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hso: add missing cancel_work_sync in disconnect()
[deliverable/linux.git] / drivers / net / usb / hso.c
CommitLineData
72dc1c09
GKH		 1/******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
11cd29b0
DJB		 6 * Filip Aben <f.aben@option.com>
7 * Denis Joseph Barrow <d.barow@option.com>
3b7d2b31 8 * Jan Dumon <j.dumon@option.com>
72dc1c09
GKH		 9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
10 * <ajb@spheresystems.co.uk>
11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
12 * Copyright (C) 2008 Novell, Inc.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
26 * USA
27 *
28 *
29 *****************************************************************************/
30
31/******************************************************************************
32 *
33 * Description of the device:
34 *
35 * Interface 0: Contains the IP network interface on the bulk end points.
36 * The multiplexed serial ports are using the interrupt and
37 * control endpoints.
38 * Interrupt contains a bitmap telling which multiplexed
39 * serialport needs servicing.
40 *
41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
42 * port is opened, as this have a huge impact on the network port
43 * throughput.
44 *
542f5482
DJB		 45 * Interface 2: Standard modem interface - circuit switched interface, this
46 * can be used to make a standard ppp connection however it
47 * should not be used in conjunction with the IP network interface
48 * enabled for USB performance reasons i.e. if using this set
49 * ideally disable_net=1.
72dc1c09
GKH		 50 *
51 *****************************************************************************/
52
53#include <linux/sched.h>
54#include <linux/slab.h>
55#include <linux/init.h>
56#include <linux/delay.h>
57#include <linux/netdevice.h>
58#include <linux/module.h>
59#include <linux/ethtool.h>
60#include <linux/usb.h>
72dc1c09
GKH		 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>
542f5482
DJB		 71#include <linux/serial_core.h>
72#include <linux/serial.h>
72dc1c09
GKH		 73
74
72dc1c09
GKH		 75#define MOD_AUTHOR "Option Wireless"
76#define MOD_DESCRIPTION "USB High Speed Option driver"
77#define MOD_LICENSE "GPL"
78
79#define HSO_MAX_NET_DEVICES 10
80#define HSO__MAX_MTU 2048
81#define DEFAULT_MTU 1500
82#define DEFAULT_MRU 1500
83
84#define CTRL_URB_RX_SIZE 1024
85#define CTRL_URB_TX_SIZE 64
86
87#define BULK_URB_RX_SIZE 4096
88#define BULK_URB_TX_SIZE 8192
89
90#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
91#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
92#define MUX_BULK_RX_BUF_COUNT 4
93#define USB_TYPE_OPTION_VENDOR 0x20
94
95/* These definitions are used with the struct hso_net flags element */
96/* - use *_bit operations on it. (bit indices not values.) */
97#define HSO_NET_RUNNING 0
98
99#define HSO_NET_TX_TIMEOUT (HZ*10)
100
72dc1c09
GKH		 101#define HSO_SERIAL_MAGIC 0x48534f31
102
103/* Number of ttys to handle */
104#define HSO_SERIAL_TTY_MINORS 256
105
106#define MAX_RX_URBS 2
107
72dc1c09
GKH		 108/*****************************************************************************/
109/* Debugging functions */
110/*****************************************************************************/
111#define D__(lvl_, fmt, arg...) \
112 do { \
113 printk(lvl_ "[%d:%s]: " fmt "\n", \
114 __LINE__, __func__, ## arg); \
115 } while (0)
116
117#define D_(lvl, args...) \
118 do { \
119 if (lvl & debug) \
120 D__(KERN_INFO, args); \
121 } while (0)
122
123#define D1(args...) D_(0x01, ##args)
124#define D2(args...) D_(0x02, ##args)
125#define D3(args...) D_(0x04, ##args)
126#define D4(args...) D_(0x08, ##args)
127#define D5(args...) D_(0x10, ##args)
128
129/*****************************************************************************/
130/* Enumerators */
131/*****************************************************************************/
132enum pkt_parse_state {
133 WAIT_IP,
134 WAIT_DATA,
135 WAIT_SYNC
136};
137
138/*****************************************************************************/
139/* Structs */
140/*****************************************************************************/
141
142struct hso_shared_int {
143 struct usb_endpoint_descriptor *intr_endp;
144 void *shared_intr_buf;
145 struct urb *shared_intr_urb;
146 struct usb_device *usb;
147 int use_count;
148 int ref_count;
149 struct mutex shared_int_lock;
150};
151
152struct hso_net {
153 struct hso_device *parent;
154 struct net_device *net;
155 struct rfkill *rfkill;
2e6d01ff 156 char name[8];
72dc1c09
GKH		 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
542f5482
DJB		 185#define BM_REQUEST_TYPE (0xa1)
186#define B_NOTIFICATION (0x20)
187#define W_VALUE (0x0)
542f5482
DJB		 188#define W_LENGTH (0x2)
189
190#define B_OVERRUN (0x1<<6)
191#define B_PARITY (0x1<<5)
192#define B_FRAMING (0x1<<4)
193#define B_RING_SIGNAL (0x1<<3)
194#define B_BREAK (0x1<<2)
195#define B_TX_CARRIER (0x1<<1)
196#define B_RX_CARRIER (0x1<<0)
197
198struct hso_serial_state_notification {
199 u8 bmRequestType;
200 u8 bNotification;
201 u16 wValue;
202 u16 wIndex;
203 u16 wLength;
204 u16 UART_state_bitmap;
ba2d3587 205} __packed;
542f5482
DJB		 206
207struct hso_tiocmget {
208 struct mutex mutex;
209 wait_queue_head_t waitq;
210 int intr_completed;
211 struct usb_endpoint_descriptor *endp;
212 struct urb *urb;
213 struct hso_serial_state_notification serial_state_notification;
214 u16 prev_UART_state_bitmap;
215 struct uart_icount icount;
216};
217
218
72dc1c09
GKH		 219struct hso_serial {
220 struct hso_device *parent;
221 int magic;
222 u8 minor;
223
224 struct hso_shared_int *shared_int;
225
226 /* rx/tx urb could be either a bulk urb or a control urb depending
227 on which serial port it is used on. */
228 struct urb *rx_urb[MAX_RX_URBS];
229 u8 num_rx_urbs;
230 u8 *rx_data[MAX_RX_URBS];
231 u16 rx_data_length; /* should contain allocated length */
232
233 struct urb *tx_urb;
234 u8 *tx_data;
235 u8 *tx_buffer;
236 u16 tx_data_length; /* should contain allocated length */
237 u16 tx_data_count;
238 u16 tx_buffer_count;
239 struct usb_ctrlrequest ctrl_req_tx;
240 struct usb_ctrlrequest ctrl_req_rx;
241
242 struct usb_endpoint_descriptor *in_endp;
243 struct usb_endpoint_descriptor *out_endp;
244
8ef5ba63 245 enum rx_ctrl_state rx_state;
72dc1c09
GKH		 246 u8 rts_state;
247 u8 dtr_state;
248 unsigned tx_urb_used:1;
249
5ce76e77 250 struct tty_port port;
72dc1c09 251 /* from usb_serial_port */
72dc1c09
GKH		 252 spinlock_t serial_lock;
253
254 int (*write_data) (struct hso_serial *serial);
542f5482 255 struct hso_tiocmget *tiocmget;
8ef5ba63
DJB		 256 /* Hacks required to get flow control
257 * working on the serial receive buffers
258 * so as not to drop characters on the floor.
259 */
260 int curr_rx_urb_idx;
8ef5ba63
DJB		 261 u8 rx_urb_filled[MAX_RX_URBS];
262 struct tasklet_struct unthrottle_tasklet;
72dc1c09
GKH		 263};
264
265struct hso_device {
266 union {
267 struct hso_serial *dev_serial;
268 struct hso_net *dev_net;
269 } port_data;
270
271 u32 port_spec;
272
273 u8 is_active;
274 u8 usb_gone;
275 struct work_struct async_get_intf;
276 struct work_struct async_put_intf;
277
278 struct usb_device *usb;
279 struct usb_interface *interface;
280
281 struct device *dev;
282 struct kref ref;
ab153d84 283 struct mutex mutex;
72dc1c09
GKH		 284};
285
286/* Type of interface */
287#define HSO_INTF_MASK 0xFF00
288#define HSO_INTF_MUX 0x0100
289#define HSO_INTF_BULK 0x0200
290
291/* Type of port */
292#define HSO_PORT_MASK 0xFF
293#define HSO_PORT_NO_PORT 0x0
294#define HSO_PORT_CONTROL 0x1
295#define HSO_PORT_APP 0x2
296#define HSO_PORT_GPS 0x3
297#define HSO_PORT_PCSC 0x4
298#define HSO_PORT_APP2 0x5
299#define HSO_PORT_GPS_CONTROL 0x6
300#define HSO_PORT_MSD 0x7
301#define HSO_PORT_VOICE 0x8
302#define HSO_PORT_DIAG2 0x9
303#define HSO_PORT_DIAG 0x10
304#define HSO_PORT_MODEM 0x11
305#define HSO_PORT_NETWORK 0x12
306
307/* Additional device info */
308#define HSO_INFO_MASK 0xFF000000
309#define HSO_INFO_CRC_BUG 0x01000000
310
311/*****************************************************************************/
312/* Prototypes */
313/*****************************************************************************/
314/* Serial driver functions */
20b9d177 315static int hso_serial_tiocmset(struct tty_struct *tty,
72dc1c09
GKH		 316 unsigned int set, unsigned int clear);
317static void ctrl_callback(struct urb *urb);
8ef5ba63 318static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
72dc1c09
GKH		 319static void hso_kick_transmit(struct hso_serial *serial);
320/* Helper functions */
321static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
322 struct usb_device *usb, gfp_t gfp);
68a351c5
JD		 323static void handle_usb_error(int status, const char *function,
324 struct hso_device *hso_dev);
72dc1c09
GKH		 325static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
326 int type, int dir);
327static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
328static void hso_free_interface(struct usb_interface *intf);
329static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
330static int hso_stop_serial_device(struct hso_device *hso_dev);
331static int hso_start_net_device(struct hso_device *hso_dev);
332static void hso_free_shared_int(struct hso_shared_int *shared_int);
333static int hso_stop_net_device(struct hso_device *hso_dev);
334static void hso_serial_ref_free(struct kref *ref);
8ef5ba63
DJB		 335static void hso_std_serial_read_bulk_callback(struct urb *urb);
336static int hso_mux_serial_read(struct hso_serial *serial);
72dc1c09
GKH		 337static void async_get_intf(struct work_struct *data);
338static void async_put_intf(struct work_struct *data);
339static int hso_put_activity(struct hso_device *hso_dev);
340static int hso_get_activity(struct hso_device *hso_dev);
542f5482 341static void tiocmget_intr_callback(struct urb *urb);
72dc1c09
GKH		 342/*****************************************************************************/
343/* Helping functions */
344/*****************************************************************************/
345
346/* #define DEBUG */
347
0235f641
GKH		 348static inline struct hso_net *dev2net(struct hso_device *hso_dev)
349{
350 return hso_dev->port_data.dev_net;
351}
352
353static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
354{
355 return hso_dev->port_data.dev_serial;
356}
72dc1c09
GKH		 357
358/* Debugging functions */
359#ifdef DEBUG
360static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
361 unsigned int len)
362{
0235f641 363 static char name[255];
72dc1c09 364
0235f641
GKH		 365 sprintf(name, "hso[%d:%s]", line_count, func_name);
366 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
72dc1c09
GKH		 367}
368
369#define DUMP(buf_, len_) \
9ce673d5 370 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
72dc1c09
GKH		 371
372#define DUMP1(buf_, len_) \
373 do { \
374 if (0x01 & debug) \
375 DUMP(buf_, len_); \
376 } while (0)
377#else
378#define DUMP(buf_, len_)
379#define DUMP1(buf_, len_)
380#endif
381
382/* module parameters */
383static int debug;
384static int tty_major;
385static int disable_net;
386
387/* driver info */
388static const char driver_name[] = "hso";
389static const char tty_filename[] = "ttyHS";
242647bc 390static const char *version = __FILE__ ": " MOD_AUTHOR;
72dc1c09
GKH		 391/* the usb driver itself (registered in hso_init) */
392static struct usb_driver hso_driver;
393/* serial structures */
394static struct tty_driver *tty_drv;
395static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
396static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
397static spinlock_t serial_table_lock;
72dc1c09
GKH		 398
399static const s32 default_port_spec[] = {
400 HSO_INTF_MUX | HSO_PORT_NETWORK,
401 HSO_INTF_BULK | HSO_PORT_DIAG,
402 HSO_INTF_BULK | HSO_PORT_MODEM,
403 0
404};
405
406static const s32 icon321_port_spec[] = {
407 HSO_INTF_MUX | HSO_PORT_NETWORK,
408 HSO_INTF_BULK | HSO_PORT_DIAG2,
409 HSO_INTF_BULK | HSO_PORT_MODEM,
410 HSO_INTF_BULK | HSO_PORT_DIAG,
411 0
412};
413
