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Merge branch 'fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6
[net-next-2.6.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>
61#include <linux/timer.h>
62#include <linux/tty.h>
63#include <linux/tty_driver.h>
64#include <linux/tty_flip.h>
65#include <linux/kmod.h>
66#include <linux/rfkill.h>
67#include <linux/ip.h>
68#include <linux/uaccess.h>
69#include <linux/usb/cdc.h>
70#include <net/arp.h>
71#include <asm/byteorder.h>
542f5482
DJB		 72#include <linux/serial_core.h>
73#include <linux/serial.h>
72dc1c09
GKH		 74
75
76#define DRIVER_VERSION "1.2"
77#define MOD_AUTHOR "Option Wireless"
78#define MOD_DESCRIPTION "USB High Speed Option driver"
79#define MOD_LICENSE "GPL"
80
81#define HSO_MAX_NET_DEVICES 10
82#define HSO__MAX_MTU 2048
83#define DEFAULT_MTU 1500
84#define DEFAULT_MRU 1500
85
86#define CTRL_URB_RX_SIZE 1024
87#define CTRL_URB_TX_SIZE 64
88
89#define BULK_URB_RX_SIZE 4096
90#define BULK_URB_TX_SIZE 8192
91
92#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
93#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
94#define MUX_BULK_RX_BUF_COUNT 4
95#define USB_TYPE_OPTION_VENDOR 0x20
96
97/* These definitions are used with the struct hso_net flags element */
98/* - use *_bit operations on it. (bit indices not values.) */
99#define HSO_NET_RUNNING 0
100
101#define HSO_NET_TX_TIMEOUT (HZ*10)
102
72dc1c09
GKH		 103#define HSO_SERIAL_MAGIC 0x48534f31
104
105/* Number of ttys to handle */
106#define HSO_SERIAL_TTY_MINORS 256
107
108#define MAX_RX_URBS 2
109
0235f641
GKH		 110static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
111{
112 if (tty)
113 return tty->driver_data;
114 return NULL;
115}
72dc1c09
GKH		 116
117/*****************************************************************************/
118/* Debugging functions */
119/*****************************************************************************/
120#define D__(lvl_, fmt, arg...) \
121 do { \
122 printk(lvl_ "[%d:%s]: " fmt "\n", \
123 __LINE__, __func__, ## arg); \
124 } while (0)
125
126#define D_(lvl, args...) \
127 do { \
128 if (lvl & debug) \
129 D__(KERN_INFO, args); \
130 } while (0)
131
132#define D1(args...) D_(0x01, ##args)
133#define D2(args...) D_(0x02, ##args)
134#define D3(args...) D_(0x04, ##args)
135#define D4(args...) D_(0x08, ##args)
136#define D5(args...) D_(0x10, ##args)
137
138/*****************************************************************************/
139/* Enumerators */
140/*****************************************************************************/
141enum pkt_parse_state {
142 WAIT_IP,
143 WAIT_DATA,
144 WAIT_SYNC
145};
146
147/*****************************************************************************/
148/* Structs */
149/*****************************************************************************/
150
151struct hso_shared_int {
152 struct usb_endpoint_descriptor *intr_endp;
153 void *shared_intr_buf;
154 struct urb *shared_intr_urb;
155 struct usb_device *usb;
156 int use_count;
157 int ref_count;
158 struct mutex shared_int_lock;
159};
160
161struct hso_net {
162 struct hso_device *parent;
163 struct net_device *net;
164 struct rfkill *rfkill;
165
166 struct usb_endpoint_descriptor *in_endp;
167 struct usb_endpoint_descriptor *out_endp;
168
169 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
170 struct urb *mux_bulk_tx_urb;
171 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
172 void *mux_bulk_tx_buf;
173
174 struct sk_buff *skb_rx_buf;
175 struct sk_buff *skb_tx_buf;
176
177 enum pkt_parse_state rx_parse_state;
178 spinlock_t net_lock;
179
180 unsigned short rx_buf_size;
181 unsigned short rx_buf_missing;
182 struct iphdr rx_ip_hdr;
183
184 unsigned long flags;
185};
186
8ef5ba63
DJB		 187enum rx_ctrl_state{
188 RX_IDLE,
189 RX_SENT,
190 RX_PENDING
191};
192
542f5482
DJB		 193#define BM_REQUEST_TYPE (0xa1)
194#define B_NOTIFICATION (0x20)
195#define W_VALUE (0x0)
196#define W_INDEX (0x2)
197#define W_LENGTH (0x2)
198
199#define B_OVERRUN (0x1<<6)
200#define B_PARITY (0x1<<5)
201#define B_FRAMING (0x1<<4)
202#define B_RING_SIGNAL (0x1<<3)
203#define B_BREAK (0x1<<2)
204#define B_TX_CARRIER (0x1<<1)
205#define B_RX_CARRIER (0x1<<0)
206
207struct hso_serial_state_notification {
208 u8 bmRequestType;
209 u8 bNotification;
210 u16 wValue;
211 u16 wIndex;
212 u16 wLength;
213 u16 UART_state_bitmap;
214} __attribute__((packed));
215
216struct hso_tiocmget {
217 struct mutex mutex;
218 wait_queue_head_t waitq;
219 int intr_completed;
220 struct usb_endpoint_descriptor *endp;
221 struct urb *urb;
222 struct hso_serial_state_notification serial_state_notification;
223 u16 prev_UART_state_bitmap;
224 struct uart_icount icount;
225};
226
227
72dc1c09
GKH		 228struct hso_serial {
229 struct hso_device *parent;
230 int magic;
231 u8 minor;
232
233 struct hso_shared_int *shared_int;
234
235 /* rx/tx urb could be either a bulk urb or a control urb depending
236 on which serial port it is used on. */
237 struct urb *rx_urb[MAX_RX_URBS];
238 u8 num_rx_urbs;
239 u8 *rx_data[MAX_RX_URBS];
240 u16 rx_data_length; /* should contain allocated length */
241
242 struct urb *tx_urb;
243 u8 *tx_data;
244 u8 *tx_buffer;
245 u16 tx_data_length; /* should contain allocated length */
246 u16 tx_data_count;
247 u16 tx_buffer_count;
248 struct usb_ctrlrequest ctrl_req_tx;
249 struct usb_ctrlrequest ctrl_req_rx;
250
251 struct usb_endpoint_descriptor *in_endp;
252 struct usb_endpoint_descriptor *out_endp;
253
8ef5ba63 254 enum rx_ctrl_state rx_state;
72dc1c09
GKH		 255 u8 rts_state;
256 u8 dtr_state;
257 unsigned tx_urb_used:1;
258
259 /* from usb_serial_port */
260 struct tty_struct *tty;
261 int open_count;
262 spinlock_t serial_lock;
263
264 int (*write_data) (struct hso_serial *serial);
542f5482 265 struct hso_tiocmget *tiocmget;
8ef5ba63
DJB		 266 /* Hacks required to get flow control
267 * working on the serial receive buffers
268 * so as not to drop characters on the floor.
269 */
270 int curr_rx_urb_idx;
271 u16 curr_rx_urb_offset;
272 u8 rx_urb_filled[MAX_RX_URBS];
273 struct tasklet_struct unthrottle_tasklet;
274 struct work_struct retry_unthrottle_workqueue;
72dc1c09
GKH		 275};
276
277struct hso_device {
278 union {
279 struct hso_serial *dev_serial;
280 struct hso_net *dev_net;
281 } port_data;
282
283 u32 port_spec;
284
285 u8 is_active;
286 u8 usb_gone;
287 struct work_struct async_get_intf;
288 struct work_struct async_put_intf;
68a351c5 289 struct work_struct reset_device;
72dc1c09
GKH		 290
291 struct usb_device *usb;
292 struct usb_interface *interface;
293
294 struct device *dev;
295 struct kref ref;
ab153d84 296 struct mutex mutex;
72dc1c09
GKH		 297};
298
299/* Type of interface */
300#define HSO_INTF_MASK 0xFF00
301#define HSO_INTF_MUX 0x0100
302#define HSO_INTF_BULK 0x0200
303
304/* Type of port */
305#define HSO_PORT_MASK 0xFF
306#define HSO_PORT_NO_PORT 0x0
307#define HSO_PORT_CONTROL 0x1
308#define HSO_PORT_APP 0x2
309#define HSO_PORT_GPS 0x3
310#define HSO_PORT_PCSC 0x4
311#define HSO_PORT_APP2 0x5
312#define HSO_PORT_GPS_CONTROL 0x6
313#define HSO_PORT_MSD 0x7
314#define HSO_PORT_VOICE 0x8
315#define HSO_PORT_DIAG2 0x9
316#define HSO_PORT_DIAG 0x10
317#define HSO_PORT_MODEM 0x11
318#define HSO_PORT_NETWORK 0x12
319
320/* Additional device info */
321#define HSO_INFO_MASK 0xFF000000
322#define HSO_INFO_CRC_BUG 0x01000000
323
324/*****************************************************************************/
325/* Prototypes */
326/*****************************************************************************/
327/* Serial driver functions */
328static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
329 unsigned int set, unsigned int clear);
330static void ctrl_callback(struct urb *urb);
8ef5ba63 331static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
72dc1c09
GKH		 332static void hso_kick_transmit(struct hso_serial *serial);
333/* Helper functions */
334static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
335 struct usb_device *usb, gfp_t gfp);
68a351c5
JD		 336static void handle_usb_error(int status, const char *function,
337 struct hso_device *hso_dev);
72dc1c09
GKH		 338static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
339 int type, int dir);
340static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
341static void hso_free_interface(struct usb_interface *intf);
342static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
343static int hso_stop_serial_device(struct hso_device *hso_dev);
344static int hso_start_net_device(struct hso_device *hso_dev);
345static void hso_free_shared_int(struct hso_shared_int *shared_int);
346static int hso_stop_net_device(struct hso_device *hso_dev);
347static void hso_serial_ref_free(struct kref *ref);
8ef5ba63
DJB		 348static void hso_std_serial_read_bulk_callback(struct urb *urb);
349static int hso_mux_serial_read(struct hso_serial *serial);
72dc1c09
GKH		 350static void async_get_intf(struct work_struct *data);
351static void async_put_intf(struct work_struct *data);
352static int hso_put_activity(struct hso_device *hso_dev);
353static int hso_get_activity(struct hso_device *hso_dev);
542f5482 354static void tiocmget_intr_callback(struct urb *urb);
68a351c5 355static void reset_device(struct work_struct *data);
72dc1c09
GKH		 356/*****************************************************************************/
357/* Helping functions */
358/*****************************************************************************/
359
360/* #define DEBUG */
361
0235f641
GKH		 362static inline struct hso_net *dev2net(struct hso_device *hso_dev)
363{
364 return hso_dev->port_data.dev_net;
365}
366
367static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
368{
369 return hso_dev->port_data.dev_serial;
370}
72dc1c09
GKH		 371
372/* Debugging functions */
373#ifdef DEBUG
374static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
375 unsigned int len)
376{
0235f641 377 static char name[255];
72dc1c09 378
0235f641
GKH		 379 sprintf(name, "hso[%d:%s]", line_count, func_name);
380 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
72dc1c09
GKH		 381}
382
383#define DUMP(buf_, len_) \
9ce673d5 384 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
72dc1c09
GKH		 385
386#define DUMP1(buf_, len_) \
387 do { \
388 if (0x01 & debug) \
389 DUMP(buf_, len_); \
390 } while (0)
391#else
392#define DUMP(buf_, len_)
393#define DUMP1(buf_, len_)
394#endif
395
396/* module parameters */
397static int debug;
398static int tty_major;
399static int disable_net;
400
401/* driver info */
402static const char driver_name[] = "hso";
403static const char tty_filename[] = "ttyHS";
404static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
405/* the usb driver itself (registered in hso_init) */
406static struct usb_driver hso_driver;
407/* serial structures */
408static struct tty_driver *tty_drv;
409static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
410static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
411static spinlock_t serial_table_lock;
72dc1c09
GKH		 412
413static const s32 default_port_spec[] = {
414 HSO_INTF_MUX | HSO_PORT_NETWORK,
415 HSO_INTF_BULK | HSO_PORT_DIAG,
416 HSO_INTF_BULK | HSO_PORT_MODEM,
417 0
418};
419
420static const s32 icon321_port_spec[] = {
421 HSO_INTF_MUX | HSO_PORT_NETWORK,
422 HSO_INTF_BULK | HSO_PORT_DIAG2,
423 HSO_INTF_BULK | HSO_PORT_MODEM,
424 HSO_INTF_BULK | HSO_PORT_DIAG,
425 0
426};
427
428#define default_port_device(vendor, product) \
429 USB_DEVICE(vendor, product), \
430 .driver_info = (kernel_ulong_t)default_port_spec
431
432#define icon321_port_device(vendor, product) \
433 USB_DEVICE(vendor, product), \
434 .driver_info = (kernel_ulong_t)icon321_port_spec
435
436/* list of devices we support */
437static const struct usb_device_id hso_ids[] = {
438 {default_port_device(0x0af0, 0x6711)},
439 {default_port_device(0x0af0, 0x6731)},
440 {default_port_device(0x0af0, 0x6751)},
441 {default_port_device(0x0af0, 0x6771)},
442 {default_port_device(0x0af0, 0x6791)},
443 {default_port_device(0x0af0, 0x6811)},
444 {default_port_device(0x0af0, 0x6911)},
445 {default_port_device(0x0af0, 0x6951)},
