projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
TTY: msm_smd_tty, clean up activate/shutdown
[deliverable/linux.git] / drivers / net / usb / hso.c
CommitLineData
72dc1c09
GKH		 1/******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
11cd29b0
DJB		 6 * Filip Aben <f.aben@option.com>
7 * Denis Joseph Barrow <d.barow@option.com>
3b7d2b31 8 * Jan Dumon <j.dumon@option.com>
72dc1c09
GKH		 9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
10 * <ajb@spheresystems.co.uk>
11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
12 * Copyright (C) 2008 Novell, Inc.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
26 * USA
27 *
28 *
29 *****************************************************************************/
30
31/******************************************************************************
32 *
33 * Description of the device:
34 *
35 * Interface 0: Contains the IP network interface on the bulk end points.
36 * The multiplexed serial ports are using the interrupt and
37 * control endpoints.
38 * Interrupt contains a bitmap telling which multiplexed
39 * serialport needs servicing.
40 *
41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
42 * port is opened, as this have a huge impact on the network port
43 * throughput.
44 *
542f5482
DJB		 45 * Interface 2: Standard modem interface - circuit switched interface, this
46 * can be used to make a standard ppp connection however it
47 * should not be used in conjunction with the IP network interface
48 * enabled for USB performance reasons i.e. if using this set
49 * ideally disable_net=1.
72dc1c09
GKH		 50 *
51 *****************************************************************************/
52
53#include <linux/sched.h>
54#include <linux/slab.h>
55#include <linux/init.h>
56#include <linux/delay.h>
57#include <linux/netdevice.h>
58#include <linux/module.h>
59#include <linux/ethtool.h>
60#include <linux/usb.h>
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
72dc1c09
GKH		 76#define MOD_AUTHOR "Option Wireless"
77#define MOD_DESCRIPTION "USB High Speed Option driver"
78#define MOD_LICENSE "GPL"
79
80#define HSO_MAX_NET_DEVICES 10
81#define HSO__MAX_MTU 2048
82#define DEFAULT_MTU 1500
83#define DEFAULT_MRU 1500
84
85#define CTRL_URB_RX_SIZE 1024
86#define CTRL_URB_TX_SIZE 64
87
88#define BULK_URB_RX_SIZE 4096
89#define BULK_URB_TX_SIZE 8192
90
91#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
92#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
93#define MUX_BULK_RX_BUF_COUNT 4
94#define USB_TYPE_OPTION_VENDOR 0x20
95
96/* These definitions are used with the struct hso_net flags element */
97/* - use *_bit operations on it. (bit indices not values.) */
98#define HSO_NET_RUNNING 0
99
100#define HSO_NET_TX_TIMEOUT (HZ*10)
101
72dc1c09
GKH		 102#define HSO_SERIAL_MAGIC 0x48534f31
103
104/* Number of ttys to handle */
105#define HSO_SERIAL_TTY_MINORS 256
106
107#define MAX_RX_URBS 2
108
72dc1c09
GKH		 109/*****************************************************************************/
110/* Debugging functions */
111/*****************************************************************************/
112#define D__(lvl_, fmt, arg...) \
113 do { \
114 printk(lvl_ "[%d:%s]: " fmt "\n", \
115 __LINE__, __func__, ## arg); \
116 } while (0)
117
118#define D_(lvl, args...) \
119 do { \
120 if (lvl & debug) \
121 D__(KERN_INFO, args); \
122 } while (0)
123
124#define D1(args...) D_(0x01, ##args)
125#define D2(args...) D_(0x02, ##args)
126#define D3(args...) D_(0x04, ##args)
127#define D4(args...) D_(0x08, ##args)
128#define D5(args...) D_(0x10, ##args)
129
130/*****************************************************************************/
131/* Enumerators */
132/*****************************************************************************/
133enum pkt_parse_state {
134 WAIT_IP,
135 WAIT_DATA,
136 WAIT_SYNC
137};
138
139/*****************************************************************************/
140/* Structs */
141/*****************************************************************************/
142
143struct hso_shared_int {
144 struct usb_endpoint_descriptor *intr_endp;
145 void *shared_intr_buf;
146 struct urb *shared_intr_urb;
147 struct usb_device *usb;
148 int use_count;
149 int ref_count;
150 struct mutex shared_int_lock;
151};
152
153struct hso_net {
154 struct hso_device *parent;
155 struct net_device *net;
156 struct rfkill *rfkill;
157
158 struct usb_endpoint_descriptor *in_endp;
159 struct usb_endpoint_descriptor *out_endp;
160
161 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
162 struct urb *mux_bulk_tx_urb;
163 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
164 void *mux_bulk_tx_buf;
165
166 struct sk_buff *skb_rx_buf;
167 struct sk_buff *skb_tx_buf;
168
169 enum pkt_parse_state rx_parse_state;
170 spinlock_t net_lock;
171
172 unsigned short rx_buf_size;
173 unsigned short rx_buf_missing;
174 struct iphdr rx_ip_hdr;
175
176 unsigned long flags;
177};
178
8ef5ba63
DJB		 179enum rx_ctrl_state{
180 RX_IDLE,
181 RX_SENT,
182 RX_PENDING
183};
184
542f5482
DJB		 185#define BM_REQUEST_TYPE (0xa1)
186#define B_NOTIFICATION (0x20)
187#define W_VALUE (0x0)
188#define W_INDEX (0x2)
189#define W_LENGTH (0x2)
190
191#define B_OVERRUN (0x1<<6)
192#define B_PARITY (0x1<<5)
193#define B_FRAMING (0x1<<4)
194#define B_RING_SIGNAL (0x1<<3)
195#define B_BREAK (0x1<<2)
196#define B_TX_CARRIER (0x1<<1)
197#define B_RX_CARRIER (0x1<<0)
198
199struct hso_serial_state_notification {
200 u8 bmRequestType;
201 u8 bNotification;
202 u16 wValue;
203 u16 wIndex;
204 u16 wLength;
205 u16 UART_state_bitmap;
ba2d3587 206} __packed;
542f5482
DJB		 207
208struct hso_tiocmget {
209 struct mutex mutex;
210 wait_queue_head_t waitq;
211 int intr_completed;
212 struct usb_endpoint_descriptor *endp;
213 struct urb *urb;
214 struct hso_serial_state_notification serial_state_notification;
215 u16 prev_UART_state_bitmap;
216 struct uart_icount icount;
217};
218
219
72dc1c09
GKH		 220struct hso_serial {
221 struct hso_device *parent;
222 int magic;
223 u8 minor;
224
225 struct hso_shared_int *shared_int;
226
227 /* rx/tx urb could be either a bulk urb or a control urb depending
228 on which serial port it is used on. */
229 struct urb *rx_urb[MAX_RX_URBS];
230 u8 num_rx_urbs;
231 u8 *rx_data[MAX_RX_URBS];
232 u16 rx_data_length; /* should contain allocated length */
233
234 struct urb *tx_urb;
235 u8 *tx_data;
236 u8 *tx_buffer;
237 u16 tx_data_length; /* should contain allocated length */
238 u16 tx_data_count;
239 u16 tx_buffer_count;
240 struct usb_ctrlrequest ctrl_req_tx;
241 struct usb_ctrlrequest ctrl_req_rx;
242
243 struct usb_endpoint_descriptor *in_endp;
244 struct usb_endpoint_descriptor *out_endp;
245
8ef5ba63 246 enum rx_ctrl_state rx_state;
72dc1c09
GKH		 247 u8 rts_state;
248 u8 dtr_state;
249 unsigned tx_urb_used:1;
250
5ce76e77 251 struct tty_port port;
72dc1c09 252 /* from usb_serial_port */
72dc1c09
GKH		 253 spinlock_t serial_lock;
254
255 int (*write_data) (struct hso_serial *serial);
542f5482 256 struct hso_tiocmget *tiocmget;
8ef5ba63
DJB		 257 /* Hacks required to get flow control
258 * working on the serial receive buffers
259 * so as not to drop characters on the floor.
260 */
261 int curr_rx_urb_idx;
262 u16 curr_rx_urb_offset;
263 u8 rx_urb_filled[MAX_RX_URBS];
264 struct tasklet_struct unthrottle_tasklet;
265 struct work_struct retry_unthrottle_workqueue;
72dc1c09
GKH		 266};
267
268struct hso_device {
269 union {
270 struct hso_serial *dev_serial;
271 struct hso_net *dev_net;
272 } port_data;
273
274 u32 port_spec;
275
276 u8 is_active;
277 u8 usb_gone;
278 struct work_struct async_get_intf;
279 struct work_struct async_put_intf;
68a351c5 280 struct work_struct reset_device;
72dc1c09
GKH		 281
282 struct usb_device *usb;
283 struct usb_interface *interface;
284
285 struct device *dev;
286 struct kref ref;
ab153d84 287 struct mutex mutex;
72dc1c09
GKH		 288};
289
290/* Type of interface */
291#define HSO_INTF_MASK 0xFF00
292#define HSO_INTF_MUX 0x0100
293#define HSO_INTF_BULK 0x0200
294
295/* Type of port */
296#define HSO_PORT_MASK 0xFF
297#define HSO_PORT_NO_PORT 0x0
298#define HSO_PORT_CONTROL 0x1
299#define HSO_PORT_APP 0x2
300#define HSO_PORT_GPS 0x3
301#define HSO_PORT_PCSC 0x4
302#define HSO_PORT_APP2 0x5
303#define HSO_PORT_GPS_CONTROL 0x6
304#define HSO_PORT_MSD 0x7
305#define HSO_PORT_VOICE 0x8
306#define HSO_PORT_DIAG2 0x9
307#define HSO_PORT_DIAG 0x10
308#define HSO_PORT_MODEM 0x11
309#define HSO_PORT_NETWORK 0x12
310
311/* Additional device info */
312#define HSO_INFO_MASK 0xFF000000
313#define HSO_INFO_CRC_BUG 0x01000000
314
315/*****************************************************************************/
316/* Prototypes */
317/*****************************************************************************/
318/* Serial driver functions */
20b9d177 319static int hso_serial_tiocmset(struct tty_struct *tty,
72dc1c09
GKH		 320 unsigned int set, unsigned int clear);
321static void ctrl_callback(struct urb *urb);
8ef5ba63 322static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
72dc1c09
GKH		 323static void hso_kick_transmit(struct hso_serial *serial);
324/* Helper functions */
325static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
326 struct usb_device *usb, gfp_t gfp);
68a351c5
JD		 327static void handle_usb_error(int status, const char *function,
328 struct hso_device *hso_dev);
72dc1c09
GKH		 329static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
330 int type, int dir);
331static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
332static void hso_free_interface(struct usb_interface *intf);
333static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
334static int hso_stop_serial_device(struct hso_device *hso_dev);
335static int hso_start_net_device(struct hso_device *hso_dev);
336static void hso_free_shared_int(struct hso_shared_int *shared_int);
337static int hso_stop_net_device(struct hso_device *hso_dev);
338static void hso_serial_ref_free(struct kref *ref);
8ef5ba63
DJB		 339static void hso_std_serial_read_bulk_callback(struct urb *urb);
340static int hso_mux_serial_read(struct hso_serial *serial);
72dc1c09
GKH		 341static void async_get_intf(struct work_struct *data);
342static void async_put_intf(struct work_struct *data);
343static int hso_put_activity(struct hso_device *hso_dev);
344static int hso_get_activity(struct hso_device *hso_dev);
542f5482 345static void tiocmget_intr_callback(struct urb *urb);
68a351c5 346static void reset_device(struct work_struct *data);
72dc1c09
GKH		 347/*****************************************************************************/
348/* Helping functions */
349/*****************************************************************************/
350
351/* #define DEBUG */
352
0235f641
GKH		 353static inline struct hso_net *dev2net(struct hso_device *hso_dev)
354{
355 return hso_dev->port_data.dev_net;
356}
357
358static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
359{
360 return hso_dev->port_data.dev_serial;
361}
72dc1c09
GKH		 362
363/* Debugging functions */
364#ifdef DEBUG
365static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
366 unsigned int len)
367{
0235f641 368 static char name[255];
72dc1c09 369
0235f641
GKH		 370 sprintf(name, "hso[%d:%s]", line_count, func_name);
371 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
72dc1c09
GKH		 372}
373
374#define DUMP(buf_, len_) \
9ce673d5 375 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
72dc1c09
GKH		 376
377#define DUMP1(buf_, len_) \
378 do { \
379 if (0x01 & debug) \
380 DUMP(buf_, len_); \
381 } while (0)
382#else
383#define DUMP(buf_, len_)
384#define DUMP1(buf_, len_)
385#endif
386
387/* module parameters */
388static int debug;
389static int tty_major;
390static int disable_net;
391
392/* driver info */
393static const char driver_name[] = "hso";
394static const char tty_filename[] = "ttyHS";
242647bc 395static const char *version = __FILE__ ": " MOD_AUTHOR;
72dc1c09
GKH		 396/* the usb driver itself (registered in hso_init) */
397static struct usb_driver hso_driver;
398/* serial structures */
399static struct tty_driver *tty_drv;
400static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
401static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
402static spinlock_t serial_table_lock;
72dc1c09
GKH		 403
404static const s32 default_port_spec[] = {
405 HSO_INTF_MUX | HSO_PORT_NETWORK,
