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Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
[net-next-2.6.git] / drivers / net / usb / hso.c
CommitLineData
72dc1c09
GKH		 1/******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
11cd29b0
DJB		 6 * Filip Aben <f.aben@option.com>
7 * Denis Joseph Barrow <d.barow@option.com>
3b7d2b31 8 * Jan Dumon <j.dumon@option.com>
72dc1c09
GKH		 9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
10 * <ajb@spheresystems.co.uk>
11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
12 * Copyright (C) 2008 Novell, Inc.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
26 * USA
27 *
28 *
29 *****************************************************************************/
30
31/******************************************************************************
32 *
33 * Description of the device:
34 *
35 * Interface 0: Contains the IP network interface on the bulk end points.
36 * The multiplexed serial ports are using the interrupt and
37 * control endpoints.
38 * Interrupt contains a bitmap telling which multiplexed
39 * serialport needs servicing.
40 *
41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
42 * port is opened, as this have a huge impact on the network port
43 * throughput.
44 *
542f5482
DJB		 45 * Interface 2: Standard modem interface - circuit switched interface, this
46 * can be used to make a standard ppp connection however it
47 * should not be used in conjunction with the IP network interface
48 * enabled for USB performance reasons i.e. if using this set
49 * ideally disable_net=1.
72dc1c09
GKH		 50 *
51 *****************************************************************************/
52
53#include <linux/sched.h>
54#include <linux/slab.h>
55#include <linux/init.h>
56#include <linux/delay.h>
57#include <linux/netdevice.h>
58#include <linux/module.h>
59#include <linux/ethtool.h>
60#include <linux/usb.h>
61#include <linux/timer.h>
62#include <linux/tty.h>
63#include <linux/tty_driver.h>
64#include <linux/tty_flip.h>
65#include <linux/kmod.h>
66#include <linux/rfkill.h>
67#include <linux/ip.h>
68#include <linux/uaccess.h>
69#include <linux/usb/cdc.h>
70#include <net/arp.h>
71#include <asm/byteorder.h>
542f5482
DJB		 72#include <linux/serial_core.h>
73#include <linux/serial.h>
72dc1c09
GKH		 74
75
76#define DRIVER_VERSION "1.2"
77#define MOD_AUTHOR "Option Wireless"
78#define MOD_DESCRIPTION "USB High Speed Option driver"
79#define MOD_LICENSE "GPL"
80
81#define HSO_MAX_NET_DEVICES 10
82#define HSO__MAX_MTU 2048
83#define DEFAULT_MTU 1500
84#define DEFAULT_MRU 1500
85
86#define CTRL_URB_RX_SIZE 1024
87#define CTRL_URB_TX_SIZE 64
88
89#define BULK_URB_RX_SIZE 4096
90#define BULK_URB_TX_SIZE 8192
91
92#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
93#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
94#define MUX_BULK_RX_BUF_COUNT 4
95#define USB_TYPE_OPTION_VENDOR 0x20
96
97/* These definitions are used with the struct hso_net flags element */
98/* - use *_bit operations on it. (bit indices not values.) */
99#define HSO_NET_RUNNING 0
100
101#define HSO_NET_TX_TIMEOUT (HZ*10)
102
72dc1c09
GKH		 103#define HSO_SERIAL_MAGIC 0x48534f31
104
105/* Number of ttys to handle */
106#define HSO_SERIAL_TTY_MINORS 256
107
108#define MAX_RX_URBS 2
109
0235f641
GKH		 110static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
111{
112 if (tty)
113 return tty->driver_data;
114 return NULL;
115}
72dc1c09
GKH		 116
117/*****************************************************************************/
118/* Debugging functions */
119/*****************************************************************************/
120#define D__(lvl_, fmt, arg...) \
121 do { \
122 printk(lvl_ "[%d:%s]: " fmt "\n", \
123 __LINE__, __func__, ## arg); \
124 } while (0)
125
126#define D_(lvl, args...) \
127 do { \
128 if (lvl & debug) \
129 D__(KERN_INFO, args); \
130 } while (0)
131
132#define D1(args...) D_(0x01, ##args)
133#define D2(args...) D_(0x02, ##args)
134#define D3(args...) D_(0x04, ##args)
135#define D4(args...) D_(0x08, ##args)
136#define D5(args...) D_(0x10, ##args)
137
138/*****************************************************************************/
139/* Enumerators */
140/*****************************************************************************/
141enum pkt_parse_state {
142 WAIT_IP,
143 WAIT_DATA,
144 WAIT_SYNC
145};
146
147/*****************************************************************************/
148/* Structs */
149/*****************************************************************************/
150
151struct hso_shared_int {
152 struct usb_endpoint_descriptor *intr_endp;
153 void *shared_intr_buf;
154 struct urb *shared_intr_urb;
155 struct usb_device *usb;
156 int use_count;
157 int ref_count;
158 struct mutex shared_int_lock;
159};
160
161struct hso_net {
162 struct hso_device *parent;
163 struct net_device *net;
164 struct rfkill *rfkill;
165
166 struct usb_endpoint_descriptor *in_endp;
167 struct usb_endpoint_descriptor *out_endp;
168
169 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
170 struct urb *mux_bulk_tx_urb;
171 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
172 void *mux_bulk_tx_buf;
173
174 struct sk_buff *skb_rx_buf;
175 struct sk_buff *skb_tx_buf;
176
177 enum pkt_parse_state rx_parse_state;
178 spinlock_t net_lock;
179
180 unsigned short rx_buf_size;
181 unsigned short rx_buf_missing;
182 struct iphdr rx_ip_hdr;
183
184 unsigned long flags;
185};
186
8ef5ba63
DJB		 187enum rx_ctrl_state{
188 RX_IDLE,
189 RX_SENT,
190 RX_PENDING
191};
192
542f5482
DJB		 193#define BM_REQUEST_TYPE (0xa1)
194#define B_NOTIFICATION (0x20)
195#define W_VALUE (0x0)
196#define W_INDEX (0x2)
197#define W_LENGTH (0x2)
198
199#define B_OVERRUN (0x1<<6)
200#define B_PARITY (0x1<<5)
201#define B_FRAMING (0x1<<4)
202#define B_RING_SIGNAL (0x1<<3)
203#define B_BREAK (0x1<<2)
204#define B_TX_CARRIER (0x1<<1)
205#define B_RX_CARRIER (0x1<<0)
206
207struct hso_serial_state_notification {
208 u8 bmRequestType;
209 u8 bNotification;
210 u16 wValue;
211 u16 wIndex;
212 u16 wLength;
213 u16 UART_state_bitmap;
214} __attribute__((packed));
215
216struct hso_tiocmget {
217 struct mutex mutex;
218 wait_queue_head_t waitq;
219 int intr_completed;
220 struct usb_endpoint_descriptor *endp;
221 struct urb *urb;
222 struct hso_serial_state_notification serial_state_notification;
223 u16 prev_UART_state_bitmap;
224 struct uart_icount icount;
225};
226
227
72dc1c09
GKH		 228struct hso_serial {
229 struct hso_device *parent;
230 int magic;
231 u8 minor;
232
233 struct hso_shared_int *shared_int;
234
235 /* rx/tx urb could be either a bulk urb or a control urb depending
236 on which serial port it is used on. */
237 struct urb *rx_urb[MAX_RX_URBS];
238 u8 num_rx_urbs;
239 u8 *rx_data[MAX_RX_URBS];
240 u16 rx_data_length; /* should contain allocated length */
241
242 struct urb *tx_urb;
243 u8 *tx_data;
244 u8 *tx_buffer;
245 u16 tx_data_length; /* should contain allocated length */
246 u16 tx_data_count;
247 u16 tx_buffer_count;
248 struct usb_ctrlrequest ctrl_req_tx;
249 struct usb_ctrlrequest ctrl_req_rx;
250
251 struct usb_endpoint_descriptor *in_endp;
252 struct usb_endpoint_descriptor *out_endp;
253
8ef5ba63 254 enum rx_ctrl_state rx_state;
72dc1c09
GKH		 255 u8 rts_state;
256 u8 dtr_state;
257 unsigned tx_urb_used:1;
258
259 /* from usb_serial_port */
260 struct tty_struct *tty;
261 int open_count;
262 spinlock_t serial_lock;
263
264 int (*write_data) (struct hso_serial *serial);
542f5482 265 struct hso_tiocmget *tiocmget;
8ef5ba63
DJB		 266 /* Hacks required to get flow control
267 * working on the serial receive buffers
268 * so as not to drop characters on the floor.
