity check */
1568 if (!serial || !ctrl_urb || !ctrl_req) {
1569 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1570 return -EINVAL;
1571 }
1572
1573 /* initialize */
1574 ctrl_req->wValue = 0;
1575 ctrl_req->wIndex = hso_port_to_mux(port);
1576 ctrl_req->wLength = size;
1577
1578 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1579 /* Reading command */
1580 ctrl_req->bRequestType = USB_DIR_IN |
1581 USB_TYPE_OPTION_VENDOR |
1582 USB_RECIP_INTERFACE;
1583 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1584 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1585 } else {
1586 /* Writing command */
1587 ctrl_req->bRequestType = USB_DIR_OUT |
1588 USB_TYPE_OPTION_VENDOR |
1589 USB_RECIP_INTERFACE;
1590 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1591 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1592 }
1593 /* syslog */
1594 D2("%s command (%02x) len: %d, port: %d",
1595 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1596 ctrl_req->bRequestType, ctrl_req->wLength, port);
1597
1598 /* Load ctrl urb */
1599 ctrl_urb->transfer_flags = 0;
1600 usb_fill_control_urb(ctrl_urb,
1601 serial->parent->usb,
1602 pipe,
1603 (u8 *) ctrl_req,
1604 ctrl_urb_data, size, ctrl_callback, serial);
1605 /* Send it on merry way */
1606 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1607 if (result) {
1608 dev_err(&ctrl_urb->dev->dev,
1609 "%s failed submit ctrl_urb %d type %d", __func__,
1610 result, type);
1611 return result;
1612 }
1613
1614 /* done */
1615 return size;
1616}
1617
1618/* called by intr_callback when read occurs */
1619static int hso_mux_serial_read(struct hso_serial *serial)
1620{
1621 if (!serial)
1622 return -EINVAL;
1623
1624 /* clean data */
1625 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1626 /* make the request */
1627
1628 if (serial->num_rx_urbs != 1) {
1629 dev_err(&serial->parent->interface->dev,
1630 "ERROR: mux'd reads with multiple buffers "
1631 "not possible\n");
1632 return 0;
1633 }
1634 return mux_device_request(serial,
1635 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1636 serial->parent->port_spec & HSO_PORT_MASK,
1637 serial->rx_urb[0],
1638 &serial->ctrl_req_rx,
1639 serial->rx_data[0], serial->rx_data_length);
1640}
1641
1642/* used for muxed serial port callback (muxed serial read) */
1643static void intr_callback(struct urb *urb)
1644{
1645 struct hso_shared_int *shared_int = urb->context;
1646 struct hso_serial *serial;
1647 unsigned char *port_req;
1648 int status = urb->status;
1649 int i;
1650
1651 usb_mark_last_busy(urb->dev);
1652
1653 /* sanity check */
1654 if (!shared_int)
1655 return;
1656
1657 /* status check */
1658 if (status) {
1659 log_usb_status(status, __func__);
1660 return;
1661 }
1662 D4("\n--- Got intr callback 0x%02X ---", status);
1663
1664 /* what request? */
1665 port_req = urb->transfer_buffer;
1666 D4(" port_req = 0x%.2X\n", *port_req);
1667 /* loop over all muxed ports to find the one sending this */
1668 for (i = 0; i < 8; i++) {
1669 /* max 8 channels on MUX */
1670 if (*port_req & (1 << i)) {
1671 serial = get_serial_by_shared_int_and_type(shared_int,
1672 (1 << i));
1673 if (serial != NULL) {
1674 D1("Pending read interrupt on port %d\n", i);
8ef5ba63
DJB		 1675 spin_lock(&serial->serial_lock);
1676 if (serial->rx_state == RX_IDLE) {
72dc1c09
GKH		 1677 /* Setup and send a ctrl req read on
1678 * port i */
8ef5ba63
DJB		 1679 if (!serial->rx_urb_filled[0]) {
1680 serial->rx_state = RX_SENT;
1681 hso_mux_serial_read(serial);
1682 } else
1683 serial->rx_state = RX_PENDING;
1684
72dc1c09
GKH		 1685 } else {
1686 D1("Already pending a read on "
1687 "port %d\n", i);
1688 }
8ef5ba63 1689 spin_unlock(&serial->serial_lock);
72dc1c09
GKH		 1690 }
1691 }
1692 }
1693 /* Resubmit interrupt urb */
1694 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1695}
1696
1697/* called for writing to muxed serial port */
1698static int hso_mux_serial_write_data(struct hso_serial *serial)
1699{
1700 if (NULL == serial)
1701 return -EINVAL;
1702
1703 return mux_device_request(serial,
1704 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1705 serial->parent->port_spec & HSO_PORT_MASK,
1706 serial->tx_urb,
1707 &serial->ctrl_req_tx,
1708 serial->tx_data, serial->tx_data_count);
1709}
1710
1711/* write callback for Diag and CS port */
1712static void hso_std_serial_write_bulk_callback(struct urb *urb)
1713{
1714 struct hso_serial *serial = urb->context;
1715 int status = urb->status;
1716
1717 /* sanity check */
1718 if (!serial) {
1719 D1("serial == NULL");
1720 return;
1721 }
1722
1723 spin_lock(&serial->serial_lock);
1724 serial->tx_urb_used = 0;
1725 spin_unlock(&serial->serial_lock);
1726 if (status) {
1727 log_usb_status(status, __func__);
1728 return;
1729 }
1730 hso_put_activity(serial->parent);
add477df
OB		 1731 if (serial->tty)
1732 tty_wakeup(serial->tty);
72dc1c09
GKH		 1733 hso_kick_transmit(serial);
1734
1735 D1(" ");
1736 return;
1737}
1738
1739/* called for writing diag or CS serial port */