406 HSO_INTF_BULK | HSO_PORT_DIAG,
407 HSO_INTF_BULK | HSO_PORT_MODEM,
408 0
409};
410
411static const s32 icon321_port_spec[] = {
412 HSO_INTF_MUX | HSO_PORT_NETWORK,
413 HSO_INTF_BULK | HSO_PORT_DIAG2,
414 HSO_INTF_BULK | HSO_PORT_MODEM,
415 HSO_INTF_BULK | HSO_PORT_DIAG,
416 0
417};
418
419#define default_port_device(vendor, product) \
420 USB_DEVICE(vendor, product), \
421 .driver_info = (kernel_ulong_t)default_port_spec
422
423#define icon321_port_device(vendor, product) \
424 USB_DEVICE(vendor, product), \
425 .driver_info = (kernel_ulong_t)icon321_port_spec
426
427/* list of devices we support */
428static const struct usb_device_id hso_ids[] = {
429 {default_port_device(0x0af0, 0x6711)},
430 {default_port_device(0x0af0, 0x6731)},
431 {default_port_device(0x0af0, 0x6751)},
432 {default_port_device(0x0af0, 0x6771)},
433 {default_port_device(0x0af0, 0x6791)},
434 {default_port_device(0x0af0, 0x6811)},
435 {default_port_device(0x0af0, 0x6911)},
436 {default_port_device(0x0af0, 0x6951)},
437 {default_port_device(0x0af0, 0x6971)},
438 {default_port_device(0x0af0, 0x7011)},
439 {default_port_device(0x0af0, 0x7031)},
440 {default_port_device(0x0af0, 0x7051)},
441 {default_port_device(0x0af0, 0x7071)},
442 {default_port_device(0x0af0, 0x7111)},
443 {default_port_device(0x0af0, 0x7211)},
444 {default_port_device(0x0af0, 0x7251)},
445 {default_port_device(0x0af0, 0x7271)},
446 {default_port_device(0x0af0, 0x7311)},
447 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
448 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
449 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
95eacee8 450 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
72dc1c09
GKH		 451 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
452 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
67dd8246 453 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
72dc1c09
GKH		 454 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
455 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
456 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
bab04c3a 457 {USB_DEVICE(0x0af0, 0x7701)},
ec157937 458 {USB_DEVICE(0x0af0, 0x7706)},
bab04c3a
DJB		 459 {USB_DEVICE(0x0af0, 0x7801)},
460 {USB_DEVICE(0x0af0, 0x7901)},
ec157937
JD		 461 {USB_DEVICE(0x0af0, 0x7A01)},
462 {USB_DEVICE(0x0af0, 0x7A05)},
9961d842
JD		 463 {USB_DEVICE(0x0af0, 0x8200)},
464 {USB_DEVICE(0x0af0, 0x8201)},
ec157937
JD		 465 {USB_DEVICE(0x0af0, 0x8300)},
466 {USB_DEVICE(0x0af0, 0x8302)},
467 {USB_DEVICE(0x0af0, 0x8304)},
468 {USB_DEVICE(0x0af0, 0x8400)},
dd7496f2
FA		 469 {USB_DEVICE(0x0af0, 0x8600)},
470 {USB_DEVICE(0x0af0, 0x8800)},
471 {USB_DEVICE(0x0af0, 0x8900)},
5c7bf2f4 472 {USB_DEVICE(0x0af0, 0x9000)},
9961d842 473 {USB_DEVICE(0x0af0, 0xd035)},
67dd8246 474 {USB_DEVICE(0x0af0, 0xd055)},
9961d842
JD		 475 {USB_DEVICE(0x0af0, 0xd155)},
476 {USB_DEVICE(0x0af0, 0xd255)},
477 {USB_DEVICE(0x0af0, 0xd057)},
478 {USB_DEVICE(0x0af0, 0xd157)},
479 {USB_DEVICE(0x0af0, 0xd257)},
480 {USB_DEVICE(0x0af0, 0xd357)},
ec157937
JD		 481 {USB_DEVICE(0x0af0, 0xd058)},
482 {USB_DEVICE(0x0af0, 0xc100)},
72dc1c09
GKH		 483 {}
484};
485MODULE_DEVICE_TABLE(usb, hso_ids);
486
487/* Sysfs attribute */
488static ssize_t hso_sysfs_show_porttype(struct device *dev,
489 struct device_attribute *attr,
490 char *buf)
491{
1aec5bdf 492 struct hso_device *hso_dev = dev_get_drvdata(dev);
72dc1c09
GKH		 493 char *port_name;
494
495 if (!hso_dev)
496 return 0;
497
498 switch (hso_dev->port_spec & HSO_PORT_MASK) {
499 case HSO_PORT_CONTROL:
500 port_name = "Control";
501 break;
502 case HSO_PORT_APP:
503 port_name = "Application";
504 break;
505 case HSO_PORT_APP2:
506 port_name = "Application2";
507 break;
508 case HSO_PORT_GPS:
509 port_name = "GPS";
510 break;
511 case HSO_PORT_GPS_CONTROL:
512 port_name = "GPS Control";
513 break;
514 case HSO_PORT_PCSC:
515 port_name = "PCSC";
516 break;
517 case HSO_PORT_DIAG:
518 port_name = "Diagnostic";
519 break;
520 case HSO_PORT_DIAG2:
521 port_name = "Diagnostic2";
522 break;
523 case HSO_PORT_MODEM:
524 port_name = "Modem";
525 break;
526 case HSO_PORT_NETWORK:
527 port_name = "Network";
528 break;
529 default:
530 port_name = "Unknown";
531 break;
532 }
533
534 return sprintf(buf, "%s\n", port_name);
535}
536static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
537
8ef5ba63
DJB		 538static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
539{
540 int idx;
541
542 for (idx = 0; idx < serial->num_rx_urbs; idx++)
543 if (serial->rx_urb[idx] == urb)
544 return idx;
545 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
546 return -1;
547}
548
72dc1c09
GKH		 549/* converts mux value to a port spec value */
550static u32 hso_mux_to_port(int mux)
551{
552 u32 result;
553
554 switch (mux) {
555 case 0x1:
556 result = HSO_PORT_CONTROL;
557 break;
558 case 0x2:
559 result = HSO_PORT_APP;
560 break;
561 case 0x4:
562 result = HSO_PORT_PCSC;
563 break;
564 case 0x8:
565 result = HSO_PORT_GPS;
566 break;
567 case 0x10:
568 result = HSO_PORT_APP2;
569 break;
570 default:
571 result = HSO_PORT_NO_PORT;
572 }
573 return result;
574}
575
576/* converts port spec value to a mux value */
577static u32 hso_port_to_mux(int port)
578{
579 u32 result;
580
581 switch (port & HSO_PORT_MASK) {
582 case HSO_PORT_CONTROL:
583 result = 0x0;
584 break;
585 case HSO_PORT_APP:
586 result = 0x1;
587 break;
588 case HSO_PORT_PCSC:
589 result = 0x2;
590 break;
591 case HSO_PORT_GPS:
592 result = 0x3;
593 break;
594 case HSO_PORT_APP2:
595 result = 0x4;
596 break;
597 default:
598 result = 0x0;
599 }
600 return result;
601}
602
603static struct hso_serial *get_serial_by_shared_int_and_type(
604 struct hso_shared_int *shared_int,
605 int mux)
606{
607 int i, port;
608
609 port = hso_mux_to_port(mux);
610
611 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
8e95a202
JP		 612 if (serial_table[i] &&
613 (dev2ser(serial_table[i])->shared_int == shared_int) &&
614 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
72dc1c09
GKH		 615 return dev2ser(serial_table[i]);
616 }
617 }
618
619 return NULL;
620}
621
622static struct hso_serial *get_serial_by_index(unsigned index)
623{
0235f641 624 struct hso_serial *serial = NULL;
72dc1c09
GKH		 625 unsigned long flags;
626
72dc1c09 627 spin_lock_irqsave(&serial_table_lock, flags);
0235f641
GKH		 628 if (serial_table[index])
629 serial = dev2ser(serial_table[index]);
72dc1c09
GKH		 630 spin_unlock_irqrestore(&serial_table_lock, flags);
631
632 return serial;
633}
634
635static int get_free_serial_index(void)
636{
637 int index;
638 unsigned long flags;
639
640 spin_lock_irqsave(&serial_table_lock, flags);
641 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
642 if (serial_table[index] == NULL) {
643 spin_unlock_irqrestore(&serial_table_lock, flags);
644 return index;
645 }
646 }
647 spin_unlock_irqrestore(&serial_table_lock, flags);
648
649 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
650 return -1;
651}
652
653static void set_serial_by_index(unsigned index, struct hso_serial *serial)
654{
655 unsigned long flags;
0235f641 656
72dc1c09
GKH		 657 spin_lock_irqsave(&serial_table_lock, flags);
658 if (serial)
659 serial_table[index] = serial->parent;
660 else
661 serial_table[index] = NULL;
662 spin_unlock_irqrestore(&serial_table_lock, flags);
663}
664
68a351c5
JD		 665static void handle_usb_error(int status, const char *function,
666 struct hso_device *hso_dev)
72dc1c09
GKH		 667{
668 char *explanation;
669
670 switch (status) {
671 case -ENODEV:
672 explanation = "no device";
673 break;
674 case -ENOENT:
675 explanation = "endpoint not enabled";
676 break;
677 case -EPIPE:
678 explanation = "endpoint stalled";
679 break;
680 case -ENOSPC:
681 explanation = "not enough bandwidth";
682 break;
683 case -ESHUTDOWN:
684 explanation = "device disabled";
685 break;
686 case -EHOSTUNREACH:
687 explanation = "device suspended";
688 break;
689 case -EINVAL:
690 case -EAGAIN:
691 case -EFBIG:
692 case -EMSGSIZE:
693 explanation = "internal error";
694 break;
68a351c5
JD		 695 case -EILSEQ:
696 case -EPROTO:
697 case -ETIME:
698 case -ETIMEDOUT:
699 explanation = "protocol error";
700 if (hso_dev)
701 schedule_work(&hso_dev->reset_device);
702 break;
72dc1c09
GKH		 703 default:
704 explanation = "unknown status";
705 break;
706 }
68a351c5
JD		 707
708 /* log a meaningful explanation of an USB status */
72dc1c09
GKH		 709 D1("%s: received USB status - %s (%d)", function, explanation, status);
710}
711
712/* Network interface functions */
713
714/* called when net interface is brought up by ifconfig */
715static int hso_net_open(struct net_device *net)
716{
717 struct hso_net *odev = netdev_priv(net);
718 unsigned long flags = 0;
719
720 if (!odev) {
721 dev_err(&net->dev, "No net device !\n");
722 return -ENODEV;
723 }
724
725 odev->skb_tx_buf = NULL;
726
727 /* setup environment */
728 spin_lock_irqsave(&odev->net_lock, flags);
729 odev->rx_parse_state = WAIT_IP;
730 odev->rx_buf_size = 0;
731 odev->rx_buf_missing = sizeof(struct iphdr);
732 spin_unlock_irqrestore(&odev->net_lock, flags);
733
72dc1c09
GKH		 734 /* We are up and running. */
735 set_bit(HSO_NET_RUNNING, &odev->flags);
889bd9b6 736 hso_start_net_device(odev->parent);
72dc1c09
GKH		 737
738 /* Tell the kernel we are ready to start receiving from it */
739 netif_start_queue(net);
740
741 return 0;
742}
743
744/* called when interface is brought down by ifconfig */
745static int hso_net_close(struct net_device *net)
746{
747 struct hso_net *odev = netdev_priv(net);
748
749 /* we don't need the queue anymore */
750 netif_stop_queue(net);
751 /* no longer running */
752 clear_bit(HSO_NET_RUNNING, &odev->flags);
753
754 hso_stop_net_device(odev->parent);
755
756 /* done */
757 return 0;
758}
759
760/* USB tells is xmit done, we should start the netqueue again */
761static void write_bulk_callback(struct urb *urb)
762{
763 struct hso_net *odev = urb->context;
764 int status = urb->status;
765
766 /* Sanity check */
767 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
768 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
769 return;
770 }
771
772 /* Do we still have a valid kernel network device? */
773 if (!netif_device_present(odev->net)) {
774 dev_err(&urb->dev->dev, "%s: net device not present\n",
775 __func__);
776 return;
777 }
778
779 /* log status, but don't act on it, we don't need to resubmit anything
780 * anyhow */
781 if (status)
68a351c5 782 handle_usb_error(status, __func__, odev->parent);
72dc1c09
GKH		 783
784 hso_put_activity(odev->parent);
785
786 /* Tell the network interface we are ready for another frame */
787 netif_wake_queue(odev->net);
788}
789
790/* called by kernel when we need to transmit a packet */
25a79c41
SH		 791static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
792 struct net_device *net)
72dc1c09
GKH		 793{
794 struct hso_net *odev = netdev_priv(net);
795 int result;
796
797 /* Tell the kernel, "No more frames 'til we are done with this one." */
798 netif_stop_queue(net);
799 if (hso_get_activity(odev->parent) == -EAGAIN) {
800 odev->skb_tx_buf = skb;
6ed10654 801 return NETDEV_TX_OK;
72dc1c09
GKH		 802 }
803
804 /* log if asked */
805 DUMP1(skb->data, skb->len);
806 /* Copy it from kernel memory to OUR memory */
807 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
808 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
809
810 /* Fill in the URB for shipping it out. */
811 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
812 odev->parent->usb,
813 usb_sndbulkpipe(odev->parent->usb,
814 odev->out_endp->
815 bEndpointAddress & 0x7F),
816 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
817 odev);
818
819 /* Deal with the Zero Length packet problem, I hope */
820 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
821
822 /* Send the URB on its merry way. */
823 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
824 if (result) {
825 dev_warn(&odev->parent->interface->dev,
8a5c9c49 826 "failed mux_bulk_tx_urb %d\n", result);
72dc1c09
GKH		 827 net->stats.tx_errors++;
828 netif_start_queue(net);
829 } else {
830 net->stats.tx_packets++;
831 net->stats.tx_bytes += skb->len;
72dc1c09
GKH		 832 }
833 dev_kfree_skb(skb);
834 /* we're done */
5b2c4b97 835 return NETDEV_TX_OK;
72dc1c09
GKH		 836}
837
0fc0b732 838static const struct ethtool_ops ops = {
72dc1c09
GKH		 839 .get_link = ethtool_op_get_link