414#define default_port_device(vendor, product) \
415 USB_DEVICE(vendor, product), \
416 .driver_info = (kernel_ulong_t)default_port_spec
417
418#define icon321_port_device(vendor, product) \
419 USB_DEVICE(vendor, product), \
420 .driver_info = (kernel_ulong_t)icon321_port_spec
421
422/* list of devices we support */
423static const struct usb_device_id hso_ids[] = {
424 {default_port_device(0x0af0, 0x6711)},
425 {default_port_device(0x0af0, 0x6731)},
426 {default_port_device(0x0af0, 0x6751)},
427 {default_port_device(0x0af0, 0x6771)},
428 {default_port_device(0x0af0, 0x6791)},
429 {default_port_device(0x0af0, 0x6811)},
430 {default_port_device(0x0af0, 0x6911)},
431 {default_port_device(0x0af0, 0x6951)},
432 {default_port_device(0x0af0, 0x6971)},
433 {default_port_device(0x0af0, 0x7011)},
434 {default_port_device(0x0af0, 0x7031)},
435 {default_port_device(0x0af0, 0x7051)},
436 {default_port_device(0x0af0, 0x7071)},
437 {default_port_device(0x0af0, 0x7111)},
438 {default_port_device(0x0af0, 0x7211)},
439 {default_port_device(0x0af0, 0x7251)},
440 {default_port_device(0x0af0, 0x7271)},
441 {default_port_device(0x0af0, 0x7311)},
442 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
443 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
444 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
95eacee8 445 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
72dc1c09
GKH		 446 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
447 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
67dd8246 448 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
72dc1c09
GKH		 449 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
450 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
451 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
bab04c3a 452 {USB_DEVICE(0x0af0, 0x7701)},
ec157937 453 {USB_DEVICE(0x0af0, 0x7706)},
bab04c3a
DJB		 454 {USB_DEVICE(0x0af0, 0x7801)},
455 {USB_DEVICE(0x0af0, 0x7901)},
ec157937
JD		 456 {USB_DEVICE(0x0af0, 0x7A01)},
457 {USB_DEVICE(0x0af0, 0x7A05)},
9961d842
JD		 458 {USB_DEVICE(0x0af0, 0x8200)},
459 {USB_DEVICE(0x0af0, 0x8201)},
ec157937
JD		 460 {USB_DEVICE(0x0af0, 0x8300)},
461 {USB_DEVICE(0x0af0, 0x8302)},
462 {USB_DEVICE(0x0af0, 0x8304)},
463 {USB_DEVICE(0x0af0, 0x8400)},
dd7496f2
FA		 464 {USB_DEVICE(0x0af0, 0x8600)},
465 {USB_DEVICE(0x0af0, 0x8800)},
466 {USB_DEVICE(0x0af0, 0x8900)},
5c7bf2f4 467 {USB_DEVICE(0x0af0, 0x9000)},
61ab9efd 468 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */
9961d842 469 {USB_DEVICE(0x0af0, 0xd035)},
67dd8246 470 {USB_DEVICE(0x0af0, 0xd055)},
9961d842
JD		 471 {USB_DEVICE(0x0af0, 0xd155)},
472 {USB_DEVICE(0x0af0, 0xd255)},
473 {USB_DEVICE(0x0af0, 0xd057)},
474 {USB_DEVICE(0x0af0, 0xd157)},
475 {USB_DEVICE(0x0af0, 0xd257)},
476 {USB_DEVICE(0x0af0, 0xd357)},
ec157937
JD		 477 {USB_DEVICE(0x0af0, 0xd058)},
478 {USB_DEVICE(0x0af0, 0xc100)},
72dc1c09
GKH		 479 {}
480};
481MODULE_DEVICE_TABLE(usb, hso_ids);
482
483/* Sysfs attribute */
484static ssize_t hso_sysfs_show_porttype(struct device *dev,
485 struct device_attribute *attr,
486 char *buf)
487{
1aec5bdf 488 struct hso_device *hso_dev = dev_get_drvdata(dev);
72dc1c09
GKH		 489 char *port_name;
490
491 if (!hso_dev)
492 return 0;
493
494 switch (hso_dev->port_spec & HSO_PORT_MASK) {
495 case HSO_PORT_CONTROL:
496 port_name = "Control";
497 break;
498 case HSO_PORT_APP:
499 port_name = "Application";
500 break;
501 case HSO_PORT_APP2:
502 port_name = "Application2";
503 break;
504 case HSO_PORT_GPS:
505 port_name = "GPS";
506 break;
507 case HSO_PORT_GPS_CONTROL:
508 port_name = "GPS Control";
509 break;
510 case HSO_PORT_PCSC:
511 port_name = "PCSC";
512 break;
513 case HSO_PORT_DIAG:
514 port_name = "Diagnostic";
515 break;
516 case HSO_PORT_DIAG2:
517 port_name = "Diagnostic2";
518 break;
519 case HSO_PORT_MODEM:
520 port_name = "Modem";
521 break;
522 case HSO_PORT_NETWORK:
523 port_name = "Network";
524 break;
525 default:
526 port_name = "Unknown";
527 break;
528 }
529
530 return sprintf(buf, "%s\n", port_name);
531}
532static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
533
8ef5ba63
DJB		 534static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
535{
536 int idx;
537
538 for (idx = 0; idx < serial->num_rx_urbs; idx++)
539 if (serial->rx_urb[idx] == urb)
540 return idx;
541 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
542 return -1;
543}
544
72dc1c09
GKH		 545/* converts mux value to a port spec value */
546static u32 hso_mux_to_port(int mux)
547{
548 u32 result;
549
550 switch (mux) {
551 case 0x1:
552 result = HSO_PORT_CONTROL;
553 break;
554 case 0x2:
555 result = HSO_PORT_APP;
556 break;
557 case 0x4:
558 result = HSO_PORT_PCSC;
559 break;
560 case 0x8:
561 result = HSO_PORT_GPS;
562 break;
563 case 0x10:
564 result = HSO_PORT_APP2;
565 break;
566 default:
567 result = HSO_PORT_NO_PORT;
568 }
569 return result;
570}
571
572/* converts port spec value to a mux value */
573static u32 hso_port_to_mux(int port)
574{
575 u32 result;
576
577 switch (port & HSO_PORT_MASK) {
578 case HSO_PORT_CONTROL:
579 result = 0x0;
580 break;
581 case HSO_PORT_APP:
582 result = 0x1;
583 break;
584 case HSO_PORT_PCSC:
585 result = 0x2;
586 break;
587 case HSO_PORT_GPS:
588 result = 0x3;
589 break;
590 case HSO_PORT_APP2:
591 result = 0x4;
592 break;
593 default:
594 result = 0x0;
595 }
596 return result;
597}
598
599static struct hso_serial *get_serial_by_shared_int_and_type(
600 struct hso_shared_int *shared_int,
601 int mux)
602{
603 int i, port;
604
605 port = hso_mux_to_port(mux);
606
607 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
8e95a202
JP		 608 if (serial_table[i] &&
609 (dev2ser(serial_table[i])->shared_int == shared_int) &&
610 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
72dc1c09
GKH		 611 return dev2ser(serial_table[i]);
612 }
613 }
614
615 return NULL;
616}
617
618static struct hso_serial *get_serial_by_index(unsigned index)
619{
0235f641 620 struct hso_serial *serial = NULL;
72dc1c09
GKH		 621 unsigned long flags;
622
72dc1c09 623 spin_lock_irqsave(&serial_table_lock, flags);
0235f641
GKH		 624 if (serial_table[index])
625 serial = dev2ser(serial_table[index]);
72dc1c09
GKH		 626 spin_unlock_irqrestore(&serial_table_lock, flags);
627
628 return serial;
629}
630
631static int get_free_serial_index(void)
632{
633 int index;
634 unsigned long flags;
635
636 spin_lock_irqsave(&serial_table_lock, flags);
637 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
638 if (serial_table[index] == NULL) {
639 spin_unlock_irqrestore(&serial_table_lock, flags);
640 return index;
641 }
642 }
643 spin_unlock_irqrestore(&serial_table_lock, flags);
644
645 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
646 return -1;
647}
648
649static void set_serial_by_index(unsigned index, struct hso_serial *serial)
650{
651 unsigned long flags;
0235f641 652
72dc1c09
GKH		 653 spin_lock_irqsave(&serial_table_lock, flags);
654 if (serial)
655 serial_table[index] = serial->parent;
656 else
657 serial_table[index] = NULL;
658 spin_unlock_irqrestore(&serial_table_lock, flags);
659}
660
68a351c5
JD		 661static void handle_usb_error(int status, const char *function,
662 struct hso_device *hso_dev)
72dc1c09
GKH		 663{
664 char *explanation;
665
666 switch (status) {
667 case -ENODEV:
668 explanation = "no device";
669 break;
670 case -ENOENT:
671 explanation = "endpoint not enabled";
672 break;
673 case -EPIPE:
674 explanation = "endpoint stalled";
675 break;
676 case -ENOSPC:
677 explanation = "not enough bandwidth";
678 break;
679 case -ESHUTDOWN:
680 explanation = "device disabled";
681 break;
682 case -EHOSTUNREACH:
683 explanation = "device suspended";
684 break;
685 case -EINVAL:
686 case -EAGAIN:
687 case -EFBIG:
688 case -EMSGSIZE:
689 explanation = "internal error";
690 break;
68a351c5
JD		 691 case -EILSEQ:
692 case -EPROTO:
693 case -ETIME:
694 case -ETIMEDOUT:
695 explanation = "protocol error";
696 if (hso_dev)
26c1f1f5 697 usb_queue_reset_device(hso_dev->interface);
68a351c5 698 break;
72dc1c09
GKH		 699 default:
700 explanation = "unknown status";
701 break;
702 }
68a351c5
JD		 703
704 /* log a meaningful explanation of an USB status */
72dc1c09
GKH		 705 D1("%s: received USB status - %s (%d)", function, explanation, status);
706}
707
708/* Network interface functions */
709
710/* called when net interface is brought up by ifconfig */
711static int hso_net_open(struct net_device *net)
712{
713 struct hso_net *odev = netdev_priv(net);
714 unsigned long flags = 0;
715
716 if (!odev) {
717 dev_err(&net->dev, "No net device !\n");
718 return -ENODEV;
719 }
720
721 odev->skb_tx_buf = NULL;
722
723 /* setup environment */
724 spin_lock_irqsave(&odev->net_lock, flags);
725 odev->rx_parse_state = WAIT_IP;
726 odev->rx_buf_size = 0;
727 odev->rx_buf_missing = sizeof(struct iphdr);
728 spin_unlock_irqrestore(&odev->net_lock, flags);
729
72dc1c09
GKH		 730 /* We are up and running. */
731 set_bit(HSO_NET_RUNNING, &odev->flags);
889bd9b6 732 hso_start_net_device(odev->parent);
72dc1c09
GKH		 733
734 /* Tell the kernel we are ready to start receiving from it */
735 netif_start_queue(net);
736
737 return 0;
738}
739
740/* called when interface is brought down by ifconfig */
741static int hso_net_close(struct net_device *net)
742{
743 struct hso_net *odev = netdev_priv(net);
744
745 /* we don't need the queue anymore */
746 netif_stop_queue(net);
747 /* no longer running */
748 clear_bit(HSO_NET_RUNNING, &odev->flags);
749
750 hso_stop_net_device(odev->parent);
751
752 /* done */
753 return 0;
754}
755
756/* USB tells is xmit done, we should start the netqueue again */
757static void write_bulk_callback(struct urb *urb)
758{
759 struct hso_net *odev = urb->context;
760 int status = urb->status;
761
762 /* Sanity check */
763 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
764 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
765 return;
766 }
767
768 /* Do we still have a valid kernel network device? */
769 if (!netif_device_present(odev->net)) {
770 dev_err(&urb->dev->dev, "%s: net device not present\n",
771 __func__);
772 return;
773 }
774
775 /* log status, but don't act on it, we don't need to resubmit anything
776 * anyhow */
777 if (status)
68a351c5 778 handle_usb_error(status, __func__, odev->parent);
72dc1c09
GKH		 779
780 hso_put_activity(odev->parent);
781
782 /* Tell the network interface we are ready for another frame */
783 netif_wake_queue(odev->net);
784}
785
786/* called by kernel when we need to transmit a packet */
25a79c41
SH		 787static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
788 struct net_device *net)
72dc1c09
GKH		 789{
790 struct hso_net *odev = netdev_priv(net);
791 int result;
792
793 /* Tell the kernel, "No more frames 'til we are done with this one." */
794 netif_stop_queue(net);
795 if (hso_get_activity(odev->parent) == -EAGAIN) {
796 odev->skb_tx_buf = skb;
6ed10654 797 return NETDEV_TX_OK;
72dc1c09
GKH		 798 }
799
800 /* log if asked */
801 DUMP1(skb->data, skb->len);
802 /* Copy it from kernel memory to OUR memory */
803 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
804 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
805
806 /* Fill in the URB for shipping it out. */
807 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
808 odev->parent->usb,
809 usb_sndbulkpipe(odev->parent->usb,
810 odev->out_endp->
811 bEndpointAddress & 0x7F),
812 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
813 odev);
814
815 /* Deal with the Zero Length packet problem, I hope */
816 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
817
818 /* Send the URB on its merry way. */
819 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
820 if (result) {
821 dev_warn(&odev->parent->interface->dev,
8a5c9c49 822 "failed mux_bulk_tx_urb %d\n", result);
72dc1c09
GKH		 823 net->stats.tx_errors++;
824 netif_start_queue(net);
825 } else {
826 net->stats.tx_packets++;
827 net->stats.tx_bytes += skb->len;
72dc1c09
GKH		 828 }
829 dev_kfree_skb(skb);
830 /* we're done */
5b2c4b97 831 return NETDEV_TX_OK;
72dc1c09
GKH		 832}
833