1740static int hso_std_serial_write_data(struct hso_serial *serial)
1741{
1742 int count = serial->tx_data_count;
1743 int result;
1744
1745 usb_fill_bulk_urb(serial->tx_urb,
1746 serial->parent->usb,
1747 usb_sndbulkpipe(serial->parent->usb,
1748 serial->out_endp->
1749 bEndpointAddress & 0x7F),
1750 serial->tx_data, serial->tx_data_count,
1751 hso_std_serial_write_bulk_callback, serial);
1752
1753 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1754 if (result) {
1755 dev_warn(&serial->parent->usb->dev,
1756 "Failed to submit urb - res %d\n", result);
1757 return result;
1758 }
1759
1760 return count;
1761}
1762
1763/* callback after read or write on muxed serial port */
1764static void ctrl_callback(struct urb *urb)
1765{
1766 struct hso_serial *serial = urb->context;
1767 struct usb_ctrlrequest *req;
1768 int status = urb->status;
1769
1770 /* sanity check */
1771 if (!serial)
1772 return;
1773
1774 spin_lock(&serial->serial_lock);
1775 serial->tx_urb_used = 0;
1776 spin_unlock(&serial->serial_lock);
1777 if (status) {
1778 log_usb_status(status, __func__);
1779 return;
1780 }
1781
1782 /* what request? */
1783 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1784 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
1785 D4("Actual length of urb = %d\n", urb->actual_length);
1786 DUMP1(urb->transfer_buffer, urb->actual_length);
1787
1788 if (req->bRequestType ==
1789 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
1790 /* response to a read command */
8ef5ba63
DJB		 1791 serial->rx_urb_filled[0] = 1;
1792 spin_lock(&serial->serial_lock);
1793 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1794 spin_unlock(&serial->serial_lock);
72dc1c09
GKH		 1795 } else {
1796 hso_put_activity(serial->parent);
add477df
OB		 1797 if (serial->tty)
1798 tty_wakeup(serial->tty);
72dc1c09
GKH		 1799 /* response to a write command */
1800 hso_kick_transmit(serial);
1801 }
1802}
1803
1804/* handle RX data for serial port */
8ef5ba63 1805static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
72dc1c09
GKH		 1806{
1807 struct tty_struct *tty = serial->tty;
8ef5ba63
DJB		 1808 int write_length_remaining = 0;
1809 int curr_write_len;
72dc1c09
GKH		 1810 /* Sanity check */
1811 if (urb == NULL || serial == NULL) {
1812 D1("serial = NULL");
8ef5ba63 1813 return -2;
72dc1c09
GKH		 1814 }
1815
1816 /* Push data to tty */
8ef5ba63
DJB		 1817 if (tty) {
1818 write_length_remaining = urb->actual_length -
1819 serial->curr_rx_urb_offset;
72dc1c09 1820 D1("data to push to tty");
8ef5ba63
DJB		 1821 while (write_length_remaining) {
1822 if (test_bit(TTY_THROTTLED, &tty->flags))
1823 return -1;
1824 curr_write_len = tty_insert_flip_string
1825 (tty, urb->transfer_buffer +
1826 serial->curr_rx_urb_offset,
1827 write_length_remaining);
1828 serial->curr_rx_urb_offset += curr_write_len;
1829 write_length_remaining -= curr_write_len;
1830 tty_flip_buffer_push(tty);
72dc1c09 1831 }
72dc1c09 1832 }
8ef5ba63
DJB		 1833 if (write_length_remaining == 0) {
1834 serial->curr_rx_urb_offset = 0;
1835 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
72dc1c09 1836 }
8ef5ba63 1837 return write_length_remaining;
72dc1c09
GKH		 1838}
1839
8ef5ba63 1840
72dc1c09
GKH		 1841/* Base driver functions */
1842
1843static void hso_log_port(struct hso_device *hso_dev)
1844{
1845 char *port_type;
1846 char port_dev[20];
1847
1848 switch (hso_dev->port_spec & HSO_PORT_MASK) {
1849 case HSO_PORT_CONTROL:
1850 port_type = "Control";
1851 break;
1852 case HSO_PORT_APP:
1853 port_type = "Application";
1854 break;
1855 case HSO_PORT_GPS:
1856 port_type = "GPS";
1857 break;
1858 case HSO_PORT_GPS_CONTROL:
1859 port_type = "GPS control";
1860 break;
1861 case HSO_PORT_APP2:
1862 port_type = "Application2";
1863 break;
1864 case HSO_PORT_PCSC:
1865 port_type = "PCSC";
1866 break;
1867 case HSO_PORT_DIAG:
1868 port_type = "Diagnostic";
1869 break;
1870 case HSO_PORT_DIAG2:
1871 port_type = "Diagnostic2";
1872 break;
1873 case HSO_PORT_MODEM:
1874 port_type = "Modem";
1875 break;
1876 case HSO_PORT_NETWORK:
1877 port_type = "Network";
1878 break;
1879 default:
1880 port_type = "Unknown";
1881 break;
1882 }
1883 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
1884 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
1885 } else
1886 sprintf(port_dev, "/dev/%s%d", tty_filename,
1887 dev2ser(hso_dev)->minor);
1888
1889 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
1890 port_type, port_dev);
1891}
1892
1893static int hso_start_net_device(struct hso_device *hso_dev)
1894{
1895 int i, result = 0;
1896 struct hso_net *hso_net = dev2net(hso_dev);
1897
1898 if (!hso_net)
1899 return -ENODEV;
1900
1901 /* send URBs for all read buffers */
1902 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
1903
1904 /* Prep a receive URB */
1905 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
1906 hso_dev->usb,
1907 usb_rcvbulkpipe(hso_dev->usb,
1908 hso_net->in_endp->
1909 bEndpointAddress & 0x7F),