840};
841
842/* called when a packet did not ack after watchdogtimeout */
843static void hso_net_tx_timeout(struct net_device *net)
844{
845 struct hso_net *odev = netdev_priv(net);
846
847 if (!odev)
848 return;
849
850 /* Tell syslog we are hosed. */
851 dev_warn(&net->dev, "Tx timed out.\n");
852
853 /* Tear the waiting frame off the list */
8e95a202
JP		 854 if (odev->mux_bulk_tx_urb &&
855 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
72dc1c09
GKH		 856 usb_unlink_urb(odev->mux_bulk_tx_urb);
857
858 /* Update statistics */
859 net->stats.tx_errors++;
860}
861
862/* make a real packet from the received USB buffer */
863static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
864 unsigned int count, unsigned char is_eop)
865{
866 unsigned short temp_bytes;
867 unsigned short buffer_offset = 0;
868 unsigned short frame_len;
869 unsigned char *tmp_rx_buf;
870
871 /* log if needed */
872 D1("Rx %d bytes", count);
873 DUMP(ip_pkt, min(128, (int)count));
874
875 while (count) {
876 switch (odev->rx_parse_state) {
877 case WAIT_IP:
878 /* waiting for IP header. */
879 /* wanted bytes - size of ip header */
880 temp_bytes =
881 (count <
882 odev->rx_buf_missing) ? count : odev->
883 rx_buf_missing;
884
885 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
886 odev->rx_buf_size, ip_pkt + buffer_offset,
887 temp_bytes);
888
889 odev->rx_buf_size += temp_bytes;
890 buffer_offset += temp_bytes;
891 odev->rx_buf_missing -= temp_bytes;
892 count -= temp_bytes;
893
894 if (!odev->rx_buf_missing) {
895 /* header is complete allocate an sk_buffer and
896 * continue to WAIT_DATA */
897 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
898
899 if ((frame_len > DEFAULT_MRU) ||
900 (frame_len < sizeof(struct iphdr))) {
901 dev_err(&odev->net->dev,
902 "Invalid frame (%d) length\n",
903 frame_len);
904 odev->rx_parse_state = WAIT_SYNC;
905 continue;
906 }
907 /* Allocate an sk_buff */
d65a68a8
PZ		 908 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
909 frame_len);
72dc1c09
GKH		 910 if (!odev->skb_rx_buf) {
911 /* We got no receive buffer. */
912 D1("could not allocate memory");
913 odev->rx_parse_state = WAIT_SYNC;
914 return;
915 }
72dc1c09
GKH		 916
917 /* Copy what we got so far. make room for iphdr
918 * after tail. */
919 tmp_rx_buf =
920 skb_put(odev->skb_rx_buf,
921 sizeof(struct iphdr));
922 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
923 sizeof(struct iphdr));
924
925 /* ETH_HLEN */
926 odev->rx_buf_size = sizeof(struct iphdr);
927
928 /* Filip actually use .tot_len */
929 odev->rx_buf_missing =
930 frame_len - sizeof(struct iphdr);
931 odev->rx_parse_state = WAIT_DATA;
932 }
933 break;
934
935 case WAIT_DATA:
936 temp_bytes = (count < odev->rx_buf_missing)
937 ? count : odev->rx_buf_missing;
938
939 /* Copy the rest of the bytes that are left in the
940 * buffer into the waiting sk_buf. */
941 /* Make room for temp_bytes after tail. */
942 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
943 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
944
945 odev->rx_buf_missing -= temp_bytes;
946 count -= temp_bytes;
947 buffer_offset += temp_bytes;
948 odev->rx_buf_size += temp_bytes;
949 if (!odev->rx_buf_missing) {
950 /* Packet is complete. Inject into stack. */
951 /* We have IP packet here */
09640e63 952 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
72dc1c09
GKH		 953 skb_reset_mac_header(odev->skb_rx_buf);
954
955 /* Ship it off to the kernel */
956 netif_rx(odev->skb_rx_buf);
957 /* No longer our buffer. */
958 odev->skb_rx_buf = NULL;
959
960 /* update out statistics */
961 odev->net->stats.rx_packets++;
962
963 odev->net->stats.rx_bytes += odev->rx_buf_size;
964
965 odev->rx_buf_size = 0;
966 odev->rx_buf_missing = sizeof(struct iphdr);
967 odev->rx_parse_state = WAIT_IP;
968 }
969 break;
970
971 case WAIT_SYNC:
972 D1(" W_S");
973 count = 0;
974 break;
975 default:
976 D1(" ");
977 count--;
978 break;
979 }
980 }
981
982 /* Recovery mechanism for WAIT_SYNC state. */
983 if (is_eop) {
984 if (odev->rx_parse_state == WAIT_SYNC) {
985 odev->rx_parse_state = WAIT_IP;
986 odev->rx_buf_size = 0;
987 odev->rx_buf_missing = sizeof(struct iphdr);
988 }
989 }
990}
991
5591c75d
JP		 992static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
993{
994 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
995 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
996
997 if (((rest == 5) || (rest == 6)) &&
998 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
999 crc_check, 4)) {
1000 urb->actual_length -= 4;
1001 }
1002}
1003
72dc1c09
GKH		 1004/* Moving data from usb to kernel (in interrupt state) */
1005static void read_bulk_callback(struct urb *urb)
1006{
1007 struct hso_net *odev = urb->context;
1008 struct net_device *net;
1009 int result;
1010 int status = urb->status;
1011
1012 /* is al ok? (Filip: Who's Al ?) */
1013 if (status) {
68a351c5 1014 handle_usb_error(status, __func__, odev->parent);
72dc1c09
GKH		 1015 return;
1016 }
1017
1018 /* Sanity check */
1019 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1020 D1("BULK IN callback but driver is not active!");
1021 return;
1022 }
1023 usb_mark_last_busy(urb->dev);
1024
1025 net = odev->net;
1026
1027 if (!netif_device_present(net)) {
1028 /* Somebody killed our network interface... */
1029 return;
1030 }
1031
5591c75d
JP		 1032 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1033 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
72dc1c09
GKH		 1034
1035 /* do we even have a packet? */
1036 if (urb->actual_length) {
1037 /* Handle the IP stream, add header and push it onto network
1038 * stack if the packet is complete. */
1039 spin_lock(&odev->net_lock);
1040 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1041 (urb->transfer_buffer_length >
1042 urb->actual_length) ? 1 : 0);
1043 spin_unlock(&odev->net_lock);
1044 }
1045
1046 /* We are done with this URB, resubmit it. Prep the USB to wait for
1047 * another frame. Reuse same as received. */
1048 usb_fill_bulk_urb(urb,
1049 odev->parent->usb,
1050 usb_rcvbulkpipe(odev->parent->usb,
1051 odev->in_endp->
1052 bEndpointAddress & 0x7F),
1053 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1054 read_bulk_callback, odev);
1055
1056 /* Give this to the USB subsystem so it can tell us when more data
1057 * arrives. */
1058 result = usb_submit_urb(urb, GFP_ATOMIC);
1059 if (result)
1060 dev_warn(&odev->parent->interface->dev,
8a5c9c49 1061 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
72dc1c09
GKH		 1062 result);
1063}
1064
1065/* Serial driver functions */
1066
ac9720c3 1067static void hso_init_termios(struct ktermios *termios)
72dc1c09 1068{
72dc1c09
GKH		 1069 /*
1070 * The default requirements for this device are:
1071 */
72dc1c09
GKH		 1072 termios->c_iflag &=
1073 ~(IGNBRK /* disable ignore break */
1074 | BRKINT /* disable break causes interrupt */
1075 | PARMRK /* disable mark parity errors */
1076 | ISTRIP /* disable clear high bit of input characters */
1077 | INLCR /* disable translate NL to CR */
1078 | IGNCR /* disable ignore CR */
1079 | ICRNL /* disable translate CR to NL */
1080 | IXON); /* disable enable XON/XOFF flow control */
1081
1082 /* disable postprocess output characters */
1083 termios->c_oflag &= ~OPOST;
1084
1085 termios->c_lflag &=
1086 ~(ECHO /* disable echo input characters */
1087 | ECHONL /* disable echo new line */
1088 | ICANON /* disable erase, kill, werase, and rprnt
1089 special characters */
1090 | ISIG /* disable interrupt, quit, and suspend special
1091 characters */
1092 | IEXTEN); /* disable non-POSIX special characters */
1093
1094 termios->c_cflag &=
1095 ~(CSIZE /* no size */
1096 | PARENB /* disable parity bit */
1097 | CBAUD /* clear current baud rate */
1098 | CBAUDEX); /* clear current buad rate */
1099
1100 termios->c_cflag |= CS8; /* character size 8 bits */
1101
1102 /* baud rate 115200 */
ac9720c3
AC		 1103 tty_termios_encode_baud_rate(termios, 115200, 115200);
1104}
1105
1106static void _hso_serial_set_termios(struct tty_struct *tty,
1107 struct ktermios *old)
1108{
30409420 1109 struct hso_serial *serial = tty->driver_data;
ac9720c3
AC		 1110
1111 if (!serial) {
1112 printk(KERN_ERR "%s: no tty structures", __func__);
1113 return;
1114 }
1115
1116 D4("port %d", serial->minor);
72dc1c09
GKH		 1117
1118 /*
ac9720c3 1119 * Fix up unsupported bits
72dc1c09 1120 */
adc8d746 1121 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
ac9720c3 1122
adc8d746 1123 tty->termios.c_cflag &=
ac9720c3
AC		 1124 ~(CSIZE /* no size */
1125 | PARENB /* disable parity bit */
1126 | CBAUD /* clear current baud rate */
1127 | CBAUDEX); /* clear current buad rate */
1128
adc8d746 1129 tty->termios.c_cflag |= CS8; /* character size 8 bits */
ac9720c3
AC		 1130
1131 /* baud rate 115200 */
1132 tty_encode_baud_rate(tty, 115200, 115200);
72dc1c09
GKH		 1133}
1134
8ef5ba63
DJB		 1135static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1136{
1137 int result;
8ef5ba63
DJB		 1138 /* We are done with this URB, resubmit it. Prep the USB to wait for
1139 * another frame */
1140 usb_fill_bulk_urb(urb, serial->parent->usb,
1141 usb_rcvbulkpipe(serial->parent->usb,
1142 serial->in_endp->
1143 bEndpointAddress & 0x7F),
1144 urb->transfer_buffer, serial->rx_data_length,
1145 hso_std_serial_read_bulk_callback, serial);
1146 /* Give this to the USB subsystem so it can tell us when more data
1147 * arrives. */
1148 result = usb_submit_urb(urb, GFP_ATOMIC);
1149 if (result) {
1150 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1151 __func__, result);
1152 }
1153}
1154
1155
1156
1157
1158static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1159{
1160 int count;
1161 struct urb *curr_urb;
1162
1163 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1164 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1165 count = put_rxbuf_data(curr_urb, serial);
1166 if (count == -1)
1167 return;
1168 if (count == 0) {
1169 serial->curr_rx_urb_idx++;
1170 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1171 serial->curr_rx_urb_idx = 0;
1172 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1173 }
1174 }
1175}
1176
1177static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1178{
1179 int count = 0;
1180 struct urb *urb;
1181
1182 urb = serial->rx_urb[0];
5ce76e77 1183 if (serial->port.count > 0) {
8ef5ba63
DJB		 1184 count = put_rxbuf_data(urb, serial);
1185 if (count == -1)
1186 return;
1187 }
1188 /* Re issue a read as long as we receive data. */
1189
1190 if (count == 0 && ((urb->actual_length != 0) ||
1191 (serial->rx_state == RX_PENDING))) {
1192 serial->rx_state = RX_SENT;
1193 hso_mux_serial_read(serial);
1194 } else
1195 serial->rx_state = RX_IDLE;
1196}
1197
1198
1199/* read callback for Diag and CS port */
1200static void hso_std_serial_read_bulk_callback(struct urb *urb)
1201{
1202 struct hso_serial *serial = urb->context;
1203 int status = urb->status;
1204
1205 /* sanity check */
1206 if (!serial) {
1207 D1("serial == NULL");
1208 return;
1209 } else if (status) {
68a351c5 1210 handle_usb_error(status, __func__, serial->parent);
8ef5ba63
DJB		 1211 return;
1212 }
1213
1214 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1215 D1("Actual length = %d\n", urb->actual_length);
1216 DUMP1(urb->transfer_buffer, urb->actual_length);
1217
1218 /* Anyone listening? */
5ce76e77 1219 if (serial->port.count == 0)
8ef5ba63
DJB		 1220 return;
1221
1222 if (status == 0) {
5591c75d
JP		 1223 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1224 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
8ef5ba63
DJB		 1225 /* Valid data, handle RX data */
1226 spin_lock(&serial->serial_lock);
1227 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1228 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1229 spin_unlock(&serial->serial_lock);
1230 } else if (status == -ENOENT || status == -ECONNRESET) {
1231 /* Unlinked - check for throttled port. */
1232 D2("Port %d, successfully unlinked urb", serial->minor);
1233 spin_lock(&serial->serial_lock);
1234 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1235 hso_resubmit_rx_bulk_urb(serial, urb);
1236 spin_unlock(&serial->serial_lock);
1237 } else {
1238 D2("Port %d, status = %d for read urb", serial->minor, status);
1239 return;
1240 }
1241}
1242
1243/*
1244 * This needs to be a tasklet otherwise we will
1245 * end up recursively calling this function.
