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hso: fix small indentation error
[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;
68a351c5 277 struct work_struct reset_device;
72dc1c09
GKH		 278
279 struct usb_device *usb;
280 struct usb_interface *interface;
281
282 struct device *dev;
283 struct kref ref;
ab153d84 284 struct mutex mutex;
72dc1c09
GKH		 285};
286
287/* Type of interface */
288#define HSO_INTF_MASK 0xFF00
289#define HSO_INTF_MUX 0x0100
290#define HSO_INTF_BULK 0x0200
291
292/* Type of port */
293#define HSO_PORT_MASK 0xFF
294#define HSO_PORT_NO_PORT 0x0
295#define HSO_PORT_CONTROL 0x1
296#define HSO_PORT_APP 0x2
297#define HSO_PORT_GPS 0x3
298#define HSO_PORT_PCSC 0x4
299#define HSO_PORT_APP2 0x5
300#define HSO_PORT_GPS_CONTROL 0x6
301#define HSO_PORT_MSD 0x7
302#define HSO_PORT_VOICE 0x8
303#define HSO_PORT_DIAG2 0x9
304#define HSO_PORT_DIAG 0x10
305#define HSO_PORT_MODEM 0x11
306#define HSO_PORT_NETWORK 0x12
307
308/* Additional device info */
309#define HSO_INFO_MASK 0xFF000000
310#define HSO_INFO_CRC_BUG 0x01000000
311
312/*****************************************************************************/
313/* Prototypes */
314/*****************************************************************************/
315/* Serial driver functions */
20b9d177 316static int hso_serial_tiocmset(struct tty_struct *tty,
72dc1c09
GKH		 317 unsigned int set, unsigned int clear);
318static void ctrl_callback(struct urb *urb);
8ef5ba63 319static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
72dc1c09
GKH		 320static void hso_kick_transmit(struct hso_serial *serial);
321/* Helper functions */
322static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
323 struct usb_device *usb, gfp_t gfp);
68a351c5
JD		 324static void handle_usb_error(int status, const char *function,
325 struct hso_device *hso_dev);
72dc1c09
GKH		 326static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
327 int type, int dir);
328static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
329static void hso_free_interface(struct usb_interface *intf);
330static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
331static int hso_stop_serial_device(struct hso_device *hso_dev);
332static int hso_start_net_device(struct hso_device *hso_dev);
333static void hso_free_shared_int(struct hso_shared_int *shared_int);
334static int hso_stop_net_device(struct hso_device *hso_dev);
335static void hso_serial_ref_free(struct kref *ref);
8ef5ba63
DJB		 336static void hso_std_serial_read_bulk_callback(struct urb *urb);
337static int hso_mux_serial_read(struct hso_serial *serial);
72dc1c09
GKH		 338static void async_get_intf(struct work_struct *data);
339static void async_put_intf(struct work_struct *data);
340static int hso_put_activity(struct hso_device *hso_dev);
341static int hso_get_activity(struct hso_device *hso_dev);
542f5482 342static void tiocmget_intr_callback(struct urb *urb);
68a351c5 343static void reset_device(struct work_struct *data);
72dc1c09
GKH		 344/*****************************************************************************/
345/* Helping functions */
346/*****************************************************************************/
347
348/* #define DEBUG */
349
0235f641
GKH		 350static inline struct hso_net *dev2net(struct hso_device *hso_dev)
351{
352 return hso_dev->port_data.dev_net;
353}
354
355static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
356{
357 return hso_dev->port_data.dev_serial;
358}
72dc1c09
GKH		 359
360/* Debugging functions */
361#ifdef DEBUG
362static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
363 unsigned int len)
364{
0235f641 365 static char name[255];
72dc1c09 366
0235f641
GKH		 367 sprintf(name, "hso[%d:%s]", line_count, func_name);
368 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
72dc1c09
GKH		 369}
370
371#define DUMP(buf_, len_) \
9ce673d5 372 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
72dc1c09
GKH		 373
374#define DUMP1(buf_, len_) \
375 do { \
376 if (0x01 & debug) \
377 DUMP(buf_, len_); \
378 } while (0)
379#else
380#define DUMP(buf_, len_)
381#define DUMP1(buf_, len_)
382#endif
383
384/* module parameters */
385static int debug;
386static int tty_major;
387static int disable_net;
388
389/* driver info */
390static const char driver_name[] = "hso";
391static const char tty_filename[] = "ttyHS";
242647bc 392static const char *version = __FILE__ ": " MOD_AUTHOR;
72dc1c09
GKH		 393/* the usb driver itself (registered in hso_init) */
394static struct usb_driver hso_driver;
395/* serial structures */
396static struct tty_driver *tty_drv;
397static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
398static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
399static spinlock_t serial_table_lock;
72dc1c09
GKH		 400
401static const s32 default_port_spec[] = {
402 HSO_INTF_MUX | HSO_PORT_NETWORK,
403 HSO_INTF_BULK | HSO_PORT_DIAG,
404 HSO_INTF_BULK | HSO_PORT_MODEM,
405 0
406};
407
408static const s32 icon321_port_spec[] = {
409 HSO_INTF_MUX | HSO_PORT_NETWORK,
410 HSO_INTF_BULK | HSO_PORT_DIAG2,
411 HSO_INTF_BULK | HSO_PORT_MODEM,
412 HSO_INTF_BULK | HSO_PORT_DIAG,
413 0
414};
415
416#define default_port_device(vendor, product) \
417 USB_DEVICE(vendor, product), \
418 .driver_info = (kernel_ulong_t)default_port_spec
419
420#define icon321_port_device(vendor, product) \
421 USB_DEVICE(vendor, product), \
422 .driver_info = (kernel_ulong_t)icon321_port_spec
423
424/* list of devices we support */
425static const struct usb_device_id hso_ids[] = {
426 {default_port_device(0x0af0, 0x6711)},
427 {default_port_device(0x0af0, 0x6731)},
428 {default_port_device(0x0af0, 0x6751)},
429 {default_port_device(0x0af0, 0x6771)},
430 {default_port_device(0x0af0, 0x6791)},
431 {default_port_device(0x0af0, 0x6811)},
432 {default_port_device(0x0af0, 0x6911)},
433 {default_port_device(0x0af0, 0x6951)},
434 {default_port_device(0x0af0, 0x6971)},
435 {default_port_device(0x0af0, 0x7011)},
436 {default_port_device(0x0af0, 0x7031)},
437 {default_port_device(0x0af0, 0x7051)},
438 {default_port_device(0x0af0, 0x7071)},
439 {default_port_device(0x0af0, 0x7111)},
440 {default_port_device(0x0af0, 0x7211)},
441 {default_port_device(0x0af0, 0x7251)},
442 {default_port_device(0x0af0, 0x7271)},
443 {default_port_device(0x0af0, 0x7311)},
444 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
445 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
446 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
95eacee8 447 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
72dc1c09
GKH		 448 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
449 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
67dd8246 450 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
72dc1c09
GKH		 451 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
452 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
453 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
bab04c3a 454 {USB_DEVICE(0x0af0, 0x7701)},
ec157937 455 {USB_DEVICE(0x0af0, 0x7706)},
bab04c3a
DJB		 456 {USB_DEVICE(0x0af0, 0x7801)},
457 {USB_DEVICE(0x0af0, 0x7901)},
ec157937
JD		 458 {USB_DEVICE(0x0af0, 0x7A01)},
459 {USB_DEVICE(0x0af0, 0x7A05)},
9961d842
JD		 460 {USB_DEVICE(0x0af0, 0x8200)},
461 {USB_DEVICE(0x0af0, 0x8201)},
ec157937
JD		 462 {USB_DEVICE(0x0af0, 0x8300)},
463 {USB_DEVICE(0x0af0, 0x8302)},
464 {USB_DEVICE(0x0af0, 0x8304)},
465 {USB_DEVICE(0x0af0, 0x8400)},
dd7496f2
FA		 466 {USB_DEVICE(0x0af0, 0x8600)},
467 {USB_DEVICE(0x0af0, 0x8800)},
468 {USB_DEVICE(0x0af0, 0x8900)},
5c7bf2f4 469 {USB_DEVICE(0x0af0, 0x9000)},
61ab9efd 470 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */
9961d842 471 {USB_DEVICE(0x0af0, 0xd035)},
67dd8246 472 {USB_DEVICE(0x0af0, 0xd055)},
9961d842
JD		 473 {USB_DEVICE(0x0af0, 0xd155)},
474 {USB_DEVICE(0x0af0, 0xd255)},
475 {USB_DEVICE(0x0af0, 0xd057)},
476 {USB_DEVICE(0x0af0, 0xd157)},
477 {USB_DEVICE(0x0af0, 0xd257)},
478 {USB_DEVICE(0x0af0, 0xd357)},
ec157937
JD		 479 {USB_DEVICE(0x0af0, 0xd058)},
480 {USB_DEVICE(0x0af0, 0xc100)},
72dc1c09
GKH		 481 {}
482};
483MODULE_DEVICE_TABLE(usb, hso_ids);
484
485/* Sysfs attribute */
486static ssize_t hso_sysfs_show_porttype(struct device *dev,
487 struct device_attribute *attr,
488 char *buf)
489{
1aec5bdf 490 struct hso_device *hso_dev = dev_get_drvdata(dev);
72dc1c09
GKH		 491 char *port_name;
492
493 if (!hso_dev)
494 return 0;
495
496 switch (hso_dev->port_spec & HSO_PORT_MASK) {
497 case HSO_PORT_CONTROL:
498 port_name = "Control";
499 break;
500 case HSO_PORT_APP:
501 port_name = "Application";
502 break;
503 case HSO_PORT_APP2:
504 port_name = "Application2";
505 break;
506 case HSO_PORT_GPS:
507 port_name = "GPS";
508 break;
509 case HSO_PORT_GPS_CONTROL:
510 port_name = "GPS Control";
511 break;
512 case HSO_PORT_PCSC:
513 port_name = "PCSC";
514 break;
515 case HSO_PORT_DIAG:
516 port_name = "Diagnostic";
517 break;
518 case HSO_PORT_DIAG2:
519 port_name = "Diagnostic2";
520 break;
521 case HSO_PORT_MODEM:
522 port_name = "Modem";
523 break;
524 case HSO_PORT_NETWORK:
525 port_name = "Network";
526 break;
527 default:
528 port_name = "Unknown";
529 break;
530 }
531
532 return sprintf(buf, "%s\n", port_name);
533}
534static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
535
8ef5ba63
DJB		 536static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
537{
538 int idx;
539
540 for (idx = 0; idx < serial->num_rx_urbs; idx++)
541 if (serial->rx_urb[idx] == urb)
542 return idx;
543 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
544 return -1;
545}
546
72dc1c09
GKH		 547/* converts mux value to a port spec value */
548static u32 hso_mux_to_port(int mux)
549{
550 u32 result;
551
552 switch (mux) {
553 case 0x1:
554 result = HSO_PORT_CONTROL;
555 break;
556 case 0x2:
557 result = HSO_PORT_APP;
558 break;
559 case 0x4:
560 result = HSO_PORT_PCSC;
561 break;
562 case 0x8:
563 result = HSO_PORT_GPS;
564 break;
565 case 0x10:
566 result = HSO_PORT_APP2;
567 break;
568 default:
569 result = HSO_PORT_NO_PORT;
570 }
571 return result;
572}
573
574/* converts port spec value to a mux value */
575static u32 hso_port_to_mux(int port)
576{
577 u32 result;
578
579 switch (port & HSO_PORT_MASK) {
580 case HSO_PORT_CONTROL:
581 result = 0x0;
582 break;
583 case HSO_PORT_APP:
584 result = 0x1;
585 break;
586 case HSO_PORT_PCSC:
587 result = 0x2;
588 break;
589 case HSO_PORT_GPS:
590 result = 0x3;
591 break;
592 case HSO_PORT_APP2:
593 result = 0x4;
594 break;
595 default:
596 result = 0x0;
597 }
598 return result;
599}
600
601static struct hso_serial *get_serial_by_shared_int_and_type(
602 struct hso_shared_int *shared_int,
603 int mux)
604{
605 int i, port;
606
607 port = hso_mux_to_port(mux);
608
609 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
8e95a202
JP		 610 if (serial_table[i] &&
611 (dev2ser(serial_table[i])->shared_int == shared_int) &&
612 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
72dc1c09
GKH		 613 return dev2ser(serial_table[i]);
614 }
615 }
616
617 return NULL;
618}
619
620static struct hso_serial *get_serial_by_index(unsigned index)
621{
0235f641 622 struct hso_serial *serial = NULL;
72dc1c09
GKH		 623 unsigned long flags;
624
72dc1c09 625 spin_lock_irqsave(&serial_table_lock, flags);