1910 hso_net->mux_bulk_rx_buf_pool[i],
1911 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
1912 hso_net);
1913
1914 /* Put it out there so the device can send us stuff */
1915 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
1916 GFP_NOIO);
1917 if (result)
1918 dev_warn(&hso_dev->usb->dev,
1919 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
1920 i, result);
1921 }
1922
1923 return result;
1924}
1925
1926static int hso_stop_net_device(struct hso_device *hso_dev)
1927{
1928 int i;
1929 struct hso_net *hso_net = dev2net(hso_dev);
1930
1931 if (!hso_net)
1932 return -ENODEV;
1933
1934 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
1935 if (hso_net->mux_bulk_rx_urb_pool[i])
1936 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
1937
1938 }
1939 if (hso_net->mux_bulk_tx_urb)
1940 usb_kill_urb(hso_net->mux_bulk_tx_urb);
1941
1942 return 0;
1943}
1944
1945static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
1946{
1947 int i, result = 0;
1948 struct hso_serial *serial = dev2ser(hso_dev);
1949
1950 if (!serial)
1951 return -ENODEV;
1952
1953 /* If it is not the MUX port fill in and submit a bulk urb (already
1954 * allocated in hso_serial_start) */
1955 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
1956 for (i = 0; i < serial->num_rx_urbs; i++) {
1957 usb_fill_bulk_urb(serial->rx_urb[i],
1958 serial->parent->usb,
1959 usb_rcvbulkpipe(serial->parent->usb,
1960 serial->in_endp->
1961 bEndpointAddress &
1962 0x7F),
1963 serial->rx_data[i],
1964 serial->rx_data_length,
1965 hso_std_serial_read_bulk_callback,
1966 serial);
1967 result = usb_submit_urb(serial->rx_urb[i], flags);
1968 if (result) {
1969 dev_warn(&serial->parent->usb->dev,
1970 "Failed to submit urb - res %d\n",
1971 result);
1972 break;
1973 }
1974 }
1975 } else {
1976 mutex_lock(&serial->shared_int->shared_int_lock);
1977 if (!serial->shared_int->use_count) {
1978 result =
1979 hso_mux_submit_intr_urb(serial->shared_int,
1980 hso_dev->usb, flags);
1981 }
1982 serial->shared_int->use_count++;
1983 mutex_unlock(&serial->shared_int->shared_int_lock);
1984 }
cd90ee17 1985
72dc1c09
GKH		 1986 return result;
1987}
1988
1989static int hso_stop_serial_device(struct hso_device *hso_dev)
1990{
1991 int i;
1992 struct hso_serial *serial = dev2ser(hso_dev);
1993
1994 if (!serial)
1995 return -ENODEV;
1996
1997 for (i = 0; i < serial->num_rx_urbs; i++) {
8ef5ba63 1998 if (serial->rx_urb[i]) {
72dc1c09 1999 usb_kill_urb(serial->rx_urb[i]);
8ef5ba63
DJB		 2000 serial->rx_urb_filled[i] = 0;
2001 }
72dc1c09 2002 }
8ef5ba63
DJB		 2003 serial->curr_rx_urb_idx = 0;
2004 serial->curr_rx_urb_offset = 0;
72dc1c09
GKH		 2005
2006 if (serial->tx_urb)
2007 usb_kill_urb(serial->tx_urb);
2008
2009 if (serial->shared_int) {
2010 mutex_lock(&serial->shared_int->shared_int_lock);
2011 if (serial->shared_int->use_count &&
2012 (--serial->shared_int->use_count == 0)) {
2013 struct urb *urb;
2014
2015 urb = serial->shared_int->shared_intr_urb;
2016 if (urb)
2017 usb_kill_urb(urb);
2018 }
2019 mutex_unlock(&serial->shared_int->shared_int_lock);
2020 }
2021
2022 return 0;
2023}
2024
2025static void hso_serial_common_free(struct hso_serial *serial)
2026{
2027 int i;
2028
2029 if (serial->parent->dev)
2030 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2031
2032 tty_unregister_device(tty_drv, serial->minor);
2033
2034 for (i = 0; i < serial->num_rx_urbs; i++) {
2035 /* unlink and free RX URB */
2036 usb_free_urb(serial->rx_urb[i]);
2037 /* free the RX buffer */
2038 kfree(serial->rx_data[i]);
2039 }
2040
2041 /* unlink and free TX URB */
2042 usb_free_urb(serial->tx_urb);
2043 kfree(serial->tx_data);
2044}
2045
2046static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2047 int rx_size, int tx_size)
2048{
2049 struct device *dev;
2050 int minor;
2051 int i;
2052
2053 minor = get_free_serial_index();
2054 if (minor < 0)
2055 goto exit;
2056
2057 /* register our minor number */
2058 serial->parent->dev = tty_register_device(tty_drv, minor,
2059 &serial->parent->interface->dev);
2060 dev = serial->parent->dev;
2061 dev->driver_data = serial->parent;
2062 i = device_create_file(dev, &dev_attr_hsotype);
2063
2064 /* fill in specific data for later use */
2065 serial->minor = minor;
2066 serial->magic = HSO_SERIAL_MAGIC;
2067 spin_lock_init(&serial->serial_lock);
2068 serial->num_rx_urbs = num_urbs;
2069
2070 /* RX, allocate urb and initialize */
2071
2072 /* prepare our RX buffer */
2073 serial->rx_data_length = rx_size;
2074 for (i = 0; i < serial->num_rx_urbs; i++) {
2075 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2076 if (!serial->rx_urb[i]) {
2077 dev_err(dev, "Could not allocate urb?\n");
2078 goto exit;
2079 }
2080 serial->rx_urb[i]->transfer_buffer = NULL;
2081 serial->rx_urb[i]->transfer_buffer_length = 0;
2082 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2083 GFP_KERNEL);
2084 if (!serial->rx_data[i]) {
2085 dev_err(dev, "%s - Out of memory\n", __func__);
2086 goto exit;
2087 }
2088 }
2089