0fc0b732 834static const struct ethtool_ops ops = {
72dc1c09
GKH		 835 .get_link = ethtool_op_get_link
836};
837
838/* called when a packet did not ack after watchdogtimeout */
839static void hso_net_tx_timeout(struct net_device *net)
840{
841 struct hso_net *odev = netdev_priv(net);
842
843 if (!odev)
844 return;
845
846 /* Tell syslog we are hosed. */
847 dev_warn(&net->dev, "Tx timed out.\n");
848
849 /* Tear the waiting frame off the list */
8e95a202
JP		 850 if (odev->mux_bulk_tx_urb &&
851 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
72dc1c09
GKH		 852 usb_unlink_urb(odev->mux_bulk_tx_urb);
853
854 /* Update statistics */
855 net->stats.tx_errors++;
856}
857
858/* make a real packet from the received USB buffer */
859static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
860 unsigned int count, unsigned char is_eop)
861{
862 unsigned short temp_bytes;
863 unsigned short buffer_offset = 0;
864 unsigned short frame_len;
865 unsigned char *tmp_rx_buf;
866
867 /* log if needed */
868 D1("Rx %d bytes", count);
869 DUMP(ip_pkt, min(128, (int)count));
870
871 while (count) {
872 switch (odev->rx_parse_state) {
873 case WAIT_IP:
874 /* waiting for IP header. */
875 /* wanted bytes - size of ip header */
876 temp_bytes =
877 (count <
878 odev->rx_buf_missing) ? count : odev->
879 rx_buf_missing;
880
881 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
882 odev->rx_buf_size, ip_pkt + buffer_offset,
883 temp_bytes);
884
885 odev->rx_buf_size += temp_bytes;
886 buffer_offset += temp_bytes;
887 odev->rx_buf_missing -= temp_bytes;
888 count -= temp_bytes;
889
890 if (!odev->rx_buf_missing) {
891 /* header is complete allocate an sk_buffer and
892 * continue to WAIT_DATA */
893 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
894
895 if ((frame_len > DEFAULT_MRU) ||
896 (frame_len < sizeof(struct iphdr))) {
897 dev_err(&odev->net->dev,
898 "Invalid frame (%d) length\n",
899 frame_len);
900 odev->rx_parse_state = WAIT_SYNC;
901 continue;
902 }
903 /* Allocate an sk_buff */
d65a68a8
PZ		 904 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
905 frame_len);
72dc1c09
GKH		 906 if (!odev->skb_rx_buf) {
907 /* We got no receive buffer. */
908 D1("could not allocate memory");
909 odev->rx_parse_state = WAIT_SYNC;
910 return;
911 }
72dc1c09
GKH		 912
913 /* Copy what we got so far. make room for iphdr
914 * after tail. */
915 tmp_rx_buf =
916 skb_put(odev->skb_rx_buf,
917 sizeof(struct iphdr));
918 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
919 sizeof(struct iphdr));
920
921 /* ETH_HLEN */
922 odev->rx_buf_size = sizeof(struct iphdr);
923
924 /* Filip actually use .tot_len */
925 odev->rx_buf_missing =
926 frame_len - sizeof(struct iphdr);
927 odev->rx_parse_state = WAIT_DATA;
928 }
929 break;
930
931 case WAIT_DATA:
932 temp_bytes = (count < odev->rx_buf_missing)
933 ? count : odev->rx_buf_missing;
934
935 /* Copy the rest of the bytes that are left in the
936 * buffer into the waiting sk_buf. */
937 /* Make room for temp_bytes after tail. */
938 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
939 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
940
941 odev->rx_buf_missing -= temp_bytes;
942 count -= temp_bytes;
943 buffer_offset += temp_bytes;
944 odev->rx_buf_size += temp_bytes;
945 if (!odev->rx_buf_missing) {
946 /* Packet is complete. Inject into stack. */
947 /* We have IP packet here */
09640e63 948 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
72dc1c09
GKH		 949 skb_reset_mac_header(odev->skb_rx_buf);
950
951 /* Ship it off to the kernel */
952 netif_rx(odev->skb_rx_buf);
953 /* No longer our buffer. */
954 odev->skb_rx_buf = NULL;
955
956 /* update out statistics */
957 odev->net->stats.rx_packets++;
958
959 odev->net->stats.rx_bytes += odev->rx_buf_size;
960
961 odev->rx_buf_size = 0;
962 odev->rx_buf_missing = sizeof(struct iphdr);
963 odev->rx_parse_state = WAIT_IP;
964 }
965 break;
966
967 case WAIT_SYNC:
968 D1(" W_S");
969 count = 0;
970 break;
971 default:
972 D1(" ");
973 count--;
974 break;
975 }
976 }
977
978 /* Recovery mechanism for WAIT_SYNC state. */
979 if (is_eop) {
980 if (odev->rx_parse_state == WAIT_SYNC) {
981 odev->rx_parse_state = WAIT_IP;
982 odev->rx_buf_size = 0;
983 odev->rx_buf_missing = sizeof(struct iphdr);
984 }
985 }
986}
987
5591c75d
JP		 988static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
989{
990 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
991 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
992
993 if (((rest == 5) || (rest == 6)) &&
994 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
995 crc_check, 4)) {
996 urb->actual_length -= 4;
997 }
998}
999
72dc1c09
GKH		 1000/* Moving data from usb to kernel (in interrupt state) */
1001static void read_bulk_callback(struct urb *urb)
1002{
1003 struct hso_net *odev = urb->context;
1004 struct net_device *net;
1005 int result;
1006 int status = urb->status;
1007
1008 /* is al ok? (Filip: Who's Al ?) */
1009 if (status) {
68a351c5 1010 handle_usb_error(status, __func__, odev->parent);
72dc1c09
GKH		 1011 return;
1012 }
1013
1014 /* Sanity check */
1015 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1016 D1("BULK IN callback but driver is not active!");
1017 return;
1018 }
1019 usb_mark_last_busy(urb->dev);
1020
1021 net = odev->net;
1022
1023 if (!netif_device_present(net)) {
1024 /* Somebody killed our network interface... */
1025 return;
1026 }
1027
5591c75d
JP		 1028 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1029 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
72dc1c09
GKH		 1030
1031 /* do we even have a packet? */
1032 if (urb->actual_length) {
1033 /* Handle the IP stream, add header and push it onto network
1034 * stack if the packet is complete. */
1035 spin_lock(&odev->net_lock);
1036 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1037 (urb->transfer_buffer_length >
1038 urb->actual_length) ? 1 : 0);
1039 spin_unlock(&odev->net_lock);
1040 }
1041
1042 /* We are done with this URB, resubmit it. Prep the USB to wait for
1043 * another frame. Reuse same as received. */
1044 usb_fill_bulk_urb(urb,
1045 odev->parent->usb,
1046 usb_rcvbulkpipe(odev->parent->usb,
1047 odev->in_endp->
1048 bEndpointAddress & 0x7F),
1049 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1050 read_bulk_callback, odev);
1051
1052 /* Give this to the USB subsystem so it can tell us when more data
1053 * arrives. */
1054 result = usb_submit_urb(urb, GFP_ATOMIC);
1055 if (result)
1056 dev_warn(&odev->parent->interface->dev,
8a5c9c49 1057 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
72dc1c09
GKH		 1058 result);
1059}
1060
1061/* Serial driver functions */
1062
ac9720c3 1063static void hso_init_termios(struct ktermios *termios)
72dc1c09 1064{
72dc1c09
GKH		 1065 /*
1066 * The default requirements for this device are:
1067 */
72dc1c09
GKH		 1068 termios->c_iflag &=
1069 ~(IGNBRK /* disable ignore break */
1070 | BRKINT /* disable break causes interrupt */
1071 | PARMRK /* disable mark parity errors */
1072 | ISTRIP /* disable clear high bit of input characters */
1073 | INLCR /* disable translate NL to CR */
1074 | IGNCR /* disable ignore CR */
1075 | ICRNL /* disable translate CR to NL */
1076 | IXON); /* disable enable XON/XOFF flow control */
1077
1078 /* disable postprocess output characters */
1079 termios->c_oflag &= ~OPOST;
1080
1081 termios->c_lflag &=
1082 ~(ECHO /* disable echo input characters */
1083 | ECHONL /* disable echo new line */
1084 | ICANON /* disable erase, kill, werase, and rprnt
1085 special characters */
1086 | ISIG /* disable interrupt, quit, and suspend special
1087 characters */
1088 | IEXTEN); /* disable non-POSIX special characters */
1089
1090 termios->c_cflag &=
1091 ~(CSIZE /* no size */
1092 | PARENB /* disable parity bit */
1093 | CBAUD /* clear current baud rate */
1094 | CBAUDEX); /* clear current buad rate */
1095
1096 termios->c_cflag |= CS8; /* character size 8 bits */
1097
1098 /* baud rate 115200 */
ac9720c3
AC		 1099 tty_termios_encode_baud_rate(termios, 115200, 115200);
1100}
1101
1102static void _hso_serial_set_termios(struct tty_struct *tty,
1103 struct ktermios *old)
1104{
30409420 1105 struct hso_serial *serial = tty->driver_data;
ac9720c3
AC		 1106
1107 if (!serial) {
1108 printk(KERN_ERR "%s: no tty structures", __func__);
1109 return;
1110 }
1111
1112 D4("port %d", serial->minor);
72dc1c09
GKH		 1113
1114 /*
ac9720c3 1115 * Fix up unsupported bits
72dc1c09 1116 */
adc8d746 1117 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
ac9720c3 1118
adc8d746 1119 tty->termios.c_cflag &=
ac9720c3
AC		 1120 ~(CSIZE /* no size */
1121 | PARENB /* disable parity bit */
1122 | CBAUD /* clear current baud rate */
1123 | CBAUDEX); /* clear current buad rate */
1124
adc8d746 1125 tty->termios.c_cflag |= CS8; /* character size 8 bits */
ac9720c3
AC		 1126
1127 /* baud rate 115200 */
1128 tty_encode_baud_rate(tty, 115200, 115200);
72dc1c09
GKH		 1129}
1130
8ef5ba63
DJB		 1131static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1132{
1133 int result;
8ef5ba63
DJB		 1134 /* We are done with this URB, resubmit it. Prep the USB to wait for
1135 * another frame */
1136 usb_fill_bulk_urb(urb, serial->parent->usb,
1137 usb_rcvbulkpipe(serial->parent->usb,
1138 serial->in_endp->
1139 bEndpointAddress & 0x7F),
1140 urb->transfer_buffer, serial->rx_data_length,
1141 hso_std_serial_read_bulk_callback, serial);
1142 /* Give this to the USB subsystem so it can tell us when more data
1143 * arrives. */
1144 result = usb_submit_urb(urb, GFP_ATOMIC);
1145 if (result) {
1146 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1147 __func__, result);
1148 }
1149}
1150
1151
1152
1153
1154static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1155{
1156 int count;
1157 struct urb *curr_urb;
1158
1159 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1160 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1161 count = put_rxbuf_data(curr_urb, serial);
1162 if (count == -1)
1163 return;
1164 if (count == 0) {
1165 serial->curr_rx_urb_idx++;
1166 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1167 serial->curr_rx_urb_idx = 0;
1168 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1169 }
1170 }
1171}
1172
1173static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1174{
1175 int count = 0;
1176 struct urb *urb;
1177
1178 urb = serial->rx_urb[0];
5ce76e77 1179 if (serial->port.count > 0) {
8ef5ba63
DJB		 1180 count = put_rxbuf_data(urb, serial);
1181 if (count == -1)
1182 return;
1183 }
1184 /* Re issue a read as long as we receive data. */
1185
1186 if (count == 0 && ((urb->actual_length != 0) ||
1187 (serial->rx_state == RX_PENDING))) {
1188 serial->rx_state = RX_SENT;
1189 hso_mux_serial_read(serial);
1190 } else
1191 serial->rx_state = RX_IDLE;
1192}
1193
1194
1195/* read callback for Diag and CS port */
1196static void hso_std_serial_read_bulk_callback(struct urb *urb)
1197{
1198 struct hso_serial *serial = urb->context;
1199 int status = urb->status;
1200
4ccd0bb9
DC		 1201 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1202
8ef5ba63
DJB		 1203 /* sanity check */
1204 if (!serial) {
1205 D1("serial == NULL");
1206 return;
4ccd0bb9
DC		 1207 }
1208 if (status) {
68a351c5 1209 handle_usb_error(status, __func__, serial->parent);
8ef5ba63
DJB		 1210 return;
1211 }
1212
8ef5ba63
DJB		 1213 D1("Actual length = %d\n", urb->actual_length);
1214 DUMP1(urb->transfer_buffer, urb->actual_length);
1215
1216 /* Anyone listening? */
5ce76e77 1217 if (serial->port.count == 0)
8ef5ba63
DJB		 1218 return;
1219
4ccd0bb9
DC		 1220 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1221 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1222 /* Valid data, handle RX data */
1223 spin_lock(&serial->serial_lock);
1224 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1225 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1226 spin_unlock(&serial->serial_lock);
8ef5ba63
DJB		 1227}
1228
1229/*
1230 * This needs to be a tasklet otherwise we will
1231 * end up recursively calling this function.