0235f641
GKH		 626 if (serial_table[index])
627 serial = dev2ser(serial_table[index]);
72dc1c09
GKH		 628 spin_unlock_irqrestore(&serial_table_lock, flags);
629
630 return serial;
631}
632
633static int get_free_serial_index(void)
634{
635 int index;
636 unsigned long flags;
637
638 spin_lock_irqsave(&serial_table_lock, flags);
639 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
640 if (serial_table[index] == NULL) {
641 spin_unlock_irqrestore(&serial_table_lock, flags);
642 return index;
643 }
644 }
645 spin_unlock_irqrestore(&serial_table_lock, flags);
646
647 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
648 return -1;
649}
650
651static void set_serial_by_index(unsigned index, struct hso_serial *serial)
652{
653 unsigned long flags;
0235f641 654
72dc1c09
GKH		 655 spin_lock_irqsave(&serial_table_lock, flags);
656 if (serial)
657 serial_table[index] = serial->parent;
658 else
659 serial_table[index] = NULL;
660 spin_unlock_irqrestore(&serial_table_lock, flags);
661}
662
68a351c5
JD		 663static void handle_usb_error(int status, const char *function,
664 struct hso_device *hso_dev)
72dc1c09
GKH		 665{
666 char *explanation;
667
668 switch (status) {
669 case -ENODEV:
670 explanation = "no device";
671 break;
672 case -ENOENT:
673 explanation = "endpoint not enabled";
674 break;
675 case -EPIPE:
676 explanation = "endpoint stalled";
677 break;
678 case -ENOSPC:
679 explanation = "not enough bandwidth";
680 break;
681 case -ESHUTDOWN:
682 explanation = "device disabled";
683 break;
684 case -EHOSTUNREACH:
685 explanation = "device suspended";
686 break;
687 case -EINVAL:
688 case -EAGAIN:
689 case -EFBIG:
690 case -EMSGSIZE:
691 explanation = "internal error";
692 break;
68a351c5
JD		 693 case -EILSEQ:
694 case -EPROTO:
695 case -ETIME:
696 case -ETIMEDOUT:
697 explanation = "protocol error";
698 if (hso_dev)
699 schedule_work(&hso_dev->reset_device);
700 break;
72dc1c09
GKH		 701 default:
702 explanation = "unknown status";
703 break;
704 }
68a351c5
JD		 705
706 /* log a meaningful explanation of an USB status */
72dc1c09
GKH		 707 D1("%s: received USB status - %s (%d)", function, explanation, status);
708}
709
710/* Network interface functions */
711
712/* called when net interface is brought up by ifconfig */
713static int hso_net_open(struct net_device *net)
714{
715 struct hso_net *odev = netdev_priv(net);
716 unsigned long flags = 0;
717
718 if (!odev) {
719 dev_err(&net->dev, "No net device !\n");
720 return -ENODEV;
721 }
722
723 odev->skb_tx_buf = NULL;
724
725 /* setup environment */
726 spin_lock_irqsave(&odev->net_lock, flags);
727 odev->rx_parse_state = WAIT_IP;
728 odev->rx_buf_size = 0;
729 odev->rx_buf_missing = sizeof(struct iphdr);
730 spin_unlock_irqrestore(&odev->net_lock, flags);
731
72dc1c09
GKH		 732 /* We are up and running. */
733 set_bit(HSO_NET_RUNNING, &odev->flags);
889bd9b6 734 hso_start_net_device(odev->parent);
72dc1c09
GKH		 735
736 /* Tell the kernel we are ready to start receiving from it */
737 netif_start_queue(net);
738
739 return 0;
740}
741
742/* called when interface is brought down by ifconfig */
743static int hso_net_close(struct net_device *net)
744{
745 struct hso_net *odev = netdev_priv(net);
746
747 /* we don't need the queue anymore */
748 netif_stop_queue(net);
749 /* no longer running */
750 clear_bit(HSO_NET_RUNNING, &odev->flags);
751
752 hso_stop_net_device(odev->parent);
753
754 /* done */
755 return 0;
756}
757
758/* USB tells is xmit done, we should start the netqueue again */
759static void write_bulk_callback(struct urb *urb)
760{
761 struct hso_net *odev = urb->context;
762 int status = urb->status;
763
764 /* Sanity check */
765 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
766 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
767 return;
768 }
769
770 /* Do we still have a valid kernel network device? */
771 if (!netif_device_present(odev->net)) {
772 dev_err(&urb->dev->dev, "%s: net device not present\n",
773 __func__);
774 return;
775 }
776
777 /* log status, but don't act on it, we don't need to resubmit anything
778 * anyhow */
779 if (status)
68a351c5 780 handle_usb_error(status, __func__, odev->parent);
72dc1c09
GKH		 781
782 hso_put_activity(odev->parent);
783
784 /* Tell the network interface we are ready for another frame */
785 netif_wake_queue(odev->net);
786}
787
788/* called by kernel when we need to transmit a packet */
25a79c41
SH		 789static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
790 struct net_device *net)
72dc1c09
GKH		 791{
792 struct hso_net *odev = netdev_priv(net);
793 int result;
794
795 /* Tell the kernel, "No more frames 'til we are done with this one." */
796 netif_stop_queue(net);
797 if (hso_get_activity(odev->parent) == -EAGAIN) {
798 odev->skb_tx_buf = skb;
6ed10654 799 return NETDEV_TX_OK;
72dc1c09
GKH		 800 }
801
802 /* log if asked */
803 DUMP1(skb->data, skb->len);
804 /* Copy it from kernel memory to OUR memory */
805 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
806 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
807
808 /* Fill in the URB for shipping it out. */
809 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
810 odev->parent->usb,
811 usb_sndbulkpipe(odev->parent->usb,
812 odev->out_endp->
813 bEndpointAddress & 0x7F),
814 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
815 odev);
816
817 /* Deal with the Zero Length packet problem, I hope */
818 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
819
820 /* Send the URB on its merry way. */
821 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
822 if (result) {
823 dev_warn(&odev->parent->interface->dev,
8a5c9c49 824 "failed mux_bulk_tx_urb %d\n", result);
72dc1c09
GKH		 825 net->stats.tx_errors++;
826 netif_start_queue(net);
827 } else {
828 net->stats.tx_packets++;
829 net->stats.tx_bytes += skb->len;
72dc1c09
GKH		 830 }
831 dev_kfree_skb(skb);
832 /* we're done */
5b2c4b97 833 return NETDEV_TX_OK;
72dc1c09
GKH		 834}
835
0fc0b732 836static const struct ethtool_ops ops = {
72dc1c09
GKH		 837 .get_link = ethtool_op_get_link
838};
839
840/* called when a packet did not ack after watchdogtimeout */
841static void hso_net_tx_timeout(struct net_device *net)
842{
843 struct hso_net *odev = netdev_priv(net);
844
845 if (!odev)
846 return;
847
848 /* Tell syslog we are hosed. */
849 dev_warn(&net->dev, "Tx timed out.\n");
850
851 /* Tear the waiting frame off the list */
8e95a202
JP		 852 if (odev->mux_bulk_tx_urb &&
853 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
72dc1c09
GKH		 854 usb_unlink_urb(odev->mux_bulk_tx_urb);
855
856 /* Update statistics */
857 net->stats.tx_errors++;
858}
859
860/* make a real packet from the received USB buffer */
861static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
862 unsigned int count, unsigned char is_eop)
863{
864 unsigned short temp_bytes;
865 unsigned short buffer_offset = 0;
866 unsigned short frame_len;
867 unsigned char *tmp_rx_buf;
868
869 /* log if needed */
870 D1("Rx %d bytes", count);
871 DUMP(ip_pkt, min(128, (int)count));
872
873 while (count) {
874 switch (odev->rx_parse_state) {
875 case WAIT_IP:
876 /* waiting for IP header. */
877 /* wanted bytes - size of ip header */
878 temp_bytes =
879 (count <
880 odev->rx_buf_missing) ? count : odev->
881 rx_buf_missing;
882
883 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
884 odev->rx_buf_size, ip_pkt + buffer_offset,
885 temp_bytes);
886
887 odev->rx_buf_size += temp_bytes;
888 buffer_offset += temp_bytes;
889 odev->rx_buf_missing -= temp_bytes;
890 count -= temp_bytes;
891
892 if (!odev->rx_buf_missing) {
893 /* header is complete allocate an sk_buffer and
894 * continue to WAIT_DATA */
895 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
896
897 if ((frame_len > DEFAULT_MRU) ||
898 (frame_len < sizeof(struct iphdr))) {
899 dev_err(&odev->net->dev,
900 "Invalid frame (%d) length\n",
901 frame_len);
902 odev->rx_parse_state = WAIT_SYNC;
903 continue;
904 }
905 /* Allocate an sk_buff */
d65a68a8
PZ		 906 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
907 frame_len);
72dc1c09
GKH		 908 if (!odev->skb_rx_buf) {
909 /* We got no receive buffer. */
910 D1("could not allocate memory");
911 odev->rx_parse_state = WAIT_SYNC;
912 return;
913 }
72dc1c09
GKH		 914
915 /* Copy what we got so far. make room for iphdr
916 * after tail. */
917 tmp_rx_buf =
918 skb_put(odev->skb_rx_buf,
919 sizeof(struct iphdr));
920 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
921 sizeof(struct iphdr));
922
923 /* ETH_HLEN */
924 odev->rx_buf_size = sizeof(struct iphdr);
925
926 /* Filip actually use .tot_len */
927 odev->rx_buf_missing =
928 frame_len - sizeof(struct iphdr);
929 odev->rx_parse_state = WAIT_DATA;
930 }
931 break;
932
933 case WAIT_DATA:
934 temp_bytes = (count < odev->rx_buf_missing)
935 ? count : odev->rx_buf_missing;
936
937 /* Copy the rest of the bytes that are left in the
938 * buffer into the waiting sk_buf. */
939 /* Make room for temp_bytes after tail. */
940 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
941 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
942
943 odev->rx_buf_missing -= temp_bytes;
944 count -= temp_bytes;
945 buffer_offset += temp_bytes;
946 odev->rx_buf_size += temp_bytes;
947 if (!odev->rx_buf_missing) {
948 /* Packet is complete. Inject into stack. */
949 /* We have IP packet here */
09640e63 950 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
72dc1c09
GKH		 951 skb_reset_mac_header(odev->skb_rx_buf);
952
953 /* Ship it off to the kernel */
954 netif_rx(odev->skb_rx_buf);
955 /* No longer our buffer. */
956 odev->skb_rx_buf = NULL;
957
958 /* update out statistics */
959 odev->net->stats.rx_packets++;
960
961 odev->net->stats.rx_bytes += odev->rx_buf_size;
962
963 odev->rx_buf_size = 0;
964 odev->rx_buf_missing = sizeof(struct iphdr);
965 odev->rx_parse_state = WAIT_IP;
966 }
967 break;
968
969 case WAIT_SYNC:
970 D1(" W_S");
971 count = 0;
972 break;
973 default:
974 D1(" ");
975 count--;
976 break;
977 }
978 }
979
980 /* Recovery mechanism for WAIT_SYNC state. */
981 if (is_eop) {
982 if (odev->rx_parse_state == WAIT_SYNC) {
983 odev->rx_parse_state = WAIT_IP;
984 odev->rx_buf_size = 0;
985 odev->rx_buf_missing = sizeof(struct iphdr);
986 }
987 }
988}
989
5591c75d
JP		 990static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
991{
992 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
993 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
994
995 if (((rest == 5) || (rest == 6)) &&
996 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
997 crc_check, 4)) {
998 urb->actual_length -= 4;
999 }
1000}
1001
72dc1c09
GKH		 1002/* Moving data from usb to kernel (in interrupt state) */
1003static void read_bulk_callback(struct urb *urb)
1004{
1005 struct hso_net *odev = urb->context;
1006 struct net_device *net;
1007 int result;
1008 int status = urb->status;
1009
1010 /* is al ok? (Filip: Who's Al ?) */
1011 if (status) {
68a351c5 1012 handle_usb_error(status, __func__, odev->parent);
72dc1c09
GKH		 1013 return;
1014 }
1015
1016 /* Sanity check */
1017 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1018 D1("BULK IN callback but driver is not active!");