2090 /* TX, allocate urb and initialize */
2091 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2092 if (!serial->tx_urb) {
2093 dev_err(dev, "Could not allocate urb?\n");
2094 goto exit;
2095 }
2096 serial->tx_urb->transfer_buffer = NULL;
2097 serial->tx_urb->transfer_buffer_length = 0;
2098 /* prepare our TX buffer */
2099 serial->tx_data_count = 0;
2100 serial->tx_buffer_count = 0;
2101 serial->tx_data_length = tx_size;
2102 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2103 if (!serial->tx_data) {
2104 dev_err(dev, "%s - Out of memory", __func__);
2105 goto exit;
2106 }
2107 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2108 if (!serial->tx_buffer) {
2109 dev_err(dev, "%s - Out of memory", __func__);
2110 goto exit;
2111 }
2112
2113 return 0;
2114exit:
2115 hso_serial_common_free(serial);
2116 return -1;
2117}
2118
2119/* Frees a general hso device */
2120static void hso_free_device(struct hso_device *hso_dev)
2121{
2122 kfree(hso_dev);
2123}
2124
2125/* Creates a general hso device */
2126static struct hso_device *hso_create_device(struct usb_interface *intf,
2127 int port_spec)
2128{
2129 struct hso_device *hso_dev;
2130
2131 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2132 if (!hso_dev)
2133 return NULL;
2134
2135 hso_dev->port_spec = port_spec;
2136 hso_dev->usb = interface_to_usbdev(intf);
2137 hso_dev->interface = intf;
2138 kref_init(&hso_dev->ref);
52429eb2
DJB		 2139 hso_dev->mutex = hso_get_free_mutex();
2140 if (!hso_dev->mutex) {
2141 kfree(hso_dev);
2142 return NULL;
2143 }
2144 mutex_init(&hso_dev->mutex->mutex);
72dc1c09
GKH		 2145 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2146 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2147
2148 return hso_dev;
2149}
2150
2151/* Removes a network device in the network device table */
2152static int remove_net_device(struct hso_device *hso_dev)
2153{
2154 int i;
2155
2156 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2157 if (network_table[i] == hso_dev) {
2158 network_table[i] = NULL;
2159 break;
2160 }
2161 }
2162 if (i == HSO_MAX_NET_DEVICES)
2163 return -1;
2164 return 0;
2165}
2166
2167/* Frees our network device */
2168static void hso_free_net_device(struct hso_device *hso_dev)
2169{
2170 int i;
2171 struct hso_net *hso_net = dev2net(hso_dev);
2172
2173 if (!hso_net)
2174 return;
2175
2176 /* start freeing */
2177 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2178 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2179 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2180 }
2181 usb_free_urb(hso_net->mux_bulk_tx_urb);
2182 kfree(hso_net->mux_bulk_tx_buf);
2183
2184 remove_net_device(hso_net->parent);
2185
2186 if (hso_net->net) {
2187 unregister_netdev(hso_net->net);
2188 free_netdev(hso_net->net);
2189 }
52429eb2 2190 hso_free_mutex(hso_dev->mutex);
72dc1c09
GKH		 2191 hso_free_device(hso_dev);
2192}
2193
2194/* initialize the network interface */
2195static void hso_net_init(struct net_device *net)
2196{
2197 struct hso_net *hso_net = netdev_priv(net);
2198
2199 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2200
2201 /* fill in the other fields */
2202 net->open = hso_net_open;
2203 net->stop = hso_net_close;
2204 net->hard_start_xmit = hso_net_start_xmit;
2205 net->tx_timeout = hso_net_tx_timeout;
2206 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2207 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2208 net->type = ARPHRD_NONE;
2209 net->mtu = DEFAULT_MTU - 14;
2210 net->tx_queue_len = 10;
2211 SET_ETHTOOL_OPS(net, &ops);
2212
2213 /* and initialize the semaphore */
2214 spin_lock_init(&hso_net->net_lock);
2215}
2216
2217/* Adds a network device in the network device table */
2218static int add_net_device(struct hso_device *hso_dev)
2219{
2220 int i;
2221
2222 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2223 if (network_table[i] == NULL) {
2224 network_table[i] = hso_dev;
2225 break;
2226 }
2227 }
2228 if (i == HSO_MAX_NET_DEVICES)
2229 return -1;
2230 return 0;
2231}
2232
2233static int hso_radio_toggle(void *data, enum rfkill_state state)
2234{
2235 struct hso_device *hso_dev = data;
2236 int enabled = (state == RFKILL_STATE_ON);
2237 int rv;
2238
52429eb2 2239 mutex_lock(&hso_dev->mutex->mutex);
72dc1c09
GKH		 2240 if (hso_dev->usb_gone)
2241 rv = 0;
2242 else
2243 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2244 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2245 USB_CTRL_SET_TIMEOUT);
52429eb2 2246 mutex_unlock(&hso_dev->mutex->mutex);
72dc1c09
GKH		 2247 return rv;
2248}
2249
2250/* Creates and sets up everything for rfkill */
2251static void hso_create_rfkill(struct hso_device *hso_dev,
2252 struct usb_interface *interface)
2253{
2254 struct hso_net *hso_net = dev2net(hso_dev);
939a9516 2255 struct device *dev = &hso_net->net->dev;
72dc1c09
GKH		 2256 char *rfkn;
2257
2258 hso_net->rfkill = rfkill_allocate(&interface_to_usbdev(interface)->dev,
db053c6b 2259 RFKILL_TYPE_WWAN);
72dc1c09 2260 if (!hso_net->rfkill) {