1246 */
0227abc9 1247static void hso_unthrottle_tasklet(struct hso_serial *serial)
8ef5ba63
DJB		 1248{
1249 unsigned long flags;
1250
1251 spin_lock_irqsave(&serial->serial_lock, flags);
1252 if ((serial->parent->port_spec & HSO_INTF_MUX))
1253 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1254 else
1255 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1256 spin_unlock_irqrestore(&serial->serial_lock, flags);
1257}
1258
1259static void hso_unthrottle(struct tty_struct *tty)
1260{
30409420 1261 struct hso_serial *serial = tty->driver_data;
8ef5ba63
DJB		 1262
1263 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1264}
1265
0227abc9 1266static void hso_unthrottle_workfunc(struct work_struct *work)
8ef5ba63
DJB		 1267{
1268 struct hso_serial *serial =
1269 container_of(work, struct hso_serial,
1270 retry_unthrottle_workqueue);
1271 hso_unthrottle_tasklet(serial);
1272}
1273
72dc1c09
GKH		 1274/* open the requested serial port */
1275static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1276{
1277 struct hso_serial *serial = get_serial_by_index(tty->index);
ab153d84 1278 int result;
72dc1c09
GKH		 1279
1280 /* sanity check */
1281 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
e136e303 1282 WARN_ON(1);
72dc1c09
GKH		 1283 tty->driver_data = NULL;
1284 D1("Failed to open port");
1285 return -ENODEV;
1286 }
1287
ab153d84 1288 mutex_lock(&serial->parent->mutex);
ab153d84
DM		 1289 result = usb_autopm_get_interface(serial->parent->interface);
1290 if (result < 0)
72dc1c09
GKH		 1291 goto err_out;
1292
1293 D1("Opening %d", serial->minor);
1294 kref_get(&serial->parent->ref);
1295
1296 /* setup */
1297 tty->driver_data = serial;
9f8c0b08 1298 tty_port_tty_set(&serial->port, tty);
72dc1c09 1299
2f9889a2 1300 /* check for port already opened, if not set the termios */
5ce76e77
JS		 1301 serial->port.count++;
1302 if (serial->port.count == 1) {
8ef5ba63 1303 serial->rx_state = RX_IDLE;
72dc1c09
GKH		 1304 /* Force default termio settings */
1305 _hso_serial_set_termios(tty, NULL);
8ef5ba63
DJB		 1306 tasklet_init(&serial->unthrottle_tasklet,
1307 (void (*)(unsigned long))hso_unthrottle_tasklet,
1308 (unsigned long)serial);
1309 INIT_WORK(&serial->retry_unthrottle_workqueue,
1310 hso_unthrottle_workfunc);
ab153d84
DM		 1311 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1312 if (result) {
72dc1c09 1313 hso_stop_serial_device(serial->parent);
5ce76e77 1314 serial->port.count--;
ab153d84 1315 kref_put(&serial->parent->ref, hso_serial_ref_free);
72dc1c09
GKH		 1316 }
1317 } else {
1318 D1("Port was already open");
1319 }
1320
1321 usb_autopm_put_interface(serial->parent->interface);
1322
1323 /* done */
ab153d84 1324 if (result)
20b9d177 1325 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
72dc1c09 1326err_out:
ab153d84
DM		 1327 mutex_unlock(&serial->parent->mutex);
1328 return result;
72dc1c09
GKH		 1329}
1330
1331/* close the requested serial port */
1332static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1333{
1334 struct hso_serial *serial = tty->driver_data;
1335 u8 usb_gone;
1336
1337 D1("Closing serial port");
1338
e136e303
AC		 1339 /* Open failed, no close cleanup required */
1340 if (serial == NULL)
1341 return;
1342
ab153d84 1343 mutex_lock(&serial->parent->mutex);
72dc1c09
GKH		 1344 usb_gone = serial->parent->usb_gone;
1345
1346 if (!usb_gone)
1347 usb_autopm_get_interface(serial->parent->interface);
1348
1349 /* reset the rts and dtr */
1350 /* do the actual close */
5ce76e77 1351 serial->port.count--;
dcfcb256 1352
5ce76e77
JS		 1353 if (serial->port.count <= 0) {
1354 serial->port.count = 0;
9f8c0b08 1355 tty_port_tty_set(&serial->port, NULL);
72dc1c09
GKH		 1356 if (!usb_gone)
1357 hso_stop_serial_device(serial->parent);
8ef5ba63
DJB		 1358 tasklet_kill(&serial->unthrottle_tasklet);
1359 cancel_work_sync(&serial->retry_unthrottle_workqueue);
72dc1c09 1360 }
8ef5ba63 1361
72dc1c09
GKH		 1362 if (!usb_gone)
1363 usb_autopm_put_interface(serial->parent->interface);
ab153d84
DM		 1364
1365 mutex_unlock(&serial->parent->mutex);
dcfcb256
AK		 1366
1367 kref_put(&serial->parent->ref, hso_serial_ref_free);
72dc1c09
GKH		 1368}
1369
1370/* close the requested serial port */
1371static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1372 int count)
1373{
30409420 1374 struct hso_serial *serial = tty->driver_data;
72dc1c09
GKH		 1375 int space, tx_bytes;
1376 unsigned long flags;
1377
1378 /* sanity check */
1379 if (serial == NULL) {
1380 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1381 return -ENODEV;
1382 }
1383
1384 spin_lock_irqsave(&serial->serial_lock, flags);
1385
1386 space = serial->tx_data_length - serial->tx_buffer_count;
1387 tx_bytes = (count < space) ? count : space;
1388
1389 if (!tx_bytes)
1390 goto out;
1391
1392 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1393 serial->tx_buffer_count += tx_bytes;
1394
1395out:
1396 spin_unlock_irqrestore(&serial->serial_lock, flags);
1397
1398 hso_kick_transmit(serial);
1399 /* done */
1400 return tx_bytes;
1401}
1402
1403/* how much room is there for writing */
1404static int hso_serial_write_room(struct tty_struct *tty)
1405{
30409420 1406 struct hso_serial *serial = tty->driver_data;
72dc1c09
GKH		 1407 int room;
1408 unsigned long flags;
1409
1410 spin_lock_irqsave(&serial->serial_lock, flags);
1411 room = serial->tx_data_length - serial->tx_buffer_count;
1412 spin_unlock_irqrestore(&serial->serial_lock, flags);
1413
1414 /* return free room */
1415 return room;
1416}
1417
1418/* setup the term */
1419static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1420{
30409420 1421 struct hso_serial *serial = tty->driver_data;
72dc1c09
GKH		 1422 unsigned long flags;
1423
1424 if (old)
1425 D5("Termios called with: cflags new[%d] - old[%d]",
adc8d746 1426 tty->termios.c_cflag, old->c_cflag);
72dc1c09
GKH		 1427
1428 /* the actual setup */
1429 spin_lock_irqsave(&serial->serial_lock, flags);
5ce76e77 1430 if (serial->port.count)
72dc1c09
GKH		 1431 _hso_serial_set_termios(tty, old);
1432 else
adc8d746 1433 tty->termios = *old;
72dc1c09
GKH		 1434 spin_unlock_irqrestore(&serial->serial_lock, flags);
1435
1436 /* done */
72dc1c09
GKH		 1437}
1438
1439/* how many characters in the buffer */
1440static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1441{
30409420 1442 struct hso_serial *serial = tty->driver_data;
72dc1c09
GKH		 1443 int chars;
1444 unsigned long flags;
1445
1446 /* sanity check */
1447 if (serial == NULL)
1448 return 0;
1449
1450 spin_lock_irqsave(&serial->serial_lock, flags);
1451 chars = serial->tx_buffer_count;
1452 spin_unlock_irqrestore(&serial->serial_lock, flags);
1453
1454 return chars;
1455}
0227abc9
HE		 1456static int tiocmget_submit_urb(struct hso_serial *serial,
1457 struct hso_tiocmget *tiocmget,
1458 struct usb_device *usb)
542f5482
DJB		 1459{
1460 int result;
1461
1462 if (serial->parent->usb_gone)
1463 return -ENODEV;
1464 usb_fill_int_urb(tiocmget->urb, usb,
1465 usb_rcvintpipe(usb,
1466 tiocmget->endp->
1467 bEndpointAddress & 0x7F),
1468 &tiocmget->serial_state_notification,
1469 sizeof(struct hso_serial_state_notification),
1470 tiocmget_intr_callback, serial,
1471 tiocmget->endp->bInterval);
1472 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1473 if (result) {
1474 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1475 result);
1476 }
1477 return result;
1478
1479}
1480
1481static void tiocmget_intr_callback(struct urb *urb)
1482{
1483 struct hso_serial *serial = urb->context;
1484 struct hso_tiocmget *tiocmget;
1485 int status = urb->status;
1486 u16 UART_state_bitmap, prev_UART_state_bitmap;
1487 struct uart_icount *icount;
1488 struct hso_serial_state_notification *serial_state_notification;
1489 struct usb_device *usb;
1490
1491 /* Sanity checks */
1492 if (!serial)
1493 return;
1494 if (status) {
68a351c5 1495 handle_usb_error(status, __func__, serial->parent);
542f5482
DJB		 1496 return;
1497 }
1498 tiocmget = serial->tiocmget;
1499 if (!tiocmget)
1500 return;
1501 usb = serial->parent->usb;
1502 serial_state_notification = &tiocmget->serial_state_notification;
1503 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1504 serial_state_notification->bNotification != B_NOTIFICATION ||
1505 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1506 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1507 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1508 dev_warn(&usb->dev,
1509 "hso received invalid serial state notification\n");
1510 DUMP(serial_state_notification,
9ce673d5 1511 sizeof(struct hso_serial_state_notification));
542f5482
DJB		 1512 } else {
1513
1514 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1515 UART_state_bitmap);
1516 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1517 icount = &tiocmget->icount;
1518 spin_lock(&serial->serial_lock);
1519 if ((UART_state_bitmap & B_OVERRUN) !=
1520 (prev_UART_state_bitmap & B_OVERRUN))
1521 icount->parity++;
1522 if ((UART_state_bitmap & B_PARITY) !=
1523 (prev_UART_state_bitmap & B_PARITY))
1524 icount->parity++;
1525 if ((UART_state_bitmap & B_FRAMING) !=
1526 (prev_UART_state_bitmap & B_FRAMING))
1527 icount->frame++;
1528 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1529 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1530 icount->rng++;
1531 if ((UART_state_bitmap & B_BREAK) !=
1532 (prev_UART_state_bitmap & B_BREAK))
1533 icount->brk++;
1534 if ((UART_state_bitmap & B_TX_CARRIER) !=
1535 (prev_UART_state_bitmap & B_TX_CARRIER))
1536 icount->dsr++;
1537 if ((UART_state_bitmap & B_RX_CARRIER) !=
1538 (prev_UART_state_bitmap & B_RX_CARRIER))
1539 icount->dcd++;
1540 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1541 spin_unlock(&serial->serial_lock);
1542 tiocmget->intr_completed = 1;
1543 wake_up_interruptible(&tiocmget->waitq);
1544 }
1545 memset(serial_state_notification, 0,
1546 sizeof(struct hso_serial_state_notification));
1547 tiocmget_submit_urb(serial,
1548 tiocmget,
1549 serial->parent->usb);
1550}
1551
1552/*
1553 * next few functions largely stolen from drivers/serial/serial_core.c
1554 */
1555/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1556 * - mask passed in arg for lines of interest
1557 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1558 * Caller should use TIOCGICOUNT to see which one it was
1559 */
1560static int
1561hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1562{
1563 DECLARE_WAITQUEUE(wait, current);
1564 struct uart_icount cprev, cnow;
1565 struct hso_tiocmget *tiocmget;
1566 int ret;
1567
1568 tiocmget = serial->tiocmget;
1569 if (!tiocmget)
1570 return -ENOENT;
1571 /*
1572 * note the counters on entry
1573 */
1574 spin_lock_irq(&serial->serial_lock);
1575 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1576 spin_unlock_irq(&serial->serial_lock);
1577 add_wait_queue(&tiocmget->waitq, &wait);
1578 for (;;) {
1579 spin_lock_irq(&serial->serial_lock);
1580 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1581 spin_unlock_irq(&serial->serial_lock);
1582 set_current_state(TASK_INTERRUPTIBLE);
1583 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1584 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1585 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1586 ret = 0;
1587 break;
1588 }
1589 schedule();
1590 /* see if a signal did it */
1591 if (signal_pending(current)) {
1592 ret = -ERESTARTSYS;
1593 break;
1594 }
1595 cprev = cnow;
1596 }
1597 current->state = TASK_RUNNING;
1598 remove_wait_queue(&tiocmget->waitq, &wait);
1599
1600 return ret;
1601}
1602
1603/*
1604 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1605 * Return: write counters to the user passed counter struct
1606 * NB: both 1->0 and 0->1 transitions are counted except for
1607 * RI where only 0->1 is counted.