1019 return;
1020 }
1021 usb_mark_last_busy(urb->dev);
1022
1023 net = odev->net;
1024
1025 if (!netif_device_present(net)) {
1026 /* Somebody killed our network interface... */
1027 return;
1028 }
1029
5591c75d
JP		 1030 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1031 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
72dc1c09
GKH		 1032
1033 /* do we even have a packet? */
1034 if (urb->actual_length) {
1035 /* Handle the IP stream, add header and push it onto network
1036 * stack if the packet is complete. */
1037 spin_lock(&odev->net_lock);
1038 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1039 (urb->transfer_buffer_length >
1040 urb->actual_length) ? 1 : 0);
1041 spin_unlock(&odev->net_lock);
1042 }
1043
1044 /* We are done with this URB, resubmit it. Prep the USB to wait for
1045 * another frame. Reuse same as received. */
1046 usb_fill_bulk_urb(urb,
1047 odev->parent->usb,
1048 usb_rcvbulkpipe(odev->parent->usb,
1049 odev->in_endp->
1050 bEndpointAddress & 0x7F),
1051 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1052 read_bulk_callback, odev);
1053
1054 /* Give this to the USB subsystem so it can tell us when more data
1055 * arrives. */
1056 result = usb_submit_urb(urb, GFP_ATOMIC);
1057 if (result)
1058 dev_warn(&odev->parent->interface->dev,
8a5c9c49 1059 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
72dc1c09
GKH		 1060 result);
1061}
1062
1063/* Serial driver functions */
1064
ac9720c3 1065static void hso_init_termios(struct ktermios *termios)
72dc1c09 1066{
72dc1c09
GKH		 1067 /*
1068 * The default requirements for this device are:
1069 */
72dc1c09
GKH		 1070 termios->c_iflag &=
1071 ~(IGNBRK /* disable ignore break */
1072 | BRKINT /* disable break causes interrupt */
1073 | PARMRK /* disable mark parity errors */
1074 | ISTRIP /* disable clear high bit of input characters */
1075 | INLCR /* disable translate NL to CR */
1076 | IGNCR /* disable ignore CR */
1077 | ICRNL /* disable translate CR to NL */
1078 | IXON); /* disable enable XON/XOFF flow control */
1079
1080 /* disable postprocess output characters */
1081 termios->c_oflag &= ~OPOST;
1082
1083 termios->c_lflag &=
1084 ~(ECHO /* disable echo input characters */
1085 | ECHONL /* disable echo new line */
1086 | ICANON /* disable erase, kill, werase, and rprnt
1087 special characters */
1088 | ISIG /* disable interrupt, quit, and suspend special
1089 characters */
1090 | IEXTEN); /* disable non-POSIX special characters */
1091
1092 termios->c_cflag &=
1093 ~(CSIZE /* no size */
1094 | PARENB /* disable parity bit */
1095 | CBAUD /* clear current baud rate */
1096 | CBAUDEX); /* clear current buad rate */
1097
1098 termios->c_cflag |= CS8; /* character size 8 bits */
1099
1100 /* baud rate 115200 */
ac9720c3
AC		 1101 tty_termios_encode_baud_rate(termios, 115200, 115200);
1102}
1103
1104static void _hso_serial_set_termios(struct tty_struct *tty,
1105 struct ktermios *old)
1106{
30409420 1107 struct hso_serial *serial = tty->driver_data;
ac9720c3
AC		 1108
1109 if (!serial) {
1110 printk(KERN_ERR "%s: no tty structures", __func__);
1111 return;
1112 }
1113
1114 D4("port %d", serial->minor);
72dc1c09
GKH		 1115
1116 /*
ac9720c3 1117 * Fix up unsupported bits
72dc1c09 1118 */
adc8d746 1119 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
ac9720c3 1120
adc8d746 1121 tty->termios.c_cflag &=
ac9720c3
AC		 1122 ~(CSIZE /* no size */
1123 | PARENB /* disable parity bit */
1124 | CBAUD /* clear current baud rate */
1125 | CBAUDEX); /* clear current buad rate */
1126
adc8d746 1127 tty->termios.c_cflag |= CS8; /* character size 8 bits */
ac9720c3
AC		 1128
1129 /* baud rate 115200 */
1130 tty_encode_baud_rate(tty, 115200, 115200);
72dc1c09
GKH		 1131}
1132
8ef5ba63
DJB		 1133static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1134{
1135 int result;
8ef5ba63
DJB		 1136 /* We are done with this URB, resubmit it. Prep the USB to wait for
1137 * another frame */
1138 usb_fill_bulk_urb(urb, serial->parent->usb,
1139 usb_rcvbulkpipe(serial->parent->usb,
1140 serial->in_endp->
1141 bEndpointAddress & 0x7F),
1142 urb->transfer_buffer, serial->rx_data_length,
1143 hso_std_serial_read_bulk_callback, serial);
1144 /* Give this to the USB subsystem so it can tell us when more data
1145 * arrives. */
1146 result = usb_submit_urb(urb, GFP_ATOMIC);
1147 if (result) {
1148 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1149 __func__, result);
1150 }
1151}
1152
1153
1154
1155
1156static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1157{
1158 int count;
1159 struct urb *curr_urb;
1160
1161 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1162 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1163 count = put_rxbuf_data(curr_urb, serial);
1164 if (count == -1)
1165 return;
1166 if (count == 0) {
1167 serial->curr_rx_urb_idx++;
1168 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1169 serial->curr_rx_urb_idx = 0;
1170 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1171 }
1172 }
1173}
1174
1175static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1176{
1177 int count = 0;
1178 struct urb *urb;
1179
1180 urb = serial->rx_urb[0];
5ce76e77 1181 if (serial->port.count > 0) {
8ef5ba63
DJB		 1182 count = put_rxbuf_data(urb, serial);
1183 if (count == -1)
1184 return;
1185 }
1186 /* Re issue a read as long as we receive data. */
1187
1188 if (count == 0 && ((urb->actual_length != 0) ||
1189 (serial->rx_state == RX_PENDING))) {
1190 serial->rx_state = RX_SENT;
1191 hso_mux_serial_read(serial);
1192 } else
1193 serial->rx_state = RX_IDLE;
1194}
1195
1196
1197/* read callback for Diag and CS port */
1198static void hso_std_serial_read_bulk_callback(struct urb *urb)
1199{
1200 struct hso_serial *serial = urb->context;
1201 int status = urb->status;
1202
4ccd0bb9
DC		 1203 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1204
8ef5ba63
DJB		 1205 /* sanity check */
1206 if (!serial) {
1207 D1("serial == NULL");
1208 return;
4ccd0bb9
DC		 1209 }
1210 if (status) {
68a351c5 1211 handle_usb_error(status, __func__, serial->parent);
8ef5ba63
DJB		 1212 return;
1213 }
1214
8ef5ba63
DJB		 1215 D1("Actual length = %d\n", urb->actual_length);
1216 DUMP1(urb->transfer_buffer, urb->actual_length);
1217
1218 /* Anyone listening? */
5ce76e77 1219 if (serial->port.count == 0)
8ef5ba63
DJB		 1220 return;
1221
4ccd0bb9
DC		 1222 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1223 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1224 /* Valid data, handle RX data */
1225 spin_lock(&serial->serial_lock);
1226 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1227 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1228 spin_unlock(&serial->serial_lock);
8ef5ba63
DJB		 1229}
1230
1231/*
1232 * This needs to be a tasklet otherwise we will
1233 * end up recursively calling this function.
1234 */
0227abc9 1235static void hso_unthrottle_tasklet(struct hso_serial *serial)
8ef5ba63
DJB		 1236{
1237 unsigned long flags;
1238
1239 spin_lock_irqsave(&serial->serial_lock, flags);
1240 if ((serial->parent->port_spec & HSO_INTF_MUX))
1241 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1242 else
1243 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1244 spin_unlock_irqrestore(&serial->serial_lock, flags);
1245}
1246
1247static void hso_unthrottle(struct tty_struct *tty)
1248{
30409420 1249 struct hso_serial *serial = tty->driver_data;
8ef5ba63
DJB		 1250
1251 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1252}
1253
72dc1c09
GKH		 1254/* open the requested serial port */
1255static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1256{
1257 struct hso_serial *serial = get_serial_by_index(tty->index);
ab153d84 1258 int result;
72dc1c09
GKH		 1259
1260 /* sanity check */
1261 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
e136e303 1262 WARN_ON(1);
72dc1c09
GKH		 1263 tty->driver_data = NULL;
1264 D1("Failed to open port");
1265 return -ENODEV;
1266 }
1267
ab153d84 1268 mutex_lock(&serial->parent->mutex);
ab153d84
DM		 1269 result = usb_autopm_get_interface(serial->parent->interface);
1270 if (result < 0)
72dc1c09
GKH		 1271 goto err_out;
1272
1273 D1("Opening %d", serial->minor);
72dc1c09
GKH		 1274
1275 /* setup */
1276 tty->driver_data = serial;
9f8c0b08 1277 tty_port_tty_set(&serial->port, tty);
72dc1c09 1278
2f9889a2 1279 /* check for port already opened, if not set the termios */
5ce76e77
JS		 1280 serial->port.count++;
1281 if (serial->port.count == 1) {
8ef5ba63 1282 serial->rx_state = RX_IDLE;
72dc1c09
GKH		 1283 /* Force default termio settings */
1284 _hso_serial_set_termios(tty, NULL);
8ef5ba63
DJB		 1285 tasklet_init(&serial->unthrottle_tasklet,
1286 (void (*)(unsigned long))hso_unthrottle_tasklet,
1287 (unsigned long)serial);
ab153d84
DM		 1288 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1289 if (result) {
72dc1c09 1290 hso_stop_serial_device(serial->parent);
5ce76e77 1291 serial->port.count--;
29bd3bc1
OS		 1292 } else {
1293 kref_get(&serial->parent->ref);
72dc1c09
GKH		 1294 }
1295 } else {
1296 D1("Port was already open");
1297 }
1298
1299 usb_autopm_put_interface(serial->parent->interface);
1300
1301 /* done */
ab153d84 1302 if (result)
20b9d177 1303 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
72dc1c09 1304err_out:
ab153d84
DM		 1305 mutex_unlock(&serial->parent->mutex);
1306 return result;
72dc1c09
GKH		 1307}
1308
1309/* close the requested serial port */
1310static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1311{
1312 struct hso_serial *serial = tty->driver_data;
1313 u8 usb_gone;
1314
1315 D1("Closing serial port");
1316
e136e303
AC		 1317 /* Open failed, no close cleanup required */
1318 if (serial == NULL)
1319 return;
1320
ab153d84 1321 mutex_lock(&serial->parent->mutex);
72dc1c09
GKH		 1322 usb_gone = serial->parent->usb_gone;
1323
1324 if (!usb_gone)
1325 usb_autopm_get_interface(serial->parent->interface);
1326
1327 /* reset the rts and dtr */
1328 /* do the actual close */
5ce76e77 1329 serial->port.count--;
dcfcb256 1330
5ce76e77
JS		 1331 if (serial->port.count <= 0) {
1332 serial->port.count = 0;
9f8c0b08 1333 tty_port_tty_set(&serial->port, NULL);
72dc1c09
GKH		 1334 if (!usb_gone)
1335 hso_stop_serial_device(serial->parent);
8ef5ba63 1336 tasklet_kill(&serial->unthrottle_tasklet);
72dc1c09 1337 }
8ef5ba63 1338
72dc1c09
GKH		 1339 if (!usb_gone)
1340 usb_autopm_put_interface(serial->parent->interface);
ab153d84
DM		 1341
1342 mutex_unlock(&serial->parent->mutex);
72dc1c09
GKH		 1343}
1344
1345/* close the requested serial port */
1346static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1347 int count)
1348{
30409420 1349 struct hso_serial *serial = tty->driver_data;
72dc1c09
GKH		 1350 int space, tx_bytes;
1351 unsigned long flags;
1352
1353 /* sanity check */
1354 if (serial == NULL) {
1355 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1356 return -ENODEV;
1357 }
1358
1359 spin_lock_irqsave(&serial->serial_lock, flags);
1360
1361 space = serial->tx_data_length - serial->tx_buffer_count;
1362 tx_bytes = (count < space) ? count : space;
1363
1364 if (!tx_bytes)
1365 goto out;
1366
1367 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1368 serial->tx_buffer_count += tx_bytes;
1369