939a9516 2261 dev_err(dev, "%s - Out of memory\n", __func__);
72dc1c09
GKH		 2262 return;
2263 }
2264 rfkn = kzalloc(20, GFP_KERNEL);
2265 if (!rfkn) {
2266 rfkill_free(hso_net->rfkill);
939a9516
JM		 2267 hso_net->rfkill = NULL;
2268 dev_err(dev, "%s - Out of memory\n", __func__);
72dc1c09
GKH		 2269 return;
2270 }
2271 snprintf(rfkn, 20, "hso-%d",
2272 interface->altsetting->desc.bInterfaceNumber);
2273 hso_net->rfkill->name = rfkn;
2274 hso_net->rfkill->state = RFKILL_STATE_ON;
2275 hso_net->rfkill->data = hso_dev;
2276 hso_net->rfkill->toggle_radio = hso_radio_toggle;
2277 if (rfkill_register(hso_net->rfkill) < 0) {
2278 kfree(rfkn);
2279 hso_net->rfkill->name = NULL;
2280 rfkill_free(hso_net->rfkill);
939a9516
JM		 2281 hso_net->rfkill = NULL;
2282 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
72dc1c09
GKH		 2283 return;
2284 }
2285}
2286
2287/* Creates our network device */
2288static struct hso_device *hso_create_net_device(struct usb_interface *interface)
2289{
2290 int result, i;
2291 struct net_device *net;
2292 struct hso_net *hso_net;
2293 struct hso_device *hso_dev;
2294
2295 hso_dev = hso_create_device(interface, HSO_INTF_MUX | HSO_PORT_NETWORK);
2296 if (!hso_dev)
2297 return NULL;
2298
2299 /* allocate our network device, then we can put in our private data */
2300 /* call hso_net_init to do the basic initialization */
2301 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2302 if (!net) {
2303 dev_err(&interface->dev, "Unable to create ethernet device\n");
2304 goto exit;
2305 }
2306
2307 hso_net = netdev_priv(net);
2308
2309 hso_dev->port_data.dev_net = hso_net;
2310 hso_net->net = net;
2311 hso_net->parent = hso_dev;
2312
2313 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2314 USB_DIR_IN);
2315 if (!hso_net->in_endp) {
2316 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2317 goto exit;
2318 }
2319 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2320 USB_DIR_OUT);
2321 if (!hso_net->out_endp) {
2322 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2323 goto exit;
2324 }
2325 SET_NETDEV_DEV(net, &interface->dev);
2326
2327 /* registering our net device */
2328 result = register_netdev(net);
2329 if (result) {
2330 dev_err(&interface->dev, "Failed to register device\n");
2331 goto exit;
2332 }
2333
2334 /* start allocating */
2335 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2336 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2337 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2338 dev_err(&interface->dev, "Could not allocate rx urb\n");
2339 goto exit;
2340 }
2341 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2342 GFP_KERNEL);
2343 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2344 dev_err(&interface->dev, "Could not allocate rx buf\n");
2345 goto exit;
2346 }
2347 }
2348 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2349 if (!hso_net->mux_bulk_tx_urb) {
2350 dev_err(&interface->dev, "Could not allocate tx urb\n");
2351 goto exit;
2352 }
2353 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2354 if (!hso_net->mux_bulk_tx_buf) {
2355 dev_err(&interface->dev, "Could not allocate tx buf\n");
2356 goto exit;
2357 }
2358
2359 add_net_device(hso_dev);
2360
2361 hso_log_port(hso_dev);
2362
2363 hso_create_rfkill(hso_dev, interface);
2364
2365 return hso_dev;
2366exit:
2367 hso_free_net_device(hso_dev);
2368 return NULL;
2369}
2370
2371/* Frees an AT channel ( goes for both mux and non-mux ) */
2372static void hso_free_serial_device(struct hso_device *hso_dev)
2373{
2374 struct hso_serial *serial = dev2ser(hso_dev);
2375
2376 if (!serial)
2377 return;
2378 set_serial_by_index(serial->minor, NULL);
2379
2380 hso_serial_common_free(serial);
2381
2382 if (serial->shared_int) {
2383 mutex_lock(&serial->shared_int->shared_int_lock);
2384 if (--serial->shared_int->ref_count == 0)
2385 hso_free_shared_int(serial->shared_int);
2386 else
2387 mutex_unlock(&serial->shared_int->shared_int_lock);
2388 }
2389 kfree(serial);
2390 hso_free_device(hso_dev);
2391}
2392
2393/* Creates a bulk AT channel */
2394static struct hso_device *hso_create_bulk_serial_device(
2395 struct usb_interface *interface, int port)
2396{
2397 struct hso_device *hso_dev;
2398 struct hso_serial *serial;
2399 int num_urbs;
2400
2401 hso_dev = hso_create_device(interface, port);
2402 if (!hso_dev)
2403 return NULL;
2404
2405 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2406 if (!serial)
2407 goto exit;
2408
2409 serial->parent = hso_dev;
2410 hso_dev->port_data.dev_serial = serial;
2411
cd90ee17 2412 if (port & HSO_PORT_MODEM)
72dc1c09
GKH		 2413 num_urbs = 2;
2414 else
2415 num_urbs = 1;
2416
2417 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2418 BULK_URB_TX_SIZE))
2419 goto exit;
2420
2421 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2422 USB_DIR_IN);
2423 if (!serial->in_endp) {
2424 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
e57b641d 2425 goto exit2;
72dc1c09
GKH		 2426 }
2427
2428 if (!