446 {default_port_device(0x0af0, 0x6971)},
447 {default_port_device(0x0af0, 0x7011)},
448 {default_port_device(0x0af0, 0x7031)},
449 {default_port_device(0x0af0, 0x7051)},
450 {default_port_device(0x0af0, 0x7071)},
451 {default_port_device(0x0af0, 0x7111)},
452 {default_port_device(0x0af0, 0x7211)},
453 {default_port_device(0x0af0, 0x7251)},
454 {default_port_device(0x0af0, 0x7271)},
455 {default_port_device(0x0af0, 0x7311)},
456 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
457 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
458 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
95eacee8 459 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
72dc1c09
GKH		 460 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
461 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
67dd8246 462 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
72dc1c09
GKH		 463 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
464 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
465 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
bab04c3a 466 {USB_DEVICE(0x0af0, 0x7701)},
ec157937 467 {USB_DEVICE(0x0af0, 0x7706)},
bab04c3a
DJB		 468 {USB_DEVICE(0x0af0, 0x7801)},
469 {USB_DEVICE(0x0af0, 0x7901)},
ec157937
JD		 470 {USB_DEVICE(0x0af0, 0x7A01)},
471 {USB_DEVICE(0x0af0, 0x7A05)},
9961d842
JD		 472 {USB_DEVICE(0x0af0, 0x8200)},
473 {USB_DEVICE(0x0af0, 0x8201)},
ec157937
JD		 474 {USB_DEVICE(0x0af0, 0x8300)},
475 {USB_DEVICE(0x0af0, 0x8302)},
476 {USB_DEVICE(0x0af0, 0x8304)},
477 {USB_DEVICE(0x0af0, 0x8400)},
dd7496f2
FA		 478 {USB_DEVICE(0x0af0, 0x8600)},
479 {USB_DEVICE(0x0af0, 0x8800)},
480 {USB_DEVICE(0x0af0, 0x8900)},
9961d842 481 {USB_DEVICE(0x0af0, 0xd035)},
67dd8246 482 {USB_DEVICE(0x0af0, 0xd055)},
9961d842
JD		 483 {USB_DEVICE(0x0af0, 0xd155)},
484 {USB_DEVICE(0x0af0, 0xd255)},
485 {USB_DEVICE(0x0af0, 0xd057)},
486 {USB_DEVICE(0x0af0, 0xd157)},
487 {USB_DEVICE(0x0af0, 0xd257)},
488 {USB_DEVICE(0x0af0, 0xd357)},
ec157937
JD		 489 {USB_DEVICE(0x0af0, 0xd058)},
490 {USB_DEVICE(0x0af0, 0xc100)},
72dc1c09
GKH		 491 {}
492};
493MODULE_DEVICE_TABLE(usb, hso_ids);
494
495/* Sysfs attribute */
496static ssize_t hso_sysfs_show_porttype(struct device *dev,
497 struct device_attribute *attr,
498 char *buf)
499{
1aec5bdf 500 struct hso_device *hso_dev = dev_get_drvdata(dev);
72dc1c09
GKH		 501 char *port_name;
502
503 if (!hso_dev)
504 return 0;
505
506 switch (hso_dev->port_spec & HSO_PORT_MASK) {
507 case HSO_PORT_CONTROL:
508 port_name = "Control";
509 break;
510 case HSO_PORT_APP:
511 port_name = "Application";
512 break;
513 case HSO_PORT_APP2:
514 port_name = "Application2";
515 break;
516 case HSO_PORT_GPS:
517 port_name = "GPS";
518 break;
519 case HSO_PORT_GPS_CONTROL:
520 port_name = "GPS Control";
521 break;
522 case HSO_PORT_PCSC:
523 port_name = "PCSC";
524 break;
525 case HSO_PORT_DIAG:
526 port_name = "Diagnostic";
527 break;
528 case HSO_PORT_DIAG2:
529 port_name = "Diagnostic2";
530 break;
531 case HSO_PORT_MODEM:
532 port_name = "Modem";
533 break;
534 case HSO_PORT_NETWORK:
535 port_name = "Network";
536 break;
537 default:
538 port_name = "Unknown";
539 break;
540 }
541
542 return sprintf(buf, "%s\n", port_name);
543}
544static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
545
8ef5ba63
DJB		 546static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
547{
548 int idx;
549
550 for (idx = 0; idx < serial->num_rx_urbs; idx++)
551 if (serial->rx_urb[idx] == urb)
552 return idx;
553 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
554 return -1;
555}
556
72dc1c09
GKH		 557/* converts mux value to a port spec value */
558static u32 hso_mux_to_port(int mux)
559{
560 u32 result;
561
562 switch (mux) {
563 case 0x1:
564 result = HSO_PORT_CONTROL;
565 break;
566 case 0x2:
567 result = HSO_PORT_APP;
568 break;
569 case 0x4:
570 result = HSO_PORT_PCSC;
571 break;
572 case 0x8:
573 result = HSO_PORT_GPS;
574 break;
575 case 0x10:
576 result = HSO_PORT_APP2;
577 break;
578 default:
579 result = HSO_PORT_NO_PORT;
580 }
581 return result;
582}
583
584/* converts port spec value to a mux value */
585static u32 hso_port_to_mux(int port)
586{
587 u32 result;
588
589 switch (port & HSO_PORT_MASK) {
590 case HSO_PORT_CONTROL:
591 result = 0x0;
592 break;
593 case HSO_PORT_APP:
594 result = 0x1;
595 break;
596 case HSO_PORT_PCSC:
597 result = 0x2;
598 break;
599 case HSO_PORT_GPS:
600 result = 0x3;
601 break;
602 case HSO_PORT_APP2:
603 result = 0x4;
604 break;
605 default:
606 result = 0x0;
607 }
608 return result;
609}
610
611static struct hso_serial *get_serial_by_shared_int_and_type(
612 struct hso_shared_int *shared_int,
613 int mux)
614{
615 int i, port;
616
617 port = hso_mux_to_port(mux);
618
619 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
8e95a202
JP		 620 if (serial_table[i] &&
621 (dev2ser(serial_table[i])->shared_int == shared_int) &&
622 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
72dc1c09
GKH		 623 return dev2ser(serial_table[i]);
624 }
625 }
626
627 return NULL;
628}
629
630static struct hso_serial *get_serial_by_index(unsigned index)
631{
0235f641 632 struct hso_serial *serial = NULL;
72dc1c09
GKH		 633 unsigned long flags;
634
72dc1c09 635 spin_lock_irqsave(&serial_table_lock, flags);
0235f641
GKH		 636 if (serial_table[index])
637 serial = dev2ser(serial_table[index]);
72dc1c09
GKH		 638 spin_unlock_irqrestore(&serial_table_lock, flags);
639
640 return serial;
641}
642
643static int get_free_serial_index(void)
644{
645 int index;
646 unsigned long flags;
647
648 spin_lock_irqsave(&serial_table_lock, flags);
649 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
650 if (serial_table[index] == NULL) {
651 spin_unlock_irqrestore(&serial_table_lock, flags);
652 return index;
653 }
654 }
655 spin_unlock_irqrestore(&serial_table_lock, flags);
656
657 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
658 return -1;
659}
660
661static void set_serial_by_index(unsigned index, struct hso_serial *serial)
662{
663 unsigned long flags;
0235f641 664
72dc1c09
GKH		 665 spin_lock_irqsave(&serial_table_lock, flags);
666 if (serial)
667 serial_table[index] = serial->parent;
668 else
669 serial_table[index] = NULL;
670 spin_unlock_irqrestore(&serial_table_lock, flags);
671}
672
68a351c5
JD		 673static void handle_usb_error(int status, const char *function,
674 struct hso_device *hso_dev)
72dc1c09
GKH		 675{
676 char *explanation;
677
678 switch (status) {
679 case -ENODEV:
680 explanation = "no device";
681 break;
682 case -ENOENT:
683 explanation = "endpoint not enabled";
684 break;
685 case -EPIPE:
686 explanation = "endpoint stalled";
687 break;
688 case -ENOSPC:
689 explanation = "not enough bandwidth";
690 break;
691 case -ESHUTDOWN:
692 explanation = "device disabled";
693 break;
694 case -EHOSTUNREACH:
695 explanation = "device suspended";
696 break;
697 case -EINVAL:
698 case -EAGAIN:
699 case -EFBIG:
700 case -EMSGSIZE:
701 explanation = "internal error";
702 break;
68a351c5
JD		 703 case -EILSEQ:
704 case -EPROTO:
705 case -ETIME:
706 case -ETIMEDOUT:
707 explanation = "protocol error";
708 if (hso_dev)
709 schedule_work(&hso_dev->reset_device);
710 break;
72dc1c09
GKH		 711 default:
712 explanation = "unknown status";
713 break;
714 }
68a351c5
JD		 715
716 /* log a meaningful explanation of an USB status */
72dc1c09
GKH		 717 D1("%s: received USB status - %s (%d)", function, explanation, status);
718}
719
720/* Network interface functions */
721
722/* called when net interface is brought up by ifconfig */
723static int hso_net_open(struct net_device *net)
724{
725 struct hso_net *odev = netdev_priv(net);
726 unsigned long flags = 0;
727
728 if (!odev) {
729 dev_err(&net->dev, "No net device !\n");
730 return -ENODEV;
731 }
732
733 odev->skb_tx_buf = NULL;
734
735 /* setup environment */
736 spin_lock_irqsave(&odev->net_lock, flags);
737 odev->rx_parse_state = WAIT_IP;
738 odev->rx_buf_size = 0;
739 odev->rx_buf_missing = sizeof(struct iphdr);
740 spin_unlock_irqrestore(&odev->net_lock, flags);
741
72dc1c09
GKH		 742 /* We are up and running. */
743 set_bit(HSO_NET_RUNNING, &odev->flags);
889bd9b6 744 hso_start_net_device(odev->parent);
72dc1c09
GKH		 745
746 /* Tell the kernel we are ready to start receiving from it */
747 netif_start_queue(net);
748
749 return 0;
750}
751
752/* called when interface is brought down by ifconfig */
753static int hso_net_close(struct net_device *net)
754{
755 struct hso_net *odev = netdev_priv(net);
756
757 /* we don't need the queue anymore */
758 netif_stop_queue(net);
759 /* no longer running */
760 clear_bit(HSO_NET_RUNNING, &odev->flags);
761
762 hso_stop_net_device(odev->parent);
763
764 /* done */
765 return 0;
766}
767
768/* USB tells is xmit done, we should start the netqueue again */
769static void write_bulk_callback(struct urb *urb)
770{
771 struct hso_net *odev = urb->context;
772 int status = urb->status;
773
774 /* Sanity check */
775 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
776 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
777 return;
778 }
779
780 /* Do we still have a valid kernel network device? */
781 if (!netif_device_present(odev->net)) {
782 dev_err(&urb->dev->dev, "%s: net device not present\n",
783 __func__);
784 return;
785 }
786
787 /* log status, but don't act on it, we don't need to resubmit anything
788 * anyhow */
789 if (status)
68a351c5 790 handle_usb_error(status, __func__, odev->parent);
72dc1c09
GKH		 791
792 hso_put_activity(odev->parent);
793
794 /* Tell the network interface we are ready for another frame */
795 netif_wake_queue(odev->net);
796}
797
798/* called by kernel when we need to transmit a packet */
25a79c41
SH		 799static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
800 struct net_device *net)
72dc1c09
GKH		 801{
802 struct hso_net *odev = netdev_priv(net);
803 int result;
804
805 /* Tell the kernel, "No more frames 'til we are done with this one." */
806 netif_stop_queue(net);
807 if (hso_get_activity(odev->parent) == -EAGAIN) {
808 odev->skb_tx_buf = skb;
6ed10654 809 return NETDEV_TX_OK;
72dc1c09
GKH		 810 }
811
812 /* log if asked */
813 DUMP1(skb->data, skb->len);
814 /* Copy it from kernel memory to OUR memory */
815 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
816 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
817
818 /* Fill in the URB for shipping it out. */
819 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
820 odev->parent->usb,
821 usb_sndbulkpipe(odev->parent->usb,
822 odev->out_endp->
823 bEndpointAddress & 0x7F),
824 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
825 odev);
826
827 /* Deal with the Zero Length packet problem, I hope */
828 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
829
830 /* Send the URB on its merry way. */
831 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
832 if (result) {
833 dev_warn(&odev->parent->interface->dev,
8a5c9c49 834 "failed mux_bulk_tx_urb %d\n", result);
72dc1c09
GKH		 835 net->stats.tx_errors++;
836 netif_start_queue(net);
837 } else {
838 net->stats.tx_packets++;
839 net->stats.tx_bytes += skb->len;
72dc1c09
GKH		 840 }
841 dev_kfree_skb(skb);
842 /* we're done */
5b2c4b97 843 return NETDEV_TX_OK;
72dc1c09
GKH		 844}
845
846static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
847{
848 struct hso_net *odev = netdev_priv(net);
849
850 strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
851 strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
852 usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
853}
854
0fc0b732 855static const struct ethtool_ops ops = {
72dc1c09
GKH		 856 .get_drvinfo = hso_get_drvinfo,
857 .get_link = ethtool_op_get_link
858};
859
860/* called when a packet did not ack after watchdogtimeout */
861static void hso_net_tx_timeout(struct net_device *net)
862{
863 struct hso_net *odev = netdev_priv(net);
864
865 if (!odev)
866 return;
867
868 /* Tell syslog we are hosed. */
869 dev_warn(&net->dev, "Tx timed out.\n");
870
871 /* Tear the waiting frame off the list */
8e95a202
JP		 872 if (odev->mux_bulk_tx_urb &&
873 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
72dc1c09