269 */
270 int curr_rx_urb_idx;
271 u16 curr_rx_urb_offset;
272 u8 rx_urb_filled[MAX_RX_URBS];
273 struct tasklet_struct unthrottle_tasklet;
274 struct work_struct retry_unthrottle_workqueue;
72dc1c09
GKH		 275};
276
277struct hso_device {
278 union {
279 struct hso_serial *dev_serial;
280 struct hso_net *dev_net;
281 } port_data;
282
283 u32 port_spec;
284
285 u8 is_active;
286 u8 usb_gone;
287 struct work_struct async_get_intf;
288 struct work_struct async_put_intf;
289
290 struct usb_device *usb;
291 struct usb_interface *interface;
292
293 struct device *dev;
294 struct kref ref;
ab153d84 295 struct mutex mutex;
72dc1c09
GKH		 296};
297
298/* Type of interface */
299#define HSO_INTF_MASK 0xFF00
300#define HSO_INTF_MUX 0x0100
301#define HSO_INTF_BULK 0x0200
302
303/* Type of port */
304#define HSO_PORT_MASK 0xFF
305#define HSO_PORT_NO_PORT 0x0
306#define HSO_PORT_CONTROL 0x1
307#define HSO_PORT_APP 0x2
308#define HSO_PORT_GPS 0x3
309#define HSO_PORT_PCSC 0x4
310#define HSO_PORT_APP2 0x5
311#define HSO_PORT_GPS_CONTROL 0x6
312#define HSO_PORT_MSD 0x7
313#define HSO_PORT_VOICE 0x8
314#define HSO_PORT_DIAG2 0x9
315#define HSO_PORT_DIAG 0x10
316#define HSO_PORT_MODEM 0x11
317#define HSO_PORT_NETWORK 0x12
318
319/* Additional device info */
320#define HSO_INFO_MASK 0xFF000000
321#define HSO_INFO_CRC_BUG 0x01000000
322
323/*****************************************************************************/
324/* Prototypes */
325/*****************************************************************************/
326/* Serial driver functions */
327static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
328 unsigned int set, unsigned int clear);
329static void ctrl_callback(struct urb *urb);
8ef5ba63 330static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
72dc1c09
GKH		 331static void hso_kick_transmit(struct hso_serial *serial);
332/* Helper functions */
333static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
334 struct usb_device *usb, gfp_t gfp);
335static void log_usb_status(int status, const char *function);
336static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
337 int type, int dir);
338static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
339static void hso_free_interface(struct usb_interface *intf);
340static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
341static int hso_stop_serial_device(struct hso_device *hso_dev);
342static int hso_start_net_device(struct hso_device *hso_dev);
343static void hso_free_shared_int(struct hso_shared_int *shared_int);
344static int hso_stop_net_device(struct hso_device *hso_dev);
345static void hso_serial_ref_free(struct kref *ref);
8ef5ba63
DJB		 346static void hso_std_serial_read_bulk_callback(struct urb *urb);
347static int hso_mux_serial_read(struct hso_serial *serial);
72dc1c09
GKH		 348static void async_get_intf(struct work_struct *data);
349static void async_put_intf(struct work_struct *data);
350static int hso_put_activity(struct hso_device *hso_dev);
351static int hso_get_activity(struct hso_device *hso_dev);
542f5482 352static void tiocmget_intr_callback(struct urb *urb);
72dc1c09
GKH		 353/*****************************************************************************/
354/* Helping functions */
355/*****************************************************************************/
356
357/* #define DEBUG */
358
0235f641
GKH		 359static inline struct hso_net *dev2net(struct hso_device *hso_dev)
360{
361 return hso_dev->port_data.dev_net;
362}
363
364static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
365{
366 return hso_dev->port_data.dev_serial;
367}
72dc1c09
GKH		 368
369/* Debugging functions */
370#ifdef DEBUG
371static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
372 unsigned int len)
373{
0235f641 374 static char name[255];
72dc1c09 375
0235f641
GKH		 376 sprintf(name, "hso[%d:%s]", line_count, func_name);
377 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
72dc1c09
GKH		 378}
379
380#define DUMP(buf_, len_) \
381 dbg_dump(__LINE__, __func__, buf_, len_)
382
383#define DUMP1(buf_, len_) \
384 do { \
385 if (0x01 & debug) \
386 DUMP(buf_, len_); \
387 } while (0)
388#else
389#define DUMP(buf_, len_)
390#define DUMP1(buf_, len_)
391#endif
392
393/* module parameters */
394static int debug;
395static int tty_major;
396static int disable_net;
397
398/* driver info */
399static const char driver_name[] = "hso";
400static const char tty_filename[] = "ttyHS";
401static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
402/* the usb driver itself (registered in hso_init) */
403static struct usb_driver hso_driver;
404/* serial structures */
405static struct tty_driver *tty_drv;
406static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
407static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
408static spinlock_t serial_table_lock;
72dc1c09
GKH		 409
410static const s32 default_port_spec[] = {
411 HSO_INTF_MUX | HSO_PORT_NETWORK,
412 HSO_INTF_BULK | HSO_PORT_DIAG,
413 HSO_INTF_BULK | HSO_PORT_MODEM,
414 0
415};
416
417static const s32 icon321_port_spec[] = {
418 HSO_INTF_MUX | HSO_PORT_NETWORK,
419 HSO_INTF_BULK | HSO_PORT_DIAG2,
420 HSO_INTF_BULK | HSO_PORT_MODEM,
421 HSO_INTF_BULK | HSO_PORT_DIAG,
422 0
423};
424
425#define default_port_device(vendor, product) \
426 USB_DEVICE(vendor, product), \
427 .driver_info = (kernel_ulong_t)default_port_spec
428
429#define icon321_port_device(vendor, product) \
430 USB_DEVICE(vendor, product), \
431 .driver_info = (kernel_ulong_t)icon321_port_spec
432
433/* list of devices we support */
434static const struct usb_device_id hso_ids[] = {
435 {default_port_device(0x0af0, 0x6711)},
436 {default_port_device(0x0af0, 0x6731)},
437 {default_port_device(0x0af0, 0x6751)},
438 {default_port_device(0x0af0, 0x6771)},
439 {default_port_device(0x0af0, 0x6791)},
440 {default_port_device(0x0af0, 0x6811)},
441 {default_port_device(0x0af0, 0x6911)},
442 {default_port_device(0x0af0, 0x6951)},
443 {default_port_device(0x0af0, 0x6971)},
444 {default_port_device(0x0af0, 0x7011)},
445 {default_port_device(0x0af0, 0x7031)},
446 {default_port_device(0x0af0, 0x7051)},
447 {default_port_device(0x0af0, 0x7071)},
448 {default_port_device(0x0af0, 0x7111)},
449 {default_port_device(0x0af0, 0x7211)},
450 {default_port_device(0x0af0, 0x7251)},
451 {default_port_device(0x0af0, 0x7271)},
452 {default_port_device(0x0af0, 0x7311)},
453 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
454 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