2429 (serial->out_endp =
2430 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2431 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
e57b641d 2432 goto exit2;
72dc1c09
GKH		 2433 }
2434
2435 serial->write_data = hso_std_serial_write_data;
2436
2437 /* and record this serial */
2438 set_serial_by_index(serial->minor, serial);
2439
2440 /* setup the proc dirs and files if needed */
2441 hso_log_port(hso_dev);
2442
2443 /* done, return it */
2444 return hso_dev;
e57b641d
AB		 2445
2446exit2:
2447 hso_serial_common_free(serial);
72dc1c09 2448exit:
72dc1c09
GKH		 2449 kfree(serial);
2450 hso_free_device(hso_dev);
2451 return NULL;
2452}
2453
2454/* Creates a multiplexed AT channel */
2455static
2456struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2457 int port,
2458 struct hso_shared_int *mux)
2459{
2460 struct hso_device *hso_dev;
2461 struct hso_serial *serial;
2462 int port_spec;
2463
2464 port_spec = HSO_INTF_MUX;
2465 port_spec &= ~HSO_PORT_MASK;
2466
2467 port_spec |= hso_mux_to_port(port);
2468 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2469 return NULL;
2470
2471 hso_dev = hso_create_device(interface, port_spec);
2472 if (!hso_dev)
2473 return NULL;
2474
2475 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2476 if (!serial)
2477 goto exit;
2478
2479 hso_dev->port_data.dev_serial = serial;
2480 serial->parent = hso_dev;
2481
2482 if (hso_serial_common_create
2483 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2484 goto exit;
2485
2486 serial->tx_data_length--;
2487 serial->write_data = hso_mux_serial_write_data;
2488
2489 serial->shared_int = mux;
2490 mutex_lock(&serial->shared_int->shared_int_lock);
2491 serial->shared_int->ref_count++;
2492 mutex_unlock(&serial->shared_int->shared_int_lock);
2493
2494 /* and record this serial */
2495 set_serial_by_index(serial->minor, serial);
2496
2497 /* setup the proc dirs and files if needed */
2498 hso_log_port(hso_dev);
2499
2500 /* done, return it */
2501 return hso_dev;
2502
2503exit:
2504 if (serial) {
2505 tty_unregister_device(tty_drv, serial->minor);
2506 kfree(serial);
2507 }
2508 if (hso_dev)
2509 hso_free_device(hso_dev);
2510 return NULL;
2511
2512}
2513
2514static void hso_free_shared_int(struct hso_shared_int *mux)
2515{
2516 usb_free_urb(mux->shared_intr_urb);
2517 kfree(mux->shared_intr_buf);
2518 mutex_unlock(&mux->shared_int_lock);
2519 kfree(mux);
2520}
2521
2522static
2523struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2524{
2525 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2526
2527 if (!mux)
2528 return NULL;
2529
2530 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2531 USB_DIR_IN);
2532 if (!mux->intr_endp) {
2533 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2534 goto exit;
2535 }
2536
2537 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2538 if (!mux->shared_intr_urb) {
2539 dev_err(&interface->dev, "Could not allocate intr urb?");
2540 goto exit;
2541 }
2542 mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize,
2543 GFP_KERNEL);
2544 if (!mux->shared_intr_buf) {
2545 dev_err(&interface->dev, "Could not allocate intr buf?");
2546 goto exit;
2547 }
2548
2549 mutex_init(&mux->shared_int_lock);
2550
2551 return mux;
2552
2553exit:
2554 kfree(mux->shared_intr_buf);
2555 usb_free_urb(mux->shared_intr_urb);
2556 kfree(mux);
2557 return NULL;
2558}
2559
2560/* Gets the port spec for a certain interface */
2561static int hso_get_config_data(struct usb_interface *interface)
2562{
2563 struct usb_device *usbdev = interface_to_usbdev(interface);
2564 u8 config_data[17];
2565 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2566 s32 result;
2567
2568 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2569 0x86, 0xC0, 0, 0, config_data, 17,
2570 USB_CTRL_SET_TIMEOUT) != 0x11) {
2571 return -EIO;
2572 }
2573
2574 switch (config_data[if_num]) {
2575 case 0x0:
2576 result = 0;
2577 break;
2578 case 0x1:
2579 result = HSO_PORT_DIAG;
2580 break;
2581 case 0x2:
2582 result = HSO_PORT_GPS;
2583 break;
2584 case 0x3:
2585 result = HSO_PORT_GPS_CONTROL;
2586 break;
2587 case 0x4:
2588 result = HSO_PORT_APP;
2589 break;
2590 case 0x5:
2591 result = HSO_PORT_APP2;
2592 break;
2593 case 0x6:
2594 result = HSO_PORT_CONTROL;
2595 break;
2596 case 0x7:
2597 result = HSO_PORT_NETWORK;
2598 break;
2599 case 0x8:
2600 result = HSO_PORT_MODEM;
2601 break;
2602 case 0x9:
2603 result = HSO_PORT_MSD;
2604 break;
2605 case 0xa:
2606 result = HSO_PORT_PCSC;
2607 break;
2608 case 0xb:
2609 result = HSO_PORT_VOICE;
2610 break;
2611 default:
2612 result = 0;
2613 }
2614
2615 if (result)
2616 result |= HSO_INTF_BULK;
2617
2618 if (config_data[16] & 0x1)
2619 result |= HSO_INFO_CRC_BUG;
2620
2621 return result;
2622}
2623
2624/* called once for each interface upon device insertion */
2625static int hso_probe(struct usb_interface *interface,
2626 const struct usb_device_id *id)
2627{
2628 int mux, i, if_num, port_spec;
2629 unsigned char port_mask;
2630 struct hso_device *hso_dev = NULL;
2631 struct hso_shared_int *shared_int;
2632 struct hso_device *tmp_dev = NULL;
2633
2634 if_num = interface->altsetting->desc.bInterfaceNumber;
2635
2636 /* Get the interface/port specification from either driver_info or from
2637 * the device itself */
2638 if (id->driver_info)
2639 port_spec = ((u32 *)(id->driver_info))[if_num];
2640 else
2641 port_spec = hso_get_config_data(interface);
2642
2643 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2644 dev_err(&interface->dev, "Not our interface\n");
2645 return -ENODEV;
2646 }
2647 /* Check if we need to switch to alt interfaces prior to port
2648 * configuration */
2649 if (interface->num_altsetting > 1)
2650 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2651 interface->needs_remote_wakeup = 1;
2652
2653 /* Allocate new hso device(s) */
2654 switch (port_spec & HSO_INTF_MASK) {
2655 case HSO_INTF_MUX:
2656 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2657 /* Create the network device */
2658 if (!disable_net) {
2659 hso_dev = hso_create_net_device(interface);