1232 */
0227abc9 1233static void hso_unthrottle_tasklet(struct hso_serial *serial)
8ef5ba63
DJB		 1234{
1235 unsigned long flags;
1236
1237 spin_lock_irqsave(&serial->serial_lock, flags);
1238 if ((serial->parent->port_spec & HSO_INTF_MUX))
1239 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1240 else
1241 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1242 spin_unlock_irqrestore(&serial->serial_lock, flags);
1243}
1244
1245static void hso_unthrottle(struct tty_struct *tty)
1246{
30409420 1247 struct hso_serial *serial = tty->driver_data;
8ef5ba63
DJB		 1248
1249 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1250}
1251
72dc1c09
GKH		 1252/* open the requested serial port */
1253static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1254{
1255 struct hso_serial *serial = get_serial_by_index(tty->index);
ab153d84 1256 int result;
72dc1c09
GKH		 1257
1258 /* sanity check */
1259 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
e136e303 1260 WARN_ON(1);
72dc1c09
GKH		 1261 tty->driver_data = NULL;
1262 D1("Failed to open port");
1263 return -ENODEV;
1264 }
1265
ab153d84 1266 mutex_lock(&serial->parent->mutex);
ab153d84
DM		 1267 result = usb_autopm_get_interface(serial->parent->interface);
1268 if (result < 0)
72dc1c09
GKH		 1269 goto err_out;
1270
1271 D1("Opening %d", serial->minor);
72dc1c09
GKH		 1272
1273 /* setup */
1274 tty->driver_data = serial;
9f8c0b08 1275 tty_port_tty_set(&serial->port, tty);
72dc1c09 1276
2f9889a2 1277 /* check for port already opened, if not set the termios */
5ce76e77
JS		 1278 serial->port.count++;
1279 if (serial->port.count == 1) {
8ef5ba63 1280 serial->rx_state = RX_IDLE;
72dc1c09
GKH		 1281 /* Force default termio settings */
1282 _hso_serial_set_termios(tty, NULL);
8ef5ba63
DJB		 1283 tasklet_init(&serial->unthrottle_tasklet,
1284 (void (*)(unsigned long))hso_unthrottle_tasklet,
1285 (unsigned long)serial);
ab153d84
DM		 1286 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1287 if (result) {
72dc1c09 1288 hso_stop_serial_device(serial->parent);
5ce76e77 1289 serial->port.count--;
29bd3bc1
OS		 1290 } else {
1291 kref_get(&serial->parent->ref);
72dc1c09
GKH		 1292 }
1293 } else {
1294 D1("Port was already open");
1295 }
1296
1297 usb_autopm_put_interface(serial->parent->interface);
1298
1299 /* done */
ab153d84 1300 if (result)
20b9d177 1301 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
72dc1c09 1302err_out:
ab153d84
DM		 1303 mutex_unlock(&serial->parent->mutex);
1304 return result;
72dc1c09
GKH		 1305}
1306
1307/* close the requested serial port */
1308static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1309{
1310 struct hso_serial *serial = tty->driver_data;
1311 u8 usb_gone;
1312
1313 D1("Closing serial port");
1314
e136e303
AC		 1315 /* Open failed, no close cleanup required */
1316 if (serial == NULL)
1317 return;
1318
ab153d84 1319 mutex_lock(&serial->parent->mutex);
72dc1c09
GKH		 1320 usb_gone = serial->parent->usb_gone;
1321
1322 if (!usb_gone)
1323 usb_autopm_get_interface(serial->parent->interface);
1324
1325 /* reset the rts and dtr */
1326 /* do the actual close */
5ce76e77 1327 serial->port.count--;
dcfcb256 1328
5ce76e77
JS		 1329 if (serial->port.count <= 0) {
1330 serial->port.count = 0;
9f8c0b08 1331 tty_port_tty_set(&serial->port, NULL);
72dc1c09
GKH		 1332 if (!usb_gone)
1333 hso_stop_serial_device(serial->parent);
8ef5ba63 1334 tasklet_kill(&serial->unthrottle_tasklet);
72dc1c09 1335 }
8ef5ba63 1336
72dc1c09
GKH		 1337 if (!usb_gone)
1338 usb_autopm_put_interface(serial->parent->interface);
ab153d84
DM		 1339
1340 mutex_unlock(&serial->parent->mutex);
72dc1c09
GKH		 1341}
1342
1343/* close the requested serial port */
1344static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1345 int count)
1346{
30409420 1347 struct hso_serial *serial = tty->driver_data;
72dc1c09
GKH		 1348 int space, tx_bytes;
1349 unsigned long flags;
1350
1351 /* sanity check */
1352 if (serial == NULL) {
1353 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1354 return -ENODEV;
1355 }
1356
1357 spin_lock_irqsave(&serial->serial_lock, flags);
1358
1359 space = serial->tx_data_length - serial->tx_buffer_count;
1360 tx_bytes = (count < space) ? count : space;
1361
1362 if (!tx_bytes)
1363 goto out;
1364
1365 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1366 serial->tx_buffer_count += tx_bytes;
1367
1368out:
1369 spin_unlock_irqrestore(&serial->serial_lock, flags);
1370
1371 hso_kick_transmit(serial);
1372 /* done */
1373 return tx_bytes;
1374}
1375
1376/* how much room is there for writing */
1377static int hso_serial_write_room(struct tty_struct *tty)
1378{
30409420 1379 struct hso_serial *serial = tty->driver_data;
72dc1c09
GKH		 1380 int room;
1381 unsigned long flags;
1382
1383 spin_lock_irqsave(&serial->serial_lock, flags);
1384 room = serial->tx_data_length - serial->tx_buffer_count;
1385 spin_unlock_irqrestore(&serial->serial_lock, flags);
1386
1387 /* return free room */
1388 return room;
1389}
1390
29bd3bc1
OS		 1391static void hso_serial_cleanup(struct tty_struct *tty)
1392{
1393 struct hso_serial *serial = tty->driver_data;
1394
1395 if (!serial)
1396 return;
1397
1398 kref_put(&serial->parent->ref, hso_serial_ref_free);
1399}
1400
72dc1c09
GKH		 1401/* setup the term */
1402static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1403{
30409420 1404 struct hso_serial *serial = tty->driver_data;
72dc1c09
GKH		 1405 unsigned long flags;
1406
1407 if (old)
1408 D5("Termios called with: cflags new[%d] - old[%d]",
adc8d746 1409 tty->termios.c_cflag, old->c_cflag);
72dc1c09
GKH		 1410
1411 /* the actual setup */
1412 spin_lock_irqsave(&serial->serial_lock, flags);
5ce76e77 1413 if (serial->port.count)
72dc1c09
GKH		 1414 _hso_serial_set_termios(tty, old);
1415 else
adc8d746 1416 tty->termios = *old;
72dc1c09
GKH		 1417 spin_unlock_irqrestore(&serial->serial_lock, flags);
1418
1419 /* done */
72dc1c09
GKH		 1420}
1421
1422/* how many characters in the buffer */
1423static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1424{
30409420 1425 struct hso_serial *serial = tty->driver_data;
72dc1c09
GKH		 1426 int chars;
1427 unsigned long flags;
1428
1429 /* sanity check */
1430 if (serial == NULL)
1431 return 0;
1432
1433 spin_lock_irqsave(&serial->serial_lock, flags);
1434 chars = serial->tx_buffer_count;
1435 spin_unlock_irqrestore(&serial->serial_lock, flags);
1436
1437 return chars;
1438}
0227abc9
HE		 1439static int tiocmget_submit_urb(struct hso_serial *serial,
1440 struct hso_tiocmget *tiocmget,
1441 struct usb_device *usb)
542f5482
DJB		 1442{
1443 int result;
1444
1445 if (serial->parent->usb_gone)
1446 return -ENODEV;
1447 usb_fill_int_urb(tiocmget->urb, usb,
1448 usb_rcvintpipe(usb,
1449 tiocmget->endp->
1450 bEndpointAddress & 0x7F),
1451 &tiocmget->serial_state_notification,
1452 sizeof(struct hso_serial_state_notification),
1453 tiocmget_intr_callback, serial,
1454 tiocmget->endp->bInterval);
1455 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1456 if (result) {
1457 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1458 result);
1459 }
1460 return result;
1461
1462}
1463
1464static void tiocmget_intr_callback(struct urb *urb)
1465{
1466 struct hso_serial *serial = urb->context;
1467 struct hso_tiocmget *tiocmget;
1468 int status = urb->status;
1469 u16 UART_state_bitmap, prev_UART_state_bitmap;
1470 struct uart_icount *icount;
1471 struct hso_serial_state_notification *serial_state_notification;
1472 struct usb_device *usb;
e5e97ee9 1473 int if_num;
542f5482
DJB		 1474
1475 /* Sanity checks */
1476 if (!serial)
1477 return;
1478 if (status) {
68a351c5 1479 handle_usb_error(status, __func__, serial->parent);
542f5482
DJB		 1480 return;
1481 }
e5e97ee9
DW		 1482
1483 /* tiocmget is only supported on HSO_PORT_MODEM */
542f5482
DJB		 1484 tiocmget = serial->tiocmget;
1485 if (!tiocmget)
1486 return;
e5e97ee9
DW		 1487 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
1488
542f5482 1489 usb = serial->parent->usb;
e5e97ee9
DW		 1490 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1491
1492 /* wIndex should be the USB interface number of the port to which the
1493 * notification applies, which should always be the Modem port.
1494 */
542f5482
DJB		 1495 serial_state_notification = &tiocmget->serial_state_notification;
1496 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1497 serial_state_notification->bNotification != B_NOTIFICATION ||
1498 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
e5e97ee9 1499 le16_to_cpu(serial_state_notification->wIndex) != if_num ||
542f5482
DJB		 1500 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1501 dev_warn(&usb->dev,
1502 "hso received invalid serial state notification\n");
1503 DUMP(serial_state_notification,
9ce673d5 1504 sizeof(struct hso_serial_state_notification));
542f5482
DJB		 1505 } else {
1506
1507 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1508 UART_state_bitmap);
1509 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1510 icount = &tiocmget->icount;
1511 spin_lock(&serial->serial_lock);
1512 if ((UART_state_bitmap & B_OVERRUN) !=
1513 (prev_UART_state_bitmap & B_OVERRUN))
1514 icount->parity++;
1515 if ((UART_state_bitmap & B_PARITY) !=
1516 (prev_UART_state_bitmap & B_PARITY))
1517 icount->parity++;
1518 if ((UART_state_bitmap & B_FRAMING) !=
1519 (prev_UART_state_bitmap & B_FRAMING))
1520 icount->frame++;
1521 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1522 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1523 icount->rng++;
1524 if ((UART_state_bitmap & B_BREAK) !=
1525 (prev_UART_state_bitmap & B_BREAK))
1526 icount->brk++;
1527 if ((UART_state_bitmap & B_TX_CARRIER) !=
1528 (prev_UART_state_bitmap & B_TX_CARRIER))
1529 icount->dsr++;
1530 if ((UART_state_bitmap & B_RX_CARRIER) !=
1531 (prev_UART_state_bitmap & B_RX_CARRIER))
1532 icount->dcd++;
1533 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1534 spin_unlock(&serial->serial_lock);
1535 tiocmget->intr_completed = 1;
1536 wake_up_interruptible(&tiocmget->waitq);
1537 }
1538 memset(serial_state_notification, 0,
1539 sizeof(struct hso_serial_state_notification));
1540 tiocmget_submit_urb(serial,
1541 tiocmget,
1542 serial->parent->usb);
1543}
1544
1545/*
1546 * next few functions largely stolen from drivers/serial/serial_core.c
1547 */
1548/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1549 * - mask passed in arg for lines of interest
1550 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1551 * Caller should use TIOCGICOUNT to see which one it was
1552 */
1553static int
1554hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1555{
1556 DECLARE_WAITQUEUE(wait, current);
1557 struct uart_icount cprev, cnow;
1558 struct hso_tiocmget *tiocmget;
1559 int ret;
1560
1561 tiocmget = serial->tiocmget;
1562 if (!tiocmget)
1563 return -ENOENT;
1564 /*
1565 * note the counters on entry
1566 */
1567 spin_lock_irq(&serial->serial_lock);
1568 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1569 spin_unlock_irq(&serial->serial_lock);
1570 add_wait_queue(&tiocmget->waitq, &wait);
1571 for (;;) {
1572 spin_lock_irq(&serial->serial_lock);
1573 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1574 spin_unlock_irq(&serial->serial_lock);
1575 set_current_state(TASK_INTERRUPTIBLE);
1576 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1577 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1578 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1579 ret = 0;
1580 break;
1581 }
1582 schedule();
1583 /* see if a signal did it */
1584 if (signal_pending(current)) {
1585 ret = -ERESTARTSYS;
1586 break;
1587 }
1588 cprev = cnow;
1589 }
1590 current->state = TASK_RUNNING;
1591 remove_wait_queue(&tiocmget->waitq, &wait);
1592
1593 return ret;
1594}
1595
1596/*
1597 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1598 * Return: write counters to the user passed counter struct
1599 * NB: both 1->0 and 0->1 transitions are counted except for
1600 * RI where only 0->1 is counted.