1608 */
0bca1b91
AC		 1609static int hso_get_count(struct tty_struct *tty,
1610 struct serial_icounter_struct *icount)
542f5482 1611{
542f5482 1612 struct uart_icount cnow;
30409420 1613 struct hso_serial *serial = tty->driver_data;
542f5482
DJB		 1614 struct hso_tiocmget *tiocmget = serial->tiocmget;
1615
22ad7499 1616 memset(icount, 0, sizeof(struct serial_icounter_struct));
7011e660 1617
542f5482
DJB		 1618 if (!tiocmget)
1619 return -ENOENT;
1620 spin_lock_irq(&serial->serial_lock);
1621 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1622 spin_unlock_irq(&serial->serial_lock);
1623
0bca1b91
AC		 1624 icount->cts = cnow.cts;
1625 icount->dsr = cnow.dsr;
1626 icount->rng = cnow.rng;
1627 icount->dcd = cnow.dcd;
1628 icount->rx = cnow.rx;
1629 icount->tx = cnow.tx;
1630 icount->frame = cnow.frame;
1631 icount->overrun = cnow.overrun;
1632 icount->parity = cnow.parity;
1633 icount->brk = cnow.brk;
1634 icount->buf_overrun = cnow.buf_overrun;
542f5482 1635
0bca1b91 1636 return 0;
542f5482
DJB		 1637}
1638
72dc1c09 1639
60b33c13 1640static int hso_serial_tiocmget(struct tty_struct *tty)
72dc1c09 1641{
542f5482 1642 int retval;
30409420 1643 struct hso_serial *serial = tty->driver_data;
542f5482
DJB		 1644 struct hso_tiocmget *tiocmget;
1645 u16 UART_state_bitmap;
72dc1c09
GKH		 1646
1647 /* sanity check */
1648 if (!serial) {
1649 D1("no tty structures");
1650 return -EINVAL;
1651 }
542f5482
DJB		 1652 spin_lock_irq(&serial->serial_lock);
1653 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
72dc1c09 1654 ((serial->dtr_state) ? TIOCM_DTR : 0);
542f5482
DJB		 1655 tiocmget = serial->tiocmget;
1656 if (tiocmget) {
1657
1658 UART_state_bitmap = le16_to_cpu(
1659 tiocmget->prev_UART_state_bitmap);
1660 if (UART_state_bitmap & B_RING_SIGNAL)
1661 retval |= TIOCM_RNG;
1662 if (UART_state_bitmap & B_RX_CARRIER)
1663 retval |= TIOCM_CD;
1664 if (UART_state_bitmap & B_TX_CARRIER)
1665 retval |= TIOCM_DSR;
1666 }
1667 spin_unlock_irq(&serial->serial_lock);
1668 return retval;
72dc1c09
GKH		 1669}
1670
20b9d177 1671static int hso_serial_tiocmset(struct tty_struct *tty,
72dc1c09
GKH		 1672 unsigned int set, unsigned int clear)
1673{
1674 int val = 0;
1675 unsigned long flags;
1676 int if_num;
30409420 1677 struct hso_serial *serial = tty->driver_data;
72dc1c09
GKH		 1678
1679 /* sanity check */
1680 if (!serial) {
1681 D1("no tty structures");
1682 return -EINVAL;
1683 }
0e0367e9
JD		 1684
1685 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1686 return -EINVAL;
1687
72dc1c09
GKH		 1688 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1689
1690 spin_lock_irqsave(&serial->serial_lock, flags);
1691 if (set & TIOCM_RTS)
1692 serial->rts_state = 1;
1693 if (set & TIOCM_DTR)
1694 serial->dtr_state = 1;
1695
1696 if (clear & TIOCM_RTS)
1697 serial->rts_state = 0;
1698 if (clear & TIOCM_DTR)
1699 serial->dtr_state = 0;
1700
1701 if (serial->dtr_state)
1702 val |= 0x01;
1703 if (serial->rts_state)
1704 val |= 0x02;
1705
1706 spin_unlock_irqrestore(&serial->serial_lock, flags);
1707
1708 return usb_control_msg(serial->parent->usb,
1709 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1710 0x21, val, if_num, NULL, 0,
1711 USB_CTRL_SET_TIMEOUT);
1712}
1713
6caa76b7 1714static int hso_serial_ioctl(struct tty_struct *tty,
542f5482
DJB		 1715 unsigned int cmd, unsigned long arg)
1716{
30409420 1717 struct hso_serial *serial = tty->driver_data;
542f5482
DJB		 1718 int ret = 0;
1719 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1720
1721 if (!serial)
1722 return -ENODEV;
1723 switch (cmd) {
1724 case TIOCMIWAIT:
1725 ret = hso_wait_modem_status(serial, arg);
1726 break;
542f5482
DJB		 1727 default:
1728 ret = -ENOIOCTLCMD;
1729 break;
1730 }
1731 return ret;
1732}
1733
1734
72dc1c09
GKH		 1735/* starts a transmit */
1736static void hso_kick_transmit(struct hso_serial *serial)
1737{
1738 u8 *temp;
1739 unsigned long flags;
1740 int res;
1741
1742 spin_lock_irqsave(&serial->serial_lock, flags);
1743 if (!serial->tx_buffer_count)
1744 goto out;
1745
1746 if (serial->tx_urb_used)
1747 goto out;
1748
1749 /* Wakeup USB interface if necessary */
1750 if (hso_get_activity(serial->parent) == -EAGAIN)
1751 goto out;
1752
1753 /* Switch pointers around to avoid memcpy */
1754 temp = serial->tx_buffer;
1755 serial->tx_buffer = serial->tx_data;
1756 serial->tx_data = temp;
1757 serial->tx_data_count = serial->tx_buffer_count;
1758 serial->tx_buffer_count = 0;
1759
1760 /* If temp is set, it means we switched buffers */
1761 if (temp && serial->write_data) {
1762 res = serial->write_data(serial);
1763 if (res >= 0)
1764 serial->tx_urb_used = 1;
1765 }
1766out:
1767 spin_unlock_irqrestore(&serial->serial_lock, flags);
1768}
1769
1770/* make a request (for reading and writing data to muxed serial port) */
1771static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1772 struct urb *ctrl_urb,
1773 struct usb_ctrlrequest *ctrl_req,
1774 u8 *ctrl_urb_data, u32 size)
1775{
1776 int result;
1777 int pipe;
1778
1779 /* Sanity check */
1780 if (!serial || !ctrl_urb || !ctrl_req) {
1781 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1782 return -EINVAL;
1783 }
1784
1785 /* initialize */
1786 ctrl_req->wValue = 0;
b74f62c1
DJB		 1787 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1788 ctrl_req->wLength = cpu_to_le16(size);
72dc1c09
GKH		 1789
1790 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1791 /* Reading command */
1792 ctrl_req->bRequestType = USB_DIR_IN |
1793 USB_TYPE_OPTION_VENDOR |
1794 USB_RECIP_INTERFACE;
1795 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1796 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1797 } else {
1798 /* Writing command */
1799 ctrl_req->bRequestType = USB_DIR_OUT |
1800 USB_TYPE_OPTION_VENDOR |
1801 USB_RECIP_INTERFACE;
1802 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1803 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1804 }
1805 /* syslog */
1806 D2("%s command (%02x) len: %d, port: %d",
1807 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1808 ctrl_req->bRequestType, ctrl_req->wLength, port);
1809
1810 /* Load ctrl urb */
1811 ctrl_urb->transfer_flags = 0;
1812 usb_fill_control_urb(ctrl_urb,
1813 serial->parent->usb,
1814 pipe,
1815 (u8 *) ctrl_req,
1816 ctrl_urb_data, size, ctrl_callback, serial);
1817 /* Send it on merry way */
1818 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1819 if (result) {
1820 dev_err(&ctrl_urb->dev->dev,
8a5c9c49 1821 "%s failed submit ctrl_urb %d type %d\n", __func__,
72dc1c09
GKH		 1822 result, type);
1823 return result;
1824 }
1825
1826 /* done */
1827 return size;
1828}
1829
1830/* called by intr_callback when read occurs */
1831static int hso_mux_serial_read(struct hso_serial *serial)
1832{
1833 if (!serial)
1834 return -EINVAL;
1835
1836 /* clean data */
1837 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1838 /* make the request */
1839
1840 if (serial->num_rx_urbs != 1) {
1841 dev_err(&serial->parent->interface->dev,
1842 "ERROR: mux'd reads with multiple buffers "
1843 "not possible\n");
1844 return 0;
1845 }
1846 return mux_device_request(serial,
1847 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1848 serial->parent->port_spec & HSO_PORT_MASK,
1849 serial->rx_urb[0],
1850 &serial->ctrl_req_rx,
1851 serial->rx_data[0], serial->rx_data_length);
1852}
1853
1854/* used for muxed serial port callback (muxed serial read) */
1855static void intr_callback(struct urb *urb)
1856{
1857 struct hso_shared_int *shared_int = urb->context;
1858 struct hso_serial *serial;
1859 unsigned char *port_req;
1860 int status = urb->status;
1861 int i;
1862
1863 usb_mark_last_busy(urb->dev);
1864
1865 /* sanity check */
1866 if (!shared_int)
1867 return;
1868
1869 /* status check */
1870 if (status) {
68a351c5 1871 handle_usb_error(status, __func__, NULL);
72dc1c09
GKH		 1872 return;
1873 }
1874 D4("\n--- Got intr callback 0x%02X ---", status);
1875
1876 /* what request? */
1877 port_req = urb->transfer_buffer;
1878 D4(" port_req = 0x%.2X\n", *port_req);
1879 /* loop over all muxed ports to find the one sending this */
1880 for (i = 0; i < 8; i++) {
1881 /* max 8 channels on MUX */
1882 if (*port_req & (1 << i)) {
1883 serial = get_serial_by_shared_int_and_type(shared_int,
1884 (1 << i));
1885 if (serial != NULL) {
1886 D1("Pending read interrupt on port %d\n", i);
8ef5ba63 1887 spin_lock(&serial->serial_lock);
f4763e96 1888 if (serial->rx_state == RX_IDLE &&
5ce76e77 1889 serial->port.count > 0) {
72dc1c09
GKH		 1890 /* Setup and send a ctrl req read on
1891 * port i */
f4763e96 1892 if (!serial->rx_urb_filled[0]) {
8ef5ba63
DJB		 1893 serial->rx_state = RX_SENT;
1894 hso_mux_serial_read(serial);
1895 } else
1896 serial->rx_state = RX_PENDING;
72dc1c09 1897 } else {
f4763e96
JD		 1898 D1("Already a read pending on "
1899 "port %d or port not open\n", i);
72dc1c09 1900 }
8ef5ba63 1901 spin_unlock(&serial->serial_lock);
72dc1c09
GKH		 1902 }
1903 }
1904 }
1905 /* Resubmit interrupt urb */
1906 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1907}
1908
1909/* called for writing to muxed serial port */
1910static int hso_mux_serial_write_data(struct hso_serial *serial)
1911{
1912 if (NULL == serial)
1913 return -EINVAL;
1914
1915 return mux_device_request(serial,
1916 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1917 serial->parent->port_spec & HSO_PORT_MASK,
1918 serial->tx_urb,
1919 &serial->ctrl_req_tx,
1920 serial->tx_data, serial->tx_data_count);
1921}
1922
1923/* write callback for Diag and CS port */
1924static void hso_std_serial_write_bulk_callback(struct urb *urb)
1925{
1926 struct hso_serial *serial = urb->context;
1927 int status = urb->status;
e136e303 1928 struct tty_struct *tty;
72dc1c09
GKH		 1929
1930 /* sanity check */
1931 if (!serial) {
1932 D1("serial == NULL");
1933 return;
1934 }
1935
1936 spin_lock(&serial->serial_lock);
1937 serial->tx_urb_used = 0;
1938 spin_unlock(&serial->serial_lock);
1939 if (status) {
68a351c5 1940 handle_usb_error(status, __func__, serial->parent);
72dc1c09
GKH		 1941 return;
1942 }
1943 hso_put_activity(serial->parent);
9f8c0b08 1944 tty = tty_port_tty_get(&serial->port);
e136e303
AC		 1945 if (tty) {
1946 tty_wakeup(tty);
1947 tty_kref_put(tty);
1948 }
72dc1c09
GKH		 1949 hso_kick_transmit(serial);
1950
1951 D1(" ");
72dc1c09
GKH		 1952}
1953
1954/* called for writing diag or CS serial port */
1955static int hso_std_serial_write_data(struct hso_serial *serial)
1956{
1957 int count = serial->tx_data_count;
1958 int result;
1959
1960 usb_fill_bulk_urb(serial->tx_urb,
1961 serial->parent->usb,
1962 usb_sndbulkpipe(serial->parent->usb,
1963 serial->out_endp->
1964 bEndpointAddress & 0x7F),
1965 serial->tx_data, serial->tx_data_count,
1966 hso_std_serial_write_bulk_callback, serial);
1967
1968 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1969 if (result) {
1970 dev_warn(&serial->parent->usb->dev,
1971 "Failed to submit urb - res %d\n", result);
1972 return result;
1973 }
1974
1975 return count;
1976}
1977
1978/* callback after read or write on muxed serial port */
1979static void ctrl_callback(struct urb *urb)
1980{
1981 struct hso_serial *serial = urb->context;
1982 struct usb_ctrlrequest *req;
1983 int status = urb->status;
1984
1985 /* sanity check */
1986 if (!serial)
1987 return;
1988
1989 spin_lock(&serial->serial_lock);
1990 serial->tx_urb_used = 0;
1991 spin_unlock(&serial->serial_lock);
1992 if (status) {
68a351c5 1993 handle_usb_error(status, __func__, serial->parent);
72dc1c09
GKH		 1994 return;
1995 }
1996
1997 /* what request? */
1998 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1999 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2000 D4("Actual length of urb = %d\n", urb->actual_length);
2001 DUMP1(urb->transfer_buffer, urb->actual_length);
2002
2003 if (req->bRequestType ==
2004 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2005 /* response to a read command */
8ef5ba63
DJB		 2006 serial->rx_urb_filled[0] = 1;
2007 spin_lock(&serial->serial_lock);
2008 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2009 spin_unlock(&serial->serial_lock);
72dc1c09 2010 } else {
9f8c0b08 2011 struct tty_struct *tty = tty_port_tty_get(&serial->port);
72dc1c09 2012 hso_put_activity(serial->parent);
9f8c0b08 2013 if (tty) {
e136e303 2014 tty_wakeup(tty);
9f8c0b08
JS		 2015 tty_kref_put(tty);
2016 }
72dc1c09
GKH		 2017 /* response to a write command */
2018 hso_kick_transmit(serial);
2019 }
2020}
2021
2022/* handle RX data for serial port */
8ef5ba63 2023static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
72dc1c09 2024{
e136e303 2025 struct tty_struct *tty;
8ef5ba63
DJB		 2026 int write_length_remaining = 0;
2027 int curr_write_len;
e136e303 2028
72dc1c09
GKH		 2029 /* Sanity check */
2030 if (urb == NULL || serial == NULL) {
2031 D1("serial = NULL");
8ef5ba63 2032 return -2;