2660 if (!hso_dev)
2661 goto exit;
2662 tmp_dev = hso_dev;
2663 }
2664 }
2665
2666 if (hso_get_mux_ports(interface, &port_mask))
2667 /* TODO: de-allocate everything */
2668 goto exit;
2669
2670 shared_int = hso_create_shared_int(interface);
2671 if (!shared_int)
2672 goto exit;
2673
2674 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2675 if (port_mask & i) {
2676 hso_dev = hso_create_mux_serial_device(
2677 interface, i, shared_int);
2678 if (!hso_dev)
2679 goto exit;
2680 }
2681 }
2682
2683 if (tmp_dev)
2684 hso_dev = tmp_dev;
2685 break;
2686
2687 case HSO_INTF_BULK:
2688 /* It's a regular bulk interface */
2689 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK)
2690 && !disable_net)
2691 hso_dev = hso_create_net_device(interface);
2692 else
2693 hso_dev =
2694 hso_create_bulk_serial_device(interface, port_spec);
2695 if (!hso_dev)
2696 goto exit;
2697 break;
2698 default:
2699 goto exit;
2700 }
2701
2702 usb_driver_claim_interface(&hso_driver, interface, hso_dev);
2703
2704 /* save our data pointer in this device */
2705 usb_set_intfdata(interface, hso_dev);
2706
2707 /* done */
2708 return 0;
2709exit:
2710 hso_free_interface(interface);
2711 return -ENODEV;
2712}
2713
2714/* device removed, cleaning up */
2715static void hso_disconnect(struct usb_interface *interface)
2716{
2717 hso_free_interface(interface);
2718
2719 /* remove reference of our private data */
2720 usb_set_intfdata(interface, NULL);
2721
2722 usb_driver_release_interface(&hso_driver, interface);
2723}
2724
2725static void async_get_intf(struct work_struct *data)
2726{
2727 struct hso_device *hso_dev =
2728 container_of(data, struct hso_device, async_get_intf);
2729 usb_autopm_get_interface(hso_dev->interface);
2730}
2731
2732static void async_put_intf(struct work_struct *data)
2733{
2734 struct hso_device *hso_dev =
2735 container_of(data, struct hso_device, async_put_intf);
2736 usb_autopm_put_interface(hso_dev->interface);
2737}
2738
2739static int hso_get_activity(struct hso_device *hso_dev)
2740{
2741 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2742 if (!hso_dev->is_active) {
2743 hso_dev->is_active = 1;
2744 schedule_work(&hso_dev->async_get_intf);
2745 }
2746 }
2747
2748 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
2749 return -EAGAIN;
2750
2751 usb_mark_last_busy(hso_dev->usb);
2752
2753 return 0;
2754}
2755
2756static int hso_put_activity(struct hso_device *hso_dev)
2757{
2758 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
2759 if (hso_dev->is_active) {
2760 hso_dev->is_active = 0;
2761 schedule_work(&hso_dev->async_put_intf);
2762 return -EAGAIN;
2763 }
2764 }
2765 hso_dev->is_active = 0;
2766 return 0;
2767}
2768
2769/* called by kernel when we need to suspend device */
2770static int hso_suspend(struct usb_interface *iface, pm_message_t message)
2771{
2772 int i, result;
2773
2774 /* Stop all serial ports */
2775 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
2776 if (serial_table[i] && (serial_table[i]->interface == iface)) {
2777 result = hso_stop_serial_device(serial_table[i]);
2778 if (result)
2779 goto out;
2780 }
2781 }
2782
2783 /* Stop all network ports */
2784 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2785 if (network_table[i] &&
2786 (network_table[i]->interface == iface)) {
2787 result = hso_stop_net_device(network_table[i]);
2788 if (result)
2789 goto out;
2790 }
2791 }
2792
2793out:
2794 return 0;
2795}
2796
2797/* called by kernel when we need to resume device */
2798static int hso_resume(struct usb_interface *iface)
2799{
2800 int i, result = 0;
2801 struct hso_net *hso_net;
2802
2803 /* Start all serial ports */
2804 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
2805 if (serial_table[i] && (serial_table[i]->interface == iface)) {
2806 if (dev2ser(serial_table[i])->open_count) {
2807 result =
2808 hso_start_serial_device(serial_table[i], GFP_NOIO);
2809 hso_kick_transmit(dev2ser(serial_table[i]));
2810 if (result)
2811 goto out;
2812 }
2813 }
2814 }
2815
2816 /* Start all network ports */
2817 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2818 if (network_table[i] &&
2819 (network_table[i]->interface == iface)) {
2820 hso_net = dev2net(network_table[i]);
89930b7b
DJB		 2821 if (hso_net->flags & IFF_UP) {
2822 /* First transmit any lingering data,
2823 then restart the device. */
2824 if (hso_net->skb_tx_buf) {
2825 dev_dbg(&iface->dev,
2826 "Transmitting"
2827 " lingering data\n");
2828 hso_net_start_xmit(hso_net->skb_tx_buf,
2829 hso_net->net);
2830 hso_net->skb_tx_buf = NULL;
2831 }
2832 result = hso_start_net_device(network_table[i]);
2833 if (result)
2834 goto out;
72dc1c09 2835 }
72dc1c09
GKH		 2836 }
2837 }
2838
2839out:
2840 return result;
2841}
2842
2843static void hso_serial_ref_free(struct kref *ref)
2844{
2845 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
2846
2847 hso_free_serial_device(hso_dev);
2848}
2849
2850static void hso_free_interface(struct usb_interface *interface)
2851{
2852 struct hso_serial *hso_dev;
2853 int i;
52429eb2
DJB		 2854 struct mutex *hso_mutex = NULL;
2855 int refcnt = 1;
72dc1c09
GKH		 2856
2857 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
2858 if (serial_table[i]
2859 && (serial_table[i]->interface == interface)) {
2860 hso_dev = dev2ser(serial_table[i]);
2861 if (hso_dev->tty)
2862 tty_hangup(hso_dev->tty);
52429eb2
DJB		 2863 hso_mutex = &hso_dev->parent->mutex->mutex;
2864 mutex_lock(hso_mutex);
72dc1c09 2865 hso_dev->parent->usb_gone = 1;
52429eb2
DJB		 2866 refcnt = kref_put(&serial_table[i]->ref,
2867 hso_serial_ref_free);
2868 mutex_unlock(hso_mutex);
72dc1c09
GKH		 2869 }
2870 }
2871
2872 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2873 if (network_table[i]
2874 && (network_table[i]->interface == interface)) {
2875 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
2876 /* hso_stop_net_device doesn't stop the net queue since
2877 * traffic needs to start it again when suspended */
2878 netif_stop_queue(dev2net(network_table[i])->net);