455 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
95eacee8 456 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
72dc1c09
GKH		 457 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
458 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
67dd8246 459 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
72dc1c09
GKH		 460 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
461 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
462 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
bab04c3a
DJB		 463 {USB_DEVICE(0x0af0, 0x7701)},
464 {USB_DEVICE(0x0af0, 0x7801)},
465 {USB_DEVICE(0x0af0, 0x7901)},
9961d842
JD		 466 {USB_DEVICE(0x0af0, 0x8200)},
467 {USB_DEVICE(0x0af0, 0x8201)},
468 {USB_DEVICE(0x0af0, 0xd035)},
67dd8246 469 {USB_DEVICE(0x0af0, 0xd055)},
9961d842
JD		 470 {USB_DEVICE(0x0af0, 0xd155)},
471 {USB_DEVICE(0x0af0, 0xd255)},
472 {USB_DEVICE(0x0af0, 0xd057)},
473 {USB_DEVICE(0x0af0, 0xd157)},
474 {USB_DEVICE(0x0af0, 0xd257)},
475 {USB_DEVICE(0x0af0, 0xd357)},
72dc1c09
GKH		 476 {}
477};
478MODULE_DEVICE_TABLE(usb, hso_ids);
479
480/* Sysfs attribute */
481static ssize_t hso_sysfs_show_porttype(struct device *dev,
482 struct device_attribute *attr,
483 char *buf)
484{
485 struct hso_device *hso_dev = dev->driver_data;
486 char *port_name;
487
488 if (!hso_dev)
489 return 0;
490
491 switch (hso_dev->port_spec & HSO_PORT_MASK) {
492 case HSO_PORT_CONTROL:
493 port_name = "Control";
494 break;
495 case HSO_PORT_APP:
496 port_name = "Application";
497 break;
498 case HSO_PORT_APP2:
499 port_name = "Application2";
500 break;
501 case HSO_PORT_GPS:
502 port_name = "GPS";
503 break;
504 case HSO_PORT_GPS_CONTROL:
505 port_name = "GPS Control";
506 break;
507 case HSO_PORT_PCSC:
508 port_name = "PCSC";
509 break;
510 case HSO_PORT_DIAG:
511 port_name = "Diagnostic";
512 break;
513 case HSO_PORT_DIAG2:
514 port_name = "Diagnostic2";
515 break;
516 case HSO_PORT_MODEM:
517 port_name = "Modem";
518 break;
519 case HSO_PORT_NETWORK:
520 port_name = "Network";
521 break;
522 default:
523 port_name = "Unknown";
524 break;
525 }
526
527 return sprintf(buf, "%s\n", port_name);
528}
529static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
530
8ef5ba63
DJB		 531static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
532{
533 int idx;
534
535 for (idx = 0; idx < serial->num_rx_urbs; idx++)
536 if (serial->rx_urb[idx] == urb)
537 return idx;
538 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
539 return -1;
540}
541
72dc1c09
GKH		 542/* converts mux value to a port spec value */
543static u32 hso_mux_to_port(int mux)
544{
545 u32 result;
546
547 switch (mux) {
548 case 0x1:
549 result = HSO_PORT_CONTROL;
550 break;
551 case 0x2:
552 result = HSO_PORT_APP;
553 break;
554 case 0x4:
555 result = HSO_PORT_PCSC;
556 break;
557 case 0x8:
558 result = HSO_PORT_GPS;
559 break;
560 case 0x10:
561 result = HSO_PORT_APP2;
562 break;
563 default:
564 result = HSO_PORT_NO_PORT;
565 }
566 return result;
567}
568
569/* converts port spec value to a mux value */
570static u32 hso_port_to_mux(int port)
571{
572 u32 result;
573
574 switch (port & HSO_PORT_MASK) {
575 case HSO_PORT_CONTROL:
576 result = 0x0;
577 break;
578 case HSO_PORT_APP:
579 result = 0x1;
580 break;
581 case HSO_PORT_PCSC:
582 result = 0x2;
583 break;
584 case HSO_PORT_GPS:
585 result = 0x3;
586 break;
587 case HSO_PORT_APP2:
588 result = 0x4;
589 break;
590 default:
591 result = 0x0;
592 }
593 return result;
594}
595
596static struct hso_serial *get_serial_by_shared_int_and_type(
597 struct hso_shared_int *shared_int,
598 int mux)
599{
600 int i, port;
601
602 port = hso_mux_to_port(mux);
603
604 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
605 if (serial_table[i]
606 && (dev2ser(serial_table[i])->shared_int == shared_int)
607 && ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
608 return dev2ser(serial_table[i]);
609 }
610 }
611
612 return NULL;
613}
614
615static struct hso_serial *get_serial_by_index(unsigned index)
616{
0235f641 617 struct hso_serial *serial = NULL;
72dc1c09
GKH		 618 unsigned long flags;
619
72dc1c09 620 spin_lock_irqsave(&serial_table_lock, flags);
0235f641
GKH		 621 if (serial_table[index])
622 serial = dev2ser(serial_table[index]);
72dc1c09
GKH		 623 spin_unlock_irqrestore(&serial_table_lock, flags);
624
625 return serial;
626}
627
628static int get_free_serial_index(void)
629{
630 int index;
631 unsigned long flags;
632
633 spin_lock_irqsave(&serial_table_lock, flags);
634 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
635 if (serial_table[index] == NULL) {
636 spin_unlock_irqrestore(&serial_table_lock, flags);
637 return index;
638 }
639 }
640 spin_unlock_irqrestore(&serial_table_lock, flags);
641
642 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
643 return -1;
644}
645
646static void set_serial_by_index(unsigned index, struct hso_serial *serial)
647{
648 unsigned long flags;
0235f641 649
72dc1c09
GKH		 650 spin_lock_irqsave(&serial_table_lock, flags);
651 if (serial)
652 serial_table[index] = serial->parent;
653 else
654 serial_table[index] = NULL;
655 spin_unlock_irqrestore(&serial_table_lock, flags);
656}
657
0235f641 658/* log a meaningful explanation of an USB status */
72dc1c09
GKH		 659static void log_usb_status(int status, const char *function)
660{
661 char *explanation;
662
663 switch (status) {
664 case -ENODEV:
665 explanation = "no device";
666 break;
667 case -ENOENT:
668 explanation = "endpoint not enabled";
669 break;
670 case -EPIPE:
671 explanation = "endpoint stalled";
672 break;
673 case -ENOSPC:
674 explanation = "not enough bandwidth";
675 break;
676 case -ESHUTDOWN:
677 explanation = "device disabled";
678 break;
679 case -EHOSTUNREACH:
680 explanation = "device suspended";
681 break;
682 case -EINVAL:
683 case -EAGAIN:
684 case -EFBIG:
685 case -EMSGSIZE:
686 explanation = "internal error";
687 break;
688 default:
689 explanation = "unknown status";
690 break;
691 }
692 D1("%s: received USB status - %s (%d)", function, explanation, status);
693}
694
695/* Network interface functions */
696
697/* called when net interface is brought up by ifconfig */
698static int hso_net_open(struct net_device *net)
699{
700 struct hso_net *odev = netdev_priv(net);
701 unsigned long flags = 0;
702
703 if (!odev) {
704 dev_err(&net->dev, "No net device !\n");
705 return -ENODEV;
706 }
707
708 odev->skb_tx_buf = NULL;
709
710 /* setup environment */
711 spin_lock_irqsave(&odev->net_lock, flags);