GKH		 874 usb_unlink_urb(odev->mux_bulk_tx_urb);
875
876 /* Update statistics */
877 net->stats.tx_errors++;
878}
879
880/* make a real packet from the received USB buffer */
881static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
882 unsigned int count, unsigned char is_eop)
883{
884 unsigned short temp_bytes;
885 unsigned short buffer_offset = 0;
886 unsigned short frame_len;
887 unsigned char *tmp_rx_buf;
888
889 /* log if needed */
890 D1("Rx %d bytes", count);
891 DUMP(ip_pkt, min(128, (int)count));
892
893 while (count) {
894 switch (odev->rx_parse_state) {
895 case WAIT_IP:
896 /* waiting for IP header. */
897 /* wanted bytes - size of ip header */
898 temp_bytes =
899 (count <
900 odev->rx_buf_missing) ? count : odev->
901 rx_buf_missing;
902
903 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
904 odev->rx_buf_size, ip_pkt + buffer_offset,
905 temp_bytes);
906
907 odev->rx_buf_size += temp_bytes;
908 buffer_offset += temp_bytes;
909 odev->rx_buf_missing -= temp_bytes;
910 count -= temp_bytes;
911
912 if (!odev->rx_buf_missing) {
913 /* header is complete allocate an sk_buffer and
914 * continue to WAIT_DATA */
915 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
916
917 if ((frame_len > DEFAULT_MRU) ||
918 (frame_len < sizeof(struct iphdr))) {
919 dev_err(&odev->net->dev,
920 "Invalid frame (%d) length\n",
921 frame_len);
922 odev->rx_parse_state = WAIT_SYNC;
923 continue;
924 }
925 /* Allocate an sk_buff */
d65a68a8
PZ		 926 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
927 frame_len);
72dc1c09
GKH		 928 if (!odev->skb_rx_buf) {
929 /* We got no receive buffer. */
930 D1("could not allocate memory");
931 odev->rx_parse_state = WAIT_SYNC;
932 return;
933 }
72dc1c09
GKH		 934
935 /* Copy what we got so far. make room for iphdr
936 * after tail. */
937 tmp_rx_buf =
938 skb_put(odev->skb_rx_buf,
939 sizeof(struct iphdr));
940 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
941 sizeof(struct iphdr));
942
943 /* ETH_HLEN */
944 odev->rx_buf_size = sizeof(struct iphdr);
945
946 /* Filip actually use .tot_len */
947 odev->rx_buf_missing =
948 frame_len - sizeof(struct iphdr);
949 odev->rx_parse_state = WAIT_DATA;
950 }
951 break;
952
953 case WAIT_DATA:
954 temp_bytes = (count < odev->rx_buf_missing)
955 ? count : odev->rx_buf_missing;
956
957 /* Copy the rest of the bytes that are left in the
958 * buffer into the waiting sk_buf. */
959 /* Make room for temp_bytes after tail. */
960 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
961 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
962
963 odev->rx_buf_missing -= temp_bytes;
964 count -= temp_bytes;
965 buffer_offset += temp_bytes;
966 odev->rx_buf_size += temp_bytes;
967 if (!odev->rx_buf_missing) {
968 /* Packet is complete. Inject into stack. */
969 /* We have IP packet here */
09640e63 970 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
72dc1c09
GKH		 971 /* don't check it */
972 odev->skb_rx_buf->ip_summed =
973 CHECKSUM_UNNECESSARY;
974
975 skb_reset_mac_header(odev->skb_rx_buf);
976
977 /* Ship it off to the kernel */
978 netif_rx(odev->skb_rx_buf);
979 /* No longer our buffer. */
980 odev->skb_rx_buf = NULL;
981
982 /* update out statistics */
983 odev->net->stats.rx_packets++;
984
985 odev->net->stats.rx_bytes += odev->rx_buf_size;
986
987 odev->rx_buf_size = 0;
988 odev->rx_buf_missing = sizeof(struct iphdr);
989 odev->rx_parse_state = WAIT_IP;
990 }
991 break;
992
993 case WAIT_SYNC:
994 D1(" W_S");
995 count = 0;
996 break;
997 default:
998 D1(" ");
999 count--;
1000 break;
1001 }
1002 }
1003
1004 /* Recovery mechanism for WAIT_SYNC state. */
1005 if (is_eop) {
1006 if (odev->rx_parse_state == WAIT_SYNC) {
1007 odev->rx_parse_state = WAIT_IP;
1008 odev->rx_buf_size = 0;
1009 odev->rx_buf_missing = sizeof(struct iphdr);
1010 }
1011 }
1012}
1013
1014/* Moving data from usb to kernel (in interrupt state) */
1015static void read_bulk_callback(struct urb *urb)
1016{
1017 struct hso_net *odev = urb->context;
1018 struct net_device *net;
1019 int result;
1020 int status = urb->status;
1021
1022 /* is al ok? (Filip: Who's Al ?) */
1023 if (status) {
68a351c5 1024 handle_usb_error(status, __func__, odev->parent);
72dc1c09
GKH		 1025 return;
1026 }
1027
1028 /* Sanity check */
1029 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1030 D1("BULK IN callback but driver is not active!");
1031 return;
1032 }
1033 usb_mark_last_busy(urb->dev);
1034
1035 net = odev->net;
1036
1037 if (!netif_device_present(net)) {
1038 /* Somebody killed our network interface... */
1039 return;
1040 }
1041
1042 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1043 u32 rest;
1044 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
d9ced80d
JD		 1045 rest = urb->actual_length %
1046 le16_to_cpu(odev->in_endp->wMaxPacketSize);
8e95a202
JP		 1047 if (((rest == 5) || (rest == 6)) &&
1048 !memcmp(((u8 *) urb->transfer_buffer) +
1049 urb->actual_length - 4, crc_check, 4)) {
72dc1c09
GKH		 1050 urb->actual_length -= 4;
1051 }
1052 }
1053
1054 /* do we even have a packet? */
1055 if (urb->actual_length) {
1056 /* Handle the IP stream, add header and push it onto network
1057 * stack if the packet is complete. */
1058 spin_lock(&odev->net_lock);
1059 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1060 (urb->transfer_buffer_length >
1061 urb->actual_length) ? 1 : 0);
1062 spin_unlock(&odev->net_lock);
1063 }
1064
1065 /* We are done with this URB, resubmit it. Prep the USB to wait for
1066 * another frame. Reuse same as received. */
1067 usb_fill_bulk_urb(urb,
1068 odev->parent->usb,
1069 usb_rcvbulkpipe(odev->parent->usb,
1070 odev->in_endp->
1071 bEndpointAddress & 0x7F),
1072 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1073 read_bulk_callback, odev);
1074
1075 /* Give this to the USB subsystem so it can tell us when more data
1076 * arrives. */
1077 result = usb_submit_urb(urb, GFP_ATOMIC);
1078 if (result)
1079 dev_warn(&odev->parent->interface->dev,
8a5c9c49 1080 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
72dc1c09
GKH		 1081 result);
1082}
1083
1084/* Serial driver functions */
1085
ac9720c3 1086static void hso_init_termios(struct ktermios *termios)
72dc1c09 1087{
72dc1c09
GKH		 1088 /*
1089 * The default requirements for this device are:
1090 */
72dc1c09
GKH		 1091 termios->c_iflag &=
1092 ~(IGNBRK /* disable ignore break */
1093 | BRKINT /* disable break causes interrupt */
1094 | PARMRK /* disable mark parity errors */
1095 | ISTRIP /* disable clear high bit of input characters */
1096 | INLCR /* disable translate NL to CR */
1097 | IGNCR /* disable ignore CR */
1098 | ICRNL /* disable translate CR to NL */
1099 | IXON); /* disable enable XON/XOFF flow control */
1100
1101 /* disable postprocess output characters */
1102 termios->c_oflag &= ~OPOST;
1103
1104 termios->c_lflag &=
1105 ~(ECHO /* disable echo input characters */
1106 | ECHONL /* disable echo new line */
1107 | ICANON /* disable erase, kill, werase, and rprnt
1108 special characters */
1109 | ISIG /* disable interrupt, quit, and suspend special
1110 characters */
1111 | IEXTEN); /* disable non-POSIX special characters */
1112
1113 termios->c_cflag &=
1114 ~(CSIZE /* no size */
1115 | PARENB /* disable parity bit */
1116 | CBAUD /* clear current baud rate */
1117 | CBAUDEX); /* clear current buad rate */
1118
1119 termios->c_cflag |= CS8; /* character size 8 bits */
1120
1121 /* baud rate 115200 */
ac9720c3
AC		 1122 tty_termios_encode_baud_rate(termios, 115200, 115200);
1123}
1124
1125static void _hso_serial_set_termios(struct tty_struct *tty,
1126 struct ktermios *old)
1127{
1128 struct hso_serial *serial = get_serial_by_tty(tty);
1129 struct ktermios *termios;
1130
1131 if (!serial) {
1132 printk(KERN_ERR "%s: no tty structures", __func__);
1133 return;
1134 }
1135
1136 D4("port %d", serial->minor);
72dc1c09
GKH		 1137
1138 /*
ac9720c3 1139 * Fix up unsupported bits
72dc1c09 1140 */
ac9720c3
AC		 1141 termios = tty->termios;
1142 termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1143
1144 termios->c_cflag &=
1145 ~(CSIZE /* no size */
1146 | PARENB /* disable parity bit */
1147 | CBAUD /* clear current baud rate */
1148 | CBAUDEX); /* clear current buad rate */
1149
1150 termios->c_cflag |= CS8; /* character size 8 bits */
1151
1152 /* baud rate 115200 */
1153 tty_encode_baud_rate(tty, 115200, 115200);
72dc1c09
GKH		 1154}
1155
8ef5ba63
DJB		 1156static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1157{
1158 int result;
8ef5ba63
DJB		 1159 /* We are done with this URB, resubmit it. Prep the USB to wait for
1160 * another frame */
1161 usb_fill_bulk_urb(urb, serial->parent->usb,
1162 usb_rcvbulkpipe(serial->parent->usb,
1163 serial->in_endp->
1164 bEndpointAddress & 0x7F),
1165 urb->transfer_buffer, serial->rx_data_length,
1166 hso_std_serial_read_bulk_callback, serial);
1167 /* Give this to the USB subsystem so it can tell us when more data
1168 * arrives. */
1169 result = usb_submit_urb(urb, GFP_ATOMIC);
1170 if (result) {
1171 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1172 __func__, result);
1173 }
1174}
1175
1176
1177
1178
1179static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1180{
1181 int count;
1182 struct urb *curr_urb;
1183
1184 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1185 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1186 count = put_rxbuf_data(curr_urb, serial);
1187 if (count == -1)
1188 return;
1189 if (count == 0) {
1190 serial->curr_rx_urb_idx++;
1191 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1192 serial->curr_rx_urb_idx = 0;
1193 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1194 }
1195 }
1196}
1197
1198static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1199{
1200 int count = 0;
1201 struct urb *urb;
1202
1203 urb = serial->rx_urb[0];
1204 if (serial->open_count > 0) {
1205 count = put_rxbuf_data(urb, serial);
1206 if (count == -1)
1207 return;
1208 }
1209 /* Re issue a read as long as we receive data. */
1210
1211 if (count == 0 && ((urb->actual_length != 0) ||
1212 (serial->rx_state == RX_PENDING))) {
1213 serial->rx_state = RX_SENT;
1214 hso_mux_serial_read(serial);
1215 } else
1216 serial->rx_state = RX_IDLE;
1217}
1218
1219
1220/* read callback for Diag and CS port */
1221static void hso_std_serial_read_bulk_callback(struct urb *urb)
1222{
1223 struct hso_serial *serial = urb->context;
1224 int status = urb->status;
1225
1226 /* sanity check */
1227 if (!serial) {
1228 D1("serial == NULL");
1229 return;
1230 } else if (status) {
68a351c5 1231 handle_usb_error(status, __func__, serial->parent);
8ef5ba63
DJB		 1232 return;
1233 }
1234
1235 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1236 D1("Actual length = %d\n", urb->actual_length);
1237 DUMP1(urb->transfer_buffer, urb->actual_length);
1238
1239 /* Anyone listening? */
1240 if (serial->open_count == 0)
1241 return;
1242
1243 if (status == 0) {
1244 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1245 u32 rest;
1246 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1247 rest =
1248 urb->actual_length %
d9ced80d 1249 le16_to_cpu(serial->in_endp->wMaxPacketSize);
8e95a202
JP		 1250 if (((rest == 5) || (rest == 6)) &&
1251 !memcmp(((u8 *) urb->transfer_buffer) +
1252 urb->actual_length - 4, crc_check, 4)) {
8ef5ba63
DJB		 1253 urb->actual_length -= 4;
1254 }
1255 }
1256 /* Valid data, handle RX data */
1257 spin_lock(&serial->serial_lock);
1258 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1259 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1260 spin_unlock(&serial->serial_lock);
1261 } else if (status == -ENOENT || status == -ECONNRESET) {
1262 /* Unlinked - check for throttled port. */
1263 D2("Port %d, successfully unlinked urb", serial->minor);
1264 spin_lock(&serial->serial_lock);
1265 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1266 hso_resubmit_rx_bulk_urb(serial, urb);
1267 spin_unlock(&serial->serial_lock);
1268 } else {
1269 D2("Port %d, status = %d for read urb", serial->minor, status);
1270 return;
1271 }
1272}
1273
1274/*
1275 * This needs to be a tasklet otherwise we will
1276 * end up recursively calling this function.