1601 */
0bca1b91
AC		 1602static int hso_get_count(struct tty_struct *tty,
1603 struct serial_icounter_struct *icount)
542f5482 1604{
542f5482 1605 struct uart_icount cnow;
30409420 1606 struct hso_serial *serial = tty->driver_data;
542f5482
DJB		 1607 struct hso_tiocmget *tiocmget = serial->tiocmget;
1608
22ad7499 1609 memset(icount, 0, sizeof(struct serial_icounter_struct));
7011e660 1610
542f5482
DJB		 1611 if (!tiocmget)
1612 return -ENOENT;
1613 spin_lock_irq(&serial->serial_lock);
1614 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1615 spin_unlock_irq(&serial->serial_lock);
1616
0bca1b91
AC		 1617 icount->cts = cnow.cts;
1618 icount->dsr = cnow.dsr;
1619 icount->rng = cnow.rng;
1620 icount->dcd = cnow.dcd;
1621 icount->rx = cnow.rx;
1622 icount->tx = cnow.tx;
1623 icount->frame = cnow.frame;
1624 icount->overrun = cnow.overrun;
1625 icount->parity = cnow.parity;
1626 icount->brk = cnow.brk;
1627 icount->buf_overrun = cnow.buf_overrun;
542f5482 1628
0bca1b91 1629 return 0;
542f5482
DJB		 1630}
1631
72dc1c09 1632
60b33c13 1633static int hso_serial_tiocmget(struct tty_struct *tty)
72dc1c09 1634{
542f5482 1635 int retval;
30409420 1636 struct hso_serial *serial = tty->driver_data;
542f5482
DJB		 1637 struct hso_tiocmget *tiocmget;
1638 u16 UART_state_bitmap;
72dc1c09
GKH		 1639
1640 /* sanity check */
1641 if (!serial) {
1642 D1("no tty structures");
1643 return -EINVAL;
1644 }
542f5482
DJB		 1645 spin_lock_irq(&serial->serial_lock);
1646 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
72dc1c09 1647 ((serial->dtr_state) ? TIOCM_DTR : 0);
542f5482
DJB		 1648 tiocmget = serial->tiocmget;
1649 if (tiocmget) {
1650
1651 UART_state_bitmap = le16_to_cpu(
1652 tiocmget->prev_UART_state_bitmap);
1653 if (UART_state_bitmap & B_RING_SIGNAL)
1654 retval |= TIOCM_RNG;
1655 if (UART_state_bitmap & B_RX_CARRIER)
1656 retval |= TIOCM_CD;
1657 if (UART_state_bitmap & B_TX_CARRIER)
1658 retval |= TIOCM_DSR;
1659 }
1660 spin_unlock_irq(&serial->serial_lock);
1661 return retval;
72dc1c09
GKH		 1662}
1663
20b9d177 1664static int hso_serial_tiocmset(struct tty_struct *tty,
72dc1c09
GKH		 1665 unsigned int set, unsigned int clear)
1666{
1667 int val = 0;
1668 unsigned long flags;
1669 int if_num;
30409420 1670 struct hso_serial *serial = tty->driver_data;
72dc1c09
GKH		 1671
1672 /* sanity check */
1673 if (!serial) {
1674 D1("no tty structures");
1675 return -EINVAL;
1676 }
0e0367e9
JD		 1677
1678 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1679 return -EINVAL;
1680
72dc1c09
GKH		 1681 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1682
1683 spin_lock_irqsave(&serial->serial_lock, flags);
1684 if (set & TIOCM_RTS)
1685 serial->rts_state = 1;
1686 if (set & TIOCM_DTR)
1687 serial->dtr_state = 1;
1688
1689 if (clear & TIOCM_RTS)
1690 serial->rts_state = 0;
1691 if (clear & TIOCM_DTR)
1692 serial->dtr_state = 0;
1693
1694 if (serial->dtr_state)
1695 val |= 0x01;
1696 if (serial->rts_state)
1697 val |= 0x02;
1698
1699 spin_unlock_irqrestore(&serial->serial_lock, flags);
1700
1701 return usb_control_msg(serial->parent->usb,
1702 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1703 0x21, val, if_num, NULL, 0,
1704 USB_CTRL_SET_TIMEOUT);
1705}
1706
6caa76b7 1707static int hso_serial_ioctl(struct tty_struct *tty,
542f5482
DJB		 1708 unsigned int cmd, unsigned long arg)
1709{
30409420 1710 struct hso_serial *serial = tty->driver_data;
542f5482
DJB		 1711 int ret = 0;
1712 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1713
1714 if (!serial)
1715 return -ENODEV;
1716 switch (cmd) {
1717 case TIOCMIWAIT:
1718 ret = hso_wait_modem_status(serial, arg);
1719 break;
542f5482
DJB		 1720 default:
1721 ret = -ENOIOCTLCMD;
1722 break;
1723 }
1724 return ret;
1725}
1726
1727
72dc1c09
GKH		 1728/* starts a transmit */
1729static void hso_kick_transmit(struct hso_serial *serial)
1730{
1731 u8 *temp;
1732 unsigned long flags;
1733 int res;
1734
1735 spin_lock_irqsave(&serial->serial_lock, flags);
1736 if (!serial->tx_buffer_count)
1737 goto out;
1738
1739 if (serial->tx_urb_used)
1740 goto out;
1741
1742 /* Wakeup USB interface if necessary */
1743 if (hso_get_activity(serial->parent) == -EAGAIN)
1744 goto out;
1745
1746 /* Switch pointers around to avoid memcpy */
1747 temp = serial->tx_buffer;
1748 serial->tx_buffer = serial->tx_data;
1749 serial->tx_data = temp;
1750 serial->tx_data_count = serial->tx_buffer_count;
1751 serial->tx_buffer_count = 0;
1752
1753 /* If temp is set, it means we switched buffers */
1754 if (temp && serial->write_data) {
1755 res = serial->write_data(serial);
1756 if (res >= 0)
1757 serial->tx_urb_used = 1;
1758 }
1759out:
1760 spin_unlock_irqrestore(&serial->serial_lock, flags);
1761}
1762
1763/* make a request (for reading and writing data to muxed serial port) */
1764static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1765 struct urb *ctrl_urb,
1766 struct usb_ctrlrequest *ctrl_req,
1767 u8 *ctrl_urb_data, u32 size)
1768{
1769 int result;
1770 int pipe;
1771
1772 /* Sanity check */
1773 if (!serial || !ctrl_urb || !ctrl_req) {
1774 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1775 return -EINVAL;
1776 }
1777
1778 /* initialize */
1779 ctrl_req->wValue = 0;
b74f62c1
DJB		 1780 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1781 ctrl_req->wLength = cpu_to_le16(size);
72dc1c09
GKH		 1782
1783 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1784 /* Reading command */
1785 ctrl_req->bRequestType = USB_DIR_IN |
1786 USB_TYPE_OPTION_VENDOR |
1787 USB_RECIP_INTERFACE;
1788 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1789 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1790 } else {
1791 /* Writing command */
1792 ctrl_req->bRequestType = USB_DIR_OUT |
1793 USB_TYPE_OPTION_VENDOR |
1794 USB_RECIP_INTERFACE;
1795 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1796 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1797 }
1798 /* syslog */
1799 D2("%s command (%02x) len: %d, port: %d",
1800 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1801 ctrl_req->bRequestType, ctrl_req->wLength, port);
1802
1803 /* Load ctrl urb */
1804 ctrl_urb->transfer_flags = 0;
1805 usb_fill_control_urb(ctrl_urb,
1806 serial->parent->usb,
1807 pipe,
1808 (u8 *) ctrl_req,
1809 ctrl_urb_data, size, ctrl_callback, serial);
1810 /* Send it on merry way */
1811 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1812 if (result) {
1813 dev_err(&ctrl_urb->dev->dev,
8a5c9c49 1814 "%s failed submit ctrl_urb %d type %d\n", __func__,
72dc1c09
GKH		 1815 result, type);
1816 return result;
1817 }
1818
1819 /* done */
1820 return size;
1821}
1822
1823/* called by intr_callback when read occurs */
1824static int hso_mux_serial_read(struct hso_serial *serial)
1825{
1826 if (!serial)
1827 return -EINVAL;
1828
1829 /* clean data */
1830 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1831 /* make the request */
1832
1833 if (serial->num_rx_urbs != 1) {
1834 dev_err(&serial->parent->interface->dev,
1835 "ERROR: mux'd reads with multiple buffers "
1836 "not possible\n");
1837 return 0;
1838 }
1839 return mux_device_request(serial,
1840 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1841 serial->parent->port_spec & HSO_PORT_MASK,
1842 serial->rx_urb[0],
1843 &serial->ctrl_req_rx,
1844 serial->rx_data[0], serial->rx_data_length);
1845}
1846
1847/* used for muxed serial port callback (muxed serial read) */
1848static void intr_callback(struct urb *urb)
1849{
1850 struct hso_shared_int *shared_int = urb->context;
1851 struct hso_serial *serial;
1852 unsigned char *port_req;
1853 int status = urb->status;
1854 int i;
1855
1856 usb_mark_last_busy(urb->dev);
1857
1858 /* sanity check */
1859 if (!shared_int)
1860 return;
1861
1862 /* status check */
1863 if (status) {
68a351c5 1864 handle_usb_error(status, __func__, NULL);
72dc1c09
GKH		 1865 return;
1866 }
1867 D4("\n--- Got intr callback 0x%02X ---", status);
1868
1869 /* what request? */
1870 port_req = urb->transfer_buffer;
1871 D4(" port_req = 0x%.2X\n", *port_req);
1872 /* loop over all muxed ports to find the one sending this */
1873 for (i = 0; i < 8; i++) {
1874 /* max 8 channels on MUX */
1875 if (*port_req & (1 << i)) {
1876 serial = get_serial_by_shared_int_and_type(shared_int,
1877 (1 << i));
1878 if (serial != NULL) {
1879 D1("Pending read interrupt on port %d\n", i);
8ef5ba63 1880 spin_lock(&serial->serial_lock);
f4763e96 1881 if (serial->rx_state == RX_IDLE &&
5ce76e77 1882 serial->port.count > 0) {
72dc1c09
GKH		 1883 /* Setup and send a ctrl req read on
1884 * port i */
f4763e96 1885 if (!serial->rx_urb_filled[0]) {
8ef5ba63
DJB		 1886 serial->rx_state = RX_SENT;
1887 hso_mux_serial_read(serial);
1888 } else
1889 serial->rx_state = RX_PENDING;
72dc1c09 1890 } else {
f4763e96
JD		 1891 D1("Already a read pending on "
1892 "port %d or port not open\n", i);
72dc1c09 1893 }
8ef5ba63 1894 spin_unlock(&serial->serial_lock);
72dc1c09
GKH		 1895 }
1896 }
1897 }
1898 /* Resubmit interrupt urb */
1899 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1900}
1901
1902/* called for writing to muxed serial port */
1903static int hso_mux_serial_write_data(struct hso_serial *serial)
1904{
1905 if (NULL == serial)
1906 return -EINVAL;
1907
1908 return mux_device_request(serial,
1909 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1910 serial->parent->port_spec & HSO_PORT_MASK,
1911 serial->tx_urb,
1912 &serial->ctrl_req_tx,
1913 serial->tx_data, serial->tx_data_count);
1914}
1915
1916/* write callback for Diag and CS port */
1917static void hso_std_serial_write_bulk_callback(struct urb *urb)
1918{
1919 struct hso_serial *serial = urb->context;
1920 int status = urb->status;
1921
1922 /* sanity check */
1923 if (!serial) {
1924 D1("serial == NULL");
1925 return;
1926 }
1927
1928 spin_lock(&serial->serial_lock);
1929 serial->tx_urb_used = 0;
1930 spin_unlock(&serial->serial_lock);
1931 if (status) {
68a351c5 1932 handle_usb_error(status, __func__, serial->parent);
72dc1c09
GKH		 1933 return;
1934 }
1935 hso_put_activity(serial->parent);
6aad04f2 1936 tty_port_tty_wakeup(&serial->port);
72dc1c09
GKH		 1937 hso_kick_transmit(serial);
1938
1939 D1(" ");
72dc1c09
GKH		 1940}
1941
1942/* called for writing diag or CS serial port */
1943static int hso_std_serial_write_data(struct hso_serial *serial)
1944{
1945 int count = serial->tx_data_count;
1946 int result;
1947
1948 usb_fill_bulk_urb(serial->tx_urb,
1949 serial->parent->usb,
1950 usb_sndbulkpipe(serial->parent->usb,
1951 serial->out_endp->
1952 bEndpointAddress & 0x7F),
1953 serial->tx_data, serial->tx_data_count,
1954 hso_std_serial_write_bulk_callback, serial);
1955
1956 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1957 if (result) {
1958 dev_warn(&serial->parent->usb->dev,
1959 "Failed to submit urb - res %d\n", result);
1960 return result;
1961 }
1962
1963 return count;
1964}
1965
1966/* callback after read or write on muxed serial port */
1967static void ctrl_callback(struct urb *urb)
1968{
1969 struct hso_serial *serial = urb->context;
1970 struct usb_ctrlrequest *req;
1971 int status = urb->status;
1972
1973 /* sanity check */
1974 if (!serial)
1975 return;
1976
1977 spin_lock(&serial->serial_lock);
1978 serial->tx_urb_used = 0;
1979 spin_unlock(&serial->serial_lock);
1980 if (status) {
68a351c5 1981 handle_usb_error(status, __func__, serial->parent);
72dc1c09
GKH		 1982 return;
1983 }
1984
1985 /* what request? */
1986 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1987 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
1988 D4("Actual length of urb = %d\n", urb->actual_length);
1989 DUMP1(urb->transfer_buffer, urb->actual_length);
1990
1991 if (req->bRequestType ==
1992 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
1993 /* response to a read command */
8ef5ba63
DJB		 1994 serial->rx_urb_filled[0] = 1;
1995 spin_lock(&serial->serial_lock);
1996 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1997 spin_unlock(&serial->serial_lock);
72dc1c09
GKH		 1998 } else {
1999 hso_put_activity(serial->parent);
6aad04f2 2000 tty_port_tty_wakeup(&serial->port);
72dc1c09
GKH		 2001 /* response to a write command */
2002 hso_kick_transmit(serial);
2003 }
2004}
2005
2006/* handle RX data for serial port */
8ef5ba63 2007static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
72dc1c09 2008{
e136e303 2009 struct tty_struct *tty;
8f9818af 2010 int count;
e136e303 2011
72dc1c09
GKH		 2012 /* Sanity check */
2013 if (urb == NULL || serial == NULL) {
2014 D1("serial = NULL");
8ef5ba63 2015 return -2;
72dc1c09
GKH		 2016 }
2017
9f8c0b08 2018 tty = tty_port_tty_get(&serial->port);
e136e303 2019
8f9818af
OS		 2020 if (tty && test_bit(TTY_THROTTLED, &tty->flags)) {