1370out:
1371 spin_unlock_irqrestore(&serial->serial_lock, flags);
1372
1373 hso_kick_transmit(serial);
1374 /* done */
1375 return tx_bytes;
1376}
1377
1378/* how much room is there for writing */
1379static int hso_serial_write_room(struct tty_struct *tty)
1380{
30409420 1381 struct hso_serial *serial = tty->driver_data;
72dc1c09
GKH		 1382 int room;
1383 unsigned long flags;
1384
1385 spin_lock_irqsave(&serial->serial_lock, flags);
1386 room = serial->tx_data_length - serial->tx_buffer_count;
1387 spin_unlock_irqrestore(&serial->serial_lock, flags);
1388
1389 /* return free room */
1390 return room;
1391}
1392
29bd3bc1
OS		 1393static void hso_serial_cleanup(struct tty_struct *tty)
1394{
1395 struct hso_serial *serial = tty->driver_data;
1396
1397 if (!serial)
1398 return;
1399
1400 kref_put(&serial->parent->ref, hso_serial_ref_free);
1401}
1402
72dc1c09
GKH		 1403/* setup the term */
1404static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1405{
30409420 1406 struct hso_serial *serial = tty->driver_data;
72dc1c09
GKH		 1407 unsigned long flags;
1408
1409 if (old)
1410 D5("Termios called with: cflags new[%d] - old[%d]",
adc8d746 1411 tty->termios.c_cflag, old->c_cflag);
72dc1c09
GKH		 1412
1413 /* the actual setup */
1414 spin_lock_irqsave(&serial->serial_lock, flags);
5ce76e77 1415 if (serial->port.count)
72dc1c09
GKH		 1416 _hso_serial_set_termios(tty, old);
1417 else
adc8d746 1418 tty->termios = *old;
72dc1c09
GKH		 1419 spin_unlock_irqrestore(&serial->serial_lock, flags);
1420
1421 /* done */
72dc1c09
GKH		 1422}
1423
1424/* how many characters in the buffer */
1425static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1426{
30409420 1427 struct hso_serial *serial = tty->driver_data;
72dc1c09
GKH		 1428 int chars;
1429 unsigned long flags;
1430
1431 /* sanity check */
1432 if (serial == NULL)
1433 return 0;
1434
1435 spin_lock_irqsave(&serial->serial_lock, flags);
1436 chars = serial->tx_buffer_count;
1437 spin_unlock_irqrestore(&serial->serial_lock, flags);
1438
1439 return chars;
1440}
0227abc9
HE		 1441static int tiocmget_submit_urb(struct hso_serial *serial,
1442 struct hso_tiocmget *tiocmget,
1443 struct usb_device *usb)
542f5482
DJB		 1444{
1445 int result;
1446
1447 if (serial->parent->usb_gone)
1448 return -ENODEV;
1449 usb_fill_int_urb(tiocmget->urb, usb,
1450 usb_rcvintpipe(usb,
1451 tiocmget->endp->
1452 bEndpointAddress & 0x7F),
1453 &tiocmget->serial_state_notification,
1454 sizeof(struct hso_serial_state_notification),
1455 tiocmget_intr_callback, serial,
1456 tiocmget->endp->bInterval);
1457 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1458 if (result) {
1459 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1460 result);
1461 }
1462 return result;
1463
1464}
1465
1466static void tiocmget_intr_callback(struct urb *urb)
1467{
1468 struct hso_serial *serial = urb->context;
1469 struct hso_tiocmget *tiocmget;
1470 int status = urb->status;
1471 u16 UART_state_bitmap, prev_UART_state_bitmap;
1472 struct uart_icount *icount;
1473 struct hso_serial_state_notification *serial_state_notification;
1474 struct usb_device *usb;
e5e97ee9 1475 int if_num;
542f5482
DJB		 1476
1477 /* Sanity checks */
1478 if (!serial)
1479 return;
1480 if (status) {
68a351c5 1481 handle_usb_error(status, __func__, serial->parent);
542f5482
DJB		 1482 return;
1483 }
e5e97ee9
DW		 1484
1485 /* tiocmget is only supported on HSO_PORT_MODEM */
542f5482
DJB		 1486 tiocmget = serial->tiocmget;
1487 if (!tiocmget)
1488 return;
e5e97ee9
DW		 1489 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
1490
542f5482 1491 usb = serial->parent->usb;
e5e97ee9
DW		 1492 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1493
1494 /* wIndex should be the USB interface number of the port to which the
1495 * notification applies, which should always be the Modem port.
1496 */
542f5482
DJB		 1497 serial_state_notification = &tiocmget->serial_state_notification;
1498 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1499 serial_state_notification->bNotification != B_NOTIFICATION ||
1500 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
e5e97ee9 1501 le16_to_cpu(serial_state_notification->wIndex) != if_num ||
542f5482
DJB		 1502 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1503 dev_warn(&usb->dev,
1504 "hso received invalid serial state notification\n");
1505 DUMP(serial_state_notification,
9ce673d5 1506 sizeof(struct hso_serial_state_notification));
542f5482
DJB		 1507 } else {
1508
1509 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1510 UART_state_bitmap);
1511 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1512 icount = &tiocmget->icount;
1513 spin_lock(&serial->serial_lock);
1514 if ((UART_state_bitmap & B_OVERRUN) !=
1515 (prev_UART_state_bitmap & B_OVERRUN))
1516 icount->parity++;
1517 if ((UART_state_bitmap & B_PARITY) !=
1518 (prev_UART_state_bitmap & B_PARITY))
1519 icount->parity++;
1520 if ((UART_state_bitmap & B_FRAMING) !=
1521 (prev_UART_state_bitmap & B_FRAMING))
1522 icount->frame++;
1523 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1524 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1525 icount->rng++;
1526 if ((UART_state_bitmap & B_BREAK) !=
1527 (prev_UART_state_bitmap & B_BREAK))
1528 icount->brk++;
1529 if ((UART_state_bitmap & B_TX_CARRIER) !=
1530 (prev_UART_state_bitmap & B_TX_CARRIER))
1531 icount->dsr++;
1532 if ((UART_state_bitmap & B_RX_CARRIER) !=
1533 (prev_UART_state_bitmap & B_RX_CARRIER))
1534 icount->dcd++;
1535 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1536 spin_unlock(&serial->serial_lock);
1537 tiocmget->intr_completed = 1;
1538 wake_up_interruptible(&tiocmget->waitq);
1539 }
1540 memset(serial_state_notification, 0,
1541 sizeof(struct hso_serial_state_notification));
1542 tiocmget_submit_urb(serial,
1543 tiocmget,
1544 serial->parent->usb);
1545}
1546
1547/*
1548 * next few functions largely stolen from drivers/serial/serial_core.c
1549 */
1550/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1551 * - mask passed in arg for lines of interest
1552 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1553 * Caller should use TIOCGICOUNT to see which one it was
1554 */
1555static int
1556hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1557{
1558 DECLARE_WAITQUEUE(wait, current);
1559 struct uart_icount cprev, cnow;
1560 struct hso_tiocmget *tiocmget;
1561 int ret;
1562
1563 tiocmget = serial->tiocmget;
1564 if (!tiocmget)
1565 return -ENOENT;
1566 /*
1567 * note the counters on entry
1568 */
1569 spin_lock_irq(&serial->serial_lock);
1570 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1571 spin_unlock_irq(&serial->serial_lock);
1572 add_wait_queue(&tiocmget->waitq, &wait);
1573 for (;;) {
1574 spin_lock_irq(&serial->serial_lock);
1575 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1576 spin_unlock_irq(&serial->serial_lock);
1577 set_current_state(TASK_INTERRUPTIBLE);
1578 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1579 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1580 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1581 ret = 0;
1582 break;
1583 }
1584 schedule();
1585 /* see if a signal did it */
1586 if (signal_pending(current)) {
1587 ret = -ERESTARTSYS;
1588 break;
1589 }
1590 cprev = cnow;
1591 }
1592 current->state = TASK_RUNNING;
1593 remove_wait_queue(&tiocmget->waitq, &wait);
1594
1595 return ret;
1596}
1597
1598/*
1599 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1600 * Return: write counters to the user passed counter struct
1601 * NB: both 1->0 and 0->1 transitions are counted except for
1602 * RI where only 0->1 is counted.
1603 */
0bca1b91
AC		 1604static int hso_get_count(struct tty_struct *tty,
1605 struct serial_icounter_struct *icount)
542f5482 1606{
542f5482 1607 struct uart_icount cnow;
30409420 1608 struct hso_serial *serial = tty->driver_data;
542f5482
DJB		 1609 struct hso_tiocmget *tiocmget = serial->tiocmget;
1610
22ad7499 1611 memset(icount, 0, sizeof(struct serial_icounter_struct));
7011e660 1612
542f5482
DJB		 1613 if (!tiocmget)
1614 return -ENOENT;
1615 spin_lock_irq(&serial->serial_lock);
1616 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1617 spin_unlock_irq(&serial->serial_lock);
1618
0bca1b91
AC		 1619 icount->cts = cnow.cts;
1620 icount->dsr = cnow.dsr;
1621 icount->rng = cnow.rng;
1622 icount->dcd = cnow.dcd;
1623 icount->rx = cnow.rx;
1624 icount->tx = cnow.tx;
1625 icount->frame = cnow.frame;
1626 icount->overrun = cnow.overrun;
1627 icount->parity = cnow.parity;
1628 icount->brk = cnow.brk;
1629 icount->buf_overrun = cnow.buf_overrun;
542f5482 1630
0bca1b91 1631 return 0;
542f5482
DJB		 1632}
1633
72dc1c09 1634
60b33c13 1635static int hso_serial_tiocmget(struct tty_struct *tty)
72dc1c09 1636{
542f5482 1637 int retval;
30409420 1638 struct hso_serial *serial = tty->driver_data;
542f5482
DJB		 1639 struct hso_tiocmget *tiocmget;
1640 u16 UART_state_bitmap;
72dc1c09
GKH		 1641
1642 /* sanity check */
1643 if (!serial) {
1644 D1("no tty structures");
1645 return -EINVAL;
1646 }
542f5482
DJB		 1647 spin_lock_irq(&serial->serial_lock);
1648 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
72dc1c09 1649 ((serial->dtr_state) ? TIOCM_DTR : 0);
542f5482
DJB		 1650 tiocmget = serial->tiocmget;
1651 if (tiocmget) {
1652
1653 UART_state_bitmap = le16_to_cpu(
1654 tiocmget->prev_UART_state_bitmap);
1655 if (UART_state_bitmap & B_RING_SIGNAL)
1656 retval |= TIOCM_RNG;
1657 if (UART_state_bitmap & B_RX_CARRIER)
1658 retval |= TIOCM_CD;
1659 if (UART_state_bitmap & B_TX_CARRIER)
1660 retval |= TIOCM_DSR;
1661 }
1662 spin_unlock_irq(&serial->serial_lock);
1663 return retval;
72dc1c09
GKH		 1664}
1665
20b9d177 1666static int hso_serial_tiocmset(struct tty_struct *tty,
72dc1c09
GKH		 1667 unsigned int set, unsigned int clear)
1668{
1669 int val = 0;
1670 unsigned long flags;
1671 int if_num;
30409420 1672 struct hso_serial *serial = tty->driver_data;
72dc1c09
GKH		 1673
1674 /* sanity check */
1675 if (!serial) {
1676 D1("no tty structures");
1677 return -EINVAL;
1678 }
0e0367e9
JD		 1679
1680 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1681 return -EINVAL;
1682
72dc1c09
GKH		 1683 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1684
1685 spin_lock_irqsave(&serial->serial_lock, flags);
1686 if (set & TIOCM_RTS)
1687 serial->rts_state = 1;
1688 if (set & TIOCM_DTR)
1689 serial->dtr_state = 1;
1690
1691 if (clear & TIOCM_RTS)
1692 serial->rts_state = 0;
1693 if (clear & TIOCM_DTR)
1694 serial->dtr_state = 0;
1695
1696 if (serial->dtr_state)
1697 val |= 0x01;
1698 if (serial->rts_state)
1699 val |= 0x02;
1700
1701 spin_unlock_irqrestore(&serial->serial_lock, flags);
1702
1703 return usb_control_msg(serial->parent->usb,
1704 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1705 0x21, val, if_num, NULL, 0,
1706 USB_CTRL_SET_TIMEOUT);
1707}
1708
6caa76b7 1709static int hso_serial_ioctl(struct tty_struct *tty,
542f5482
DJB		 1710 unsigned int cmd, unsigned long arg)
1711{
30409420 1712 struct hso_serial *serial = tty->driver_data;
542f5482
DJB		 1713 int ret = 0;
1714 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1715
1716 if (!serial)
1717 return -ENODEV;
1718 switch (cmd) {
1719 case TIOCMIWAIT:
1720 ret = hso_wait_modem_status(serial, arg);
1721 break;
542f5482
DJB		 1722 default:
1723 ret = -ENOIOCTLCMD;
1724 break;
1725 }
1726 return ret;
1727}
1728
1729
72dc1c09
GKH		 1730/* starts a transmit */
1731static void hso_kick_transmit(struct hso_serial *serial)
1732{
1733 u8 *temp;
1734 unsigned long flags;
1735 int res;
1736
1737 spin_lock_irqsave(&serial->serial_lock, flags);
1738 if (!serial->tx_buffer_count)
1739 goto out;
1740
1741 if (serial->tx_urb_used)
1742 goto out;
1743
1744 /* Wakeup USB interface if necessary */
1745 if (hso_get_activity(serial->parent) == -EAGAIN)
1746 goto out;
1747
1748 /* Switch pointers around to avoid memcpy */
1749 temp = serial->tx_buffer;
1750 serial->tx_buffer = serial->tx_data;
1751 serial->tx_data = temp;
1752 serial->tx_data_count = serial->tx_buffer_count;
1753 serial->tx_buffer_count = 0;
1754
1755 /* If temp is set, it means we switched buffers */
1756 if (temp && serial->write_data) {
1757 res = serial->write_data(serial);
1758 if (res >= 0)
1759 serial->tx_urb_used = 1;
1760 }
1761out:
1762 spin_unlock_irqrestore(&serial->serial_lock, flags);
1763}
1764
1765/* make a request (for reading and writing data to muxed serial port) */
1766static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1767 struct urb *ctrl_urb,
1768 struct usb_ctrlrequest *ctrl_req,
1769 u8 *ctrl_urb_data, u32 size)
1770{
1771 int result;
1772 int pipe;
1773
1774 /* Sanity check */
1775 if (!serial || !ctrl_urb || !ctrl_req) {
1776 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1777 return -EINVAL;
1778 }
1779
1780 /* initialize */
1781 ctrl_req->wValue = 0;
b74f62c1
DJB		 1782 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1783 ctrl_req->wLength = cpu_to_le16(size);
72dc1c09
GKH		 1784
1785 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1786 /* Reading command */
1787 ctrl_req->bRequestType = USB_DIR_IN |
1788 USB_TYPE_OPTION_VENDOR |
1789 USB_RECIP_INTERFACE;
1790 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1791 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1792 } else {
1793 /* Writing command */
1794 ctrl_req->bRequestType = USB_DIR_OUT |
1795 USB_TYPE_OPTION_VENDOR |
1796 USB_RECIP_INTERFACE;
1797 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1798 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1799 }
1800 /* syslog */
1801 D2("%s command (%02x) len: %d, port: %d",
1802 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1803 ctrl_req->bRequestType, ctrl_req->wLength, port);
1804
1805 /* Load ctrl urb */
1806 ctrl_urb->transfer_flags = 0;
1807 usb_fill_control_urb(ctrl_urb,
1808 serial->parent->usb,
1809 pipe,
1810 (u8 *) ctrl_req,
1811 ctrl_urb_data, size, ctrl_callback, serial);
1812 /* Send it on merry way */
1813 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1814 if (result) {
1815 dev_err(&ctrl_urb->dev->dev,
8a5c9c49 1816 "%s failed submit ctrl_urb %d type %d\n", __func__,
72dc1c09
GKH		 1817 result, type);
1818 return result;
1819 }
1820
1821 /* done */
1822 return size;
1823}
1824
1825/* called by intr_callback when read occurs */
1826static int hso_mux_serial_read(struct hso_serial *serial)
1827{
1828 if (!serial)
1829 return -EINVAL;
1830
1831 /* clean data */
1832 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1833 /* make the request */
1834
1835 if (serial->num_rx_urbs != 1) {
1836 dev_err(&serial->parent->interface->dev,
1837 "ERROR: mux'd reads with multiple buffers "
1838 "not possible\n");
1839 return 0;
1840 }
1841 return mux_device_request(serial,
1842 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1843 serial->parent->port_spec & HSO_PORT_MASK,
1844 serial->rx_urb[0],
1845 &serial->ctrl_req_rx,
1846 serial->rx_data[0], serial->rx_data_length);
1847}
1848
1849/* used for muxed serial port callback (muxed serial read) */
1850static void intr_callback(struct urb *urb)
1851{
1852 struct hso_shared_int *shared_int = urb->context;
1853 struct hso_serial *serial;
1854 unsigned char *port_req;
1855 int status = urb->status;
1856 int i;
1857
1858 usb_mark_last_busy(urb->dev);
1859
1860 /* sanity check */
1861 if (!shared_int)
1862 return;
1863
1864 /* status check */
1865 if (status) {
68a351c5 1866 handle_usb_error(status, __func__, NULL);
72dc1c09
GKH		 1867 return;
1868 }
1869 D4("\n--- Got intr callback 0x%02X ---", status);
1870
1871 /* what request? */
1872 port_req = urb->transfer_buffer;
1873 D4(" port_req = 0x%.2X\n", *port_req);
1874 /* loop over all muxed ports to find the one sending this */
1875 for (i = 0; i < 8; i++) {
1876 /* max 8 channels on MUX */
1877 if (*port_req & (1 << i)) {
1878 serial = get_serial_by_shared_int_and_type(shared_int,
1879 (1 << i));
1880 if (serial != NULL) {
1881 D1("Pending read interrupt on port %d\n", i);
8ef5ba63 1882 spin_lock(&serial->serial_lock);
f4763e96 1883 if (serial->rx_state == RX_IDLE &&
5ce76e77 1884 serial->port.count > 0) {
72dc1c09
GKH		 1885 /* Setup and send a ctrl req read on
1886 * port i */
f4763e96 1887 if (!serial->rx_urb_filled[0]) {
8ef5ba63
DJB		 1888 serial->rx_state = RX_SENT;
1889 hso_mux_serial_read(serial);
1890 } else
1891 serial->rx_state = RX_PENDING;
72dc1c09 1892 } else {
f4763e96
JD		 1893 D1("Already a read pending on "
1894 "port %d or port not open\n", i);
72dc1c09 1895 }
8ef5ba63 1896 spin_unlock(&serial->serial_lock);
72dc1c09
GKH		 1897 }
1898 }
1899 }
1900 /* Resubmit interrupt urb */
1901 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1902}
1903
1904/* called for writing to muxed serial port */
1905static int hso_mux_serial_write_data(struct hso_serial *serial)
1906{
1907 if (NULL == serial)
1908 return -EINVAL;
1909
1910 return mux_device_request(serial,
1911 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1912 serial->parent->port_spec & HSO_PORT_MASK,
1913 serial->tx_urb,
1914 &serial->ctrl_req_tx,
1915 serial->tx_data, serial->tx_data_count);
1916}
1917
1918/* write callback for Diag and CS port */
1919static void hso_std_serial_write_bulk_callback(struct urb *urb)
1920{
1921 struct hso_serial *serial = urb->context;
1922 int status = urb->status;
1923
1924 /* sanity check */
1925 if (!serial) {
1926 D1("serial == NULL");
1927 return;
1928 }
1929
1930 spin_lock(&serial->serial_lock);
1931 serial->tx_urb_used = 0;
1932 spin_unlock(&serial->serial_lock);
1933 if (status) {
68a351c5 1934 handle_usb_error(status, __func__, serial->parent);
72dc1c09
GKH		 1935 return;
1936 }
1937 hso_put_activity(serial->parent);
6aad04f2 1938 tty_port_tty_wakeup(&serial->port);
72dc1c09
GKH		 1939 hso_kick_transmit(serial);
1940
1941 D1(" ");
72dc1c09
GKH		 1942}
1943
1944/* called for writing diag or CS serial port */
1945static int hso_std_serial_write_data(struct hso_serial *serial)
1946{
1947 int count = serial->tx_data_count;
1948 int result;
1949
1950 usb_fill_bulk_urb(serial->tx_urb,
1951 serial->parent->usb,
1952 usb_sndbulkpipe(serial->parent->usb,
1953 serial->out_endp->
1954 bEndpointAddress & 0x7F),
1955 serial->tx_data, serial->tx_data_count,
1956 hso_std_serial_write_bulk_callback, serial);
1957
1958 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1959 if (result) {
1960 dev_warn(&serial->parent->usb->dev,
1961 "Failed to submit urb - res %d\n", result);
1962 return result;
1963 }
1964
1965 return count;
1966}
1967
1968/* callback after read or write on muxed serial port */
1969static void ctrl_callback(struct urb *urb)
1970{
1971 struct hso_serial *serial = urb->context;
1972 struct usb_ctrlrequest *req;
1973 int status = urb->status;
1974
1975 /* sanity check */
1976 if (!serial)
1977 return;
1978
1979 spin_lock(&serial->serial_lock);
1980 serial->tx_urb_used = 0;
1981 spin_unlock(&serial->serial_lock);
1982 if (status) {
68a351c5 1983 handle_usb_error(status, __func__, serial->parent);
72dc1c09
GKH		 1984 return;
1985 }
1986
1987 /* what request? */
1988 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1989 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
1990 D4("Actual length of urb = %d\n", urb->actual_length);
1991 DUMP1(urb->transfer_buffer, urb->actual_length);
1992
1993 if (req->bRequestType ==
1994 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
1995 /* response to a read command */
8ef5ba63
DJB		 1996 serial->rx_urb_filled[0] = 1;
1997 spin_lock(&serial->serial_lock);
1998 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1999 spin_unlock(&serial->serial_lock);
72dc1c09
GKH		 2000 } else {
2001 hso_put_activity(serial->parent);
6aad04f2 2002 tty_port_tty_wakeup(&serial->port);
72dc1c09
GKH		 2003 /* response to a write command */
2004 hso_kick_transmit(serial);
2005 }
2006}
2007
2008/* handle RX data for serial port */
8ef5ba63 2009static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
72dc1c09 2010{
e136e303 2011 struct tty_struct *tty;
8f9818af 2012 int count;
e136e303 2013
72dc1c09
GKH		 2014 /* Sanity check */
2015 if (urb == NULL || serial == NULL) {
2016 D1("serial = NULL");
8ef5ba63 2017 return -2;
72dc1c09
GKH		 2018 }
2019
9f8c0b08 2020 tty = tty_port_tty_get(&serial->port);
e136e303 2021
8f9818af
OS		 2022 if (tty && test_bit(TTY_THROTTLED, &tty->flags)) {
2023 tty_kref_put(tty);
2024 return -1;
2025 }
2026
72dc1c09 2027 /* Push data to tty */
2e124b4a 2028 D1("data to push to tty");
8f9818af
OS		 2029 count = tty_buffer_request_room(&serial->port, urb->actual_length);
2030 if (count >= urb->actual_length) {
2031 tty_insert_flip_string(&serial->port, urb->transfer_buffer,
2032 urb->actual_length);
2e124b4a 2033 tty_flip_buffer_push(&serial->port);
8f9818af
OS		 2034 } else {
2035 dev_warn(&serial->parent->usb->dev,
2036 "dropping data, %d bytes lost\n", urb->actual_length);
72dc1c09 2037 }
8f9818af 2038
2e124b4a
JS		 2039 tty_kref_put(tty);
2040
8f9818af
OS		 2041 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2042
2043 return 0;
72dc1c09
GKH		 2044}
2045
8ef5ba63 2046
72dc1c09
GKH		 2047/* Base driver functions */
2048
2049static void hso_log_port(struct hso_device *hso_dev)
2050{
2051 char *port_type;
2052 char port_dev[20];
2053
2054 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2055 case HSO_PORT_CONTROL:
2056 port_type = "Control";
2057 break;
2058 case HSO_PORT_APP:
2059 port_type = "Application";
2060 break;
2061 case HSO_PORT_GPS:
2062 port_type = "GPS";
2063 break;
2064 case HSO_PORT_GPS_CONTROL:
2065 port_type = "GPS control";
2066 break;
2067 case HSO_PORT_APP2:
2068 port_type = "Application2";
2069 break;
2070 case HSO_PORT_PCSC:
2071 port_type = "PCSC";
2072 break;
2073 case HSO_PORT_DIAG:
2074 port_type = "Diagnostic";
2075 break;
2076 case HSO_PORT_DIAG2:
2077 port_type = "Diagnostic2";
2078 break;
2079 case HSO_PORT_MODEM:
2080 port_type = "Modem";
2081 break;
2082 case HSO_PORT_NETWORK:
2083 port_type = "Network";
2084 break;
2085 default:
2086 port_type = "Unknown";
2087 break;
2088 }
2089 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2090 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2091 } else
2092 sprintf(port_dev, "/dev/%s%d", tty_filename,
2093 dev2ser(hso_dev)->minor);
2094
2095 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2096 port_type, port_dev);
2097}
2098
2099static int hso_start_net_device(struct hso_device *hso_dev)
2100{
2101 int i, result = 0;