1277 */
0227abc9 1278static void hso_unthrottle_tasklet(struct hso_serial *serial)
8ef5ba63
DJB		 1279{
1280 unsigned long flags;
1281
1282 spin_lock_irqsave(&serial->serial_lock, flags);
1283 if ((serial->parent->port_spec & HSO_INTF_MUX))
1284 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1285 else
1286 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1287 spin_unlock_irqrestore(&serial->serial_lock, flags);
1288}
1289
1290static void hso_unthrottle(struct tty_struct *tty)
1291{
1292 struct hso_serial *serial = get_serial_by_tty(tty);
1293
1294 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1295}
1296
0227abc9 1297static void hso_unthrottle_workfunc(struct work_struct *work)
8ef5ba63
DJB		 1298{
1299 struct hso_serial *serial =
1300 container_of(work, struct hso_serial,
1301 retry_unthrottle_workqueue);
1302 hso_unthrottle_tasklet(serial);
1303}
1304
72dc1c09
GKH		 1305/* open the requested serial port */
1306static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1307{
1308 struct hso_serial *serial = get_serial_by_index(tty->index);
ab153d84 1309 int result;
72dc1c09
GKH		 1310
1311 /* sanity check */
1312 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
e136e303 1313 WARN_ON(1);
72dc1c09
GKH		 1314 tty->driver_data = NULL;
1315 D1("Failed to open port");
1316 return -ENODEV;
1317 }
1318
ab153d84 1319 mutex_lock(&serial->parent->mutex);
ab153d84
DM		 1320 result = usb_autopm_get_interface(serial->parent->interface);
1321 if (result < 0)
72dc1c09
GKH		 1322 goto err_out;
1323
1324 D1("Opening %d", serial->minor);
1325 kref_get(&serial->parent->ref);
1326
1327 /* setup */
e136e303 1328 spin_lock_irq(&serial->serial_lock);
72dc1c09 1329 tty->driver_data = serial;
fe41cbb1 1330 tty_kref_put(serial->tty);
e136e303
AC		 1331 serial->tty = tty_kref_get(tty);
1332 spin_unlock_irq(&serial->serial_lock);
72dc1c09 1333
2f9889a2
DM		 1334 /* check for port already opened, if not set the termios */
1335 serial->open_count++;
72dc1c09 1336 if (serial->open_count == 1) {
8ef5ba63 1337 serial->rx_state = RX_IDLE;
72dc1c09
GKH		 1338 /* Force default termio settings */
1339 _hso_serial_set_termios(tty, NULL);
8ef5ba63
DJB		 1340 tasklet_init(&serial->unthrottle_tasklet,
1341 (void (*)(unsigned long))hso_unthrottle_tasklet,
1342 (unsigned long)serial);
1343 INIT_WORK(&serial->retry_unthrottle_workqueue,
1344 hso_unthrottle_workfunc);
ab153d84
DM		 1345 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1346 if (result) {
72dc1c09
GKH		 1347 hso_stop_serial_device(serial->parent);
1348 serial->open_count--;
ab153d84 1349 kref_put(&serial->parent->ref, hso_serial_ref_free);
72dc1c09
GKH		 1350 }
1351 } else {
1352 D1("Port was already open");
1353 }
1354
1355 usb_autopm_put_interface(serial->parent->interface);
1356
1357 /* done */
ab153d84 1358 if (result)
72dc1c09
GKH		 1359 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1360err_out:
ab153d84
DM		 1361 mutex_unlock(&serial->parent->mutex);
1362 return result;
72dc1c09
GKH		 1363}
1364
1365/* close the requested serial port */
1366static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1367{
1368 struct hso_serial *serial = tty->driver_data;
1369 u8 usb_gone;
1370
1371 D1("Closing serial port");
1372
e136e303
AC		 1373 /* Open failed, no close cleanup required */
1374 if (serial == NULL)
1375 return;
1376
ab153d84 1377 mutex_lock(&serial->parent->mutex);
72dc1c09
GKH		 1378 usb_gone = serial->parent->usb_gone;
1379
1380 if (!usb_gone)
1381 usb_autopm_get_interface(serial->parent->interface);
1382
1383 /* reset the rts and dtr */
1384 /* do the actual close */
1385 serial->open_count--;
dcfcb256 1386
72dc1c09 1387 if (serial->open_count <= 0) {
72dc1c09 1388 serial->open_count = 0;
e136e303
AC		 1389 spin_lock_irq(&serial->serial_lock);
1390 if (serial->tty == tty) {
72dc1c09
GKH		 1391 serial->tty->driver_data = NULL;
1392 serial->tty = NULL;
e136e303 1393 tty_kref_put(tty);
72dc1c09 1394 }
e136e303 1395 spin_unlock_irq(&serial->serial_lock);
72dc1c09
GKH		 1396 if (!usb_gone)
1397 hso_stop_serial_device(serial->parent);
8ef5ba63
DJB		 1398 tasklet_kill(&serial->unthrottle_tasklet);
1399 cancel_work_sync(&serial->retry_unthrottle_workqueue);
72dc1c09 1400 }
8ef5ba63 1401
72dc1c09
GKH		 1402 if (!usb_gone)
1403 usb_autopm_put_interface(serial->parent->interface);
ab153d84
DM		 1404
1405 mutex_unlock(&serial->parent->mutex);
dcfcb256
AK		 1406
1407 kref_put(&serial->parent->ref, hso_serial_ref_free);
72dc1c09
GKH		 1408}
1409
1410/* close the requested serial port */
1411static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1412 int count)
1413{
1414 struct hso_serial *serial = get_serial_by_tty(tty);
1415 int space, tx_bytes;
1416 unsigned long flags;
1417
1418 /* sanity check */
1419 if (serial == NULL) {
1420 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1421 return -ENODEV;
1422 }
1423
1424 spin_lock_irqsave(&serial->serial_lock, flags);
1425
1426 space = serial->tx_data_length - serial->tx_buffer_count;
1427 tx_bytes = (count < space) ? count : space;
1428
1429 if (!tx_bytes)
1430 goto out;
1431
1432 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1433 serial->tx_buffer_count += tx_bytes;
1434
1435out:
1436 spin_unlock_irqrestore(&serial->serial_lock, flags);
1437
1438 hso_kick_transmit(serial);
1439 /* done */
1440 return tx_bytes;
1441}
1442
1443/* how much room is there for writing */
1444static int hso_serial_write_room(struct tty_struct *tty)
1445{
1446 struct hso_serial *serial = get_serial_by_tty(tty);
1447 int room;
1448 unsigned long flags;
1449
1450 spin_lock_irqsave(&serial->serial_lock, flags);
1451 room = serial->tx_data_length - serial->tx_buffer_count;
1452 spin_unlock_irqrestore(&serial->serial_lock, flags);
1453
1454 /* return free room */
1455 return room;
1456}
1457
1458/* setup the term */
1459static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1460{
1461 struct hso_serial *serial = get_serial_by_tty(tty);
1462 unsigned long flags;
1463
1464 if (old)
1465 D5("Termios called with: cflags new[%d] - old[%d]",
1466 tty->termios->c_cflag, old->c_cflag);
1467
1468 /* the actual setup */
1469 spin_lock_irqsave(&serial->serial_lock, flags);
1470 if (serial->open_count)
1471 _hso_serial_set_termios(tty, old);
1472 else
1473 tty->termios = old;
1474 spin_unlock_irqrestore(&serial->serial_lock, flags);
1475
1476 /* done */
72dc1c09
GKH		 1477}
1478
1479/* how many characters in the buffer */
1480static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1481{
1482 struct hso_serial *serial = get_serial_by_tty(tty);
1483 int chars;
1484 unsigned long flags;
1485
1486 /* sanity check */
1487 if (serial == NULL)
1488 return 0;
1489
1490 spin_lock_irqsave(&serial->serial_lock, flags);
1491 chars = serial->tx_buffer_count;
1492 spin_unlock_irqrestore(&serial->serial_lock, flags);
1493
1494 return chars;
1495}
0227abc9
HE		 1496static int tiocmget_submit_urb(struct hso_serial *serial,
1497 struct hso_tiocmget *tiocmget,
1498 struct usb_device *usb)
542f5482
DJB		 1499{
1500 int result;
1501
1502 if (serial->parent->usb_gone)
1503 return -ENODEV;
1504 usb_fill_int_urb(tiocmget->urb, usb,
1505 usb_rcvintpipe(usb,
1506 tiocmget->endp->
1507 bEndpointAddress & 0x7F),
1508 &tiocmget->serial_state_notification,
1509 sizeof(struct hso_serial_state_notification),
1510 tiocmget_intr_callback, serial,
1511 tiocmget->endp->bInterval);
1512 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1513 if (result) {
1514 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1515 result);
1516 }
1517 return result;
1518
1519}
1520
1521static void tiocmget_intr_callback(struct urb *urb)
1522{
1523 struct hso_serial *serial = urb->context;
1524 struct hso_tiocmget *tiocmget;
1525 int status = urb->status;
1526 u16 UART_state_bitmap, prev_UART_state_bitmap;
1527 struct uart_icount *icount;
1528 struct hso_serial_state_notification *serial_state_notification;
1529 struct usb_device *usb;
1530
1531 /* Sanity checks */
1532 if (!serial)
1533 return;
1534 if (status) {
68a351c5 1535 handle_usb_error(status, __func__, serial->parent);
542f5482
DJB		 1536 return;
1537 }
1538 tiocmget = serial->tiocmget;
1539 if (!tiocmget)
1540 return;
1541 usb = serial->parent->usb;
1542 serial_state_notification = &tiocmget->serial_state_notification;
1543 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1544 serial_state_notification->bNotification != B_NOTIFICATION ||
1545 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1546 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1547 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1548 dev_warn(&usb->dev,
1549 "hso received invalid serial state notification\n");
1550 DUMP(serial_state_notification,
9ce673d5 1551 sizeof(struct hso_serial_state_notification));
542f5482
DJB		 1552 } else {
1553
1554 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1555 UART_state_bitmap);
1556 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1557 icount = &tiocmget->icount;
1558 spin_lock(&serial->serial_lock);
1559 if ((UART_state_bitmap & B_OVERRUN) !=
1560 (prev_UART_state_bitmap & B_OVERRUN))
1561 icount->parity++;
1562 if ((UART_state_bitmap & B_PARITY) !=
1563 (prev_UART_state_bitmap & B_PARITY))
1564 icount->parity++;
1565 if ((UART_state_bitmap & B_FRAMING) !=
1566 (prev_UART_state_bitmap & B_FRAMING))
1567 icount->frame++;
1568 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1569 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1570 icount->rng++;
1571 if ((UART_state_bitmap & B_BREAK) !=
1572 (prev_UART_state_bitmap & B_BREAK))
1573 icount->brk++;
1574 if ((UART_state_bitmap & B_TX_CARRIER) !=
1575 (prev_UART_state_bitmap & B_TX_CARRIER))
1576 icount->dsr++;
1577 if ((UART_state_bitmap & B_RX_CARRIER) !=
1578 (prev_UART_state_bitmap & B_RX_CARRIER))
1579 icount->dcd++;
1580 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1581 spin_unlock(&serial->serial_lock);
1582 tiocmget->intr_completed = 1;
1583 wake_up_interruptible(&tiocmget->waitq);
1584 }
1585 memset(serial_state_notification, 0,
1586 sizeof(struct hso_serial_state_notification));
1587 tiocmget_submit_urb(serial,
1588 tiocmget,
1589 serial->parent->usb);
1590}
1591
1592/*
1593 * next few functions largely stolen from drivers/serial/serial_core.c
1594 */
1595/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1596 * - mask passed in arg for lines of interest
1597 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1598 * Caller should use TIOCGICOUNT to see which one it was
1599 */
1600static int
1601hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1602{
1603 DECLARE_WAITQUEUE(wait, current);
1604 struct uart_icount cprev, cnow;
1605 struct hso_tiocmget *tiocmget;
1606 int ret;
1607
1608 tiocmget = serial->tiocmget;
1609 if (!tiocmget)
1610 return -ENOENT;
1611 /*
1612 * note the counters on entry
1613 */
1614 spin_lock_irq(&serial->serial_lock);
1615 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1616 spin_unlock_irq(&serial->serial_lock);
1617 add_wait_queue(&tiocmget->waitq, &wait);
1618 for (;;) {
1619 spin_lock_irq(&serial->serial_lock);
1620 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1621 spin_unlock_irq(&serial->serial_lock);
1622 set_current_state(TASK_INTERRUPTIBLE);
1623 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1624 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1625 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1626 ret = 0;
1627 break;
1628 }
1629 schedule();
1630 /* see if a signal did it */
1631 if (signal_pending(current)) {
1632 ret = -ERESTARTSYS;
1633 break;
1634 }
1635 cprev = cnow;
1636 }
1637 current->state = TASK_RUNNING;
1638 remove_wait_queue(&tiocmget->waitq, &wait);
1639
1640 return ret;
1641}
1642
1643/*
1644 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1645 * Return: write counters to the user passed counter struct
1646 * NB: both 1->0 and 0->1 transitions are counted except for
1647 * RI where only 0->1 is counted.