2021 tty_kref_put(tty);
2022 return -1;
2023 }
2024
72dc1c09 2025 /* Push data to tty */
2e124b4a 2026 D1("data to push to tty");
8f9818af
OS		 2027 count = tty_buffer_request_room(&serial->port, urb->actual_length);
2028 if (count >= urb->actual_length) {
2029 tty_insert_flip_string(&serial->port, urb->transfer_buffer,
2030 urb->actual_length);
2e124b4a 2031 tty_flip_buffer_push(&serial->port);
8f9818af
OS		 2032 } else {
2033 dev_warn(&serial->parent->usb->dev,
2034 "dropping data, %d bytes lost\n", urb->actual_length);
72dc1c09 2035 }
8f9818af 2036
2e124b4a
JS		 2037 tty_kref_put(tty);
2038
8f9818af
OS		 2039 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2040
2041 return 0;
72dc1c09
GKH		 2042}
2043
8ef5ba63 2044
72dc1c09
GKH		 2045/* Base driver functions */
2046
2047static void hso_log_port(struct hso_device *hso_dev)
2048{
2049 char *port_type;
2050 char port_dev[20];
2051
2052 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2053 case HSO_PORT_CONTROL:
2054 port_type = "Control";
2055 break;
2056 case HSO_PORT_APP:
2057 port_type = "Application";
2058 break;
2059 case HSO_PORT_GPS:
2060 port_type = "GPS";
2061 break;
2062 case HSO_PORT_GPS_CONTROL:
2063 port_type = "GPS control";
2064 break;
2065 case HSO_PORT_APP2:
2066 port_type = "Application2";
2067 break;
2068 case HSO_PORT_PCSC:
2069 port_type = "PCSC";
2070 break;
2071 case HSO_PORT_DIAG:
2072 port_type = "Diagnostic";
2073 break;
2074 case HSO_PORT_DIAG2:
2075 port_type = "Diagnostic2";
2076 break;
2077 case HSO_PORT_MODEM:
2078 port_type = "Modem";
2079 break;
2080 case HSO_PORT_NETWORK:
2081 port_type = "Network";
2082 break;
2083 default:
2084 port_type = "Unknown";
2085 break;
2086 }
2087 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2088 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2089 } else
2090 sprintf(port_dev, "/dev/%s%d", tty_filename,
2091 dev2ser(hso_dev)->minor);
2092
2093 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2094 port_type, port_dev);
2095}
2096
2097static int hso_start_net_device(struct hso_device *hso_dev)
2098{
2099 int i, result = 0;
2100 struct hso_net *hso_net = dev2net(hso_dev);
2101
2102 if (!hso_net)
2103 return -ENODEV;
2104
2105 /* send URBs for all read buffers */
2106 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2107
2108 /* Prep a receive URB */
2109 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2110 hso_dev->usb,
2111 usb_rcvbulkpipe(hso_dev->usb,
2112 hso_net->in_endp->
2113 bEndpointAddress & 0x7F),
2114 hso_net->mux_bulk_rx_buf_pool[i],
2115 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2116 hso_net);
2117
2118 /* Put it out there so the device can send us stuff */
2119 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2120 GFP_NOIO);
2121 if (result)
2122 dev_warn(&hso_dev->usb->dev,
2123 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2124 i, result);
2125 }
2126
2127 return result;
2128}
2129
2130static int hso_stop_net_device(struct hso_device *hso_dev)
2131{
2132 int i;
2133 struct hso_net *hso_net = dev2net(hso_dev);
2134
2135 if (!hso_net)
2136 return -ENODEV;
2137
2138 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2139 if (hso_net->mux_bulk_rx_urb_pool[i])
2140 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2141
2142 }
2143 if (hso_net->mux_bulk_tx_urb)
2144 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2145
2146 return 0;
2147}
2148
2149static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2150{
2151 int i, result = 0;
2152 struct hso_serial *serial = dev2ser(hso_dev);
2153
2154 if (!serial)
2155 return -ENODEV;
2156
2157 /* If it is not the MUX port fill in and submit a bulk urb (already
2158 * allocated in hso_serial_start) */
2159 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2160 for (i = 0; i < serial->num_rx_urbs; i++) {
2161 usb_fill_bulk_urb(serial->rx_urb[i],
2162 serial->parent->usb,
2163 usb_rcvbulkpipe(serial->parent->usb,
2164 serial->in_endp->
2165 bEndpointAddress &
2166 0x7F),
2167 serial->rx_data[i],
2168 serial->rx_data_length,
2169 hso_std_serial_read_bulk_callback,
2170 serial);
2171 result = usb_submit_urb(serial->rx_urb[i], flags);
2172 if (result) {
2173 dev_warn(&serial->parent->usb->dev,
2174 "Failed to submit urb - res %d\n",
2175 result);
2176 break;
2177 }
2178 }
2179 } else {
2180 mutex_lock(&serial->shared_int->shared_int_lock);
2181 if (!serial->shared_int->use_count) {
2182 result =
2183 hso_mux_submit_intr_urb(serial->shared_int,
2184 hso_dev->usb, flags);
2185 }
2186 serial->shared_int->use_count++;
2187 mutex_unlock(&serial->shared_int->shared_int_lock);
2188 }
542f5482
DJB		 2189 if (serial->tiocmget)
2190 tiocmget_submit_urb(serial,
2191 serial->tiocmget,
2192 serial->parent->usb);
72dc1c09
GKH		 2193 return result;
2194}
2195
2196static int hso_stop_serial_device(struct hso_device *hso_dev)
2197{
2198 int i;
2199 struct hso_serial *serial = dev2ser(hso_dev);
542f5482 2200 struct hso_tiocmget *tiocmget;
72dc1c09
GKH		 2201
2202 if (!serial)
2203 return -ENODEV;
2204
2205 for (i = 0; i < serial->num_rx_urbs; i++) {
8ef5ba63 2206 if (serial->rx_urb[i]) {
79927679
OS		 2207 usb_kill_urb(serial->rx_urb[i]);
2208 serial->rx_urb_filled[i] = 0;
8ef5ba63 2209 }
72dc1c09 2210 }
8ef5ba63 2211 serial->curr_rx_urb_idx = 0;
72dc1c09
GKH		 2212
2213 if (serial->tx_urb)
2214 usb_kill_urb(serial->tx_urb);
2215
2216 if (serial->shared_int) {
2217 mutex_lock(&serial->shared_int->shared_int_lock);
2218 if (serial->shared_int->use_count &&
2219 (--serial->shared_int->use_count == 0)) {
2220 struct urb *urb;
2221
2222 urb = serial->shared_int->shared_intr_urb;
2223 if (urb)
2224 usb_kill_urb(urb);
2225 }
2226 mutex_unlock(&serial->shared_int->shared_int_lock);
2227 }
542f5482
DJB		 2228 tiocmget = serial->tiocmget;
2229 if (tiocmget) {
2230 wake_up_interruptible(&tiocmget->waitq);
2231 usb_kill_urb(tiocmget->urb);
2232 }
72dc1c09
GKH		 2233
2234 return 0;
2235}
2236
69b377b3 2237static void hso_serial_tty_unregister(struct hso_serial *serial)
72dc1c09 2238{
72dc1c09
GKH		 2239 if (serial->parent->dev)
2240 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2241
2242 tty_unregister_device(tty_drv, serial->minor);
69b377b3
OS		 2243}
2244
2245static void hso_serial_common_free(struct hso_serial *serial)
2246{
2247 int i;
72dc1c09
GKH		 2248
2249 for (i = 0; i < serial->num_rx_urbs; i++) {
2250 /* unlink and free RX URB */
2251 usb_free_urb(serial->rx_urb[i]);
2252 /* free the RX buffer */
2253 kfree(serial->rx_data[i]);
2254 }
2255
2256 /* unlink and free TX URB */
2257 usb_free_urb(serial->tx_urb);
295fc56f 2258 kfree(serial->tx_buffer);
72dc1c09 2259 kfree(serial->tx_data);
191c5f10 2260 tty_port_destroy(&serial->port);
72dc1c09
GKH		 2261}
2262
2263static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2264 int rx_size, int tx_size)
2265{
2266 struct device *dev;
2267 int minor;
2268 int i;
2269
191c5f10
JS		 2270 tty_port_init(&serial->port);
2271
72dc1c09
GKH		 2272 minor = get_free_serial_index();
2273 if (minor < 0)
2274 goto exit;
2275
2276 /* register our minor number */
734cc178
JS		 2277 serial->parent->dev = tty_port_register_device(&serial->port, tty_drv,
2278 minor, &serial->parent->interface->dev);
72dc1c09 2279 dev = serial->parent->dev;
1aec5bdf 2280 dev_set_drvdata(dev, serial->parent);
72dc1c09
GKH		 2281 i = device_create_file(dev, &dev_attr_hsotype);
2282
2283 /* fill in specific data for later use */
2284 serial->minor = minor;
2285 serial->magic = HSO_SERIAL_MAGIC;
2286 spin_lock_init(&serial->serial_lock);
2287 serial->num_rx_urbs = num_urbs;
2288
2289 /* RX, allocate urb and initialize */
2290
2291 /* prepare our RX buffer */
2292 serial->rx_data_length = rx_size;
2293 for (i = 0; i < serial->num_rx_urbs; i++) {
2294 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2295 if (!serial->rx_urb[i]) {
2296 dev_err(dev, "Could not allocate urb?\n");
2297 goto exit;
2298 }
2299 serial->rx_urb[i]->transfer_buffer = NULL;
2300 serial->rx_urb[i]->transfer_buffer_length = 0;
2301 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2302 GFP_KERNEL);
38673c82 2303 if (!serial->rx_data[i])
72dc1c09 2304 goto exit;
72dc1c09
GKH		 2305 }
2306
2307 /* TX, allocate urb and initialize */
2308 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2309 if (!serial->tx_urb) {
2310 dev_err(dev, "Could not allocate urb?\n");
2311 goto exit;
2312 }
2313 serial->tx_urb->transfer_buffer = NULL;
2314 serial->tx_urb->transfer_buffer_length = 0;
2315 /* prepare our TX buffer */
2316 serial->tx_data_count = 0;
2317 serial->tx_buffer_count = 0;
2318 serial->tx_data_length = tx_size;
2319 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
38673c82 2320 if (!serial->tx_data)
72dc1c09 2321 goto exit;
38673c82 2322
72dc1c09 2323 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
38673c82 2324 if (!serial->tx_buffer)
72dc1c09 2325 goto exit;
72dc1c09
GKH		 2326
2327 return 0;
2328exit:
69b377b3 2329 hso_serial_tty_unregister(serial);
72dc1c09
GKH		 2330 hso_serial_common_free(serial);
2331 return -1;
2332}
2333
72dc1c09
GKH		 2334/* Creates a general hso device */
2335static struct hso_device *hso_create_device(struct usb_interface *intf,
2336 int port_spec)
2337{
2338 struct hso_device *hso_dev;
2339
2340 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2341 if (!hso_dev)
2342 return NULL;
2343
2344 hso_dev->port_spec = port_spec;
2345 hso_dev->usb = interface_to_usbdev(intf);
2346 hso_dev->interface = intf;
2347 kref_init(&hso_dev->ref);
ab153d84
DM		 2348 mutex_init(&hso_dev->mutex);
2349
72dc1c09
GKH		 2350 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2351 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2352
2353 return hso_dev;
2354}
2355
2356/* Removes a network device in the network device table */
2357static int remove_net_device(struct hso_device *hso_dev)
2358{
2359 int i;
2360
2361 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2362 if (network_table[i] == hso_dev) {
2363 network_table[i] = NULL;
2364 break;
2365 }
2366 }
2367 if (i == HSO_MAX_NET_DEVICES)
2368 return -1;
2369 return 0;
2370}
2371
2372/* Frees our network device */
2373static void hso_free_net_device(struct hso_device *hso_dev)
2374{
2375 int i;
2376 struct hso_net *hso_net = dev2net(hso_dev);
2377
2378 if (!hso_net)
2379 return;
2380
3b7d2b31
JD		 2381 remove_net_device(hso_net->parent);
2382
5e2cd082 2383 if (hso_net->net)
3b7d2b31 2384 unregister_netdev(hso_net->net);
3b7d2b31 2385
72dc1c09
GKH		 2386 /* start freeing */
2387 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2388 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2389 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
3b7d2b31 2390 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
72dc1c09
GKH		 2391 }
2392 usb_free_urb(hso_net->mux_bulk_tx_urb);
2393 kfree(hso_net->mux_bulk_tx_buf);
3b7d2b31 2394 hso_net->mux_bulk_tx_buf = NULL;
ab153d84 2395
5e2cd082
GK		 2396 if (hso_net->net)
2397 free_netdev(hso_net->net);
2398
e44578ea 2399 kfree(hso_dev);
72dc1c09
GKH		 2400}
2401
c266cb4e
SH		 2402static const struct net_device_ops hso_netdev_ops = {
2403 .ndo_open = hso_net_open,
2404 .ndo_stop = hso_net_close,
2405 .ndo_start_xmit = hso_net_start_xmit,
2406 .ndo_tx_timeout = hso_net_tx_timeout,
2407};
2408
72dc1c09
GKH		 2409/* initialize the network interface */
2410static void hso_net_init(struct net_device *net)
2411{
2412 struct hso_net *hso_net = netdev_priv(net);
2413
2414 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2415
2416 /* fill in the other fields */
c266cb4e 2417 net->netdev_ops = &hso_netdev_ops;
72dc1c09
GKH		 2418 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2419 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2420 net->type = ARPHRD_NONE;
2421 net->mtu = DEFAULT_MTU - 14;
2422 net->tx_queue_len = 10;
7ad24ea4 2423 net->ethtool_ops = &ops;
72dc1c09
GKH		 2424
2425 /* and initialize the semaphore */
2426 spin_lock_init(&hso_net->net_lock);
2427}
2428
2429/* Adds a network device in the network device table */
2430static int add_net_device(struct hso_device *hso_dev)
2431{
2432 int i;
2433
2434 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2435 if (network_table[i] == NULL) {
2436 network_table[i] = hso_dev;
2437 break;
2438 }
2439 }
2440 if (i == HSO_MAX_NET_DEVICES)
2441 return -1;
2442 return 0;
2443}
2444
19d337df 2445static int hso_rfkill_set_block(void *data, bool blocked)
72dc1c09
GKH		 2446{
2447 struct hso_device *hso_dev = data;
19d337df 2448 int enabled = !blocked;
72dc1c09
GKH		 2449 int rv;
2450
ab153d84 2451 mutex_lock(&hso_dev->mutex);
72dc1c09
GKH		 2452 if (hso_dev->usb_gone)
2453 rv = 0;
2454 else