712 odev->rx_parse_state = WAIT_IP;
713 odev->rx_buf_size = 0;
714 odev->rx_buf_missing = sizeof(struct iphdr);
715 spin_unlock_irqrestore(&odev->net_lock, flags);
716
72dc1c09
GKH		 717 /* We are up and running. */
718 set_bit(HSO_NET_RUNNING, &odev->flags);
889bd9b6 719 hso_start_net_device(odev->parent);
72dc1c09
GKH		 720
721 /* Tell the kernel we are ready to start receiving from it */
722 netif_start_queue(net);
723
724 return 0;
725}
726
727/* called when interface is brought down by ifconfig */
728static int hso_net_close(struct net_device *net)
729{
730 struct hso_net *odev = netdev_priv(net);
731
732 /* we don't need the queue anymore */
733 netif_stop_queue(net);
734 /* no longer running */
735 clear_bit(HSO_NET_RUNNING, &odev->flags);
736
737 hso_stop_net_device(odev->parent);
738
739 /* done */
740 return 0;
741}
742
743/* USB tells is xmit done, we should start the netqueue again */
744static void write_bulk_callback(struct urb *urb)
745{
746 struct hso_net *odev = urb->context;
747 int status = urb->status;
748
749 /* Sanity check */
750 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
751 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
752 return;
753 }
754
755 /* Do we still have a valid kernel network device? */
756 if (!netif_device_present(odev->net)) {
757 dev_err(&urb->dev->dev, "%s: net device not present\n",
758 __func__);
759 return;
760 }
761
762 /* log status, but don't act on it, we don't need to resubmit anything
763 * anyhow */
764 if (status)
765 log_usb_status(status, __func__);
766
767 hso_put_activity(odev->parent);
768
769 /* Tell the network interface we are ready for another frame */
770 netif_wake_queue(odev->net);
771}
772
773/* called by kernel when we need to transmit a packet */
774static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net)
775{
776 struct hso_net *odev = netdev_priv(net);
777 int result;
778
779 /* Tell the kernel, "No more frames 'til we are done with this one." */
780 netif_stop_queue(net);
781 if (hso_get_activity(odev->parent) == -EAGAIN) {
782 odev->skb_tx_buf = skb;
783 return 0;
784 }
785
786 /* log if asked */
787 DUMP1(skb->data, skb->len);
788 /* Copy it from kernel memory to OUR memory */
789 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
790 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
791
792 /* Fill in the URB for shipping it out. */
793 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
794 odev->parent->usb,
795 usb_sndbulkpipe(odev->parent->usb,
796 odev->out_endp->
797 bEndpointAddress & 0x7F),
798 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
799 odev);
800
801 /* Deal with the Zero Length packet problem, I hope */
802 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
803
804 /* Send the URB on its merry way. */
805 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
806 if (result) {
807 dev_warn(&odev->parent->interface->dev,
808 "failed mux_bulk_tx_urb %d", result);
809 net->stats.tx_errors++;
810 netif_start_queue(net);
811 } else {
812 net->stats.tx_packets++;
813 net->stats.tx_bytes += skb->len;
814 /* And tell the kernel when the last transmit started. */
815 net->trans_start = jiffies;
816 }
817 dev_kfree_skb(skb);
818 /* we're done */
819 return result;
820}
821
822static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
823{
824 struct hso_net *odev = netdev_priv(net);
825
826 strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
827 strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
828 usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
829}
830
831static struct ethtool_ops ops = {
832 .get_drvinfo = hso_get_drvinfo,
833 .get_link = ethtool_op_get_link
834};
835
836/* called when a packet did not ack after watchdogtimeout */
837static void hso_net_tx_timeout(struct net_device *net)
838{
839 struct hso_net *odev = netdev_priv(net);
840
841 if (!odev)
842 return;
843
844 /* Tell syslog we are hosed. */
845 dev_warn(&net->dev, "Tx timed out.\n");
846
847 /* Tear the waiting frame off the list */
848 if (odev->mux_bulk_tx_urb
849 && (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
850 usb_unlink_urb(odev->mux_bulk_tx_urb);
851
852 /* Update statistics */
853 net->stats.tx_errors++;
854}
855
856/* make a real packet from the received USB buffer */
857static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
858 unsigned int count, unsigned char is_eop)
859{
860 unsigned short temp_bytes;
861 unsigned short buffer_offset = 0;
862 unsigned short frame_len;
863 unsigned char *tmp_rx_buf;
864
865 /* log if needed */
866 D1("Rx %d bytes", count);
867 DUMP(ip_pkt, min(128, (int)count));
868
869 while (count) {
870 switch (odev->rx_parse_state) {
871 case WAIT_IP:
872 /* waiting for IP header. */
873 /* wanted bytes - size of ip header */
874 temp_bytes =
875 (count <
876 odev->rx_buf_missing) ? count : odev->
877 rx_buf_missing;
878
879 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
880 odev->rx_buf_size, ip_pkt + buffer_offset,
881 temp_bytes);
882
883 odev->rx_buf_size += temp_bytes;
884 buffer_offset += temp_bytes;
885 odev->rx_buf_missing -= temp_bytes;
886 count -= temp_bytes;
887
888 if (!odev->rx_buf_missing) {
889 /* header is complete allocate an sk_buffer and
890 * continue to WAIT_DATA */
891 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
892
893 if ((frame_len > DEFAULT_MRU) ||
894 (frame_len < sizeof(struct iphdr))) {
895 dev_err(&odev->net->dev,
896 "Invalid frame (%d) length\n",
897 frame_len);
898 odev->rx_parse_state = WAIT_SYNC;
899 continue;
900 }
901 /* Allocate an sk_buff */
902 odev->skb_rx_buf = dev_alloc_skb(frame_len);
903 if (!odev->skb_rx_buf) {
904 /* We got no receive buffer. */
905 D1("could not allocate memory");
906 odev->rx_parse_state = WAIT_SYNC;
907 return;
908 }
909 /* Here's where it came from */
910 odev->skb_rx_buf->dev = odev->net;
911
912 /* Copy what we got so far. make room for iphdr
913 * after tail. */
914 tmp_rx_buf =
915 skb_put(odev->skb_rx_buf,
916 sizeof(struct iphdr));
917 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
918 sizeof(struct iphdr));
919
920 /* ETH_HLEN */
921 odev->rx_buf_size = sizeof(struct iphdr);
922
923 /* Filip actually use .tot_len */
924 odev->rx_buf_missing =
925 frame_len - sizeof(struct iphdr);
926 odev->rx_parse_state = WAIT_DATA;
927 }
928 break;
929
930 case WAIT_DATA:
931 temp_bytes = (count < odev->rx_buf_missing)
932 ? count : odev->rx_buf_missing;
933
934 /* Copy the rest of the bytes that are left in the