1648 */
1649static int hso_get_count(struct hso_serial *serial,
1650 struct serial_icounter_struct __user *icnt)
1651{
1652 struct serial_icounter_struct icount;
1653 struct uart_icount cnow;
1654 struct hso_tiocmget *tiocmget = serial->tiocmget;
1655
1656 if (!tiocmget)
1657 return -ENOENT;
1658 spin_lock_irq(&serial->serial_lock);
1659 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1660 spin_unlock_irq(&serial->serial_lock);
1661
1662 icount.cts = cnow.cts;
1663 icount.dsr = cnow.dsr;
1664 icount.rng = cnow.rng;
1665 icount.dcd = cnow.dcd;
1666 icount.rx = cnow.rx;
1667 icount.tx = cnow.tx;
1668 icount.frame = cnow.frame;
1669 icount.overrun = cnow.overrun;
1670 icount.parity = cnow.parity;
1671 icount.brk = cnow.brk;
1672 icount.buf_overrun = cnow.buf_overrun;
1673
1674 return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
1675}
1676
72dc1c09
GKH		 1677
1678static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1679{
542f5482 1680 int retval;
72dc1c09 1681 struct hso_serial *serial = get_serial_by_tty(tty);
542f5482
DJB		 1682 struct hso_tiocmget *tiocmget;
1683 u16 UART_state_bitmap;
72dc1c09
GKH		 1684
1685 /* sanity check */
1686 if (!serial) {
1687 D1("no tty structures");
1688 return -EINVAL;
1689 }
542f5482
DJB		 1690 spin_lock_irq(&serial->serial_lock);
1691 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
72dc1c09 1692 ((serial->dtr_state) ? TIOCM_DTR : 0);
542f5482
DJB		 1693 tiocmget = serial->tiocmget;
1694 if (tiocmget) {
1695
1696 UART_state_bitmap = le16_to_cpu(
1697 tiocmget->prev_UART_state_bitmap);
1698 if (UART_state_bitmap & B_RING_SIGNAL)
1699 retval |= TIOCM_RNG;
1700 if (UART_state_bitmap & B_RX_CARRIER)
1701 retval |= TIOCM_CD;
1702 if (UART_state_bitmap & B_TX_CARRIER)
1703 retval |= TIOCM_DSR;
1704 }
1705 spin_unlock_irq(&serial->serial_lock);
1706 return retval;
72dc1c09
GKH		 1707}
1708
1709static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1710 unsigned int set, unsigned int clear)
1711{
1712 int val = 0;
1713 unsigned long flags;
1714 int if_num;
1715 struct hso_serial *serial = get_serial_by_tty(tty);
1716
1717 /* sanity check */
1718 if (!serial) {
1719 D1("no tty structures");
1720 return -EINVAL;
1721 }
0e0367e9
JD		 1722
1723 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1724 return -EINVAL;
1725
72dc1c09
GKH		 1726 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1727
1728 spin_lock_irqsave(&serial->serial_lock, flags);
1729 if (set & TIOCM_RTS)
1730 serial->rts_state = 1;
1731 if (set & TIOCM_DTR)
1732 serial->dtr_state = 1;
1733
1734 if (clear & TIOCM_RTS)
1735 serial->rts_state = 0;
1736 if (clear & TIOCM_DTR)
1737 serial->dtr_state = 0;
1738
1739 if (serial->dtr_state)
1740 val |= 0x01;
1741 if (serial->rts_state)
1742 val |= 0x02;
1743
1744 spin_unlock_irqrestore(&serial->serial_lock, flags);
1745
1746 return usb_control_msg(serial->parent->usb,
1747 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1748 0x21, val, if_num, NULL, 0,
1749 USB_CTRL_SET_TIMEOUT);
1750}
1751
542f5482
DJB		 1752static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1753 unsigned int cmd, unsigned long arg)
1754{
1755 struct hso_serial *serial = get_serial_by_tty(tty);
1756 void __user *uarg = (void __user *)arg;
1757 int ret = 0;
1758 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1759
1760 if (!serial)
1761 return -ENODEV;
1762 switch (cmd) {
1763 case TIOCMIWAIT:
1764 ret = hso_wait_modem_status(serial, arg);
1765 break;
1766
1767 case TIOCGICOUNT:
1768 ret = hso_get_count(serial, uarg);
1769 break;
1770 default:
1771 ret = -ENOIOCTLCMD;
1772 break;
1773 }
1774 return ret;
1775}
1776
1777
72dc1c09
GKH		 1778/* starts a transmit */
1779static void hso_kick_transmit(struct hso_serial *serial)
1780{
1781 u8 *temp;
1782 unsigned long flags;
1783 int res;
1784
1785 spin_lock_irqsave(&serial->serial_lock, flags);
1786 if (!serial->tx_buffer_count)
1787 goto out;
1788
1789 if (serial->tx_urb_used)
1790 goto out;
1791
1792 /* Wakeup USB interface if necessary */
1793 if (hso_get_activity(serial->parent) == -EAGAIN)
1794 goto out;
1795
1796 /* Switch pointers around to avoid memcpy */
1797 temp = serial->tx_buffer;
1798 serial->tx_buffer = serial->tx_data;
1799 serial->tx_data = temp;
1800 serial->tx_data_count = serial->tx_buffer_count;
1801 serial->tx_buffer_count = 0;
1802
1803 /* If temp is set, it means we switched buffers */
1804 if (temp && serial->write_data) {
1805 res = serial->write_data(serial);
1806 if (res >= 0)
1807 serial->tx_urb_used = 1;
1808 }
1809out:
1810 spin_unlock_irqrestore(&serial->serial_lock, flags);
1811}
1812
1813/* make a request (for reading and writing data to muxed serial port) */
1814static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1815 struct urb *ctrl_urb,
1816 struct usb_ctrlrequest *ctrl_req,
1817 u8 *ctrl_urb_data, u32 size)
1818{
1819 int result;
1820 int pipe;
1821
1822 /* Sanity check */
1823 if (!serial || !ctrl_urb || !ctrl_req) {
1824 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1825 return -EINVAL;
1826 }
1827
1828 /* initialize */
1829 ctrl_req->wValue = 0;
b74f62c1
DJB		 1830 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1831 ctrl_req->wLength = cpu_to_le16(size);
72dc1c09
GKH		 1832
1833 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1834 /* Reading command */
1835 ctrl_req->bRequestType = USB_DIR_IN |
1836 USB_TYPE_OPTION_VENDOR |
1837 USB_RECIP_INTERFACE;
1838 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1839 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1840 } else {
1841 /* Writing command */
1842 ctrl_req->bRequestType = USB_DIR_OUT |
1843 USB_TYPE_OPTION_VENDOR |
1844 USB_RECIP_INTERFACE;
1845 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1846 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1847 }
1848 /* syslog */
1849 D2("%s command (%02x) len: %d, port: %d",
1850 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1851 ctrl_req->bRequestType, ctrl_req->wLength, port);
1852
1853 /* Load ctrl urb */
1854 ctrl_urb->transfer_flags = 0;
1855 usb_fill_control_urb(ctrl_urb,
1856 serial->parent->usb,
1857 pipe,
1858 (u8 *) ctrl_req,
1859 ctrl_urb_data, size, ctrl_callback, serial);
1860 /* Send it on merry way */
1861 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1862 if (result) {
1863 dev_err(&ctrl_urb->dev->dev,
8a5c9c49 1864 "%s failed submit ctrl_urb %d type %d\n", __func__,
72dc1c09
GKH		 1865 result, type);
1866 return result;
1867 }
1868
1869 /* done */
1870 return size;
1871}
1872
1873/* called by intr_callback when read occurs */
1874static int hso_mux_serial_read(struct hso_serial *serial)
1875{
1876 if (!serial)
1877 return -EINVAL;
1878
1879 /* clean data */
1880 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1881 /* make the request */
1882
1883 if (serial->num_rx_urbs != 1) {
1884 dev_err(&serial->parent->interface->dev,
1885 "ERROR: mux'd reads with multiple buffers "
1886 "not possible\n");
1887 return 0;
1888 }
1889 return mux_device_request(serial,
1890 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1891 serial->parent->port_spec & HSO_PORT_MASK,
1892 serial->rx_urb[0],
1893 &serial->ctrl_req_rx,
1894 serial->rx_data[0], serial->rx_data_length);
1895}
1896
1897/* used for muxed serial port callback (muxed serial read) */
1898static void intr_callback(struct urb *urb)
1899{
1900 struct hso_shared_int *shared_int = urb->context;
1901 struct hso_serial *serial;
1902 unsigned char *port_req;
1903 int status = urb->status;
1904 int i;
1905
1906 usb_mark_last_busy(urb->dev);
1907
1908 /* sanity check */
1909 if (!shared_int)
1910 return;
1911
1912 /* status check */
1913 if (status) {
68a351c5 1914 handle_usb_error(status, __func__, NULL);
72dc1c09
GKH		 1915 return;
1916 }
1917 D4("\n--- Got intr callback 0x%02X ---", status);
1918
1919 /* what request? */
1920 port_req = urb->transfer_buffer;
1921 D4(" port_req = 0x%.2X\n", *port_req);
1922 /* loop over all muxed ports to find the one sending this */
1923 for (i = 0; i < 8; i++) {
1924 /* max 8 channels on MUX */
1925 if (*port_req & (1 << i)) {
1926 serial = get_serial_by_shared_int_and_type(shared_int,
1927 (1 << i));
1928 if (serial != NULL) {
1929 D1("Pending read interrupt on port %d\n", i);
8ef5ba63 1930 spin_lock(&serial->serial_lock);
f4763e96
JD		 1931 if (serial->rx_state == RX_IDLE &&
1932 serial->open_count > 0) {
72dc1c09
GKH		 1933 /* Setup and send a ctrl req read on
1934 * port i */
f4763e96 1935 if (!serial->rx_urb_filled[0]) {
8ef5ba63
DJB		 1936 serial->rx_state = RX_SENT;
1937 hso_mux_serial_read(serial);
1938 } else
1939 serial->rx_state = RX_PENDING;
72dc1c09 1940 } else {
f4763e96
JD		 1941 D1("Already a read pending on "
1942 "port %d or port not open\n", i);
72dc1c09 1943 }
8ef5ba63 1944 spin_unlock(&serial->serial_lock);
72dc1c09
GKH		 1945 }
1946 }
1947 }
1948 /* Resubmit interrupt urb */
1949 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1950}
1951
1952/* called for writing to muxed serial port */
1953static int hso_mux_serial_write_data(struct hso_serial *serial)
1954{
1955 if (NULL == serial)
1956 return -EINVAL;
1957
1958 return mux_device_request(serial,
1959 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1960 serial->parent->port_spec & HSO_PORT_MASK,
1961 serial->tx_urb,
1962 &serial->ctrl_req_tx,
1963 serial->tx_data, serial->tx_data_count);
1964}
1965
1966/* write callback for Diag and CS port */
1967static void hso_std_serial_write_bulk_callback(struct urb *urb)
1968{
1969 struct hso_serial *serial = urb->context;
1970 int status = urb->status;
e136e303 1971 struct tty_struct *tty;
72dc1c09
GKH		 1972
1973 /* sanity check */
1974 if (!serial) {
1975 D1("serial == NULL");
1976 return;
1977 }
1978
1979 spin_lock(&serial->serial_lock);
1980 serial->tx_urb_used = 0;
e136e303 1981 tty = tty_kref_get(serial->tty);
72dc1c09
GKH		 1982 spin_unlock(&serial->serial_lock);
1983 if (status) {
68a351c5 1984 handle_usb_error(status, __func__, serial->parent);
e136e303 1985 tty_kref_put(tty);
72dc1c09
GKH		 1986 return;
1987 }
1988 hso_put_activity(serial->parent);
e136e303
AC		 1989 if (tty) {
1990 tty_wakeup(tty);
1991 tty_kref_put(tty);
1992 }
72dc1c09
GKH		 1993 hso_kick_transmit(serial);
1994
1995 D1(" ");
72dc1c09
GKH		 1996}
1997
1998/* called for writing diag or CS serial port */
1999static int hso_std_serial_write_data(struct hso_serial *serial)
2000{
2001 int count = serial->tx_data_count;
2002 int result;
2003
2004 usb_fill_bulk_urb(serial->tx_urb,
2005 serial->parent->usb,
2006 usb_sndbulkpipe(serial->parent->usb,
2007 serial->out_endp->
2008 bEndpointAddress & 0x7F),
2009 serial->tx_data, serial->tx_data_count,
2010 hso_std_serial_write_bulk_callback, serial);
2011
2012 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
2013 if (result) {
2014 dev_warn(&serial->parent->usb->dev,
2015 "Failed to submit urb - res %d\n", result);
2016 return result;
2017 }
2018
2019 return count;
2020}
2021
2022/* callback after read or write on muxed serial port */
2023static void ctrl_callback(struct urb *urb)
2024{
2025 struct hso_serial *serial = urb->context;
2026 struct usb_ctrlrequest *req;
2027 int status = urb->status;
e136e303 2028 struct tty_struct *tty;
72dc1c09
GKH		 2029
2030 /* sanity check */
2031 if (!serial)
2032 return;
2033
2034 spin_lock(&serial->serial_lock);
2035 serial->tx_urb_used = 0;
e136e303 2036 tty = tty_kref_get(serial->tty);
72dc1c09
GKH		 2037 spin_unlock(&serial->serial_lock);
2038 if (status) {
68a351c5 2039 handle_usb_error(status, __func__, serial->parent);
e136e303 2040 tty_kref_put(tty);
72dc1c09
GKH		 2041 return;
2042 }
2043
2044 /* what request? */
2045 req = (struct usb_ctrlrequest *)(urb->setup_packet);
2046 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2047 D4("Actual length of urb = %d\n", urb->actual_length);
2048 DUMP1(urb->transfer_buffer, urb->actual_length);
2049
2050 if (req->bRequestType ==
2051 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2052 /* response to a read command */
8ef5ba63
DJB		 2053 serial->rx_urb_filled[0] = 1;
2054 spin_lock(&serial->serial_lock);
2055 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2056 spin_unlock(&serial->serial_lock);
72dc1c09
GKH		 2057 } else {
2058 hso_put_activity(serial->parent);
e136e303
AC		 2059 if (tty)
2060 tty_wakeup(tty);
72dc1c09
GKH		 2061 /* response to a write command */
2062 hso_kick_transmit(serial);
2063 }
e136e303 2064 tty_kref_put(tty);
72dc1c09
GKH		 2065}
2066
2067/* handle RX data for serial port */
8ef5ba63 2068static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
72dc1c09 2069{
e136e303 2070 struct tty_struct *tty;
8ef5ba63
DJB		 2071 int write_length_remaining = 0;
2072 int curr_write_len;
e136e303 2073
72dc1c09
GKH		 2074 /* Sanity check */
2075 if (urb == NULL || serial == NULL) {
2076 D1("serial = NULL");