72dc1c09
GKH		 2033 }
2034
9f8c0b08 2035 tty = tty_port_tty_get(&serial->port);
e136e303 2036
72dc1c09 2037 /* Push data to tty */
2e124b4a
JS		 2038 write_length_remaining = urb->actual_length -
2039 serial->curr_rx_urb_offset;
2040 D1("data to push to tty");
2041 while (write_length_remaining) {
2042 if (tty && test_bit(TTY_THROTTLED, &tty->flags)) {
2043 tty_kref_put(tty);
2044 return -1;
72dc1c09 2045 }
2e124b4a
JS		 2046 curr_write_len = tty_insert_flip_string(&serial->port,
2047 urb->transfer_buffer + serial->curr_rx_urb_offset,
2048 write_length_remaining);
2049 serial->curr_rx_urb_offset += curr_write_len;
2050 write_length_remaining -= curr_write_len;
2051 tty_flip_buffer_push(&serial->port);
72dc1c09 2052 }
2e124b4a
JS		 2053 tty_kref_put(tty);
2054
8ef5ba63
DJB		 2055 if (write_length_remaining == 0) {
2056 serial->curr_rx_urb_offset = 0;
2057 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
72dc1c09 2058 }
8ef5ba63 2059 return write_length_remaining;
72dc1c09
GKH		 2060}
2061
8ef5ba63 2062
72dc1c09
GKH		 2063/* Base driver functions */
2064
2065static void hso_log_port(struct hso_device *hso_dev)
2066{
2067 char *port_type;
2068 char port_dev[20];
2069
2070 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2071 case HSO_PORT_CONTROL:
2072 port_type = "Control";
2073 break;
2074 case HSO_PORT_APP:
2075 port_type = "Application";
2076 break;
2077 case HSO_PORT_GPS:
2078 port_type = "GPS";
2079 break;
2080 case HSO_PORT_GPS_CONTROL:
2081 port_type = "GPS control";
2082 break;
2083 case HSO_PORT_APP2:
2084 port_type = "Application2";
2085 break;
2086 case HSO_PORT_PCSC:
2087 port_type = "PCSC";
2088 break;
2089 case HSO_PORT_DIAG:
2090 port_type = "Diagnostic";
2091 break;
2092 case HSO_PORT_DIAG2:
2093 port_type = "Diagnostic2";
2094 break;
2095 case HSO_PORT_MODEM:
2096 port_type = "Modem";
2097 break;
2098 case HSO_PORT_NETWORK:
2099 port_type = "Network";
2100 break;
2101 default:
2102 port_type = "Unknown";
2103 break;
2104 }
2105 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2106 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2107 } else
2108 sprintf(port_dev, "/dev/%s%d", tty_filename,
2109 dev2ser(hso_dev)->minor);
2110
2111 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2112 port_type, port_dev);
2113}
2114
2115static int hso_start_net_device(struct hso_device *hso_dev)
2116{
2117 int i, result = 0;
2118 struct hso_net *hso_net = dev2net(hso_dev);
2119
2120 if (!hso_net)
2121 return -ENODEV;
2122
2123 /* send URBs for all read buffers */
2124 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2125
2126 /* Prep a receive URB */
2127 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2128 hso_dev->usb,
2129 usb_rcvbulkpipe(hso_dev->usb,
2130 hso_net->in_endp->
2131 bEndpointAddress & 0x7F),
2132 hso_net->mux_bulk_rx_buf_pool[i],
2133 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2134 hso_net);
2135
2136 /* Put it out there so the device can send us stuff */
2137 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2138 GFP_NOIO);
2139 if (result)
2140 dev_warn(&hso_dev->usb->dev,
2141 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2142 i, result);
2143 }
2144
2145 return result;
2146}
2147
2148static int hso_stop_net_device(struct hso_device *hso_dev)
2149{
2150 int i;
2151 struct hso_net *hso_net = dev2net(hso_dev);
2152
2153 if (!hso_net)
2154 return -ENODEV;
2155
2156 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2157 if (hso_net->mux_bulk_rx_urb_pool[i])
2158 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2159
2160 }
2161 if (hso_net->mux_bulk_tx_urb)
2162 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2163
2164 return 0;
2165}
2166
2167static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2168{
2169 int i, result = 0;
2170 struct hso_serial *serial = dev2ser(hso_dev);
2171
2172 if (!serial)
2173 return -ENODEV;
2174
2175 /* If it is not the MUX port fill in and submit a bulk urb (already
2176 * allocated in hso_serial_start) */
2177 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2178 for (i = 0; i < serial->num_rx_urbs; i++) {
2179 usb_fill_bulk_urb(serial->rx_urb[i],
2180 serial->parent->usb,
2181 usb_rcvbulkpipe(serial->parent->usb,
2182 serial->in_endp->
2183 bEndpointAddress &
2184 0x7F),
2185 serial->rx_data[i],
2186 serial->rx_data_length,
2187 hso_std_serial_read_bulk_callback,
2188 serial);
2189 result = usb_submit_urb(serial->rx_urb[i], flags);
2190 if (result) {
2191 dev_warn(&serial->parent->usb->dev,
2192 "Failed to submit urb - res %d\n",
2193 result);
2194 break;
2195 }
2196 }
2197 } else {
2198 mutex_lock(&serial->shared_int->shared_int_lock);
2199 if (!serial->shared_int->use_count) {
2200 result =
2201 hso_mux_submit_intr_urb(serial->shared_int,
2202 hso_dev->usb, flags);
2203 }
2204 serial->shared_int->use_count++;
2205 mutex_unlock(&serial->shared_int->shared_int_lock);
2206 }
542f5482
DJB		 2207 if (serial->tiocmget)
2208 tiocmget_submit_urb(serial,
2209 serial->tiocmget,
2210 serial->parent->usb);
72dc1c09
GKH		 2211 return result;
2212}
2213
2214static int hso_stop_serial_device(struct hso_device *hso_dev)
2215{
2216 int i;
2217 struct hso_serial *serial = dev2ser(hso_dev);
542f5482 2218 struct hso_tiocmget *tiocmget;
72dc1c09
GKH		 2219
2220 if (!serial)
2221 return -ENODEV;
2222
2223 for (i = 0; i < serial->num_rx_urbs; i++) {
8ef5ba63 2224 if (serial->rx_urb[i]) {
72dc1c09 2225 usb_kill_urb(serial->rx_urb[i]);
8ef5ba63
DJB		 2226 serial->rx_urb_filled[i] = 0;
2227 }
72dc1c09 2228 }
8ef5ba63
DJB		 2229 serial->curr_rx_urb_idx = 0;
2230 serial->curr_rx_urb_offset = 0;
72dc1c09
GKH		 2231
2232 if (serial->tx_urb)
2233 usb_kill_urb(serial->tx_urb);
2234
2235 if (serial->shared_int) {
2236 mutex_lock(&serial->shared_int->shared_int_lock);
2237 if (serial->shared_int->use_count &&
2238 (--serial->shared_int->use_count == 0)) {
2239 struct urb *urb;
2240
2241 urb = serial->shared_int->shared_intr_urb;
2242 if (urb)
2243 usb_kill_urb(urb);
2244 }
2245 mutex_unlock(&serial->shared_int->shared_int_lock);
2246 }
542f5482
DJB		 2247 tiocmget = serial->tiocmget;
2248 if (tiocmget) {
2249 wake_up_interruptible(&tiocmget->waitq);
2250 usb_kill_urb(tiocmget->urb);
2251 }
72dc1c09
GKH		 2252
2253 return 0;
2254}
2255
2256static void hso_serial_common_free(struct hso_serial *serial)
2257{
2258 int i;
2259
2260 if (serial->parent->dev)
2261 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2262
2263 tty_unregister_device(tty_drv, serial->minor);
2264
2265 for (i = 0; i < serial->num_rx_urbs; i++) {
2266 /* unlink and free RX URB */
2267 usb_free_urb(serial->rx_urb[i]);
2268 /* free the RX buffer */
2269 kfree(serial->rx_data[i]);
2270 }
2271
2272 /* unlink and free TX URB */
2273 usb_free_urb(serial->tx_urb);
2274 kfree(serial->tx_data);
191c5f10 2275 tty_port_destroy(&serial->port);
72dc1c09
GKH		 2276}
2277
2278static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2279 int rx_size, int tx_size)
2280{
2281 struct device *dev;
2282 int minor;
2283 int i;
2284
191c5f10
JS		 2285 tty_port_init(&serial->port);
2286
72dc1c09
GKH		 2287 minor = get_free_serial_index();
2288 if (minor < 0)
2289 goto exit;
2290
2291 /* register our minor number */
734cc178
JS		 2292 serial->parent->dev = tty_port_register_device(&serial->port, tty_drv,
2293 minor, &serial->parent->interface->dev);
72dc1c09 2294 dev = serial->parent->dev;
1aec5bdf 2295 dev_set_drvdata(dev, serial->parent);
72dc1c09
GKH		 2296 i = device_create_file(dev, &dev_attr_hsotype);
2297
2298 /* fill in specific data for later use */
2299 serial->minor = minor;
2300 serial->magic = HSO_SERIAL_MAGIC;
2301 spin_lock_init(&serial->serial_lock);
2302 serial->num_rx_urbs = num_urbs;
2303
2304 /* RX, allocate urb and initialize */
2305
2306 /* prepare our RX buffer */
2307 serial->rx_data_length = rx_size;
2308 for (i = 0; i < serial->num_rx_urbs; i++) {
2309 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2310 if (!serial->rx_urb[i]) {
2311 dev_err(dev, "Could not allocate urb?\n");
2312 goto exit;
2313 }
2314 serial->rx_urb[i]->transfer_buffer = NULL;
2315 serial->rx_urb[i]->transfer_buffer_length = 0;
2316 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2317 GFP_KERNEL);
38673c82 2318 if (!serial->rx_data[i])
72dc1c09 2319 goto exit;
72dc1c09
GKH		 2320 }
2321
2322 /* TX, allocate urb and initialize */
2323 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2324 if (!serial->tx_urb) {
2325 dev_err(dev, "Could not allocate urb?\n");
2326 goto exit;
2327 }
2328 serial->tx_urb->transfer_buffer = NULL;
2329 serial->tx_urb->transfer_buffer_length = 0;
2330 /* prepare our TX buffer */
2331 serial->tx_data_count = 0;
2332 serial->tx_buffer_count = 0;
2333 serial->tx_data_length = tx_size;
2334 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
38673c82 2335 if (!serial->tx_data)
72dc1c09 2336 goto exit;
38673c82 2337
72dc1c09 2338 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
38673c82 2339 if (!serial->tx_buffer)
72dc1c09 2340 goto exit;
72dc1c09
GKH		 2341
2342 return 0;
2343exit:
2344 hso_serial_common_free(serial);
2345 return -1;
2346}
2347
72dc1c09
GKH		 2348/* Creates a general hso device */
2349static struct hso_device *hso_create_device(struct usb_interface *intf,
2350 int port_spec)
2351{
2352 struct hso_device *hso_dev;
2353
2354 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2355 if (!hso_dev)
2356 return NULL;
2357
2358 hso_dev->port_spec = port_spec;
2359 hso_dev->usb = interface_to_usbdev(intf);
2360 hso_dev->interface = intf;
2361 kref_init(&hso_dev->ref);
ab153d84
DM		 2362 mutex_init(&hso_dev->mutex);
2363
72dc1c09
GKH		 2364 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2365 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
68a351c5 2366 INIT_WORK(&hso_dev->reset_device, reset_device);
72dc1c09
GKH		 2367
2368 return hso_dev;
2369}
2370
2371/* Removes a network device in the network device table */
2372static int remove_net_device(struct hso_device *hso_dev)
2373{
2374 int i;
2375
2376 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2377 if (network_table[i] == hso_dev) {
2378 network_table[i] = NULL;
2379 break;
2380 }
2381 }
2382 if (i == HSO_MAX_NET_DEVICES)
2383 return -1;
2384 return 0;
2385}
2386
2387/* Frees our network device */
2388static void hso_free_net_device(struct hso_device *hso_dev)
2389{
2390 int i;
2391 struct hso_net *hso_net = dev2net(hso_dev);
2392
2393 if (!hso_net)
2394 return;
2395
3b7d2b31
JD		 2396 remove_net_device(hso_net->parent);
2397
5e2cd082 2398 if (hso_net->net)
3b7d2b31 2399 unregister_netdev(hso_net->net);
3b7d2b31 2400
72dc1c09
GKH		 2401 /* start freeing */
2402 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2403 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2404 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
3b7d2b31 2405 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
72dc1c09
GKH		 2406 }
2407 usb_free_urb(hso_net->mux_bulk_tx_urb);
2408 kfree(hso_net->mux_bulk_tx_buf);
3b7d2b31 2409 hso_net->mux_bulk_tx_buf = NULL;
ab153d84 2410
5e2cd082
GK		 2411 if (hso_net->net)
2412 free_netdev(hso_net->net);
2413
e44578ea 2414 kfree(hso_dev);
72dc1c09
GKH		 2415}
2416
c266cb4e
SH		 2417static const struct net_device_ops hso_netdev_ops = {
2418 .ndo_open = hso_net_open,
2419 .ndo_stop = hso_net_close,
2420 .ndo_start_xmit = hso_net_start_xmit,
2421 .ndo_tx_timeout = hso_net_tx_timeout,
2422};
2423
72dc1c09
GKH		 2424/* initialize the network interface */
2425static void hso_net_init(struct net_device *net)
2426{
2427 struct hso_net *hso_net = netdev_priv(net);
2428
2429 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2430
2431 /* fill in the other fields */
c266cb4e 2432 net->netdev_ops = &hso_netdev_ops;
72dc1c09
GKH		 2433 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2434 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2435 net->type = ARPHRD_NONE;
2436 net->mtu = DEFAULT_MTU - 14;
2437 net->tx_queue_len = 10;
2438 SET_ETHTOOL_OPS(net, &ops);
2439
2440 /* and initialize the semaphore */
2441 spin_lock_init(&hso_net->net_lock);
2442}
2443
2444/* Adds a network device in the network device table */
2445static int add_net_device(struct hso_device *hso_dev)
2446{
2447 int i;
2448
2449 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2450 if (network_table[i] == NULL) {
2451 network_table[i] = hso_dev;
2452 break;
2453 }
2454 }
2455 if (i == HSO_MAX_NET_DEVICES)
2456 return -1;
2457 return 0;
2458}
2459
19d337df 2460static int hso_rfkill_set_block(void *data, bool blocked)
72dc1c09
GKH		 2461{
2462 struct hso_device *hso_dev = data;
19d337df 2463 int enabled = !blocked;
72dc1c09
GKH		 2464 int rv;
2465
ab153d84 2466 mutex_lock(&hso_dev->mutex);
72dc1c09
GKH		 2467 if (hso_dev->usb_gone)
2468 rv = 0;
2469 else