935 * buffer into the waiting sk_buf. */
936 /* Make room for temp_bytes after tail. */
937 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
938 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
939
940 odev->rx_buf_missing -= temp_bytes;
941 count -= temp_bytes;
942 buffer_offset += temp_bytes;
943 odev->rx_buf_size += temp_bytes;
944 if (!odev->rx_buf_missing) {
945 /* Packet is complete. Inject into stack. */
946 /* We have IP packet here */
09640e63 947 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
72dc1c09
GKH		 948 /* don't check it */
949 odev->skb_rx_buf->ip_summed =
950 CHECKSUM_UNNECESSARY;
951
952 skb_reset_mac_header(odev->skb_rx_buf);
953
954 /* Ship it off to the kernel */
955 netif_rx(odev->skb_rx_buf);
956 /* No longer our buffer. */
957 odev->skb_rx_buf = NULL;
958
959 /* update out statistics */
960 odev->net->stats.rx_packets++;
961
962 odev->net->stats.rx_bytes += odev->rx_buf_size;
963
964 odev->rx_buf_size = 0;
965 odev->rx_buf_missing = sizeof(struct iphdr);
966 odev->rx_parse_state = WAIT_IP;
967 }
968 break;
969
970 case WAIT_SYNC:
971 D1(" W_S");
972 count = 0;
973 break;
974 default:
975 D1(" ");
976 count--;
977 break;
978 }
979 }
980
981 /* Recovery mechanism for WAIT_SYNC state. */
982 if (is_eop) {
983 if (odev->rx_parse_state == WAIT_SYNC) {
984 odev->rx_parse_state = WAIT_IP;
985 odev->rx_buf_size = 0;
986 odev->rx_buf_missing = sizeof(struct iphdr);
987 }
988 }
989}
990
991/* Moving data from usb to kernel (in interrupt state) */
992static void read_bulk_callback(struct urb *urb)
993{
994 struct hso_net *odev = urb->context;
995 struct net_device *net;
996 int result;
997 int status = urb->status;
998
999 /* is al ok? (Filip: Who's Al ?) */
1000 if (status) {
1001 log_usb_status(status, __func__);
1002 return;
1003 }
1004
1005 /* Sanity check */
1006 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1007 D1("BULK IN callback but driver is not active!");
1008 return;
1009 }
1010 usb_mark_last_busy(urb->dev);
1011
1012 net = odev->net;
1013
1014 if (!netif_device_present(net)) {
1015 /* Somebody killed our network interface... */
1016 return;
1017 }
1018
1019 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1020 u32 rest;
1021 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1022 rest = urb->actual_length % odev->in_endp->wMaxPacketSize;
1023 if (((rest == 5) || (rest == 6))
1024 && !memcmp(((u8 *) urb->transfer_buffer) +
1025 urb->actual_length - 4, crc_check, 4)) {
1026 urb->actual_length -= 4;
1027 }
1028 }
1029
1030 /* do we even have a packet? */
1031 if (urb->actual_length) {
1032 /* Handle the IP stream, add header and push it onto network
1033 * stack if the packet is complete. */
1034 spin_lock(&odev->net_lock);
1035 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1036 (urb->transfer_buffer_length >
1037 urb->actual_length) ? 1 : 0);
1038 spin_unlock(&odev->net_lock);
1039 }
1040
1041 /* We are done with this URB, resubmit it. Prep the USB to wait for
1042 * another frame. Reuse same as received. */
1043 usb_fill_bulk_urb(urb,
1044 odev->parent->usb,
1045 usb_rcvbulkpipe(odev->parent->usb,
1046 odev->in_endp->
1047 bEndpointAddress & 0x7F),
1048 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1049 read_bulk_callback, odev);
1050
1051 /* Give this to the USB subsystem so it can tell us when more data
1052 * arrives. */
1053 result = usb_submit_urb(urb, GFP_ATOMIC);
1054 if (result)
1055 dev_warn(&odev->parent->interface->dev,
1056 "%s failed submit mux_bulk_rx_urb %d", __func__,
1057 result);
1058}
1059
1060/* Serial driver functions */
1061
ac9720c3 1062static void hso_init_termios(struct ktermios *termios)
72dc1c09 1063{
72dc1c09
GKH		 1064 /*
1065 * The default requirements for this device are:
1066 */
72dc1c09
GKH		 1067 termios->c_iflag &=
1068 ~(IGNBRK /* disable ignore break */
1069 | BRKINT /* disable break causes interrupt */
1070 | PARMRK /* disable mark parity errors */
1071 | ISTRIP /* disable clear high bit of input characters */
1072 | INLCR /* disable translate NL to CR */
1073 | IGNCR /* disable ignore CR */
1074 | ICRNL /* disable translate CR to NL */
1075 | IXON); /* disable enable XON/XOFF flow control */
1076
1077 /* disable postprocess output characters */
1078 termios->c_oflag &= ~OPOST;
1079
1080 termios->c_lflag &=
1081 ~(ECHO /* disable echo input characters */
1082 | ECHONL /* disable echo new line */
1083 | ICANON /* disable erase, kill, werase, and rprnt
1084 special characters */
1085 | ISIG /* disable interrupt, quit, and suspend special
1086 characters */
1087 | IEXTEN); /* disable non-POSIX special characters */
1088
1089 termios->c_cflag &=
1090 ~(CSIZE /* no size */
1091 | PARENB /* disable parity bit */
1092 | CBAUD /* clear current baud rate */
1093 | CBAUDEX); /* clear current buad rate */
1094
1095 termios->c_cflag |= CS8; /* character size 8 bits */
1096
1097 /* baud rate 115200 */
ac9720c3
AC		 1098 tty_termios_encode_baud_rate(termios, 115200, 115200);
1099}
1100
1101static void _hso_serial_set_termios(struct tty_struct *tty,
1102 struct ktermios *old)
1103{
1104 struct hso_serial *serial = get_serial_by_tty(tty);
1105 struct ktermios *termios;
1106
1107 if (!serial) {
1108 printk(KERN_ERR "%s: no tty structures", __func__);
1109 return;
1110 }
1111
1112 D4("port %d", serial->minor);
72dc1c09
GKH		 1113
1114 /*
ac9720c3 1115 * Fix up unsupported bits
72dc1c09 1116 */
ac9720c3
AC		 1117 termios = tty->termios;
1118 termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1119
1120 termios->c_cflag &=
1121 ~(CSIZE /* no size */
1122 | PARENB /* disable parity bit */
1123 | CBAUD /* clear current baud rate */
1124 | CBAUDEX); /* clear current buad rate */
1125
1126 termios->c_cflag |= CS8; /* character size 8 bits */
1127
1128 /* baud rate 115200 */
1129 tty_encode_baud_rate(tty, 115200, 115200);
72dc1c09
GKH		 1130}
1131
8ef5ba63
DJB		 1132static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1133{
1134 int result;
1135#ifdef CONFIG_HSO_AUTOPM
1136 usb_mark_last_busy(urb->dev);
1137#endif
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];
1183 if (serial->open_count > 0) {
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) {
1210 log_usb_status(status, __func__);
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? */
1219 if (serial->open_count == 0)
1220 return;
1221
1222 if (status == 0) {
1223 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1224 u32 rest;