8ef5ba63 2077 return -2;
72dc1c09
GKH		 2078 }
2079
d45eb81c 2080 /* All callers to put_rxbuf_data hold serial_lock */
e136e303 2081 tty = tty_kref_get(serial->tty);
e136e303 2082
72dc1c09 2083 /* Push data to tty */
8ef5ba63
DJB		 2084 if (tty) {
2085 write_length_remaining = urb->actual_length -
2086 serial->curr_rx_urb_offset;
72dc1c09 2087 D1("data to push to tty");
8ef5ba63 2088 while (write_length_remaining) {
5839b414
DJB		 2089 if (test_bit(TTY_THROTTLED, &tty->flags)) {
2090 tty_kref_put(tty);
8ef5ba63 2091 return -1;
5839b414 2092 }
8ef5ba63
DJB		 2093 curr_write_len = tty_insert_flip_string
2094 (tty, urb->transfer_buffer +
2095 serial->curr_rx_urb_offset,
2096 write_length_remaining);
2097 serial->curr_rx_urb_offset += curr_write_len;
2098 write_length_remaining -= curr_write_len;
2099 tty_flip_buffer_push(tty);
72dc1c09 2100 }
72dc1c09 2101 }
8ef5ba63
DJB		 2102 if (write_length_remaining == 0) {
2103 serial->curr_rx_urb_offset = 0;
2104 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
72dc1c09 2105 }
e136e303 2106 tty_kref_put(tty);
8ef5ba63 2107 return write_length_remaining;
72dc1c09
GKH		 2108}
2109
8ef5ba63 2110
72dc1c09
GKH		 2111/* Base driver functions */
2112
2113static void hso_log_port(struct hso_device *hso_dev)
2114{
2115 char *port_type;
2116 char port_dev[20];
2117
2118 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2119 case HSO_PORT_CONTROL:
2120 port_type = "Control";
2121 break;
2122 case HSO_PORT_APP:
2123 port_type = "Application";
2124 break;
2125 case HSO_PORT_GPS:
2126 port_type = "GPS";
2127 break;
2128 case HSO_PORT_GPS_CONTROL:
2129 port_type = "GPS control";
2130 break;
2131 case HSO_PORT_APP2:
2132 port_type = "Application2";
2133 break;
2134 case HSO_PORT_PCSC:
2135 port_type = "PCSC";
2136 break;
2137 case HSO_PORT_DIAG:
2138 port_type = "Diagnostic";
2139 break;
2140 case HSO_PORT_DIAG2:
2141 port_type = "Diagnostic2";
2142 break;
2143 case HSO_PORT_MODEM:
2144 port_type = "Modem";
2145 break;
2146 case HSO_PORT_NETWORK:
2147 port_type = "Network";
2148 break;
2149 default:
2150 port_type = "Unknown";
2151 break;
2152 }
2153 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2154 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2155 } else
2156 sprintf(port_dev, "/dev/%s%d", tty_filename,
2157 dev2ser(hso_dev)->minor);
2158
2159 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2160 port_type, port_dev);
2161}
2162
2163static int hso_start_net_device(struct hso_device *hso_dev)
2164{
2165 int i, result = 0;
2166 struct hso_net *hso_net = dev2net(hso_dev);
2167
2168 if (!hso_net)
2169 return -ENODEV;
2170
2171 /* send URBs for all read buffers */
2172 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2173
2174 /* Prep a receive URB */
2175 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2176 hso_dev->usb,
2177 usb_rcvbulkpipe(hso_dev->usb,
2178 hso_net->in_endp->
2179 bEndpointAddress & 0x7F),
2180 hso_net->mux_bulk_rx_buf_pool[i],
2181 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2182 hso_net);
2183
2184 /* Put it out there so the device can send us stuff */
2185 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2186 GFP_NOIO);
2187 if (result)
2188 dev_warn(&hso_dev->usb->dev,
2189 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2190 i, result);
2191 }
2192
2193 return result;
2194}
2195
2196static int hso_stop_net_device(struct hso_device *hso_dev)
2197{
2198 int i;
2199 struct hso_net *hso_net = dev2net(hso_dev);
2200
2201 if (!hso_net)
2202 return -ENODEV;
2203
2204 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2205 if (hso_net->mux_bulk_rx_urb_pool[i])
2206 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2207
2208 }
2209 if (hso_net->mux_bulk_tx_urb)
2210 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2211
2212 return 0;
2213}
2214
2215static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2216{
2217 int i, result = 0;
2218 struct hso_serial *serial = dev2ser(hso_dev);
2219
2220 if (!serial)
2221 return -ENODEV;
2222
2223 /* If it is not the MUX port fill in and submit a bulk urb (already
2224 * allocated in hso_serial_start) */
2225 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2226 for (i = 0; i < serial->num_rx_urbs; i++) {
2227 usb_fill_bulk_urb(serial->rx_urb[i],
2228 serial->parent->usb,
2229 usb_rcvbulkpipe(serial->parent->usb,
2230 serial->in_endp->
2231 bEndpointAddress &
2232 0x7F),
2233 serial->rx_data[i],
2234 serial->rx_data_length,
2235 hso_std_serial_read_bulk_callback,
2236 serial);
2237 result = usb_submit_urb(serial->rx_urb[i], flags);
2238 if (result) {
2239 dev_warn(&serial->parent->usb->dev,
2240 "Failed to submit urb - res %d\n",
2241 result);
2242 break;
2243 }
2244 }
2245 } else {
2246 mutex_lock(&serial->shared_int->shared_int_lock);
2247 if (!serial->shared_int->use_count) {
2248 result =
2249 hso_mux_submit_intr_urb(serial->shared_int,
2250 hso_dev->usb, flags);
2251 }
2252 serial->shared_int->use_count++;
2253 mutex_unlock(&serial->shared_int->shared_int_lock);
2254 }
542f5482
DJB		 2255 if (serial->tiocmget)
2256 tiocmget_submit_urb(serial,
2257 serial->tiocmget,
2258 serial->parent->usb);
72dc1c09
GKH		 2259 return result;
2260}
2261
2262static int hso_stop_serial_device(struct hso_device *hso_dev)
2263{
2264 int i;
2265 struct hso_serial *serial = dev2ser(hso_dev);
542f5482 2266 struct hso_tiocmget *tiocmget;
72dc1c09
GKH		 2267
2268 if (!serial)
2269 return -ENODEV;
2270
2271 for (i = 0; i < serial->num_rx_urbs; i++) {
8ef5ba63 2272 if (serial->rx_urb[i]) {
72dc1c09 2273 usb_kill_urb(serial->rx_urb[i]);
8ef5ba63
DJB		 2274 serial->rx_urb_filled[i] = 0;
2275 }
72dc1c09 2276 }
8ef5ba63
DJB		 2277 serial->curr_rx_urb_idx = 0;
2278 serial->curr_rx_urb_offset = 0;
72dc1c09
GKH		 2279
2280 if (serial->tx_urb)
2281 usb_kill_urb(serial->tx_urb);
2282
2283 if (serial->shared_int) {
2284 mutex_lock(&serial->shared_int->shared_int_lock);
2285 if (serial->shared_int->use_count &&
2286 (--serial->shared_int->use_count == 0)) {
2287 struct urb *urb;
2288
2289 urb = serial->shared_int->shared_intr_urb;
2290 if (urb)
2291 usb_kill_urb(urb);
2292 }
2293 mutex_unlock(&serial->shared_int->shared_int_lock);
2294 }
542f5482
DJB		 2295 tiocmget = serial->tiocmget;
2296 if (tiocmget) {
2297 wake_up_interruptible(&tiocmget->waitq);
2298 usb_kill_urb(tiocmget->urb);
2299 }
72dc1c09
GKH		 2300
2301 return 0;
2302}
2303
2304static void hso_serial_common_free(struct hso_serial *serial)
2305{
2306 int i;
2307
2308 if (serial->parent->dev)
2309 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2310
2311 tty_unregister_device(tty_drv, serial->minor);
2312
2313 for (i = 0; i < serial->num_rx_urbs; i++) {
2314 /* unlink and free RX URB */
2315 usb_free_urb(serial->rx_urb[i]);
2316 /* free the RX buffer */
2317 kfree(serial->rx_data[i]);
2318 }
2319
2320 /* unlink and free TX URB */
2321 usb_free_urb(serial->tx_urb);
2322 kfree(serial->tx_data);
2323}
2324
2325static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2326 int rx_size, int tx_size)
2327{
2328 struct device *dev;
2329 int minor;
2330 int i;
2331
2332 minor = get_free_serial_index();
2333 if (minor < 0)
2334 goto exit;
2335
2336 /* register our minor number */
2337 serial->parent->dev = tty_register_device(tty_drv, minor,
2338 &serial->parent->interface->dev);
2339 dev = serial->parent->dev;
1aec5bdf 2340 dev_set_drvdata(dev, serial->parent);
72dc1c09
GKH		 2341 i = device_create_file(dev, &dev_attr_hsotype);
2342
2343 /* fill in specific data for later use */
2344 serial->minor = minor;
2345 serial->magic = HSO_SERIAL_MAGIC;
2346 spin_lock_init(&serial->serial_lock);
2347 serial->num_rx_urbs = num_urbs;
2348
2349 /* RX, allocate urb and initialize */
2350
2351 /* prepare our RX buffer */
2352 serial->rx_data_length = rx_size;
2353 for (i = 0; i < serial->num_rx_urbs; i++) {
2354 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2355 if (!serial->rx_urb[i]) {
2356 dev_err(dev, "Could not allocate urb?\n");
2357 goto exit;
2358 }
2359 serial->rx_urb[i]->transfer_buffer = NULL;
2360 serial->rx_urb[i]->transfer_buffer_length = 0;
2361 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2362 GFP_KERNEL);
2363 if (!serial->rx_data[i]) {
2364 dev_err(dev, "%s - Out of memory\n", __func__);
2365 goto exit;
2366 }
2367 }
2368
2369 /* TX, allocate urb and initialize */
2370 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2371 if (!serial->tx_urb) {
2372 dev_err(dev, "Could not allocate urb?\n");
2373 goto exit;
2374 }
2375 serial->tx_urb->transfer_buffer = NULL;
2376 serial->tx_urb->transfer_buffer_length = 0;
2377 /* prepare our TX buffer */
2378 serial->tx_data_count = 0;
2379 serial->tx_buffer_count = 0;
2380 serial->tx_data_length = tx_size;
2381 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2382 if (!serial->tx_data) {
8a5c9c49 2383 dev_err(dev, "%s - Out of memory\n", __func__);
72dc1c09
GKH		 2384 goto exit;
2385 }
2386 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2387 if (!serial->tx_buffer) {
8a5c9c49 2388 dev_err(dev, "%s - Out of memory\n", __func__);
72dc1c09
GKH		 2389 goto exit;
2390 }
2391
2392 return 0;
2393exit:
2394 hso_serial_common_free(serial);
2395 return -1;
2396}
2397
72dc1c09
GKH		 2398/* Creates a general hso device */
2399static struct hso_device *hso_create_device(struct usb_interface *intf,
2400 int port_spec)
2401{
2402 struct hso_device *hso_dev;
2403
2404 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2405 if (!hso_dev)
2406 return NULL;
2407
2408 hso_dev->port_spec = port_spec;
2409 hso_dev->usb = interface_to_usbdev(intf);
2410 hso_dev->interface = intf;
2411 kref_init(&hso_dev->ref);
ab153d84
DM		 2412 mutex_init(&hso_dev->mutex);
2413
72dc1c09
GKH		 2414 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2415 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
68a351c5 2416 INIT_WORK(&hso_dev->reset_device, reset_device);
72dc1c09
GKH		 2417
2418 return hso_dev;
2419}
2420
2421/* Removes a network device in the network device table */
2422static int remove_net_device(struct hso_device *hso_dev)
2423{
2424 int i;
2425
2426 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2427 if (network_table[i] == hso_dev) {
2428 network_table[i] = NULL;
2429 break;
2430 }
2431 }
2432 if (i == HSO_MAX_NET_DEVICES)
2433 return -1;
2434 return 0;
2435}
2436
2437/* Frees our network device */
2438static void hso_free_net_device(struct hso_device *hso_dev)
2439{
2440 int i;
2441 struct hso_net *hso_net = dev2net(hso_dev);
2442
2443 if (!hso_net)
2444 return;
2445
3b7d2b31
JD		 2446 remove_net_device(hso_net->parent);
2447
2448 if (hso_net->net) {
2449 unregister_netdev(hso_net->net);
2450 free_netdev(hso_net->net);
2451 }
2452
72dc1c09
GKH		 2453 /* start freeing */
2454 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2455 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2456 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
3b7d2b31 2457 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
72dc1c09
GKH		 2458 }
2459 usb_free_urb(hso_net->mux_bulk_tx_urb);
2460 kfree(hso_net->mux_bulk_tx_buf);
3b7d2b31 2461 hso_net->mux_bulk_tx_buf = NULL;
ab153d84 2462
e44578ea 2463 kfree(hso_dev);
72dc1c09
GKH		 2464}
2465
c266cb4e
SH		 2466static const struct net_device_ops hso_netdev_ops = {
2467 .ndo_open = hso_net_open,
2468 .ndo_stop = hso_net_close,
2469 .ndo_start_xmit = hso_net_start_xmit,
2470 .ndo_tx_timeout = hso_net_tx_timeout,
2471};
2472
72dc1c09
GKH		 2473/* initialize the network interface */
2474static void hso_net_init(struct net_device *net)
2475{
2476 struct hso_net *hso_net = netdev_priv(net);
2477
2478 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2479
2480 /* fill in the other fields */
c266cb4e 2481 net->netdev_ops = &hso_netdev_ops;
72dc1c09
GKH		 2482 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2483 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2484 net->type = ARPHRD_NONE;
2485 net->mtu = DEFAULT_MTU - 14;
2486 net->tx_queue_len = 10;
2487 SET_ETHTOOL_OPS(net, &ops);
2488
2489 /* and initialize the semaphore */
2490 spin_lock_init(&hso_net->net_lock);
2491}
2492
2493/* Adds a network device in the network device table */
2494static int add_net_device(struct hso_device *hso_dev)
2495{
2496 int i;
2497
2498 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2499 if (network_table[i] == NULL) {
2500 network_table[i] = hso_dev;
2501 break;
2502 }
2503 }
2504 if (i == HSO_MAX_NET_DEVICES)
2505 return -1;
2506 return 0;
2507}
2508
19d337df 2509static int hso_rfkill_set_block(void *data, bool blocked)
72dc1c09
GKH		 2510{
2511 struct hso_device *hso_dev = data;
19d337df 2512 int enabled = !blocked;
72dc1c09
GKH		 2513 int rv;
2514
ab153d84 2515 mutex_lock(&hso_dev->mutex);
72dc1c09
GKH		 2516 if (hso_dev->usb_gone)
2517 rv = 0;
2518 else