2455 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2456 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2457 USB_CTRL_SET_TIMEOUT);
ab153d84 2458 mutex_unlock(&hso_dev->mutex);
72dc1c09
GKH		 2459 return rv;
2460}
2461
19d337df
JB		 2462static const struct rfkill_ops hso_rfkill_ops = {
2463 .set_block = hso_rfkill_set_block,
2464};
2465
72dc1c09
GKH		 2466/* Creates and sets up everything for rfkill */
2467static void hso_create_rfkill(struct hso_device *hso_dev,
2468 struct usb_interface *interface)
2469{
2470 struct hso_net *hso_net = dev2net(hso_dev);
939a9516 2471 struct device *dev = &hso_net->net->dev;
72dc1c09 2472
2e6d01ff 2473 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d",
72dc1c09 2474 interface->altsetting->desc.bInterfaceNumber);
19d337df 2475
2e6d01ff 2476 hso_net->rfkill = rfkill_alloc(hso_net->name,
19d337df
JB		 2477 &interface_to_usbdev(interface)->dev,
2478 RFKILL_TYPE_WWAN,
2479 &hso_rfkill_ops, hso_dev);
2480 if (!hso_net->rfkill) {
2481 dev_err(dev, "%s - Out of memory\n", __func__);
19d337df
JB		 2482 return;
2483 }
72dc1c09 2484 if (rfkill_register(hso_net->rfkill) < 0) {
19d337df 2485 rfkill_destroy(hso_net->rfkill);
939a9516
JM		 2486 hso_net->rfkill = NULL;
2487 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
72dc1c09
GKH		 2488 return;
2489 }
2490}
2491
384912ed
MH		 2492static struct device_type hso_type = {
2493 .name = "wwan",
2494};
2495
72dc1c09 2496/* Creates our network device */
0de8ca59
JD		 2497static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2498 int port_spec)
72dc1c09
GKH		 2499{
2500 int result, i;
2501 struct net_device *net;
2502 struct hso_net *hso_net;
2503 struct hso_device *hso_dev;
2504
0de8ca59 2505 hso_dev = hso_create_device(interface, port_spec);
72dc1c09
GKH		 2506 if (!hso_dev)
2507 return NULL;
2508
2509 /* allocate our network device, then we can put in our private data */
2510 /* call hso_net_init to do the basic initialization */
c835a677
TG		 2511 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN,
2512 hso_net_init);
72dc1c09
GKH		 2513 if (!net) {
2514 dev_err(&interface->dev, "Unable to create ethernet device\n");
2515 goto exit;
2516 }
2517
2518 hso_net = netdev_priv(net);
2519
2520 hso_dev->port_data.dev_net = hso_net;
2521 hso_net->net = net;
2522 hso_net->parent = hso_dev;
2523
2524 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2525 USB_DIR_IN);
2526 if (!hso_net->in_endp) {
2527 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2528 goto exit;
2529 }
2530 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2531 USB_DIR_OUT);
2532 if (!hso_net->out_endp) {
2533 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2534 goto exit;
2535 }
2536 SET_NETDEV_DEV(net, &interface->dev);
384912ed 2537 SET_NETDEV_DEVTYPE(net, &hso_type);
72dc1c09
GKH		 2538
2539 /* registering our net device */
2540 result = register_netdev(net);
2541 if (result) {
2542 dev_err(&interface->dev, "Failed to register device\n");
2543 goto exit;
2544 }
2545
2546 /* start allocating */
2547 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2548 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2549 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2550 dev_err(&interface->dev, "Could not allocate rx urb\n");
2551 goto exit;
2552 }
2553 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2554 GFP_KERNEL);
38673c82 2555 if (!hso_net->mux_bulk_rx_buf_pool[i])
72dc1c09 2556 goto exit;
72dc1c09
GKH		 2557 }
2558 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2559 if (!hso_net->mux_bulk_tx_urb) {
2560 dev_err(&interface->dev, "Could not allocate tx urb\n");
2561 goto exit;
2562 }
2563 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
38673c82 2564 if (!hso_net->mux_bulk_tx_buf)
72dc1c09 2565 goto exit;
72dc1c09
GKH		 2566
2567 add_net_device(hso_dev);
2568
2569 hso_log_port(hso_dev);
2570
2571 hso_create_rfkill(hso_dev, interface);
2572
2573 return hso_dev;
2574exit:
2575 hso_free_net_device(hso_dev);
2576 return NULL;
2577}
2578
542f5482
DJB		 2579static void hso_free_tiomget(struct hso_serial *serial)
2580{
5b89db0e
JJ		 2581 struct hso_tiocmget *tiocmget;
2582 if (!serial)
2583 return;
2584 tiocmget = serial->tiocmget;
542f5482 2585 if (tiocmget) {
5b89db0e
JJ		 2586 usb_free_urb(tiocmget->urb);
2587 tiocmget->urb = NULL;
542f5482 2588 serial->tiocmget = NULL;
3b7d2b31 2589 kfree(tiocmget);
542f5482
DJB		 2590 }
2591}
2592
72dc1c09
GKH		 2593/* Frees an AT channel ( goes for both mux and non-mux ) */
2594static void hso_free_serial_device(struct hso_device *hso_dev)
2595{
2596 struct hso_serial *serial = dev2ser(hso_dev);
2597
2598 if (!serial)
2599 return;
72dc1c09
GKH		 2600
2601 hso_serial_common_free(serial);
2602
2603 if (serial->shared_int) {
2604 mutex_lock(&serial->shared_int->shared_int_lock);
2605 if (--serial->shared_int->ref_count == 0)
2606 hso_free_shared_int(serial->shared_int);
2607 else
2608 mutex_unlock(&serial->shared_int->shared_int_lock);
2609 }
542f5482 2610 hso_free_tiomget(serial);
72dc1c09 2611 kfree(serial);
e44578ea 2612 kfree(hso_dev);
72dc1c09
GKH		 2613}
2614
2615/* Creates a bulk AT channel */
2616static struct hso_device *hso_create_bulk_serial_device(
2617 struct usb_interface *interface, int port)
2618{
2619 struct hso_device *hso_dev;
2620 struct hso_serial *serial;
2621 int num_urbs;
542f5482 2622 struct hso_tiocmget *tiocmget;
72dc1c09
GKH		 2623
2624 hso_dev = hso_create_device(interface, port);
2625 if (!hso_dev)
2626 return NULL;
2627
2628 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2629 if (!serial)
2630 goto exit;
2631
2632 serial->parent = hso_dev;
2633 hso_dev->port_data.dev_serial = serial;
2634
58eb17f1 2635 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
72dc1c09 2636 num_urbs = 2;
542f5482
DJB		 2637 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2638 GFP_KERNEL);
2639 /* it isn't going to break our heart if serial->tiocmget
2640 * allocation fails don't bother checking this.
2641 */
2642 if (serial->tiocmget) {
2643 tiocmget = serial->tiocmget;
2644 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2645 if (tiocmget->urb) {
2646 mutex_init(&tiocmget->mutex);
2647 init_waitqueue_head(&tiocmget->waitq);
2648 tiocmget->endp = hso_get_ep(
2649 interface,
2650 USB_ENDPOINT_XFER_INT,
2651 USB_DIR_IN);
2652 } else
2653 hso_free_tiomget(serial);
2654 }
2655 }
72dc1c09
GKH		 2656 else
2657 num_urbs = 1;
2658
2659 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2660 BULK_URB_TX_SIZE))
2661 goto exit;
2662
2663 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2664 USB_DIR_IN);
2665 if (!serial->in_endp) {
2666 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
e57b641d 2667 goto exit2;
72dc1c09
GKH		 2668 }
2669
2670 if (!
2671 (serial->out_endp =
2672 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2673 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
e57b641d 2674 goto exit2;
72dc1c09
GKH		 2675 }
2676
2677 serial->write_data = hso_std_serial_write_data;
2678
2679 /* and record this serial */
2680 set_serial_by_index(serial->minor, serial);
2681
2682 /* setup the proc dirs and files if needed */
2683 hso_log_port(hso_dev);
2684
2685 /* done, return it */
2686 return hso_dev;
e57b641d
AB		 2687
2688exit2:
69b377b3 2689 hso_serial_tty_unregister(serial);
e57b641d 2690 hso_serial_common_free(serial);
72dc1c09 2691exit:
542f5482 2692 hso_free_tiomget(serial);
72dc1c09 2693 kfree(serial);
e44578ea 2694 kfree(hso_dev);
72dc1c09
GKH		 2695 return NULL;
2696}
2697
2698/* Creates a multiplexed AT channel */
2699static
2700struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2701 int port,
2702 struct hso_shared_int *mux)
2703{
2704 struct hso_device *hso_dev;
2705 struct hso_serial *serial;
2706 int port_spec;
2707
2708 port_spec = HSO_INTF_MUX;
2709 port_spec &= ~HSO_PORT_MASK;
2710
2711 port_spec |= hso_mux_to_port(port);
2712 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2713 return NULL;
2714
2715 hso_dev = hso_create_device(interface, port_spec);
2716 if (!hso_dev)
2717 return NULL;
2718
2719 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2720 if (!serial)
2721 goto exit;
2722
2723 hso_dev->port_data.dev_serial = serial;
2724 serial->parent = hso_dev;
2725
2726 if (hso_serial_common_create
2727 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2728 goto exit;
2729
2730 serial->tx_data_length--;
2731 serial->write_data = hso_mux_serial_write_data;
2732
2733 serial->shared_int = mux;
2734 mutex_lock(&serial->shared_int->shared_int_lock);
2735 serial->shared_int->ref_count++;
2736 mutex_unlock(&serial->shared_int->shared_int_lock);
2737
2738 /* and record this serial */
2739 set_serial_by_index(serial->minor, serial);
2740
2741 /* setup the proc dirs and files if needed */
2742 hso_log_port(hso_dev);
2743
2744 /* done, return it */
2745 return hso_dev;
2746
2747exit:
2748 if (serial) {
2749 tty_unregister_device(tty_drv, serial->minor);
2750 kfree(serial);
2751 }
91ecee68 2752 kfree(hso_dev);
72dc1c09
GKH		 2753 return NULL;
2754
2755}
2756
2757static void hso_free_shared_int(struct hso_shared_int *mux)
2758{
2759 usb_free_urb(mux->shared_intr_urb);
2760 kfree(mux->shared_intr_buf);
2761 mutex_unlock(&mux->shared_int_lock);
2762 kfree(mux);
2763}
2764
2765static
2766struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2767{
2768 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2769
2770 if (!mux)
2771 return NULL;
2772
2773 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2774 USB_DIR_IN);
2775 if (!mux->intr_endp) {
2776 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2777 goto exit;
2778 }
2779
2780 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2781 if (!mux->shared_intr_urb) {
8a5c9c49 2782 dev_err(&interface->dev, "Could not allocate intr urb?\n");
72dc1c09
GKH		 2783 goto exit;
2784 }
d9ced80d
JD		 2785 mux->shared_intr_buf =
2786 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2787 GFP_KERNEL);
38673c82 2788 if (!mux->shared_intr_buf)
72dc1c09 2789 goto exit;
72dc1c09
GKH		 2790
2791 mutex_init(&mux->shared_int_lock);
2792
2793 return mux;
2794
2795exit:
2796 kfree(mux->shared_intr_buf);
2797 usb_free_urb(mux->shared_intr_urb);
2798 kfree(mux);
2799 return NULL;
2800}
2801
2802/* Gets the port spec for a certain interface */
2803static int hso_get_config_data(struct usb_interface *interface)
2804{
2805 struct usb_device *usbdev = interface_to_usbdev(interface);
e75dc677 2806 u8 *config_data = kmalloc(17, GFP_KERNEL);
72dc1c09
GKH		 2807 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2808 s32 result;
2809
e75dc677
DG		 2810 if (!config_data)
2811 return -ENOMEM;
72dc1c09
GKH		 2812 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2813 0x86, 0xC0, 0, 0, config_data, 17,
2814 USB_CTRL_SET_TIMEOUT) != 0x11) {
e75dc677 2815 kfree(config_data);
72dc1c09
GKH		 2816 return -EIO;
2817 }
2818
2819 switch (config_data[if_num]) {
2820 case 0x0:
2821 result = 0;
2822 break;
2823 case 0x1:
2824 result = HSO_PORT_DIAG;
2825 break;
2826 case 0x2:
2827 result = HSO_PORT_GPS;
2828 break;
2829 case 0x3:
2830 result = HSO_PORT_GPS_CONTROL;
2831 break;
2832 case 0x4:
2833 result = HSO_PORT_APP;
2834 break;
2835 case 0x5:
2836 result = HSO_PORT_APP2;
2837 break;
2838 case 0x6:
2839 result = HSO_PORT_CONTROL;
2840 break;
2841 case 0x7:
2842 result = HSO_PORT_NETWORK;
2843 break;
2844 case 0x8:
2845 result = HSO_PORT_MODEM;
2846 break;
2847 case 0x9:
2848 result = HSO_PORT_MSD;
2849 break;
2850 case 0xa:
2851 result = HSO_PORT_PCSC;
2852 break;
2853 case 0xb:
2854 result = HSO_PORT_VOICE;
2855 break;
2856 default:
2857 result = 0;
2858 }
2859
2860 if (result)
2861 result |= HSO_INTF_BULK;
2862
2863 if (config_data[16] & 0x1)
2864 result |= HSO_INFO_CRC_BUG;
2865
e75dc677 2866 kfree(config_data);
72dc1c09
GKH		 2867 return result;
2868}
2869
2870/* called once for each interface upon device insertion */
2871static int hso_probe(struct usb_interface *interface,
2872 const struct usb_device_id *id)
2873{
2874 int mux, i, if_num, port_spec;
2875 unsigned char port_mask;
2876 struct hso_device *hso_dev = NULL;
2877 struct hso_shared_int *shared_int;
2878 struct hso_device *tmp_dev = NULL;
2879
35e57e1b
DG		 2880 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2881 dev_err(&interface->dev, "Not our interface\n");
2882 return -ENODEV;
2883 }
2884
72dc1c09
GKH		 2885 if_num = interface->altsetting->desc.bInterfaceNumber;
2886
2887 /* Get the interface/port specification from either driver_info or from
2888 * the device itself */
2889 if (id->driver_info)
2890 port_spec = ((u32 *)(id->driver_info))[if_num];
2891 else
2892 port_spec = hso_get_config_data(interface);
2893
72dc1c09
GKH		 2894 /* Check if we need to switch to alt interfaces prior to port
2895 * configuration */