1225 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1226 rest =
1227 urb->actual_length %
1228 serial->in_endp->wMaxPacketSize;
1229 if (((rest == 5) || (rest == 6))
1230 && !memcmp(((u8 *) urb->transfer_buffer) +
1231 urb->actual_length - 4, crc_check, 4)) {
1232 urb->actual_length -= 4;
1233 }
1234 }
1235 /* Valid data, handle RX data */
1236 spin_lock(&serial->serial_lock);
1237 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1238 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1239 spin_unlock(&serial->serial_lock);
1240 } else if (status == -ENOENT || status == -ECONNRESET) {
1241 /* Unlinked - check for throttled port. */
1242 D2("Port %d, successfully unlinked urb", serial->minor);
1243 spin_lock(&serial->serial_lock);
1244 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1245 hso_resubmit_rx_bulk_urb(serial, urb);
1246 spin_unlock(&serial->serial_lock);
1247 } else {
1248 D2("Port %d, status = %d for read urb", serial->minor, status);
1249 return;
1250 }
1251}
1252
1253/*
1254 * This needs to be a tasklet otherwise we will
1255 * end up recursively calling this function.
1256 */
0227abc9 1257static void hso_unthrottle_tasklet(struct hso_serial *serial)
8ef5ba63
DJB		 1258{
1259 unsigned long flags;
1260
1261 spin_lock_irqsave(&serial->serial_lock, flags);
1262 if ((serial->parent->port_spec & HSO_INTF_MUX))
1263 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1264 else
1265 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1266 spin_unlock_irqrestore(&serial->serial_lock, flags);
1267}
1268
1269static void hso_unthrottle(struct tty_struct *tty)
1270{
1271 struct hso_serial *serial = get_serial_by_tty(tty);
1272
1273 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1274}
1275
0227abc9 1276static void hso_unthrottle_workfunc(struct work_struct *work)
8ef5ba63
DJB		 1277{
1278 struct hso_serial *serial =
1279 container_of(work, struct hso_serial,
1280 retry_unthrottle_workqueue);
1281 hso_unthrottle_tasklet(serial);
1282}
1283
72dc1c09
GKH		 1284/* open the requested serial port */
1285static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1286{
1287 struct hso_serial *serial = get_serial_by_index(tty->index);
ab153d84 1288 int result;
72dc1c09
GKH		 1289
1290 /* sanity check */
1291 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
e136e303 1292 WARN_ON(1);
72dc1c09
GKH		 1293 tty->driver_data = NULL;
1294 D1("Failed to open port");
1295 return -ENODEV;
1296 }
1297
ab153d84 1298 mutex_lock(&serial->parent->mutex);
ab153d84
DM		 1299 result = usb_autopm_get_interface(serial->parent->interface);
1300 if (result < 0)
72dc1c09
GKH		 1301 goto err_out;
1302
1303 D1("Opening %d", serial->minor);
1304 kref_get(&serial->parent->ref);
1305
1306 /* setup */
e136e303 1307 spin_lock_irq(&serial->serial_lock);
72dc1c09 1308 tty->driver_data = serial;
fe41cbb1 1309 tty_kref_put(serial->tty);
e136e303
AC		 1310 serial->tty = tty_kref_get(tty);
1311 spin_unlock_irq(&serial->serial_lock);
72dc1c09 1312
2f9889a2
DM		 1313 /* check for port already opened, if not set the termios */
1314 serial->open_count++;
72dc1c09
GKH		 1315 if (serial->open_count == 1) {
1316 tty->low_latency = 1;
8ef5ba63 1317 serial->rx_state = RX_IDLE;
72dc1c09
GKH		 1318 /* Force default termio settings */
1319 _hso_serial_set_termios(tty, NULL);
8ef5ba63
DJB		 1320 tasklet_init(&serial->unthrottle_tasklet,
1321 (void (*)(unsigned long))hso_unthrottle_tasklet,
1322 (unsigned long)serial);
1323 INIT_WORK(&serial->retry_unthrottle_workqueue,
1324 hso_unthrottle_workfunc);
ab153d84
DM		 1325 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1326 if (result) {
72dc1c09
GKH		 1327 hso_stop_serial_device(serial->parent);
1328 serial->open_count--;
ab153d84 1329 kref_put(&serial->parent->ref, hso_serial_ref_free);
72dc1c09
GKH		 1330 }
1331 } else {
1332 D1("Port was already open");
1333 }
1334
1335 usb_autopm_put_interface(serial->parent->interface);
1336
1337 /* done */
ab153d84 1338 if (result)
72dc1c09
GKH		 1339 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1340err_out:
ab153d84
DM		 1341 mutex_unlock(&serial->parent->mutex);
1342 return result;
72dc1c09
GKH		 1343}
1344
1345/* close the requested serial port */
1346static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1347{
1348 struct hso_serial *serial = tty->driver_data;
1349 u8 usb_gone;
1350
1351 D1("Closing serial port");
1352
e136e303
AC		 1353 /* Open failed, no close cleanup required */
1354 if (serial == NULL)
1355 return;
1356
ab153d84 1357 mutex_lock(&serial->parent->mutex);
72dc1c09
GKH		 1358 usb_gone = serial->parent->usb_gone;
1359
1360 if (!usb_gone)
1361 usb_autopm_get_interface(serial->parent->interface);
1362
1363 /* reset the rts and dtr */
1364 /* do the actual close */
1365 serial->open_count--;
ab153d84 1366 kref_put(&serial->parent->ref, hso_serial_ref_free);
72dc1c09 1367 if (serial->open_count <= 0) {
72dc1c09 1368 serial->open_count = 0;
e136e303
AC		 1369 spin_lock_irq(&serial->serial_lock);
1370 if (serial->tty == tty) {
72dc1c09
GKH		 1371 serial->tty->driver_data = NULL;
1372 serial->tty = NULL;
e136e303 1373 tty_kref_put(tty);
72dc1c09 1374 }
e136e303 1375 spin_unlock_irq(&serial->serial_lock);
72dc1c09
GKH		 1376 if (!usb_gone)
1377 hso_stop_serial_device(serial->parent);
8ef5ba63
DJB		 1378 tasklet_kill(&serial->unthrottle_tasklet);
1379 cancel_work_sync(&serial->retry_unthrottle_workqueue);
72dc1c09 1380 }
8ef5ba63 1381
72dc1c09
GKH		 1382 if (!usb_gone)
1383 usb_autopm_put_interface(serial->parent->interface);
ab153d84
DM		 1384
1385 mutex_unlock(&serial->parent->mutex);
72dc1c09
GKH		 1386}
1387
1388/* close the requested serial port */
1389static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1390 int count)
1391{
1392 struct hso_serial *serial = get_serial_by_tty(tty);
1393 int space, tx_bytes;
1394 unsigned long flags;
1395
1396 /* sanity check */
1397 if (serial == NULL) {
1398 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1399 return -ENODEV;
1400 }
1401
1402 spin_lock_irqsave(&serial->serial_lock, flags);
1403
1404 space = serial->tx_data_length - serial->tx_buffer_count;
1405 tx_bytes = (count < space) ? count : space;
1406
1407 if (!tx_bytes)
1408 goto out;
1409
1410 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1411 serial->tx_buffer_count += tx_bytes;
1412
1413out:
1414 spin_unlock_irqrestore(&serial->serial_lock, flags);
1415
1416 hso_kick_transmit(serial);
1417 /* done */
1418 return tx_bytes;
1419}
1420
1421/* how much room is there for writing */