2102 struct hso_net *hso_net = dev2net(hso_dev);
2103
2104 if (!hso_net)
2105 return -ENODEV;
2106
2107 /* send URBs for all read buffers */
2108 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2109
2110 /* Prep a receive URB */
2111 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2112 hso_dev->usb,
2113 usb_rcvbulkpipe(hso_dev->usb,
2114 hso_net->in_endp->
2115 bEndpointAddress & 0x7F),
2116 hso_net->mux_bulk_rx_buf_pool[i],
2117 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2118 hso_net);
2119
2120 /* Put it out there so the device can send us stuff */
2121 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2122 GFP_NOIO);
2123 if (result)
2124 dev_warn(&hso_dev->usb->dev,
2125 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2126 i, result);
2127 }
2128
2129 return result;
2130}
2131
2132static int hso_stop_net_device(struct hso_device *hso_dev)
2133{
2134 int i;
2135 struct hso_net *hso_net = dev2net(hso_dev);
2136
2137 if (!hso_net)
2138 return -ENODEV;
2139
2140 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2141 if (hso_net->mux_bulk_rx_urb_pool[i])
2142 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2143
2144 }
2145 if (hso_net->mux_bulk_tx_urb)
2146 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2147
2148 return 0;
2149}
2150
2151static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2152{
2153 int i, result = 0;
2154 struct hso_serial *serial = dev2ser(hso_dev);
2155
2156 if (!serial)
2157 return -ENODEV;
2158
2159 /* If it is not the MUX port fill in and submit a bulk urb (already
2160 * allocated in hso_serial_start) */
2161 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2162 for (i = 0; i < serial->num_rx_urbs; i++) {
2163 usb_fill_bulk_urb(serial->rx_urb[i],
2164 serial->parent->usb,
2165 usb_rcvbulkpipe(serial->parent->usb,
2166 serial->in_endp->
2167 bEndpointAddress &
2168 0x7F),
2169 serial->rx_data[i],
2170 serial->rx_data_length,
2171 hso_std_serial_read_bulk_callback,
2172 serial);
2173 result = usb_submit_urb(serial->rx_urb[i], flags);
2174 if (result) {
2175 dev_warn(&serial->parent->usb->dev,
2176 "Failed to submit urb - res %d\n",
2177 result);
2178 break;
2179 }
2180 }
2181 } else {
2182 mutex_lock(&serial->shared_int->shared_int_lock);
2183 if (!serial->shared_int->use_count) {
2184 result =
2185 hso_mux_submit_intr_urb(serial->shared_int,
2186 hso_dev->usb, flags);
2187 }
2188 serial->shared_int->use_count++;
2189 mutex_unlock(&serial->shared_int->shared_int_lock);
2190 }
542f5482
DJB		 2191 if (serial->tiocmget)
2192 tiocmget_submit_urb(serial,
2193 serial->tiocmget,
2194 serial->parent->usb);
72dc1c09
GKH		 2195 return result;
2196}
2197
2198static int hso_stop_serial_device(struct hso_device *hso_dev)
2199{
2200 int i;
2201 struct hso_serial *serial = dev2ser(hso_dev);
542f5482 2202 struct hso_tiocmget *tiocmget;
72dc1c09
GKH		 2203
2204 if (!serial)
2205 return -ENODEV;
2206
2207 for (i = 0; i < serial->num_rx_urbs; i++) {
8ef5ba63 2208 if (serial->rx_urb[i]) {
79927679
OS		 2209 usb_kill_urb(serial->rx_urb[i]);
2210 serial->rx_urb_filled[i] = 0;
8ef5ba63 2211 }
72dc1c09 2212 }
8ef5ba63 2213 serial->curr_rx_urb_idx = 0;
72dc1c09
GKH		 2214
2215 if (serial->tx_urb)
2216 usb_kill_urb(serial->tx_urb);
2217
2218 if (serial->shared_int) {
2219 mutex_lock(&serial->shared_int->shared_int_lock);
2220 if (serial->shared_int->use_count &&
2221 (--serial->shared_int->use_count == 0)) {
2222 struct urb *urb;
2223
2224 urb = serial->shared_int->shared_intr_urb;
2225 if (urb)
2226 usb_kill_urb(urb);
2227 }
2228 mutex_unlock(&serial->shared_int->shared_int_lock);
2229 }
542f5482
DJB		 2230 tiocmget = serial->tiocmget;
2231 if (tiocmget) {
2232 wake_up_interruptible(&tiocmget->waitq);
2233 usb_kill_urb(tiocmget->urb);
2234 }
72dc1c09
GKH		 2235
2236 return 0;
2237}
2238
2239static void hso_serial_common_free(struct hso_serial *serial)
2240{
2241 int i;
2242
2243 if (serial->parent->dev)
2244 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2245
2246 tty_unregister_device(tty_drv, serial->minor);
2247
2248 for (i = 0; i < serial->num_rx_urbs; i++) {
2249 /* unlink and free RX URB */
2250 usb_free_urb(serial->rx_urb[i]);
2251 /* free the RX buffer */
2252 kfree(serial->rx_data[i]);
2253 }
2254
2255 /* unlink and free TX URB */
2256 usb_free_urb(serial->tx_urb);
295fc56f 2257 kfree(serial->tx_buffer);
72dc1c09 2258 kfree(serial->tx_data);
191c5f10 2259 tty_port_destroy(&serial->port);
72dc1c09
GKH		 2260}
2261
2262static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2263 int rx_size, int tx_size)
2264{
2265 struct device *dev;
2266 int minor;
2267 int i;
2268
191c5f10
JS		 2269 tty_port_init(&serial->port);
2270
72dc1c09
GKH		 2271 minor = get_free_serial_index();
2272 if (minor < 0)
2273 goto exit;
2274
2275 /* register our minor number */
734cc178
JS		 2276 serial->parent->dev = tty_port_register_device(&serial->port, tty_drv,
2277 minor, &serial->parent->interface->dev);
72dc1c09 2278 dev = serial->parent->dev;
1aec5bdf 2279 dev_set_drvdata(dev, serial->parent);
72dc1c09
GKH		 2280 i = device_create_file(dev, &dev_attr_hsotype);
2281
2282 /* fill in specific data for later use */
2283 serial->minor = minor;
2284 serial->magic = HSO_SERIAL_MAGIC;
2285 spin_lock_init(&serial->serial_lock);
2286 serial->num_rx_urbs = num_urbs;
2287
2288 /* RX, allocate urb and initialize */
2289
2290 /* prepare our RX buffer */
2291 serial->rx_data_length = rx_size;
2292 for (i = 0; i < serial->num_rx_urbs; i++) {
2293 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2294 if (!serial->rx_urb[i]) {
2295 dev_err(dev, "Could not allocate urb?\n");
2296 goto exit;
2297 }
2298 serial->rx_urb[i]->transfer_buffer = NULL;
2299 serial->rx_urb[i]->transfer_buffer_length = 0;
2300 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2301 GFP_KERNEL);
38673c82 2302 if (!serial->rx_data[i])
72dc1c09 2303 goto exit;
72dc1c09
GKH		 2304 }
2305
2306 /* TX, allocate urb and initialize */
2307 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2308 if (!serial->tx_urb) {
2309 dev_err(dev, "Could not allocate urb?\n");
2310 goto exit;
2311 }
2312 serial->tx_urb->transfer_buffer = NULL;
2313 serial->tx_urb->transfer_buffer_length = 0;
2314 /* prepare our TX buffer */
2315 serial->tx_data_count = 0;
2316 serial->tx_buffer_count = 0;
2317 serial->tx_data_length = tx_size;
2318 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
38673c82 2319 if (!serial->tx_data)
72dc1c09 2320 goto exit;
38673c82 2321
72dc1c09 2322 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
38673c82 2323 if (!serial->tx_buffer)
72dc1c09 2324 goto exit;
72dc1c09
GKH		 2325
2326 return 0;
2327exit:
2328 hso_serial_common_free(serial);
2329 return -1;
2330}
2331
72dc1c09
GKH		 2332/* Creates a general hso device */
2333static struct hso_device *hso_create_device(struct usb_interface *intf,
2334 int port_spec)
2335{
2336 struct hso_device *hso_dev;
2337
2338 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2339 if (!hso_dev)
2340 return NULL;
2341
2342 hso_dev->port_spec = port_spec;
2343 hso_dev->usb = interface_to_usbdev(intf);
2344 hso_dev->interface = intf;
2345 kref_init(&hso_dev->ref);
ab153d84
DM		 2346 mutex_init(&hso_dev->mutex);
2347
72dc1c09
GKH		 2348 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2349 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
68a351c5 2350 INIT_WORK(&hso_dev->reset_device, reset_device);
72dc1c09
GKH		 2351
2352 return hso_dev;
2353}
2354
2355/* Removes a network device in the network device table */
2356static int remove_net_device(struct hso_device *hso_dev)
2357{
2358 int i;
2359
2360 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2361 if (network_table[i] == hso_dev) {
2362 network_table[i] = NULL;
2363 break;
2364 }
2365 }
2366 if (i == HSO_MAX_NET_DEVICES)
2367 return -1;
2368 return 0;
2369}
2370
2371/* Frees our network device */
2372static void hso_free_net_device(struct hso_device *hso_dev)
2373{
2374 int i;
2375 struct hso_net *hso_net = dev2net(hso_dev);
2376
2377 if (!hso_net)
2378 return;
2379
3b7d2b31
JD		 2380 remove_net_device(hso_net->parent);
2381
5e2cd082 2382 if (hso_net->net)
3b7d2b31 2383 unregister_netdev(hso_net->net);
3b7d2b31 2384
72dc1c09
GKH		 2385 /* start freeing */
2386 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2387 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2388 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
3b7d2b31 2389 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
72dc1c09
GKH		 2390 }
2391 usb_free_urb(hso_net->mux_bulk_tx_urb);
2392 kfree(hso_net->mux_bulk_tx_buf);
3b7d2b31 2393 hso_net->mux_bulk_tx_buf = NULL;
ab153d84 2394
5e2cd082
GK		 2395 if (hso_net->net)
2396 free_netdev(hso_net->net);
2397
e44578ea 2398 kfree(hso_dev);
72dc1c09
GKH		 2399}
2400
c266cb4e
SH		 2401static const struct net_device_ops hso_netdev_ops = {
2402 .ndo_open = hso_net_open,
2403 .ndo_stop = hso_net_close,
2404 .ndo_start_xmit = hso_net_start_xmit,
2405 .ndo_tx_timeout = hso_net_tx_timeout,
2406};
2407
72dc1c09
GKH		 2408/* initialize the network interface */
2409static void hso_net_init(struct net_device *net)
2410{
2411 struct hso_net *hso_net = netdev_priv(net);
2412
2413 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2414
2415 /* fill in the other fields */
c266cb4e 2416 net->netdev_ops = &hso_netdev_ops;
72dc1c09
GKH		 2417 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2418 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2419 net->type = ARPHRD_NONE;
2420 net->mtu = DEFAULT_MTU - 14;
2421 net->tx_queue_len = 10;
7ad24ea4 2422 net->ethtool_ops = &ops;
72dc1c09
GKH		 2423
2424 /* and initialize the semaphore */
2425 spin_lock_init(&hso_net->net_lock);
2426}
2427
2428/* Adds a network device in the network device table */
2429static int add_net_device(struct hso_device *hso_dev)
2430{
2431 int i;
2432
2433 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2434 if (network_table[i] == NULL) {
2435 network_table[i] = hso_dev;
2436 break;
2437 }
2438 }
2439 if (i == HSO_MAX_NET_DEVICES)
2440 return -1;
2441 return 0;
2442}
2443
19d337df 2444static int hso_rfkill_set_block(void *data, bool blocked)
72dc1c09
GKH		 2445{
2446 struct hso_device *hso_dev = data;
19d337df 2447 int enabled = !blocked;
72dc1c09
GKH		 2448 int rv;
2449
ab153d84 2450 mutex_lock(&hso_dev->mutex);
72dc1c09
GKH		 2451 if (hso_dev->usb_gone)
2452 rv = 0;
2453 else
2454 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2455 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2456 USB_CTRL_SET_TIMEOUT);
ab153d84 2457 mutex_unlock(&hso_dev->mutex);
72dc1c09
GKH		 2458 return rv;
2459}
2460
19d337df
JB		 2461static const struct rfkill_ops hso_rfkill_ops = {
2462 .set_block = hso_rfkill_set_block,
2463};
2464
72dc1c09
GKH		 2465/* Creates and sets up everything for rfkill */
2466static void hso_create_rfkill(struct hso_device *hso_dev,
2467 struct usb_interface *interface)
2468{
2469 struct hso_net *hso_net = dev2net(hso_dev);
939a9516 2470 struct device *dev = &hso_net->net->dev;
72dc1c09 2471
2e6d01ff 2472 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d",
72dc1c09 2473 interface->altsetting->desc.bInterfaceNumber);
19d337df 2474
2e6d01ff 2475 hso_net->rfkill = rfkill_alloc(hso_net->name,