2470 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2471 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2472 USB_CTRL_SET_TIMEOUT);
ab153d84 2473 mutex_unlock(&hso_dev->mutex);
72dc1c09
GKH		 2474 return rv;
2475}
2476
19d337df
JB		 2477static const struct rfkill_ops hso_rfkill_ops = {
2478 .set_block = hso_rfkill_set_block,
2479};
2480
72dc1c09
GKH		 2481/* Creates and sets up everything for rfkill */
2482static void hso_create_rfkill(struct hso_device *hso_dev,
2483 struct usb_interface *interface)
2484{
2485 struct hso_net *hso_net = dev2net(hso_dev);
939a9516 2486 struct device *dev = &hso_net->net->dev;
72dc1c09
GKH		 2487 char *rfkn;
2488
72dc1c09 2489 rfkn = kzalloc(20, GFP_KERNEL);
19d337df 2490 if (!rfkn)
939a9516 2491 dev_err(dev, "%s - Out of memory\n", __func__);
19d337df 2492
72dc1c09
GKH		 2493 snprintf(rfkn, 20, "hso-%d",
2494 interface->altsetting->desc.bInterfaceNumber);
19d337df
JB		 2495
2496 hso_net->rfkill = rfkill_alloc(rfkn,
2497 &interface_to_usbdev(interface)->dev,
2498 RFKILL_TYPE_WWAN,
2499 &hso_rfkill_ops, hso_dev);
2500 if (!hso_net->rfkill) {
2501 dev_err(dev, "%s - Out of memory\n", __func__);
2502 kfree(rfkn);
2503 return;
2504 }
72dc1c09 2505 if (rfkill_register(hso_net->rfkill) < 0) {
19d337df 2506 rfkill_destroy(hso_net->rfkill);
72dc1c09 2507 kfree(rfkn);
939a9516
JM		 2508 hso_net->rfkill = NULL;
2509 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
72dc1c09
GKH		 2510 return;
2511 }
2512}
2513
384912ed
MH		 2514static struct device_type hso_type = {
2515 .name = "wwan",
2516};
2517
72dc1c09 2518/* Creates our network device */
0de8ca59
JD		 2519static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2520 int port_spec)
72dc1c09
GKH		 2521{
2522 int result, i;
2523 struct net_device *net;
2524 struct hso_net *hso_net;
2525 struct hso_device *hso_dev;
2526
0de8ca59 2527 hso_dev = hso_create_device(interface, port_spec);
72dc1c09
GKH		 2528 if (!hso_dev)
2529 return NULL;
2530
2531 /* allocate our network device, then we can put in our private data */
2532 /* call hso_net_init to do the basic initialization */
2533 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2534 if (!net) {
2535 dev_err(&interface->dev, "Unable to create ethernet device\n");
2536 goto exit;
2537 }
2538
2539 hso_net = netdev_priv(net);
2540
2541 hso_dev->port_data.dev_net = hso_net;
2542 hso_net->net = net;
2543 hso_net->parent = hso_dev;
2544
2545 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2546 USB_DIR_IN);
2547 if (!hso_net->in_endp) {
2548 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2549 goto exit;
2550 }
2551 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2552 USB_DIR_OUT);
2553 if (!hso_net->out_endp) {
2554 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2555 goto exit;
2556 }
2557 SET_NETDEV_DEV(net, &interface->dev);
384912ed 2558 SET_NETDEV_DEVTYPE(net, &hso_type);
72dc1c09
GKH		 2559
2560 /* registering our net device */
2561 result = register_netdev(net);
2562 if (result) {
2563 dev_err(&interface->dev, "Failed to register device\n");
2564 goto exit;
2565 }
2566
2567 /* start allocating */
2568 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2569 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2570 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2571 dev_err(&interface->dev, "Could not allocate rx urb\n");
2572 goto exit;
2573 }
2574 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2575 GFP_KERNEL);
38673c82 2576 if (!hso_net->mux_bulk_rx_buf_pool[i])
72dc1c09 2577 goto exit;
72dc1c09
GKH		 2578 }
2579 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2580 if (!hso_net->mux_bulk_tx_urb) {
2581 dev_err(&interface->dev, "Could not allocate tx urb\n");
2582 goto exit;
2583 }
2584 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
38673c82 2585 if (!hso_net->mux_bulk_tx_buf)
72dc1c09 2586 goto exit;
72dc1c09
GKH		 2587
2588 add_net_device(hso_dev);
2589
2590 hso_log_port(hso_dev);
2591
2592 hso_create_rfkill(hso_dev, interface);
2593
2594 return hso_dev;
2595exit:
2596 hso_free_net_device(hso_dev);
2597 return NULL;
2598}
2599
542f5482
DJB		 2600static void hso_free_tiomget(struct hso_serial *serial)
2601{
5b89db0e
JJ		 2602 struct hso_tiocmget *tiocmget;
2603 if (!serial)
2604 return;
2605 tiocmget = serial->tiocmget;
542f5482 2606 if (tiocmget) {
5b89db0e
JJ		 2607 usb_free_urb(tiocmget->urb);
2608 tiocmget->urb = NULL;
542f5482 2609 serial->tiocmget = NULL;
3b7d2b31 2610 kfree(tiocmget);
542f5482
DJB		 2611 }
2612}
2613
72dc1c09
GKH		 2614/* Frees an AT channel ( goes for both mux and non-mux ) */
2615static void hso_free_serial_device(struct hso_device *hso_dev)
2616{
2617 struct hso_serial *serial = dev2ser(hso_dev);
2618
2619 if (!serial)
2620 return;
2621 set_serial_by_index(serial->minor, NULL);
2622
2623 hso_serial_common_free(serial);
2624
2625 if (serial->shared_int) {
2626 mutex_lock(&serial->shared_int->shared_int_lock);
2627 if (--serial->shared_int->ref_count == 0)
2628 hso_free_shared_int(serial->shared_int);
2629 else
2630 mutex_unlock(&serial->shared_int->shared_int_lock);
2631 }
542f5482 2632 hso_free_tiomget(serial);
72dc1c09 2633 kfree(serial);
e44578ea 2634 kfree(hso_dev);
72dc1c09
GKH		 2635}
2636
2637/* Creates a bulk AT channel */
2638static struct hso_device *hso_create_bulk_serial_device(
2639 struct usb_interface *interface, int port)
2640{
2641 struct hso_device *hso_dev;
2642 struct hso_serial *serial;
2643 int num_urbs;
542f5482 2644 struct hso_tiocmget *tiocmget;
72dc1c09
GKH		 2645
2646 hso_dev = hso_create_device(interface, port);
2647 if (!hso_dev)
2648 return NULL;
2649
2650 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2651 if (!serial)
2652 goto exit;
2653
2654 serial->parent = hso_dev;
2655 hso_dev->port_data.dev_serial = serial;
2656
58eb17f1 2657 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
72dc1c09 2658 num_urbs = 2;
542f5482
DJB		 2659 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2660 GFP_KERNEL);
2661 /* it isn't going to break our heart if serial->tiocmget
2662 * allocation fails don't bother checking this.
2663 */
2664 if (serial->tiocmget) {
2665 tiocmget = serial->tiocmget;
2666 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2667 if (tiocmget->urb) {
2668 mutex_init(&tiocmget->mutex);
2669 init_waitqueue_head(&tiocmget->waitq);
2670 tiocmget->endp = hso_get_ep(
2671 interface,
2672 USB_ENDPOINT_XFER_INT,
2673 USB_DIR_IN);
2674 } else
2675 hso_free_tiomget(serial);
2676 }
2677 }
72dc1c09
GKH		 2678 else
2679 num_urbs = 1;
2680
2681 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2682 BULK_URB_TX_SIZE))
2683 goto exit;
2684
2685 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2686 USB_DIR_IN);
2687 if (!serial->in_endp) {
2688 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
e57b641d 2689 goto exit2;
72dc1c09
GKH		 2690 }
2691
2692 if (!
2693 (serial->out_endp =
2694 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2695 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
e57b641d 2696 goto exit2;
72dc1c09
GKH		 2697 }
2698
2699 serial->write_data = hso_std_serial_write_data;
2700
2701 /* and record this serial */
2702 set_serial_by_index(serial->minor, serial);
2703
2704 /* setup the proc dirs and files if needed */
2705 hso_log_port(hso_dev);
2706
2707 /* done, return it */
2708 return hso_dev;
e57b641d
AB		 2709
2710exit2:
2711 hso_serial_common_free(serial);
72dc1c09 2712exit:
542f5482 2713 hso_free_tiomget(serial);
72dc1c09 2714 kfree(serial);
e44578ea 2715 kfree(hso_dev);
72dc1c09
GKH		 2716 return NULL;
2717}
2718
2719/* Creates a multiplexed AT channel */
2720static
2721struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2722 int port,
2723 struct hso_shared_int *mux)
2724{
2725 struct hso_device *hso_dev;
2726 struct hso_serial *serial;
2727 int port_spec;
2728
2729 port_spec = HSO_INTF_MUX;
2730 port_spec &= ~HSO_PORT_MASK;
2731
2732 port_spec |= hso_mux_to_port(port);
2733 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2734 return NULL;
2735
2736 hso_dev = hso_create_device(interface, port_spec);
2737 if (!hso_dev)
2738 return NULL;
2739
2740 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2741 if (!serial)
2742 goto exit;
2743
2744 hso_dev->port_data.dev_serial = serial;
2745 serial->parent = hso_dev;
2746
2747 if (hso_serial_common_create
2748 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2749 goto exit;
2750
2751 serial->tx_data_length--;
2752 serial->write_data = hso_mux_serial_write_data;
2753
2754 serial->shared_int = mux;
2755 mutex_lock(&serial->shared_int->shared_int_lock);
2756 serial->shared_int->ref_count++;
2757 mutex_unlock(&serial->shared_int->shared_int_lock);
2758
2759 /* and record this serial */
2760 set_serial_by_index(serial->minor, serial);
2761
2762 /* setup the proc dirs and files if needed */
2763 hso_log_port(hso_dev);
2764
2765 /* done, return it */
2766 return hso_dev;
2767
2768exit:
2769 if (serial) {
2770 tty_unregister_device(tty_drv, serial->minor);
2771 kfree(serial);
2772 }
2773 if (hso_dev)
e44578ea 2774 kfree(hso_dev);
72dc1c09
GKH		 2775 return NULL;
2776
2777}
2778
2779static void hso_free_shared_int(struct hso_shared_int *mux)
2780{
2781 usb_free_urb(mux->shared_intr_urb);
2782 kfree(mux->shared_intr_buf);
2783 mutex_unlock(&mux->shared_int_lock);
2784 kfree(mux);
2785}
2786
2787static
2788struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2789{
2790 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2791
2792 if (!mux)
2793 return NULL;
2794
2795 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2796 USB_DIR_IN);
2797 if (!mux->intr_endp) {
2798 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2799 goto exit;
2800 }
2801
2802 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2803 if (!mux->shared_intr_urb) {
8a5c9c49 2804 dev_err(&interface->dev, "Could not allocate intr urb?\n");
72dc1c09
GKH		 2805 goto exit;
2806 }
d9ced80d
JD		 2807 mux->shared_intr_buf =
2808 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2809 GFP_KERNEL);
38673c82 2810 if (!mux->shared_intr_buf)
72dc1c09 2811 goto exit;
72dc1c09
GKH		 2812
2813 mutex_init(&mux->shared_int_lock);
2814
2815 return mux;
2816
2817exit:
2818 kfree(mux->shared_intr_buf);
2819 usb_free_urb(mux->shared_intr_urb);
2820 kfree(mux);
2821 return NULL;
2822}
2823
2824/* Gets the port spec for a certain interface */
2825static int hso_get_config_data(struct usb_interface *interface)
2826{
2827 struct usb_device *usbdev = interface_to_usbdev(interface);
2828 u8 config_data[17];
2829 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2830 s32 result;
2831
2832 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2833 0x86, 0xC0, 0, 0, config_data, 17,
2834 USB_CTRL_SET_TIMEOUT) != 0x11) {
2835 return -EIO;
2836 }
2837
2838 switch (config_data[if_num]) {
2839 case 0x0:
2840 result = 0;
2841 break;
2842 case 0x1:
2843 result = HSO_PORT_DIAG;
2844 break;
2845 case 0x2:
2846 result = HSO_PORT_GPS;
2847 break;
2848 case 0x3:
2849 result = HSO_PORT_GPS_CONTROL;
2850 break;
2851 case 0x4:
2852 result = HSO_PORT_APP;
2853 break;
2854 case 0x5:
2855 result = HSO_PORT_APP2;
2856 break;
2857 case 0x6:
2858 result = HSO_PORT_CONTROL;
2859 break;
2860 case 0x7:
2861 result = HSO_PORT_NETWORK;
2862 break;
2863 case 0x8:
2864 result = HSO_PORT_MODEM;
2865 break;
2866 case 0x9:
2867 result = HSO_PORT_MSD;
2868 break;
2869 case 0xa:
2870 result = HSO_PORT_PCSC;
2871 break;
2872 case 0xb:
2873 result = HSO_PORT_VOICE;
2874 break;
2875 default:
2876 result = 0;
2877 }
2878
2879 if (result)
2880 result |= HSO_INTF_BULK;
2881
2882 if (config_data[16] & 0x1)
2883 result |= HSO_INFO_CRC_BUG;
2884
2885 return result;
2886}
2887
2888/* called once for each interface upon device insertion */
2889static int hso_probe(struct usb_interface *interface,
2890 const struct usb_device_id *id)
2891{
2892 int mux, i, if_num, port_spec;
2893 unsigned char port_mask;
2894 struct hso_device *hso_dev = NULL;
2895 struct hso_shared_int *shared_int;
2896 struct hso_device *tmp_dev = NULL;
2897
2898 if_num = interface->altsetting->desc.bInterfaceNumber;
2899
2900 /* Get the interface/port specification from either driver_info or from
2901 * the device itself */
2902 if (id->driver_info)
2903 port_spec = ((u32 *)(id->driver_info))[if_num];
2904 else
2905 port_spec = hso_get_config_data(interface);
2906
2907 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2908 dev_err(&interface->dev, "Not our interface\n");
2909 return -ENODEV;
2910 }
2911 /* Check if we need to switch to alt interfaces prior to port
2912 * configuration */
2913 if (interface->num_altsetting > 1)
2914 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2915 interface->needs_remote_wakeup = 1;
2916
2917 /* Allocate new hso device(s) */
2918 switch (port_spec & HSO_INTF_MASK) {
2919 case HSO_INTF_MUX:
2920 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2921 /* Create the network device */