1422static int hso_serial_write_room(struct tty_struct *tty)
1423{
1424 struct hso_serial *serial = get_serial_by_tty(tty);
1425 int room;
1426 unsigned long flags;
1427
1428 spin_lock_irqsave(&serial->serial_lock, flags);
1429 room = serial->tx_data_length - serial->tx_buffer_count;
1430 spin_unlock_irqrestore(&serial->serial_lock, flags);
1431
1432 /* return free room */
1433 return room;
1434}
1435
1436/* setup the term */
1437static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1438{
1439 struct hso_serial *serial = get_serial_by_tty(tty);
1440 unsigned long flags;
1441
1442 if (old)
1443 D5("Termios called with: cflags new[%d] - old[%d]",
1444 tty->termios->c_cflag, old->c_cflag);
1445
1446 /* the actual setup */
1447 spin_lock_irqsave(&serial->serial_lock, flags);
1448 if (serial->open_count)
1449 _hso_serial_set_termios(tty, old);
1450 else
1451 tty->termios = old;
1452 spin_unlock_irqrestore(&serial->serial_lock, flags);
1453
1454 /* done */
1455 return;
1456}
1457
1458/* how many characters in the buffer */
1459static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1460{
1461 struct hso_serial *serial = get_serial_by_tty(tty);
1462 int chars;
1463 unsigned long flags;
1464
1465 /* sanity check */
1466 if (serial == NULL)
1467 return 0;
1468
1469 spin_lock_irqsave(&serial->serial_lock, flags);
1470 chars = serial->tx_buffer_count;
1471 spin_unlock_irqrestore(&serial->serial_lock, flags);
1472
1473 return chars;
1474}
0227abc9
HE		 1475static int tiocmget_submit_urb(struct hso_serial *serial,
1476 struct hso_tiocmget *tiocmget,
1477 struct usb_device *usb)
542f5482
DJB		 1478{
1479 int result;
1480
1481 if (serial->parent->usb_gone)
1482 return -ENODEV;
1483 usb_fill_int_urb(tiocmget->urb, usb,
1484 usb_rcvintpipe(usb,
1485 tiocmget->endp->
1486 bEndpointAddress & 0x7F),
1487 &tiocmget->serial_state_notification,
1488 sizeof(struct hso_serial_state_notification),
1489 tiocmget_intr_callback, serial,
1490 tiocmget->endp->bInterval);
1491 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1492 if (result) {
1493 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1494 result);
1495 }
1496 return result;
1497
1498}
1499
1500static void tiocmget_intr_callback(struct urb *urb)
1501{
1502 struct hso_serial *serial = urb->context;
1503 struct hso_tiocmget *tiocmget;
1504 int status = urb->status;
1505 u16 UART_state_bitmap, prev_UART_state_bitmap;
1506 struct uart_icount *icount;
1507 struct hso_serial_state_notification *serial_state_notification;
1508 struct usb_device *usb;
1509
1510 /* Sanity checks */
1511 if (!serial)
1512 return;
1513 if (status) {
1514 log_usb_status(status, __func__);
1515 return;
1516 }
1517 tiocmget = serial->tiocmget;
1518 if (!tiocmget)
1519 return;
1520 usb = serial->parent->usb;
1521 serial_state_notification = &tiocmget->serial_state_notification;
1522 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1523 serial_state_notification->bNotification != B_NOTIFICATION ||
1524 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1525 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1526 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1527 dev_warn(&usb->dev,
1528 "hso received invalid serial state notification\n");
1529 DUMP(serial_state_notification,
1530 sizeof(hso_serial_state_notifation))
1531 } else {
1532
1533 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1534 UART_state_bitmap);
1535 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1536 icount = &tiocmget->icount;
1537 spin_lock(&serial->serial_lock);
1538 if ((UART_state_bitmap & B_OVERRUN) !=
1539 (prev_UART_state_bitmap & B_OVERRUN))
1540 icount->parity++;
1541 if ((UART_state_bitmap & B_PARITY) !=
1542 (prev_UART_state_bitmap & B_PARITY))
1543 icount->parity++;
1544 if ((UART_state_bitmap & B_FRAMING) !=
1545 (prev_UART_state_bitmap & B_FRAMING))
1546 icount->frame++;
1547 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1548 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1549 icount->rng++;
1550 if ((UART_state_bitmap & B_BREAK) !=
1551 (prev_UART_state_bitmap & B_BREAK))
1552 icount->brk++;
1553 if ((UART_state_bitmap & B_TX_CARRIER) !=
1554 (prev_UART_state_bitmap & B_TX_CARRIER))
1555 icount->dsr++;
1556 if ((UART_state_bitmap & B_RX_CARRIER) !=
1557 (prev_UART_state_bitmap & B_RX_CARRIER))
1558 icount->dcd++;
1559 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1560 spin_unlock(&serial->serial_lock);
1561 tiocmget->intr_completed = 1;
1562 wake_up_interruptible(&tiocmget->waitq);
1563 }
1564 memset(serial_state_notification, 0,
1565 sizeof(struct hso_serial_state_notification));
1566 tiocmget_submit_urb(serial,
1567 tiocmget,
1568 serial->parent->usb);
1569}
1570
1571/*
1572 * next few functions largely stolen from drivers/serial/serial_core.c
1573 */
1574/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1575 * - mask passed in arg for lines of interest
1576 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1577 * Caller should use TIOCGICOUNT to see which one it was
1578 */
1579static int
1580hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1581{
1582 DECLARE_WAITQUEUE(wait, current);
1583 struct uart_icount cprev, cnow;
1584 struct hso_tiocmget *tiocmget;
1585 int ret;
1586
1587 tiocmget = serial->tiocmget;
1588 if (!tiocmget)
1589 return -ENOENT;
1590 /*
1591 * note the counters on entry
1592 */
1593 spin_lock_irq(&serial->serial_lock);
1594 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1595 spin_unlock_irq(&serial->serial_lock);
1596 add_wait_queue(&tiocmget->waitq, &wait);
1597 for (;;) {
1598 spin_lock_irq(&serial->serial_lock);
1599 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1600 spin_unlock_irq(&serial->serial_lock);
1601 set_current_state(TASK_INTERRUPTIBLE);
1602 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1603 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1604 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1605 ret = 0;
1606 break;
1607 }
1608 schedule();
1609 /* see if a signal did it */
1610 if (signal_pending(current)) {
1611 ret = -ERESTARTSYS;
1612 break;
1613 }
1614 cprev = cnow;
1615 }
1616 current->state = TASK_RUNNING;
1617 remove_wait_queue(&tiocmget->waitq, &wait);
1618
1619 return ret;
1620}
1621
1622/*
1623 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1624 * Return: write counters to the user passed counter struct
1625 * NB: both 1->0 and 0->1 transitions are counted except for
1626 * RI where only 0->1 is counted.