2519 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2520 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2521 USB_CTRL_SET_TIMEOUT);
ab153d84 2522 mutex_unlock(&hso_dev->mutex);
72dc1c09
GKH		 2523 return rv;
2524}
2525
19d337df
JB		 2526static const struct rfkill_ops hso_rfkill_ops = {
2527 .set_block = hso_rfkill_set_block,
2528};
2529
72dc1c09
GKH		 2530/* Creates and sets up everything for rfkill */
2531static void hso_create_rfkill(struct hso_device *hso_dev,
2532 struct usb_interface *interface)
2533{
2534 struct hso_net *hso_net = dev2net(hso_dev);
939a9516 2535 struct device *dev = &hso_net->net->dev;
72dc1c09
GKH		 2536 char *rfkn;
2537
72dc1c09 2538 rfkn = kzalloc(20, GFP_KERNEL);
19d337df 2539 if (!rfkn)
939a9516 2540 dev_err(dev, "%s - Out of memory\n", __func__);
19d337df 2541
72dc1c09
GKH		 2542 snprintf(rfkn, 20, "hso-%d",
2543 interface->altsetting->desc.bInterfaceNumber);
19d337df
JB		 2544
2545 hso_net->rfkill = rfkill_alloc(rfkn,
2546 &interface_to_usbdev(interface)->dev,
2547 RFKILL_TYPE_WWAN,
2548 &hso_rfkill_ops, hso_dev);
2549 if (!hso_net->rfkill) {
2550 dev_err(dev, "%s - Out of memory\n", __func__);
2551 kfree(rfkn);
2552 return;
2553 }
72dc1c09 2554 if (rfkill_register(hso_net->rfkill) < 0) {
19d337df 2555 rfkill_destroy(hso_net->rfkill);
72dc1c09 2556 kfree(rfkn);
939a9516
JM		 2557 hso_net->rfkill = NULL;
2558 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
72dc1c09
GKH		 2559 return;
2560 }
2561}
2562
384912ed
MH		 2563static struct device_type hso_type = {
2564 .name = "wwan",
2565};
2566
72dc1c09 2567/* Creates our network device */
0de8ca59
JD		 2568static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2569 int port_spec)
72dc1c09
GKH		 2570{
2571 int result, i;
2572 struct net_device *net;
2573 struct hso_net *hso_net;
2574 struct hso_device *hso_dev;
2575
0de8ca59 2576 hso_dev = hso_create_device(interface, port_spec);
72dc1c09
GKH		 2577 if (!hso_dev)
2578 return NULL;
2579
2580 /* allocate our network device, then we can put in our private data */
2581 /* call hso_net_init to do the basic initialization */
2582 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2583 if (!net) {
2584 dev_err(&interface->dev, "Unable to create ethernet device\n");
2585 goto exit;
2586 }
2587
2588 hso_net = netdev_priv(net);
2589
2590 hso_dev->port_data.dev_net = hso_net;
2591 hso_net->net = net;
2592 hso_net->parent = hso_dev;
2593
2594 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2595 USB_DIR_IN);
2596 if (!hso_net->in_endp) {
2597 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2598 goto exit;
2599 }
2600 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2601 USB_DIR_OUT);
2602 if (!hso_net->out_endp) {
2603 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2604 goto exit;
2605 }
2606 SET_NETDEV_DEV(net, &interface->dev);
384912ed 2607 SET_NETDEV_DEVTYPE(net, &hso_type);
72dc1c09
GKH		 2608
2609 /* registering our net device */
2610 result = register_netdev(net);
2611 if (result) {
2612 dev_err(&interface->dev, "Failed to register device\n");
2613 goto exit;
2614 }
2615
2616 /* start allocating */
2617 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2618 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2619 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2620 dev_err(&interface->dev, "Could not allocate rx urb\n");
2621 goto exit;
2622 }
2623 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2624 GFP_KERNEL);
2625 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2626 dev_err(&interface->dev, "Could not allocate rx buf\n");
2627 goto exit;
2628 }
2629 }
2630 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2631 if (!hso_net->mux_bulk_tx_urb) {
2632 dev_err(&interface->dev, "Could not allocate tx urb\n");
2633 goto exit;
2634 }
2635 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2636 if (!hso_net->mux_bulk_tx_buf) {
2637 dev_err(&interface->dev, "Could not allocate tx buf\n");
2638 goto exit;
2639 }
2640
2641 add_net_device(hso_dev);
2642
2643 hso_log_port(hso_dev);
2644
2645 hso_create_rfkill(hso_dev, interface);
2646
2647 return hso_dev;
2648exit:
2649 hso_free_net_device(hso_dev);
2650 return NULL;
2651}
2652
542f5482
DJB		 2653static void hso_free_tiomget(struct hso_serial *serial)
2654{
2655 struct hso_tiocmget *tiocmget = serial->tiocmget;
2656 if (tiocmget) {
542f5482
DJB		 2657 if (tiocmget->urb) {
2658 usb_free_urb(tiocmget->urb);
2659 tiocmget->urb = NULL;
2660 }
2661 serial->tiocmget = NULL;
3b7d2b31 2662 kfree(tiocmget);
542f5482
DJB		 2663
2664 }
2665}
2666
72dc1c09
GKH		 2667/* Frees an AT channel ( goes for both mux and non-mux ) */
2668static void hso_free_serial_device(struct hso_device *hso_dev)
2669{
2670 struct hso_serial *serial = dev2ser(hso_dev);
2671
2672 if (!serial)
2673 return;
2674 set_serial_by_index(serial->minor, NULL);
2675
2676 hso_serial_common_free(serial);
2677
2678 if (serial->shared_int) {
2679 mutex_lock(&serial->shared_int->shared_int_lock);
2680 if (--serial->shared_int->ref_count == 0)
2681 hso_free_shared_int(serial->shared_int);
2682 else
2683 mutex_unlock(&serial->shared_int->shared_int_lock);
2684 }
542f5482 2685 hso_free_tiomget(serial);
72dc1c09 2686 kfree(serial);
e44578ea 2687 kfree(hso_dev);
72dc1c09
GKH		 2688}
2689
2690/* Creates a bulk AT channel */
2691static struct hso_device *hso_create_bulk_serial_device(
2692 struct usb_interface *interface, int port)
2693{
2694 struct hso_device *hso_dev;
2695 struct hso_serial *serial;
2696 int num_urbs;
542f5482 2697 struct hso_tiocmget *tiocmget;
72dc1c09
GKH		 2698
2699 hso_dev = hso_create_device(interface, port);
2700 if (!hso_dev)
2701 return NULL;
2702
2703 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2704 if (!serial)
2705 goto exit;
2706
2707 serial->parent = hso_dev;
2708 hso_dev->port_data.dev_serial = serial;
2709
58eb17f1 2710 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
72dc1c09 2711 num_urbs = 2;
542f5482
DJB		 2712 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2713 GFP_KERNEL);
2714 /* it isn't going to break our heart if serial->tiocmget
2715 * allocation fails don't bother checking this.
2716 */
2717 if (serial->tiocmget) {
2718 tiocmget = serial->tiocmget;
2719 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2720 if (tiocmget->urb) {
2721 mutex_init(&tiocmget->mutex);
2722 init_waitqueue_head(&tiocmget->waitq);
2723 tiocmget->endp = hso_get_ep(
2724 interface,
2725 USB_ENDPOINT_XFER_INT,
2726 USB_DIR_IN);
2727 } else
2728 hso_free_tiomget(serial);
2729 }
2730 }
72dc1c09
GKH		 2731 else
2732 num_urbs = 1;
2733
2734 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2735 BULK_URB_TX_SIZE))
2736 goto exit;
2737
2738 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2739 USB_DIR_IN);
2740 if (!serial->in_endp) {
2741 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
e57b641d 2742 goto exit2;
72dc1c09
GKH		 2743 }
2744
2745 if (!
2746 (serial->out_endp =
2747 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2748 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
e57b641d 2749 goto exit2;
72dc1c09
GKH		 2750 }
2751
2752 serial->write_data = hso_std_serial_write_data;
2753
2754 /* and record this serial */
2755 set_serial_by_index(serial->minor, serial);
2756
2757 /* setup the proc dirs and files if needed */
2758 hso_log_port(hso_dev);
2759
2760 /* done, return it */
2761 return hso_dev;
e57b641d
AB		 2762
2763exit2:
2764 hso_serial_common_free(serial);
72dc1c09 2765exit:
542f5482 2766 hso_free_tiomget(serial);
72dc1c09 2767 kfree(serial);
e44578ea 2768 kfree(hso_dev);
72dc1c09
GKH		 2769 return NULL;
2770}
2771
2772/* Creates a multiplexed AT channel */
2773static
2774struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2775 int port,
2776 struct hso_shared_int *mux)
2777{
2778 struct hso_device *hso_dev;
2779 struct hso_serial *serial;
2780 int port_spec;
2781
2782 port_spec = HSO_INTF_MUX;
2783 port_spec &= ~HSO_PORT_MASK;
2784
2785 port_spec |= hso_mux_to_port(port);
2786 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2787 return NULL;
2788
2789 hso_dev = hso_create_device(interface, port_spec);
2790 if (!hso_dev)
2791 return NULL;
2792
2793 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2794 if (!serial)
2795 goto exit;
2796
2797 hso_dev->port_data.dev_serial = serial;
2798 serial->parent = hso_dev;
2799
2800 if (hso_serial_common_create
2801 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2802 goto exit;
2803
2804 serial->tx_data_length--;
2805 serial->write_data = hso_mux_serial_write_data;
2806
2807 serial->shared_int = mux;
2808 mutex_lock(&serial->shared_int->shared_int_lock);
2809 serial->shared_int->ref_count++;
2810 mutex_unlock(&serial->shared_int->shared_int_lock);
2811
2812 /* and record this serial */
2813 set_serial_by_index(serial->minor, serial);
2814
2815 /* setup the proc dirs and files if needed */
2816 hso_log_port(hso_dev);
2817
2818 /* done, return it */
2819 return hso_dev;
2820
2821exit:
2822 if (serial) {
2823 tty_unregister_device(tty_drv, serial->minor);
2824 kfree(serial);
2825 }
2826 if (hso_dev)
e44578ea 2827 kfree(hso_dev);
72dc1c09
GKH		 2828 return NULL;
2829
2830}
2831
2832static void hso_free_shared_int(struct hso_shared_int *mux)
2833{
2834 usb_free_urb(mux->shared_intr_urb);
2835 kfree(mux->shared_intr_buf);
2836 mutex_unlock(&mux->shared_int_lock);
2837 kfree(mux);
2838}
2839
2840static
2841struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2842{
2843 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2844
2845 if (!mux)
2846 return NULL;
2847
2848 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2849 USB_DIR_IN);
2850 if (!mux->intr_endp) {
2851 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2852 goto exit;
2853 }
2854
2855 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2856 if (!mux->shared_intr_urb) {
8a5c9c49 2857 dev_err(&interface->dev, "Could not allocate intr urb?\n");
72dc1c09
GKH		 2858 goto exit;
2859 }
d9ced80d
JD		 2860 mux->shared_intr_buf =
2861 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2862 GFP_KERNEL);
72dc1c09 2863 if (!mux->shared_intr_buf) {
8a5c9c49 2864 dev_err(&interface->dev, "Could not allocate intr buf?\n");
72dc1c09
GKH		 2865 goto exit;
2866 }
2867
2868 mutex_init(&mux->shared_int_lock);
2869
2870 return mux;
2871
2872exit:
2873 kfree(mux->shared_intr_buf);
2874 usb_free_urb(mux->shared_intr_urb);
2875 kfree(mux);
2876 return NULL;
2877}
2878
2879/* Gets the port spec for a certain interface */
2880static int hso_get_config_data(struct usb_interface *interface)
2881{
2882 struct usb_device *usbdev = interface_to_usbdev(interface);
2883 u8 config_data[17];
2884 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2885 s32 result;
2886
2887 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2888 0x86, 0xC0, 0, 0, config_data, 17,
2889 USB_CTRL_SET_TIMEOUT) != 0x11) {
2890 return -EIO;
2891 }
2892
2893 switch (config_data[if_num]) {
2894 case 0x0:
2895 result = 0;
2896 break;
2897 case 0x1:
2898 result = HSO_PORT_DIAG;
2899 break;
2900 case 0x2:
2901 result = HSO_PORT_GPS;
2902 break;
2903 case 0x3:
2904 result = HSO_PORT_GPS_CONTROL;
2905 break;
2906 case 0x4:
2907 result = HSO_PORT_APP;
2908 break;
2909 case 0x5:
2910 result = HSO_PORT_APP2;
2911 break;
2912 case 0x6:
2913 result = HSO_PORT_CONTROL;
2914 break;
2915 case 0x7:
2916 result = HSO_PORT_NETWORK;
2917 break;
2918 case 0x8:
2919 result = HSO_PORT_MODEM;
2920 break;
2921 case 0x9:
2922 result = HSO_PORT_MSD;
2923 break;
2924 case 0xa:
2925 result = HSO_PORT_PCSC;
2926 break;
2927 case 0xb:
2928 result = HSO_PORT_VOICE;
2929 break;
2930 default:
2931 result = 0;
2932 }
2933
2934 if (result)
2935 result |= HSO_INTF_BULK;
2936
2937 if (config_data[16] & 0x1)
2938 result |= HSO_INFO_CRC_BUG;
2939
2940 return result;
2941}
2942
2943/* called once for each interface upon device insertion */
2944static int hso_probe(struct usb_interface *interface,
2945 const struct usb_device_id *id)
2946{
2947 int mux, i, if_num, port_spec;
2948 unsigned char port_mask;
2949 struct hso_device *hso_dev = NULL;
2950 struct hso_shared_int *shared_int;
2951 struct hso_device *tmp_dev = NULL;
2952
2953 if_num = interface->altsetting->desc.bInterfaceNumber;
2954
2955 /* Get the interface/port specification from either driver_info or from
2956 * the device itself */
2957 if (id->driver_info)
2958 port_spec = ((u32 *)(id->driver_info))[if_num];
2959 else
2960 port_spec = hso_get_config_data(interface);
2961
2962 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2963 dev_err(&interface->dev, "Not our interface\n");
2964 return -ENODEV;
2965 }
2966 /* Check if we need to switch to alt interfaces prior to port
2967 * configuration */
2968 if (interface->num_altsetting > 1)
2969 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2970 interface->needs_remote_wakeup = 1;