19d337df
JB		 2476 &interface_to_usbdev(interface)->dev,
2477 RFKILL_TYPE_WWAN,
2478 &hso_rfkill_ops, hso_dev);
2479 if (!hso_net->rfkill) {
2480 dev_err(dev, "%s - Out of memory\n", __func__);
19d337df
JB		 2481 return;
2482 }
72dc1c09 2483 if (rfkill_register(hso_net->rfkill) < 0) {
19d337df 2484 rfkill_destroy(hso_net->rfkill);
939a9516
JM		 2485 hso_net->rfkill = NULL;
2486 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
72dc1c09
GKH		 2487 return;
2488 }
2489}
2490
384912ed
MH		 2491static struct device_type hso_type = {
2492 .name = "wwan",
2493};
2494
72dc1c09 2495/* Creates our network device */
0de8ca59
JD		 2496static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2497 int port_spec)
72dc1c09
GKH		 2498{
2499 int result, i;
2500 struct net_device *net;
2501 struct hso_net *hso_net;
2502 struct hso_device *hso_dev;
2503
0de8ca59 2504 hso_dev = hso_create_device(interface, port_spec);
72dc1c09
GKH		 2505 if (!hso_dev)
2506 return NULL;
2507
2508 /* allocate our network device, then we can put in our private data */
2509 /* call hso_net_init to do the basic initialization */
c835a677
TG		 2510 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN,
2511 hso_net_init);
72dc1c09
GKH		 2512 if (!net) {
2513 dev_err(&interface->dev, "Unable to create ethernet device\n");
2514 goto exit;
2515 }
2516
2517 hso_net = netdev_priv(net);
2518
2519 hso_dev->port_data.dev_net = hso_net;
2520 hso_net->net = net;
2521 hso_net->parent = hso_dev;
2522
2523 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2524 USB_DIR_IN);
2525 if (!hso_net->in_endp) {
2526 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2527 goto exit;
2528 }
2529 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2530 USB_DIR_OUT);
2531 if (!hso_net->out_endp) {
2532 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2533 goto exit;
2534 }
2535 SET_NETDEV_DEV(net, &interface->dev);
384912ed 2536 SET_NETDEV_DEVTYPE(net, &hso_type);
72dc1c09
GKH		 2537
2538 /* registering our net device */
2539 result = register_netdev(net);
2540 if (result) {
2541 dev_err(&interface->dev, "Failed to register device\n");
2542 goto exit;
2543 }
2544
2545 /* start allocating */
2546 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2547 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2548 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2549 dev_err(&interface->dev, "Could not allocate rx urb\n");
2550 goto exit;
2551 }
2552 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2553 GFP_KERNEL);
38673c82 2554 if (!hso_net->mux_bulk_rx_buf_pool[i])
72dc1c09 2555 goto exit;
72dc1c09
GKH		 2556 }
2557 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2558 if (!hso_net->mux_bulk_tx_urb) {
2559 dev_err(&interface->dev, "Could not allocate tx urb\n");
2560 goto exit;
2561 }
2562 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
38673c82 2563 if (!hso_net->mux_bulk_tx_buf)
72dc1c09 2564 goto exit;
72dc1c09
GKH		 2565
2566 add_net_device(hso_dev);
2567
2568 hso_log_port(hso_dev);
2569
2570 hso_create_rfkill(hso_dev, interface);
2571
2572 return hso_dev;
2573exit:
2574 hso_free_net_device(hso_dev);
2575 return NULL;
2576}
2577
542f5482
DJB		 2578static void hso_free_tiomget(struct hso_serial *serial)
2579{
5b89db0e
JJ		 2580 struct hso_tiocmget *tiocmget;
2581 if (!serial)
2582 return;
2583 tiocmget = serial->tiocmget;
542f5482 2584 if (tiocmget) {
5b89db0e
JJ		 2585 usb_free_urb(tiocmget->urb);
2586 tiocmget->urb = NULL;
542f5482 2587 serial->tiocmget = NULL;
3b7d2b31 2588 kfree(tiocmget);
542f5482
DJB		 2589 }
2590}
2591
72dc1c09
GKH		 2592/* Frees an AT channel ( goes for both mux and non-mux ) */
2593static void hso_free_serial_device(struct hso_device *hso_dev)
2594{
2595 struct hso_serial *serial = dev2ser(hso_dev);
2596
2597 if (!serial)
2598 return;
2599 set_serial_by_index(serial->minor, NULL);
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:
2689 hso_serial_common_free(serial);
72dc1c09 2690exit:
542f5482 2691 hso_free_tiomget(serial);
72dc1c09 2692 kfree(serial);
e44578ea 2693 kfree(hso_dev);
72dc1c09
GKH		 2694 return NULL;
2695}
2696
2697/* Creates a multiplexed AT channel */
2698static
2699struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2700 int port,
2701 struct hso_shared_int *mux)
2702{
2703 struct hso_device *hso_dev;
2704 struct hso_serial *serial;
2705 int port_spec;
2706
2707 port_spec = HSO_INTF_MUX;
2708 port_spec &= ~HSO_PORT_MASK;
2709
2710 port_spec |= hso_mux_to_port(port);
2711 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2712 return NULL;
2713
2714 hso_dev = hso_create_device(interface, port_spec);
2715 if (!hso_dev)
2716 return NULL;
2717
2718 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2719 if (!serial)
2720 goto exit;
2721
2722 hso_dev->port_data.dev_serial = serial;
2723 serial->parent = hso_dev;
2724
2725 if (hso_serial_common_create
2726 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2727 goto exit;
2728
2729 serial->tx_data_length--;
2730 serial->write_data = hso_mux_serial_write_data;
2731
2732 serial->shared_int = mux;
2733 mutex_lock(&serial->shared_int->shared_int_lock);
2734 serial->shared_int->ref_count++;
2735 mutex_unlock(&serial->shared_int->shared_int_lock);
2736
2737 /* and record this serial */
2738 set_serial_by_index(serial->minor, serial);
2739
2740 /* setup the proc dirs and files if needed */
2741 hso_log_port(hso_dev);
2742
2743 /* done, return it */
2744 return hso_dev;
2745
2746exit:
2747 if (serial) {
2748 tty_unregister_device(tty_drv, serial->minor);
2749 kfree(serial);
2750 }
91ecee68 2751 kfree(hso_dev);
72dc1c09
GKH		 2752 return NULL;
2753
2754}
2755
2756static void hso_free_shared_int(struct hso_shared_int *mux)
2757{
2758 usb_free_urb(mux->shared_intr_urb);
2759 kfree(mux->shared_intr_buf);
2760 mutex_unlock(&mux->shared_int_lock);
2761 kfree(mux);
2762}
2763
2764static
2765struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2766{
2767 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2768
2769 if (!mux)
2770 return NULL;
2771
2772 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2773 USB_DIR_IN);
2774 if (!mux->intr_endp) {
2775 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2776 goto exit;
2777 }
2778
2779 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2780 if (!mux->shared_intr_urb) {
8a5c9c49 2781 dev_err(&interface->dev, "Could not allocate intr urb?\n");
72dc1c09
GKH		 2782 goto exit;
2783 }
d9ced80d
JD		 2784 mux->shared_intr_buf =
2785 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2786 GFP_KERNEL);
38673c82 2787 if (!mux->shared_intr_buf)
72dc1c09 2788 goto exit;
72dc1c09
GKH		 2789
2790 mutex_init(&mux->shared_int_lock);
2791
2792 return mux;
2793
2794exit:
2795 kfree(mux->shared_intr_buf);
2796 usb_free_urb(mux->shared_intr_urb);
2797 kfree(mux);
2798 return NULL;
2799}
2800
2801/* Gets the port spec for a certain interface */
2802static int hso_get_config_data(struct usb_interface *interface)
2803{
2804 struct usb_device *usbdev = interface_to_usbdev(interface);
e75dc677 2805 u8 *config_data = kmalloc(17, GFP_KERNEL);
72dc1c09
GKH		 2806 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2807 s32 result;
2808
e75dc677
DG		 2809 if (!config_data)
2810 return -ENOMEM;
72dc1c09
GKH		 2811 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2812 0x86, 0xC0, 0, 0, config_data, 17,
2813 USB_CTRL_SET_TIMEOUT) != 0x11) {
e75dc677 2814 kfree(config_data);
72dc1c09
GKH		 2815 return -EIO;
2816 }
2817
2818 switch (config_data[if_num]) {
2819 case 0x0:
2820 result = 0;
2821 break;
2822 case 0x1:
2823 result = HSO_PORT_DIAG;
2824 break;
2825 case 0x2:
2826 result = HSO_PORT_GPS;
2827 break;
2828 case 0x3:
2829 result = HSO_PORT_GPS_CONTROL;
2830 break;
2831 case 0x4:
2832 result = HSO_PORT_APP;
2833 break;
2834 case 0x5:
2835 result = HSO_PORT_APP2;
2836 break;
2837 case 0x6:
2838 result = HSO_PORT_CONTROL;
2839 break;
2840 case 0x7:
2841 result = HSO_PORT_NETWORK;
2842 break;
2843 case 0x8:
2844 result = HSO_PORT_MODEM;
2845 break;
2846 case 0x9:
2847 result = HSO_PORT_MSD;
2848 break;
2849 case 0xa:
2850 result = HSO_PORT_PCSC;
2851 break;
2852 case 0xb:
2853 result = HSO_PORT_VOICE;
2854 break;
2855 default:
2856 result = 0;
2857 }
2858
2859 if (result)
2860 result |= HSO_INTF_BULK;
2861
2862 if (config_data[16] & 0x1)
2863 result |= HSO_INFO_CRC_BUG;
2864
e75dc677 2865 kfree(config_data);
72dc1c09
GKH		 2866 return result;
2867}
2868
2869/* called once for each interface upon device insertion */
2870static int hso_probe(struct usb_interface *interface,
2871 const struct usb_device_id *id)
2872{
2873 int mux, i, if_num, port_spec;
2874 unsigned char port_mask;
2875 struct hso_device *hso_dev = NULL;
2876 struct hso_shared_int *shared_int;
2877 struct hso_device *tmp_dev = NULL;
2878
35e57e1b
DG		 2879 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2880 dev_err(&interface->dev, "Not our interface\n");
2881 return -ENODEV;
2882 }
2883
72dc1c09
GKH		 2884 if_num = interface->altsetting->desc.bInterfaceNumber;
2885
2886 /* Get the interface/port specification from either driver_info or from
2887 * the device itself */
2888 if (id->driver_info)
2889 port_spec = ((u32 *)(id->driver_info))[if_num];
2890 else
2891 port_spec = hso_get_config_data(interface);
2892
72dc1c09
GKH		 2893 /* Check if we need to switch to alt interfaces prior to port
2894 * configuration */
2895 if (interface->num_altsetting > 1)
2896 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2897 interface->needs_remote_wakeup = 1;
2898
2899 /* Allocate new hso device(s) */
2900 switch (port_spec & HSO_INTF_MASK) {
2901 case HSO_INTF_MUX:
2902 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2903 /* Create the network device */
2904 if (!disable_net) {
0de8ca59
JD		 2905 hso_dev = hso_create_net_device(interface,
2906 port_spec);
72dc1c09
GKH		 2907 if (!hso_dev)
2908 goto exit;
2909 tmp_dev = hso_dev;
2910 }
2911 }
2912
2913 if (hso_get_mux_ports(interface, &port_mask))
2914 /* TODO: de-allocate everything */
2915 goto exit;
2916
2917 shared_int = hso_create_shared_int(interface);
2918 if (!shared_int)
2919 goto exit;
2920
2921 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2922 if (port_mask & i) {
2923 hso_dev = hso_create_mux_serial_device(
2924 interface, i, shared_int);
2925 if (!hso_dev)
2926 goto exit;
2927 }
2928 }
2929
2930 if (tmp_dev)
2931 hso_dev = tmp_dev;
2932 break;
2933
2934 case HSO_INTF_BULK:
2935 /* It's a regular bulk interface */
8e65c0ec
FA		 2936 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2937 if (!disable_net)
2938 hso_dev =
2939 hso_create_net_device(interface, port_spec);
2940 } else {
72dc1c09
GKH		 2941 hso_dev =
2942 hso_create_bulk_serial_device(interface, port_spec);
8e65c0ec 2943 }
72dc1c09
GKH		 2944 if (!hso_dev)
2945 goto exit;
2946 break;
2947 default:
2948 goto exit;
2949 }
2950
72dc1c09
GKH		 2951 /* save our data pointer in this device */
2952 usb_set_intfdata(interface, hso_dev);
2953
2954 /* done */
2955 return 0;
2956exit:
2957 hso_free_interface(interface);
2958 return -ENODEV;
2959}
2960
2961/* device removed, cleaning up */
2962static void hso_disconnect(struct usb_interface *interface)
2963{
2964 hso_free_interface(interface);