2922 if (!disable_net) {
0de8ca59
JD		 2923 hso_dev = hso_create_net_device(interface,
2924 port_spec);
72dc1c09
GKH		 2925 if (!hso_dev)
2926 goto exit;
2927 tmp_dev = hso_dev;
2928 }
2929 }
2930
2931 if (hso_get_mux_ports(interface, &port_mask))
2932 /* TODO: de-allocate everything */
2933 goto exit;
2934
2935 shared_int = hso_create_shared_int(interface);
2936 if (!shared_int)
2937 goto exit;
2938
2939 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2940 if (port_mask & i) {
2941 hso_dev = hso_create_mux_serial_device(
2942 interface, i, shared_int);
2943 if (!hso_dev)
2944 goto exit;
2945 }
2946 }
2947
2948 if (tmp_dev)
2949 hso_dev = tmp_dev;
2950 break;
2951
2952 case HSO_INTF_BULK:
2953 /* It's a regular bulk interface */
8e65c0ec
FA		 2954 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2955 if (!disable_net)
2956 hso_dev =
2957 hso_create_net_device(interface, port_spec);
2958 } else {
72dc1c09
GKH		 2959 hso_dev =
2960 hso_create_bulk_serial_device(interface, port_spec);
8e65c0ec 2961 }
72dc1c09
GKH		 2962 if (!hso_dev)
2963 goto exit;
2964 break;
2965 default:
2966 goto exit;
2967 }
2968
72dc1c09
GKH		 2969 /* save our data pointer in this device */
2970 usb_set_intfdata(interface, hso_dev);
2971
2972 /* done */
2973 return 0;
2974exit:
2975 hso_free_interface(interface);
2976 return -ENODEV;
2977}
2978
2979/* device removed, cleaning up */
2980static void hso_disconnect(struct usb_interface *interface)
2981{
2982 hso_free_interface(interface);
2983
2984 /* remove reference of our private data */
2985 usb_set_intfdata(interface, NULL);
72dc1c09
GKH		 2986}
2987
2988static void async_get_intf(struct work_struct *data)
2989{
2990 struct hso_device *hso_dev =
2991 container_of(data, struct hso_device, async_get_intf);
2992 usb_autopm_get_interface(hso_dev->interface);
2993}
2994
2995static void async_put_intf(struct work_struct *data)
2996{
2997 struct hso_device *hso_dev =
2998 container_of(data, struct hso_device, async_put_intf);
2999 usb_autopm_put_interface(hso_dev->interface);
3000}
3001
3002static int hso_get_activity(struct hso_device *hso_dev)
3003{
3004 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3005 if (!hso_dev->is_active) {
3006 hso_dev->is_active = 1;
3007 schedule_work(&hso_dev->async_get_intf);
3008 }
3009 }
3010
3011 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3012 return -EAGAIN;
3013
3014 usb_mark_last_busy(hso_dev->usb);
3015
3016 return 0;
3017}
3018
3019static int hso_put_activity(struct hso_device *hso_dev)
3020{
3021 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3022 if (hso_dev->is_active) {
3023 hso_dev->is_active = 0;
3024 schedule_work(&hso_dev->async_put_intf);
3025 return -EAGAIN;
3026 }
3027 }
3028 hso_dev->is_active = 0;
3029 return 0;
3030}
3031
3032/* called by kernel when we need to suspend device */
3033static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3034{
3035 int i, result;
3036
3037 /* Stop all serial ports */
3038 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3039 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3040 result = hso_stop_serial_device(serial_table[i]);
3041 if (result)
3042 goto out;
3043 }
3044 }
3045
3046 /* Stop all network ports */
3047 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3048 if (network_table[i] &&
3049 (network_table[i]->interface == iface)) {
3050 result = hso_stop_net_device(network_table[i]);
3051 if (result)
3052 goto out;
3053 }
3054 }
3055
3056out:
3057 return 0;
3058}
3059
3060/* called by kernel when we need to resume device */
3061static int hso_resume(struct usb_interface *iface)
3062{
3063 int i, result = 0;
3064 struct hso_net *hso_net;
3065
3066 /* Start all serial ports */
3067 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3068 if (serial_table[i] && (serial_table[i]->interface == iface)) {
5ce76e77 3069 if (dev2ser(serial_table[i])->port.count) {
72dc1c09
GKH		 3070 result =
3071 hso_start_serial_device(serial_table[i], GFP_NOIO);
3072 hso_kick_transmit(dev2ser(serial_table[i]));
3073 if (result)
3074 goto out;
3075 }
3076 }
3077 }
3078
3079 /* Start all network ports */
3080 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3081 if (network_table[i] &&
3082 (network_table[i]->interface == iface)) {
3083 hso_net = dev2net(network_table[i]);
89930b7b
DJB		 3084 if (hso_net->flags & IFF_UP) {
3085 /* First transmit any lingering data,
3086 then restart the device. */
3087 if (hso_net->skb_tx_buf) {
3088 dev_dbg(&iface->dev,
3089 "Transmitting"
3090 " lingering data\n");
3091 hso_net_start_xmit(hso_net->skb_tx_buf,
3092 hso_net->net);
3093 hso_net->skb_tx_buf = NULL;
3094 }
3095 result = hso_start_net_device(network_table[i]);
3096 if (result)
3097 goto out;
72dc1c09 3098 }
72dc1c09
GKH		 3099 }
3100 }
3101
3102out:
3103 return result;
3104}
3105
68a351c5
JD		 3106static void reset_device(struct work_struct *data)
3107{
3108 struct hso_device *hso_dev =
3109 container_of(data, struct hso_device, reset_device);
3110 struct usb_device *usb = hso_dev->usb;
3111 int result;
3112
3113 if (hso_dev->usb_gone) {
3114 D1("No reset during disconnect\n");
3115 } else {
3116 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3117 if (result < 0)
3118 D1("unable to lock device for reset: %d\n", result);
3119 else {
3120 usb_reset_device(usb);
3121 usb_unlock_device(usb);
3122 }
3123 }
3124}
3125
72dc1c09
GKH		 3126static void hso_serial_ref_free(struct kref *ref)
3127{
3128 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3129
3130 hso_free_serial_device(hso_dev);
3131}
3132
3133static void hso_free_interface(struct usb_interface *interface)
3134{
3135 struct hso_serial *hso_dev;
e136e303 3136 struct tty_struct *tty;
72dc1c09
GKH		 3137 int i;
3138
3139 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
8e95a202
JP		 3140 if (serial_table[i] &&
3141 (serial_table[i]->interface == interface)) {
72dc1c09 3142 hso_dev = dev2ser(serial_table[i]);
9f8c0b08
JS		 3143 tty = tty_port_tty_get(&hso_dev->port);
3144 if (tty) {
e136e303 3145 tty_hangup(tty);
9f8c0b08
JS		 3146 tty_kref_put(tty);
3147 }
ab153d84 3148 mutex_lock(&hso_dev->parent->mutex);
72dc1c09 3149 hso_dev->parent->usb_gone = 1;
ab153d84
DM		 3150 mutex_unlock(&hso_dev->parent->mutex);
3151 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
72dc1c09
GKH		 3152 }
3153 }
3154
3155 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
8e95a202
JP		 3156 if (network_table[i] &&
3157 (network_table[i]->interface == interface)) {
72dc1c09
GKH		 3158 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3159 /* hso_stop_net_device doesn't stop the net queue since
3160 * traffic needs to start it again when suspended */
3161 netif_stop_queue(dev2net(network_table[i])->net);
3162 hso_stop_net_device(network_table[i]);
3163 cancel_work_sync(&network_table[i]->async_put_intf);
3164 cancel_work_sync(&network_table[i]->async_get_intf);
19d337df 3165 if (rfk) {
72dc1c09 3166 rfkill_unregister(rfk);
19d337df
JB		 3167 rfkill_destroy(rfk);
3168 }
72dc1c09
GKH		 3169 hso_free_net_device(network_table[i]);
3170 }
3171 }
3172}
3173
3174/* Helper functions */
3175
3176/* Get the endpoint ! */
3177static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3178 int type, int dir)
3179{
3180 int i;
3181 struct usb_host_interface *iface = intf->cur_altsetting;
3182 struct usb_endpoint_descriptor *endp;
3183
3184 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3185 endp = &iface->endpoint[i].desc;
3186 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
f201a8a4 3187 (usb_endpoint_type(endp) == type))
72dc1c09
GKH		 3188 return endp;
3189 }
3190
3191 return NULL;
3192}
3193
3194/* Get the byte that describes which ports are enabled */
3195static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3196{
3197 int i;
3198 struct usb_host_interface *iface = intf->cur_altsetting;
3199
3200 if (iface->extralen == 3) {
3201 *ports = iface->extra[2];
3202 return 0;
3203 }
3204
3205 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3206 if (iface->endpoint[i].extralen == 3) {
3207 *ports = iface->endpoint[i].extra[2];
3208 return 0;
3209 }
3210 }
3211
3212 return -1;
3213}
3214
3215/* interrupt urb needs to be submitted, used for serial read of muxed port */
3216static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3217 struct usb_device *usb, gfp_t gfp)
3218{
3219 int result;
3220
3221 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3222 usb_rcvintpipe(usb,
3223 shared_int->intr_endp->bEndpointAddress & 0x7F),
3224 shared_int->shared_intr_buf,
d9ced80d 3225 1,
72dc1c09
GKH		 3226 intr_callback, shared_int,
3227 shared_int->intr_endp->bInterval);
3228
3229 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3230 if (result)
8a5c9c49 3231 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
72dc1c09
GKH		 3232 result);
3233
3234 return result;
3235}
3236
3237/* operations setup of the serial interface */
6c59f569 3238static const struct tty_operations hso_serial_ops = {
72dc1c09
GKH		 3239 .open = hso_serial_open,
3240 .close = hso_serial_close,
3241 .write = hso_serial_write,
3242 .write_room = hso_serial_write_room,
542f5482 3243 .ioctl = hso_serial_ioctl,
72dc1c09
GKH		 3244 .set_termios = hso_serial_set_termios,
3245 .chars_in_buffer = hso_serial_chars_in_buffer,
3246 .tiocmget = hso_serial_tiocmget,
3247 .tiocmset = hso_serial_tiocmset,
0bca1b91 3248 .get_icount = hso_get_count,
8ef5ba63 3249 .unthrottle = hso_unthrottle
72dc1c09
GKH		 3250};
3251
3252static struct usb_driver hso_driver = {
3253 .name = driver_name,
3254 .probe = hso_probe,
3255 .disconnect = hso_disconnect,
3256 .id_table = hso_ids,
3257 .suspend = hso_suspend,
3258 .resume = hso_resume,
9c8f92ae 3259 .reset_resume = hso_resume,
72dc1c09 3260 .supports_autosuspend = 1,
e1f12eb6 3261 .disable_hub_initiated_lpm = 1,
72dc1c09
GKH		 3262};
3263
3264static int __init hso_init(void)
3265{
3266 int i;
3267 int result;
3268
3269 /* put it in the log */
3270 printk(KERN_INFO "hso: %s\n", version);
3271
3272 /* Initialise the serial table semaphore and table */
3273 spin_lock_init(&serial_table_lock);
3274 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3275 serial_table[i] = NULL;
3276
3277 /* allocate our driver using the proper amount of supported minors */
3278 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3279 if (!tty_drv)
3280 return -ENOMEM;
3281
3282 /* fill in all needed values */
72dc1c09
GKH		 3283 tty_drv->driver_name = driver_name;
3284 tty_drv->name = tty_filename;
3285
3286 /* if major number is provided as parameter, use that one */
3287 if (tty_major)
3288 tty_drv->major = tty_major;
3289
3290 tty_drv->minor_start = 0;
72dc1c09
GKH		 3291 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3292 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3293 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3294 tty_drv->init_termios = tty_std_termios;
ac9720c3 3295 hso_init_termios(&tty_drv->init_termios);
72dc1c09
GKH		 3296 tty_set_operations(tty_drv, &hso_serial_ops);
3297
3298 /* register the tty driver */
3299 result = tty_register_driver(tty_drv);
3300 if (result) {
3301 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3302 __func__, result);
d230788f 3303 goto err_free_tty;
72dc1c09
GKH		 3304 }
3305
3306 /* register this module as an usb driver */
3307 result = usb_register(&hso_driver);
3308 if (result) {
3309 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3310 result);
d230788f 3311 goto err_unreg_tty;
72dc1c09
GKH		 3312 }
3313
3314 /* done */
3315 return 0;
d230788f
JS		 3316err_unreg_tty:
3317 tty_unregister_driver(tty_drv);
3318err_free_tty:
3319 put_tty_driver(tty_drv);
3320 return result;
72dc1c09
GKH		 3321}
3322
3323static void __exit hso_exit(void)
3324{
3325 printk(KERN_INFO "hso: unloaded\n");
3326
3327 tty_unregister_driver(tty_drv);
d230788f 3328 put_tty_driver(tty_drv);
72dc1c09
GKH		 3329 /* deregister the usb driver */
3330 usb_deregister(&hso_driver);
3331}
3332
3333/* Module definitions */
3334module_init(hso_init);
3335module_exit(hso_exit);
3336
3337MODULE_AUTHOR(MOD_AUTHOR);
3338MODULE_DESCRIPTION(MOD_DESCRIPTION);
3339MODULE_LICENSE(MOD_LICENSE);
72dc1c09
GKH		 3340
3341/* change the debug level (eg: insmod hso.ko debug=0x04) */
3342MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3343module_param(debug, int, S_IRUGO | S_IWUSR);
3344
3345/* set the major tty number (eg: insmod hso.ko tty_major=245) */
3346MODULE_PARM_DESC(tty_major, "Set the major tty number");
3347module_param(tty_major, int, S_IRUGO | S_IWUSR);
3348
3349/* disable network interface (eg: insmod hso.ko disable_net=1) */
3350MODULE_PARM_DESC(disable_net, "Disable the network interface");
3351module_param(disable_net, int, S_IRUGO | S_IWUSR);
Linux kernel - Deliverables
This page took 0.647509 seconds and 5 git commands to generate.