2971
2972 /* Allocate new hso device(s) */
2973 switch (port_spec & HSO_INTF_MASK) {
2974 case HSO_INTF_MUX:
2975 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2976 /* Create the network device */
2977 if (!disable_net) {
0de8ca59
JD		 2978 hso_dev = hso_create_net_device(interface,
2979 port_spec);
72dc1c09
GKH		 2980 if (!hso_dev)
2981 goto exit;
2982 tmp_dev = hso_dev;
2983 }
2984 }
2985
2986 if (hso_get_mux_ports(interface, &port_mask))
2987 /* TODO: de-allocate everything */
2988 goto exit;
2989
2990 shared_int = hso_create_shared_int(interface);
2991 if (!shared_int)
2992 goto exit;
2993
2994 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2995 if (port_mask & i) {
2996 hso_dev = hso_create_mux_serial_device(
2997 interface, i, shared_int);
2998 if (!hso_dev)
2999 goto exit;
3000 }
3001 }
3002
3003 if (tmp_dev)
3004 hso_dev = tmp_dev;
3005 break;
3006
3007 case HSO_INTF_BULK:
3008 /* It's a regular bulk interface */
8e95a202
JP		 3009 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) &&
3010 !disable_net)
0de8ca59 3011 hso_dev = hso_create_net_device(interface, port_spec);
72dc1c09
GKH		 3012 else
3013 hso_dev =
3014 hso_create_bulk_serial_device(interface, port_spec);
3015 if (!hso_dev)
3016 goto exit;
3017 break;
3018 default:
3019 goto exit;
3020 }
3021
72dc1c09
GKH		 3022 /* save our data pointer in this device */
3023 usb_set_intfdata(interface, hso_dev);
3024
3025 /* done */
3026 return 0;
3027exit:
3028 hso_free_interface(interface);
3029 return -ENODEV;
3030}
3031
3032/* device removed, cleaning up */
3033static void hso_disconnect(struct usb_interface *interface)
3034{
3035 hso_free_interface(interface);
3036
3037 /* remove reference of our private data */
3038 usb_set_intfdata(interface, NULL);
72dc1c09
GKH		 3039}
3040
3041static void async_get_intf(struct work_struct *data)
3042{
3043 struct hso_device *hso_dev =
3044 container_of(data, struct hso_device, async_get_intf);
3045 usb_autopm_get_interface(hso_dev->interface);
3046}
3047
3048static void async_put_intf(struct work_struct *data)
3049{
3050 struct hso_device *hso_dev =
3051 container_of(data, struct hso_device, async_put_intf);
3052 usb_autopm_put_interface(hso_dev->interface);
3053}
3054
3055static int hso_get_activity(struct hso_device *hso_dev)
3056{
3057 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3058 if (!hso_dev->is_active) {
3059 hso_dev->is_active = 1;
3060 schedule_work(&hso_dev->async_get_intf);
3061 }
3062 }
3063
3064 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3065 return -EAGAIN;
3066
3067 usb_mark_last_busy(hso_dev->usb);
3068
3069 return 0;
3070}
3071
3072static int hso_put_activity(struct hso_device *hso_dev)
3073{
3074 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3075 if (hso_dev->is_active) {
3076 hso_dev->is_active = 0;
3077 schedule_work(&hso_dev->async_put_intf);
3078 return -EAGAIN;
3079 }
3080 }
3081 hso_dev->is_active = 0;
3082 return 0;
3083}
3084
3085/* called by kernel when we need to suspend device */
3086static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3087{
3088 int i, result;
3089
3090 /* Stop all serial ports */
3091 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3092 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3093 result = hso_stop_serial_device(serial_table[i]);
3094 if (result)
3095 goto out;
3096 }
3097 }
3098
3099 /* Stop all network ports */
3100 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3101 if (network_table[i] &&
3102 (network_table[i]->interface == iface)) {
3103 result = hso_stop_net_device(network_table[i]);
3104 if (result)
3105 goto out;
3106 }
3107 }
3108
3109out:
3110 return 0;
3111}
3112
3113/* called by kernel when we need to resume device */
3114static int hso_resume(struct usb_interface *iface)
3115{
3116 int i, result = 0;
3117 struct hso_net *hso_net;
3118
3119 /* Start all serial ports */
3120 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3121 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3122 if (dev2ser(serial_table[i])->open_count) {
3123 result =
3124 hso_start_serial_device(serial_table[i], GFP_NOIO);
3125 hso_kick_transmit(dev2ser(serial_table[i]));
3126 if (result)
3127 goto out;
3128 }
3129 }
3130 }
3131
3132 /* Start all network ports */
3133 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3134 if (network_table[i] &&
3135 (network_table[i]->interface == iface)) {
3136 hso_net = dev2net(network_table[i]);
89930b7b
DJB		 3137 if (hso_net->flags & IFF_UP) {
3138 /* First transmit any lingering data,
3139 then restart the device. */
3140 if (hso_net->skb_tx_buf) {
3141 dev_dbg(&iface->dev,
3142 "Transmitting"
3143 " lingering data\n");
3144 hso_net_start_xmit(hso_net->skb_tx_buf,
3145 hso_net->net);
3146 hso_net->skb_tx_buf = NULL;
3147 }
3148 result = hso_start_net_device(network_table[i]);
3149 if (result)
3150 goto out;
72dc1c09 3151 }
72dc1c09
GKH		 3152 }
3153 }
3154
3155out:
3156 return result;
3157}
3158
68a351c5
JD		 3159static void reset_device(struct work_struct *data)
3160{
3161 struct hso_device *hso_dev =
3162 container_of(data, struct hso_device, reset_device);
3163 struct usb_device *usb = hso_dev->usb;
3164 int result;
3165
3166 if (hso_dev->usb_gone) {
3167 D1("No reset during disconnect\n");
3168 } else {
3169 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3170 if (result < 0)
3171 D1("unable to lock device for reset: %d\n", result);
3172 else {
3173 usb_reset_device(usb);
3174 usb_unlock_device(usb);
3175 }
3176 }
3177}
3178
72dc1c09
GKH		 3179static void hso_serial_ref_free(struct kref *ref)
3180{
3181 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3182
3183 hso_free_serial_device(hso_dev);
3184}
3185
3186static void hso_free_interface(struct usb_interface *interface)
3187{
3188 struct hso_serial *hso_dev;
e136e303 3189 struct tty_struct *tty;
72dc1c09
GKH		 3190 int i;
3191
3192 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
8e95a202
JP		 3193 if (serial_table[i] &&
3194 (serial_table[i]->interface == interface)) {
72dc1c09 3195 hso_dev = dev2ser(serial_table[i]);
e136e303
AC		 3196 spin_lock_irq(&hso_dev->serial_lock);
3197 tty = tty_kref_get(hso_dev->tty);
3198 spin_unlock_irq(&hso_dev->serial_lock);
3199 if (tty)
3200 tty_hangup(tty);
ab153d84 3201 mutex_lock(&hso_dev->parent->mutex);
e136e303 3202 tty_kref_put(tty);
72dc1c09 3203 hso_dev->parent->usb_gone = 1;
ab153d84
DM		 3204 mutex_unlock(&hso_dev->parent->mutex);
3205 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
72dc1c09
GKH		 3206 }
3207 }
3208
3209 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
8e95a202
JP		 3210 if (network_table[i] &&
3211 (network_table[i]->interface == interface)) {
72dc1c09
GKH		 3212 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3213 /* hso_stop_net_device doesn't stop the net queue since
3214 * traffic needs to start it again when suspended */
3215 netif_stop_queue(dev2net(network_table[i])->net);
3216 hso_stop_net_device(network_table[i]);
3217 cancel_work_sync(&network_table[i]->async_put_intf);
3218 cancel_work_sync(&network_table[i]->async_get_intf);
19d337df 3219 if (rfk) {
72dc1c09 3220 rfkill_unregister(rfk);
19d337df
JB		 3221 rfkill_destroy(rfk);
3222 }
72dc1c09
GKH		 3223 hso_free_net_device(network_table[i]);
3224 }
3225 }
3226}
3227
3228/* Helper functions */
3229
3230/* Get the endpoint ! */
3231static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3232 int type, int dir)
3233{
3234 int i;
3235 struct usb_host_interface *iface = intf->cur_altsetting;
3236 struct usb_endpoint_descriptor *endp;
3237
3238 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3239 endp = &iface->endpoint[i].desc;
3240 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
f201a8a4 3241 (usb_endpoint_type(endp) == type))
72dc1c09
GKH		 3242 return endp;
3243 }
3244
3245 return NULL;
3246}
3247
3248/* Get the byte that describes which ports are enabled */
3249static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3250{
3251 int i;
3252 struct usb_host_interface *iface = intf->cur_altsetting;
3253
3254 if (iface->extralen == 3) {
3255 *ports = iface->extra[2];
3256 return 0;
3257 }
3258
3259 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3260 if (iface->endpoint[i].extralen == 3) {
3261 *ports = iface->endpoint[i].extra[2];
3262 return 0;
3263 }
3264 }
3265
3266 return -1;
3267}
3268
3269/* interrupt urb needs to be submitted, used for serial read of muxed port */
3270static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3271 struct usb_device *usb, gfp_t gfp)
3272{
3273 int result;
3274
3275 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3276 usb_rcvintpipe(usb,
3277 shared_int->intr_endp->bEndpointAddress & 0x7F),
3278 shared_int->shared_intr_buf,
d9ced80d 3279 1,
72dc1c09
GKH		 3280 intr_callback, shared_int,
3281 shared_int->intr_endp->bInterval);
3282
3283 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3284 if (result)
8a5c9c49 3285 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
72dc1c09
GKH		 3286 result);
3287
3288 return result;
3289}
3290
3291/* operations setup of the serial interface */
6c59f569 3292static const struct tty_operations hso_serial_ops = {
72dc1c09
GKH		 3293 .open = hso_serial_open,
3294 .close = hso_serial_close,
3295 .write = hso_serial_write,
3296 .write_room = hso_serial_write_room,
542f5482 3297 .ioctl = hso_serial_ioctl,
72dc1c09
GKH		 3298 .set_termios = hso_serial_set_termios,
3299 .chars_in_buffer = hso_serial_chars_in_buffer,
3300 .tiocmget = hso_serial_tiocmget,
3301 .tiocmset = hso_serial_tiocmset,
8ef5ba63 3302 .unthrottle = hso_unthrottle
72dc1c09
GKH		 3303};
3304
3305static struct usb_driver hso_driver = {
3306 .name = driver_name,
3307 .probe = hso_probe,
3308 .disconnect = hso_disconnect,
3309 .id_table = hso_ids,
3310 .suspend = hso_suspend,
3311 .resume = hso_resume,
9c8f92ae 3312 .reset_resume = hso_resume,
72dc1c09
GKH		 3313 .supports_autosuspend = 1,
3314};
3315
3316static int __init hso_init(void)
3317{
3318 int i;
3319 int result;
3320
3321 /* put it in the log */
3322 printk(KERN_INFO "hso: %s\n", version);
3323
3324 /* Initialise the serial table semaphore and table */
3325 spin_lock_init(&serial_table_lock);
3326 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3327 serial_table[i] = NULL;
3328
3329 /* allocate our driver using the proper amount of supported minors */
3330 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3331 if (!tty_drv)
3332 return -ENOMEM;
3333
3334 /* fill in all needed values */
3335 tty_drv->magic = TTY_DRIVER_MAGIC;
3336 tty_drv->owner = THIS_MODULE;
3337 tty_drv->driver_name = driver_name;
3338 tty_drv->name = tty_filename;
3339
3340 /* if major number is provided as parameter, use that one */
3341 if (tty_major)
3342 tty_drv->major = tty_major;
3343
3344 tty_drv->minor_start = 0;
3345 tty_drv->num = HSO_SERIAL_TTY_MINORS;
3346 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3347 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3348 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3349 tty_drv->init_termios = tty_std_termios;
ac9720c3 3350 hso_init_termios(&tty_drv->init_termios);
72dc1c09
GKH		 3351 tty_set_operations(tty_drv, &hso_serial_ops);
3352
3353 /* register the tty driver */
3354 result = tty_register_driver(tty_drv);
3355 if (result) {
3356 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3357 __func__, result);
3358 return result;
3359 }
3360
3361 /* register this module as an usb driver */
3362 result = usb_register(&hso_driver);
3363 if (result) {
3364 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3365 result);
3366 /* cleanup serial interface */
3367 tty_unregister_driver(tty_drv);
3368 return result;
3369 }
3370
3371 /* done */
3372 return 0;
3373}
3374
3375static void __exit hso_exit(void)
3376{
3377 printk(KERN_INFO "hso: unloaded\n");
3378
3379 tty_unregister_driver(tty_drv);
3380 /* deregister the usb driver */
3381 usb_deregister(&hso_driver);
3382}
3383
3384/* Module definitions */
3385module_init(hso_init);
3386module_exit(hso_exit);
3387
3388MODULE_AUTHOR(MOD_AUTHOR);
3389MODULE_DESCRIPTION(MOD_DESCRIPTION);
3390MODULE_LICENSE(MOD_LICENSE);
3391MODULE_INFO(Version, DRIVER_VERSION);
3392
3393/* change the debug level (eg: insmod hso.ko debug=0x04) */
3394MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3395module_param(debug, int, S_IRUGO | S_IWUSR);
3396
3397/* set the major tty number (eg: insmod hso.ko tty_major=245) */
3398MODULE_PARM_DESC(tty_major, "Set the major tty number");
3399module_param(tty_major, int, S_IRUGO | S_IWUSR);
3400
3401/* disable network interface (eg: insmod hso.ko disable_net=1) */
3402MODULE_PARM_DESC(disable_net, "Disable the network interface");
3403module_param(disable_net, int, S_IRUGO | S_IWUSR);
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