2879 hso_stop_net_device(network_table[i]);
2880 cancel_work_sync(&network_table[i]->async_put_intf);
2881 cancel_work_sync(&network_table[i]->async_get_intf);
0235f641 2882 if (rfk)
72dc1c09
GKH		 2883 rfkill_unregister(rfk);
2884 hso_free_net_device(network_table[i]);
2885 }
2886 }
52429eb2
DJB		 2887 if (refcnt == 0)
2888 hso_free_mutex(container_of(hso_mutex,
2889 struct hso_mutex_t, mutex));
72dc1c09
GKH		 2890}
2891
2892/* Helper functions */
2893
2894/* Get the endpoint ! */
2895static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
2896 int type, int dir)
2897{
2898 int i;
2899 struct usb_host_interface *iface = intf->cur_altsetting;
2900 struct usb_endpoint_descriptor *endp;
2901
2902 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
2903 endp = &iface->endpoint[i].desc;
2904 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
2905 ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == type))
2906 return endp;
2907 }
2908
2909 return NULL;
2910}
2911
2912/* Get the byte that describes which ports are enabled */
2913static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
2914{
2915 int i;
2916 struct usb_host_interface *iface = intf->cur_altsetting;
2917
2918 if (iface->extralen == 3) {
2919 *ports = iface->extra[2];
2920 return 0;
2921 }
2922
2923 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
2924 if (iface->endpoint[i].extralen == 3) {
2925 *ports = iface->endpoint[i].extra[2];
2926 return 0;
2927 }
2928 }
2929
2930 return -1;
2931}
2932
2933/* interrupt urb needs to be submitted, used for serial read of muxed port */
2934static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
2935 struct usb_device *usb, gfp_t gfp)
2936{
2937 int result;
2938
2939 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
2940 usb_rcvintpipe(usb,
2941 shared_int->intr_endp->bEndpointAddress & 0x7F),
2942 shared_int->shared_intr_buf,
2943 shared_int->intr_endp->wMaxPacketSize,
2944 intr_callback, shared_int,
2945 shared_int->intr_endp->bInterval);
2946
2947 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
2948 if (result)
2949 dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__,
2950 result);
2951
2952 return result;
2953}
2954
2955/* operations setup of the serial interface */
6c59f569 2956static const struct tty_operations hso_serial_ops = {
72dc1c09
GKH		 2957 .open = hso_serial_open,
2958 .close = hso_serial_close,
2959 .write = hso_serial_write,
2960 .write_room = hso_serial_write_room,
2961 .set_termios = hso_serial_set_termios,
2962 .chars_in_buffer = hso_serial_chars_in_buffer,
2963 .tiocmget = hso_serial_tiocmget,
2964 .tiocmset = hso_serial_tiocmset,
8ef5ba63 2965 .unthrottle = hso_unthrottle
72dc1c09
GKH		 2966};
2967
2968static struct usb_driver hso_driver = {
2969 .name = driver_name,
2970 .probe = hso_probe,
2971 .disconnect = hso_disconnect,
2972 .id_table = hso_ids,
2973 .suspend = hso_suspend,
2974 .resume = hso_resume,
9c8f92ae 2975 .reset_resume = hso_resume,
72dc1c09
GKH		 2976 .supports_autosuspend = 1,
2977};
2978
2979static int __init hso_init(void)
2980{
2981 int i;
2982 int result;
2983
2984 /* put it in the log */
2985 printk(KERN_INFO "hso: %s\n", version);
2986
2987 /* Initialise the serial table semaphore and table */
2988 spin_lock_init(&serial_table_lock);
52429eb2 2989 spin_lock_init(&hso_mutex_lock);
72dc1c09
GKH		 2990 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
2991 serial_table[i] = NULL;
2992
2993 /* allocate our driver using the proper amount of supported minors */
2994 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
2995 if (!tty_drv)
2996 return -ENOMEM;
2997
2998 /* fill in all needed values */
2999 tty_drv->magic = TTY_DRIVER_MAGIC;
3000 tty_drv->owner = THIS_MODULE;
3001 tty_drv->driver_name = driver_name;
3002 tty_drv->name = tty_filename;
3003
3004 /* if major number is provided as parameter, use that one */
3005 if (tty_major)
3006 tty_drv->major = tty_major;
3007
3008 tty_drv->minor_start = 0;
3009 tty_drv->num = HSO_SERIAL_TTY_MINORS;
3010 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3011 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3012 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3013 tty_drv->init_termios = tty_std_termios;
3014 tty_drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
3015 tty_drv->termios = hso_serial_termios;
3016 tty_drv->termios_locked = hso_serial_termios_locked;
3017 tty_set_operations(tty_drv, &hso_serial_ops);
3018
3019 /* register the tty driver */
3020 result = tty_register_driver(tty_drv);
3021 if (result) {
3022 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3023 __func__, result);
3024 return result;
3025 }
3026
3027 /* register this module as an usb driver */
3028 result = usb_register(&hso_driver);
3029 if (result) {
3030 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3031 result);
3032 /* cleanup serial interface */
3033 tty_unregister_driver(tty_drv);
3034 return result;
3035 }
3036
3037 /* done */
3038 return 0;
3039}
3040
3041static void __exit hso_exit(void)
3042{
3043 printk(KERN_INFO "hso: unloaded\n");
3044
3045 tty_unregister_driver(tty_drv);
3046 /* deregister the usb driver */
3047 usb_deregister(&hso_driver);
3048}
3049
3050/* Module definitions */
3051module_init(hso_init);
3052module_exit(hso_exit);
3053
3054MODULE_AUTHOR(MOD_AUTHOR);
3055MODULE_DESCRIPTION(MOD_DESCRIPTION);
3056MODULE_LICENSE(MOD_LICENSE);
3057MODULE_INFO(Version, DRIVER_VERSION);
3058
3059/* change the debug level (eg: insmod hso.ko debug=0x04) */
3060MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3061module_param(debug, int, S_IRUGO | S_IWUSR);
3062
3063/* set the major tty number (eg: insmod hso.ko tty_major=245) */
3064MODULE_PARM_DESC(tty_major, "Set the major tty number");
3065module_param(tty_major, int, S_IRUGO | S_IWUSR);
3066
3067/* disable network interface (eg: insmod hso.ko disable_net=1) */
3068MODULE_PARM_DESC(disable_net, "Disable the network interface");
3069module_param(disable_net, int, S_IRUGO | S_IWUSR);
Clone of davem's net-next-2.6 tree