2896 if (interface->num_altsetting > 1)
2897 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2898 interface->needs_remote_wakeup = 1;
2899
2900 /* Allocate new hso device(s) */
2901 switch (port_spec & HSO_INTF_MASK) {
2902 case HSO_INTF_MUX:
2903 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2904 /* Create the network device */
2905 if (!disable_net) {
0de8ca59
JD		 2906 hso_dev = hso_create_net_device(interface,
2907 port_spec);
72dc1c09
GKH		 2908 if (!hso_dev)
2909 goto exit;
2910 tmp_dev = hso_dev;
2911 }
2912 }
2913
2914 if (hso_get_mux_ports(interface, &port_mask))
2915 /* TODO: de-allocate everything */
2916 goto exit;
2917
2918 shared_int = hso_create_shared_int(interface);
2919 if (!shared_int)
2920 goto exit;
2921
2922 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2923 if (port_mask & i) {
2924 hso_dev = hso_create_mux_serial_device(
2925 interface, i, shared_int);
2926 if (!hso_dev)
2927 goto exit;
2928 }
2929 }
2930
2931 if (tmp_dev)
2932 hso_dev = tmp_dev;
2933 break;
2934
2935 case HSO_INTF_BULK:
2936 /* It's a regular bulk interface */
8e65c0ec
FA		 2937 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2938 if (!disable_net)
2939 hso_dev =
2940 hso_create_net_device(interface, port_spec);
2941 } else {
72dc1c09
GKH		 2942 hso_dev =
2943 hso_create_bulk_serial_device(interface, port_spec);
8e65c0ec 2944 }
72dc1c09
GKH		 2945 if (!hso_dev)
2946 goto exit;
2947 break;
2948 default:
2949 goto exit;
2950 }
2951
72dc1c09
GKH		 2952 /* save our data pointer in this device */
2953 usb_set_intfdata(interface, hso_dev);
2954
2955 /* done */
2956 return 0;
2957exit:
2958 hso_free_interface(interface);
2959 return -ENODEV;
2960}
2961
2962/* device removed, cleaning up */
2963static void hso_disconnect(struct usb_interface *interface)
2964{
2965 hso_free_interface(interface);
2966
2967 /* remove reference of our private data */
2968 usb_set_intfdata(interface, NULL);
72dc1c09
GKH		 2969}
2970
2971static void async_get_intf(struct work_struct *data)
2972{
2973 struct hso_device *hso_dev =
2974 container_of(data, struct hso_device, async_get_intf);
2975 usb_autopm_get_interface(hso_dev->interface);
2976}
2977
2978static void async_put_intf(struct work_struct *data)
2979{
2980 struct hso_device *hso_dev =
2981 container_of(data, struct hso_device, async_put_intf);
2982 usb_autopm_put_interface(hso_dev->interface);
2983}
2984
2985static int hso_get_activity(struct hso_device *hso_dev)
2986{
2987 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2988 if (!hso_dev->is_active) {
2989 hso_dev->is_active = 1;
2990 schedule_work(&hso_dev->async_get_intf);
2991 }
2992 }
2993
2994 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
2995 return -EAGAIN;
2996
2997 usb_mark_last_busy(hso_dev->usb);
2998
2999 return 0;
3000}
3001
3002static int hso_put_activity(struct hso_device *hso_dev)
3003{
3004 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3005 if (hso_dev->is_active) {
3006 hso_dev->is_active = 0;
3007 schedule_work(&hso_dev->async_put_intf);
3008 return -EAGAIN;
3009 }
3010 }
3011 hso_dev->is_active = 0;
3012 return 0;
3013}
3014
3015/* called by kernel when we need to suspend device */
3016static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3017{
3018 int i, result;
3019
3020 /* Stop all serial ports */
3021 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3022 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3023 result = hso_stop_serial_device(serial_table[i]);
3024 if (result)
3025 goto out;
3026 }
3027 }
3028
3029 /* Stop all network ports */
3030 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3031 if (network_table[i] &&
3032 (network_table[i]->interface == iface)) {
3033 result = hso_stop_net_device(network_table[i]);
3034 if (result)
3035 goto out;
3036 }
3037 }
3038
3039out:
3040 return 0;
3041}
3042
3043/* called by kernel when we need to resume device */
3044static int hso_resume(struct usb_interface *iface)
3045{
3046 int i, result = 0;
3047 struct hso_net *hso_net;
3048
3049 /* Start all serial ports */
3050 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3051 if (serial_table[i] && (serial_table[i]->interface == iface)) {
5ce76e77 3052 if (dev2ser(serial_table[i])->port.count) {
72dc1c09
GKH		 3053 result =
3054 hso_start_serial_device(serial_table[i], GFP_NOIO);
3055 hso_kick_transmit(dev2ser(serial_table[i]));
3056 if (result)
3057 goto out;
3058 }
3059 }
3060 }
3061
3062 /* Start all network ports */
3063 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3064 if (network_table[i] &&
3065 (network_table[i]->interface == iface)) {
3066 hso_net = dev2net(network_table[i]);
89930b7b
DJB		 3067 if (hso_net->flags & IFF_UP) {
3068 /* First transmit any lingering data,
3069 then restart the device. */
3070 if (hso_net->skb_tx_buf) {
3071 dev_dbg(&iface->dev,
3072 "Transmitting"
3073 " lingering data\n");
3074 hso_net_start_xmit(hso_net->skb_tx_buf,
3075 hso_net->net);
3076 hso_net->skb_tx_buf = NULL;
3077 }
3078 result = hso_start_net_device(network_table[i]);
3079 if (result)
3080 goto out;
72dc1c09 3081 }
72dc1c09
GKH		 3082 }
3083 }
3084
3085out:
3086 return result;
3087}
3088
3089static void hso_serial_ref_free(struct kref *ref)
3090{
3091 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3092
3093 hso_free_serial_device(hso_dev);
3094}
3095
3096static void hso_free_interface(struct usb_interface *interface)
3097{
f6516b69 3098 struct hso_serial *serial;
72dc1c09
GKH		 3099 int i;
3100
3101 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
8e95a202
JP		 3102 if (serial_table[i] &&
3103 (serial_table[i]->interface == interface)) {
f6516b69
OS		 3104 serial = dev2ser(serial_table[i]);
3105 tty_port_tty_hangup(&serial->port, false);
3106 mutex_lock(&serial->parent->mutex);
3107 serial->parent->usb_gone = 1;
3108 mutex_unlock(&serial->parent->mutex);
cc491970
OS		 3109 cancel_work_sync(&serial_table[i]->async_put_intf);
3110 cancel_work_sync(&serial_table[i]->async_get_intf);
69b377b3 3111 hso_serial_tty_unregister(serial);
ab153d84 3112 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
301d3b7e 3113 set_serial_by_index(i, NULL);
72dc1c09
GKH		 3114 }
3115 }
3116
3117 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
8e95a202
JP		 3118 if (network_table[i] &&
3119 (network_table[i]->interface == interface)) {
72dc1c09
GKH		 3120 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3121 /* hso_stop_net_device doesn't stop the net queue since
3122 * traffic needs to start it again when suspended */
3123 netif_stop_queue(dev2net(network_table[i])->net);
3124 hso_stop_net_device(network_table[i]);
3125 cancel_work_sync(&network_table[i]->async_put_intf);
3126 cancel_work_sync(&network_table[i]->async_get_intf);
19d337df 3127 if (rfk) {
72dc1c09 3128 rfkill_unregister(rfk);
19d337df
JB		 3129 rfkill_destroy(rfk);
3130 }
72dc1c09
GKH		 3131 hso_free_net_device(network_table[i]);
3132 }
3133 }
3134}
3135
3136/* Helper functions */
3137
3138/* Get the endpoint ! */
3139static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3140 int type, int dir)
3141{
3142 int i;
3143 struct usb_host_interface *iface = intf->cur_altsetting;
3144 struct usb_endpoint_descriptor *endp;
3145
3146 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3147 endp = &iface->endpoint[i].desc;
3148 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
f201a8a4 3149 (usb_endpoint_type(endp) == type))
72dc1c09
GKH		 3150 return endp;
3151 }
3152
3153 return NULL;
3154}
3155
3156/* Get the byte that describes which ports are enabled */
3157static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3158{
3159 int i;
3160 struct usb_host_interface *iface = intf->cur_altsetting;
3161
3162 if (iface->extralen == 3) {
3163 *ports = iface->extra[2];
3164 return 0;
3165 }
3166
3167 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3168 if (iface->endpoint[i].extralen == 3) {
3169 *ports = iface->endpoint[i].extra[2];
3170 return 0;
3171 }
3172 }
3173
3174 return -1;
3175}
3176
3177/* interrupt urb needs to be submitted, used for serial read of muxed port */
3178static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3179 struct usb_device *usb, gfp_t gfp)
3180{
3181 int result;
3182
3183 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3184 usb_rcvintpipe(usb,
3185 shared_int->intr_endp->bEndpointAddress & 0x7F),
3186 shared_int->shared_intr_buf,
d9ced80d 3187 1,
72dc1c09
GKH		 3188 intr_callback, shared_int,
3189 shared_int->intr_endp->bInterval);
3190
3191 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3192 if (result)
8a5c9c49 3193 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
72dc1c09
GKH		 3194 result);
3195
3196 return result;
3197}
3198
3199/* operations setup of the serial interface */
6c59f569 3200static const struct tty_operations hso_serial_ops = {
72dc1c09
GKH		 3201 .open = hso_serial_open,
3202 .close = hso_serial_close,
3203 .write = hso_serial_write,
3204 .write_room = hso_serial_write_room,
29bd3bc1 3205 .cleanup = hso_serial_cleanup,
542f5482 3206 .ioctl = hso_serial_ioctl,
72dc1c09
GKH		 3207 .set_termios = hso_serial_set_termios,
3208 .chars_in_buffer = hso_serial_chars_in_buffer,
3209 .tiocmget = hso_serial_tiocmget,
3210 .tiocmset = hso_serial_tiocmset,
0bca1b91 3211 .get_icount = hso_get_count,
8ef5ba63 3212 .unthrottle = hso_unthrottle
72dc1c09
GKH		 3213};
3214
3215static struct usb_driver hso_driver = {
3216 .name = driver_name,
3217 .probe = hso_probe,
3218 .disconnect = hso_disconnect,
3219 .id_table = hso_ids,
3220 .suspend = hso_suspend,
3221 .resume = hso_resume,
9c8f92ae 3222 .reset_resume = hso_resume,
72dc1c09 3223 .supports_autosuspend = 1,
e1f12eb6 3224 .disable_hub_initiated_lpm = 1,
72dc1c09
GKH		 3225};
3226
3227static int __init hso_init(void)
3228{
3229 int i;
3230 int result;
3231
3232 /* put it in the log */
3233 printk(KERN_INFO "hso: %s\n", version);
3234
3235 /* Initialise the serial table semaphore and table */
3236 spin_lock_init(&serial_table_lock);
3237 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3238 serial_table[i] = NULL;
3239
3240 /* allocate our driver using the proper amount of supported minors */
3241 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3242 if (!tty_drv)
3243 return -ENOMEM;
3244
3245 /* fill in all needed values */
72dc1c09
GKH		 3246 tty_drv->driver_name = driver_name;
3247 tty_drv->name = tty_filename;
3248
3249 /* if major number is provided as parameter, use that one */
3250 if (tty_major)
3251 tty_drv->major = tty_major;
3252
3253 tty_drv->minor_start = 0;
72dc1c09
GKH		 3254 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3255 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3256 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3257 tty_drv->init_termios = tty_std_termios;
ac9720c3 3258 hso_init_termios(&tty_drv->init_termios);
72dc1c09
GKH		 3259 tty_set_operations(tty_drv, &hso_serial_ops);
3260
3261 /* register the tty driver */
3262 result = tty_register_driver(tty_drv);
3263 if (result) {
3264 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3265 __func__, result);
d230788f 3266 goto err_free_tty;
72dc1c09
GKH		 3267 }
3268
3269 /* register this module as an usb driver */
3270 result = usb_register(&hso_driver);
3271 if (result) {
3272 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3273 result);
d230788f 3274 goto err_unreg_tty;
72dc1c09
GKH		 3275 }
3276
3277 /* done */
3278 return 0;
d230788f
JS		 3279err_unreg_tty:
3280 tty_unregister_driver(tty_drv);
3281err_free_tty:
3282 put_tty_driver(tty_drv);
3283 return result;
72dc1c09
GKH		 3284}
3285
3286static void __exit hso_exit(void)
3287{
3288 printk(KERN_INFO "hso: unloaded\n");
3289
3290 tty_unregister_driver(tty_drv);
d230788f 3291 put_tty_driver(tty_drv);
72dc1c09
GKH		 3292 /* deregister the usb driver */
3293 usb_deregister(&hso_driver);
3294}
3295
3296/* Module definitions */
3297module_init(hso_init);
3298module_exit(hso_exit);
3299
3300MODULE_AUTHOR(MOD_AUTHOR);
3301MODULE_DESCRIPTION(MOD_DESCRIPTION);
3302MODULE_LICENSE(MOD_LICENSE);
72dc1c09
GKH		 3303
3304/* change the debug level (eg: insmod hso.ko debug=0x04) */
3305MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3306module_param(debug, int, S_IRUGO | S_IWUSR);
3307
3308/* set the major tty number (eg: insmod hso.ko tty_major=245) */
3309MODULE_PARM_DESC(tty_major, "Set the major tty number");
3310module_param(tty_major, int, S_IRUGO | S_IWUSR);
3311
3312/* disable network interface (eg: insmod hso.ko disable_net=1) */
3313MODULE_PARM_DESC(disable_net, "Disable the network interface");
3314module_param(disable_net, int, S_IRUGO | S_IWUSR);
Linux kernel - Deliverables
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