2965
2966 /* remove reference of our private data */
2967 usb_set_intfdata(interface, NULL);
72dc1c09
GKH		 2968}
2969
2970static void async_get_intf(struct work_struct *data)
2971{
2972 struct hso_device *hso_dev =
2973 container_of(data, struct hso_device, async_get_intf);
2974 usb_autopm_get_interface(hso_dev->interface);
2975}
2976
2977static void async_put_intf(struct work_struct *data)
2978{
2979 struct hso_device *hso_dev =
2980 container_of(data, struct hso_device, async_put_intf);
2981 usb_autopm_put_interface(hso_dev->interface);
2982}
2983
2984static int hso_get_activity(struct hso_device *hso_dev)
2985{
2986 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2987 if (!hso_dev->is_active) {
2988 hso_dev->is_active = 1;
2989 schedule_work(&hso_dev->async_get_intf);
2990 }
2991 }
2992
2993 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
2994 return -EAGAIN;
2995
2996 usb_mark_last_busy(hso_dev->usb);
2997
2998 return 0;
2999}
3000
3001static int hso_put_activity(struct hso_device *hso_dev)
3002{
3003 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3004 if (hso_dev->is_active) {
3005 hso_dev->is_active = 0;
3006 schedule_work(&hso_dev->async_put_intf);
3007 return -EAGAIN;
3008 }
3009 }
3010 hso_dev->is_active = 0;
3011 return 0;
3012}
3013
3014/* called by kernel when we need to suspend device */
3015static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3016{
3017 int i, result;
3018
3019 /* Stop all serial ports */
3020 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3021 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3022 result = hso_stop_serial_device(serial_table[i]);
3023 if (result)
3024 goto out;
3025 }
3026 }
3027
3028 /* Stop all network ports */
3029 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3030 if (network_table[i] &&
3031 (network_table[i]->interface == iface)) {
3032 result = hso_stop_net_device(network_table[i]);
3033 if (result)
3034 goto out;
3035 }
3036 }
3037
3038out:
3039 return 0;
3040}
3041
3042/* called by kernel when we need to resume device */
3043static int hso_resume(struct usb_interface *iface)
3044{
3045 int i, result = 0;
3046 struct hso_net *hso_net;
3047
3048 /* Start all serial ports */
3049 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3050 if (serial_table[i] && (serial_table[i]->interface == iface)) {
5ce76e77 3051 if (dev2ser(serial_table[i])->port.count) {
72dc1c09
GKH		 3052 result =
3053 hso_start_serial_device(serial_table[i], GFP_NOIO);
3054 hso_kick_transmit(dev2ser(serial_table[i]));
3055 if (result)
3056 goto out;
3057 }
3058 }
3059 }
3060
3061 /* Start all network ports */
3062 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3063 if (network_table[i] &&
3064 (network_table[i]->interface == iface)) {
3065 hso_net = dev2net(network_table[i]);
89930b7b
DJB		 3066 if (hso_net->flags & IFF_UP) {
3067 /* First transmit any lingering data,
3068 then restart the device. */
3069 if (hso_net->skb_tx_buf) {
3070 dev_dbg(&iface->dev,
3071 "Transmitting"
3072 " lingering data\n");
3073 hso_net_start_xmit(hso_net->skb_tx_buf,
3074 hso_net->net);
3075 hso_net->skb_tx_buf = NULL;
3076 }
3077 result = hso_start_net_device(network_table[i]);
3078 if (result)
3079 goto out;
72dc1c09 3080 }
72dc1c09
GKH		 3081 }
3082 }
3083
3084out:
3085 return result;
3086}
3087
68a351c5
JD		 3088static void reset_device(struct work_struct *data)
3089{
3090 struct hso_device *hso_dev =
3091 container_of(data, struct hso_device, reset_device);
3092 struct usb_device *usb = hso_dev->usb;
3093 int result;
3094
3095 if (hso_dev->usb_gone) {
3096 D1("No reset during disconnect\n");
3097 } else {
3098 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3099 if (result < 0)
3100 D1("unable to lock device for reset: %d\n", result);
3101 else {
3102 usb_reset_device(usb);
3103 usb_unlock_device(usb);
3104 }
3105 }
3106}
3107
72dc1c09
GKH		 3108static void hso_serial_ref_free(struct kref *ref)
3109{
3110 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3111
3112 hso_free_serial_device(hso_dev);
3113}
3114
3115static void hso_free_interface(struct usb_interface *interface)
3116{
3117 struct hso_serial *hso_dev;
3118 int i;
3119
3120 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
8e95a202
JP		 3121 if (serial_table[i] &&
3122 (serial_table[i]->interface == interface)) {
72dc1c09 3123 hso_dev = dev2ser(serial_table[i]);
aa27a094 3124 tty_port_tty_hangup(&hso_dev->port, false);
ab153d84 3125 mutex_lock(&hso_dev->parent->mutex);
72dc1c09 3126 hso_dev->parent->usb_gone = 1;
ab153d84
DM		 3127 mutex_unlock(&hso_dev->parent->mutex);
3128 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
72dc1c09
GKH		 3129 }
3130 }
3131
3132 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
8e95a202
JP		 3133 if (network_table[i] &&
3134 (network_table[i]->interface == interface)) {
72dc1c09
GKH		 3135 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3136 /* hso_stop_net_device doesn't stop the net queue since
3137 * traffic needs to start it again when suspended */
3138 netif_stop_queue(dev2net(network_table[i])->net);
3139 hso_stop_net_device(network_table[i]);
3140 cancel_work_sync(&network_table[i]->async_put_intf);
3141 cancel_work_sync(&network_table[i]->async_get_intf);
19d337df 3142 if (rfk) {
72dc1c09 3143 rfkill_unregister(rfk);
19d337df
JB		 3144 rfkill_destroy(rfk);
3145 }
72dc1c09
GKH		 3146 hso_free_net_device(network_table[i]);
3147 }
3148 }
3149}
3150
3151/* Helper functions */
3152
3153/* Get the endpoint ! */
3154static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3155 int type, int dir)
3156{
3157 int i;
3158 struct usb_host_interface *iface = intf->cur_altsetting;
3159 struct usb_endpoint_descriptor *endp;
3160
3161 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3162 endp = &iface->endpoint[i].desc;
3163 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
f201a8a4 3164 (usb_endpoint_type(endp) == type))
72dc1c09
GKH		 3165 return endp;
3166 }
3167
3168 return NULL;
3169}
3170
3171/* Get the byte that describes which ports are enabled */
3172static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3173{
3174 int i;
3175 struct usb_host_interface *iface = intf->cur_altsetting;
3176
3177 if (iface->extralen == 3) {
3178 *ports = iface->extra[2];
3179 return 0;
3180 }
3181
3182 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3183 if (iface->endpoint[i].extralen == 3) {
3184 *ports = iface->endpoint[i].extra[2];
3185 return 0;
3186 }
3187 }
3188
3189 return -1;
3190}
3191
3192/* interrupt urb needs to be submitted, used for serial read of muxed port */
3193static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3194 struct usb_device *usb, gfp_t gfp)
3195{
3196 int result;
3197
3198 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3199 usb_rcvintpipe(usb,
3200 shared_int->intr_endp->bEndpointAddress & 0x7F),
3201 shared_int->shared_intr_buf,
d9ced80d 3202 1,
72dc1c09
GKH		 3203 intr_callback, shared_int,
3204 shared_int->intr_endp->bInterval);
3205
3206 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3207 if (result)
8a5c9c49 3208 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
72dc1c09
GKH		 3209 result);
3210
3211 return result;
3212}
3213
3214/* operations setup of the serial interface */
6c59f569 3215static const struct tty_operations hso_serial_ops = {
72dc1c09
GKH		 3216 .open = hso_serial_open,
3217 .close = hso_serial_close,
3218 .write = hso_serial_write,
3219 .write_room = hso_serial_write_room,
29bd3bc1 3220 .cleanup = hso_serial_cleanup,
542f5482 3221 .ioctl = hso_serial_ioctl,
72dc1c09
GKH		 3222 .set_termios = hso_serial_set_termios,
3223 .chars_in_buffer = hso_serial_chars_in_buffer,
3224 .tiocmget = hso_serial_tiocmget,
3225 .tiocmset = hso_serial_tiocmset,
0bca1b91 3226 .get_icount = hso_get_count,
8ef5ba63 3227 .unthrottle = hso_unthrottle
72dc1c09
GKH		 3228};
3229
3230static struct usb_driver hso_driver = {
3231 .name = driver_name,
3232 .probe = hso_probe,
3233 .disconnect = hso_disconnect,
3234 .id_table = hso_ids,
3235 .suspend = hso_suspend,
3236 .resume = hso_resume,
9c8f92ae 3237 .reset_resume = hso_resume,
72dc1c09 3238 .supports_autosuspend = 1,
e1f12eb6 3239 .disable_hub_initiated_lpm = 1,
72dc1c09
GKH		 3240};
3241
3242static int __init hso_init(void)
3243{
3244 int i;
3245 int result;
3246
3247 /* put it in the log */
3248 printk(KERN_INFO "hso: %s\n", version);
3249
3250 /* Initialise the serial table semaphore and table */
3251 spin_lock_init(&serial_table_lock);
3252 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3253 serial_table[i] = NULL;
3254
3255 /* allocate our driver using the proper amount of supported minors */
3256 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3257 if (!tty_drv)
3258 return -ENOMEM;
3259
3260 /* fill in all needed values */
72dc1c09
GKH		 3261 tty_drv->driver_name = driver_name;
3262 tty_drv->name = tty_filename;
3263
3264 /* if major number is provided as parameter, use that one */
3265 if (tty_major)
3266 tty_drv->major = tty_major;
3267
3268 tty_drv->minor_start = 0;
72dc1c09
GKH		 3269 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3270 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3271 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3272 tty_drv->init_termios = tty_std_termios;
ac9720c3 3273 hso_init_termios(&tty_drv->init_termios);
72dc1c09
GKH		 3274 tty_set_operations(tty_drv, &hso_serial_ops);
3275
3276 /* register the tty driver */
3277 result = tty_register_driver(tty_drv);
3278 if (result) {
3279 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3280 __func__, result);
d230788f 3281 goto err_free_tty;
72dc1c09
GKH		 3282 }
3283
3284 /* register this module as an usb driver */
3285 result = usb_register(&hso_driver);
3286 if (result) {
3287 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3288 result);
d230788f 3289 goto err_unreg_tty;
72dc1c09
GKH		 3290 }
3291
3292 /* done */
3293 return 0;
d230788f
JS		 3294err_unreg_tty:
3295 tty_unregister_driver(tty_drv);
3296err_free_tty:
3297 put_tty_driver(tty_drv);
3298 return result;
72dc1c09
GKH		 3299}
3300
3301static void __exit hso_exit(void)
3302{
3303 printk(KERN_INFO "hso: unloaded\n");
3304
3305 tty_unregister_driver(tty_drv);
d230788f 3306 put_tty_driver(tty_drv);
72dc1c09
GKH		 3307 /* deregister the usb driver */
3308 usb_deregister(&hso_driver);
3309}
3310
3311/* Module definitions */
3312module_init(hso_init);
3313module_exit(hso_exit);
3314
3315MODULE_AUTHOR(MOD_AUTHOR);
3316MODULE_DESCRIPTION(MOD_DESCRIPTION);
3317MODULE_LICENSE(MOD_LICENSE);
72dc1c09
GKH		 3318
3319/* change the debug level (eg: insmod hso.ko debug=0x04) */
3320MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3321module_param(debug, int, S_IRUGO | S_IWUSR);
3322
3323/* set the major tty number (eg: insmod hso.ko tty_major=245) */
3324MODULE_PARM_DESC(tty_major, "Set the major tty number");
3325module_param(tty_major, int, S_IRUGO | S_IWUSR);
3326
3327/* disable network interface (eg: insmod hso.ko disable_net=1) */
3328MODULE_PARM_DESC(disable_net, "Disable the network interface");
3329module_param(disable_net, int, S_IRUGO | S_IWUSR);
Linux kernel - Deliverables
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