1627 */
1628static int hso_get_count(struct hso_serial *serial,
1629 struct serial_icounter_struct __user *icnt)
1630{
1631 struct serial_icounter_struct icount;
1632 struct uart_icount cnow;
1633 struct hso_tiocmget *tiocmget = serial->tiocmget;
1634
1635 if (!tiocmget)
1636 return -ENOENT;
1637 spin_lock_irq(&serial->serial_lock);
1638 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1639 spin_unlock_irq(&serial->serial_lock);
1640
1641 icount.cts = cnow.cts;
1642 icount.dsr = cnow.dsr;
1643 icount.rng = cnow.rng;
1644 icount.dcd = cnow.dcd;
1645 icount.rx = cnow.rx;
1646 icount.tx = cnow.tx;
1647 icount.frame = cnow.frame;
1648 icount.overrun = cnow.overrun;
1649 icount.parity = cnow.parity;
1650 icount.brk = cnow.brk;
1651 icount.buf_overrun = cnow.buf_overrun;
1652
1653 return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
1654}
1655
72dc1c09
GKH		 1656
1657static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1658{
542f5482 1659 int retval;
72dc1c09 1660 struct hso_serial *serial = get_serial_by_tty(tty);
542f5482
DJB		 1661 struct hso_tiocmget *tiocmget;
1662 u16 UART_state_bitmap;
72dc1c09
GKH		 1663
1664 /* sanity check */
1665 if (!serial) {
1666 D1("no tty structures");
1667 return -EINVAL;
1668 }
542f5482
DJB		 1669 spin_lock_irq(&serial->serial_lock);
1670 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
72dc1c09 1671 ((serial->dtr_state) ? TIOCM_DTR : 0);
542f5482
DJB		 1672 tiocmget = serial->tiocmget;
1673 if (tiocmget) {
1674
1675 UART_state_bitmap = le16_to_cpu(
1676 tiocmget->prev_UART_state_bitmap);
1677 if (UART_state_bitmap & B_RING_SIGNAL)
1678 retval |= TIOCM_RNG;
1679 if (UART_state_bitmap & B_RX_CARRIER)
1680 retval |= TIOCM_CD;
1681 if (UART_state_bitmap & B_TX_CARRIER)
1682 retval |= TIOCM_DSR;
1683 }
1684 spin_unlock_irq(&serial->serial_lock);
1685 return retval;
72dc1c09
GKH		 1686}
1687
1688static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1689 unsigned int set, unsigned int clear)
1690{
1691 int val = 0;
1692 unsigned long flags;
1693 int if_num;
1694 struct hso_serial *serial = get_serial_by_tty(tty);
1695
1696 /* sanity check */
1697 if (!serial) {
1698 D1("no tty structures");
1699 return -EINVAL;
1700 }
1701 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1702
1703 spin_lock_irqsave(&serial->serial_lock, flags);
1704 if (set & TIOCM_RTS)
1705 serial->rts_state = 1;
1706 if (set & TIOCM_DTR)
1707 serial->dtr_state = 1;
1708
1709 if (clear & TIOCM_RTS)
1710 serial->rts_state = 0;
1711 if (clear & TIOCM_DTR)
1712 serial->dtr_state = 0;
1713
1714 if (serial->dtr_state)
1715 val |= 0x01;
1716 if (serial->rts_state)
1717 val |= 0x02;
1718
1719 spin_unlock_irqrestore(&serial->serial_lock, flags);
1720
1721 return usb_control_msg(serial->parent->usb,
1722 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1723 0x21, val, if_num, NULL, 0,
1724 USB_CTRL_SET_TIMEOUT);
1725}
1726
542f5482
DJB		 1727static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1728 unsigned int cmd, unsigned long arg)
1729{
1730 struct hso_serial *serial = get_serial_by_tty(tty);
1731 void __user *uarg = (void __user *)arg;
1732 int ret = 0;
1733 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1734
1735 if (!serial)
1736 return -ENODEV;
1737 switch (cmd) {
1738 case TIOCMIWAIT:
1739 ret = hso_wait_modem_status(serial, arg);
1740 break;
1741
1742 case TIOCGICOUNT:
1743 ret = hso_get_count(serial, uarg);
1744 break;
1745 default:
1746 ret = -ENOIOCTLCMD;
1747 break;
1748 }
1749 return ret;
1750}
1751
1752
72dc1c09
GKH		 1753/* starts a transmit */
1754static void hso_kick_transmit(struct hso_serial *serial)
1755{
1756 u8 *temp;
1757 unsigned long flags;
1758 int res;
1759
1760 spin_lock_irqsave(&serial->serial_lock, flags);
1761 if (!serial->tx_buffer_count)
1762 goto out;
1763
1764 if (serial->tx_urb_used)
1765 goto out;
1766
1767 /* Wakeup USB interface if necessary */
1768 if (hso_get_activity(serial->parent) == -EAGAIN)
1769 goto out;
1770
1771 /* Switch pointers around to avoid memcpy */
1772 temp = serial->tx_buffer;
1773 serial->tx_buffer = serial->tx_data;
1774 serial->tx_data = temp;
1775 serial->tx_data_count = serial->tx_buffer_count;
1776 serial->tx_buffer_count = 0;
1777
1778 /* If temp is set, it means we switched buffers */
1779 if (temp && serial->write_data) {
1780 res = serial->write_data(serial);
1781 if (res >= 0)
1782 serial->tx_urb_used = 1;
1783 }
1784out:
1785 spin_unlock_irqrestore(&serial->serial_lock, flags);
1786}
1787
1788/* make a request (for reading and writing data to muxed serial port) */
1789static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1790 struct urb *ctrl_urb,
1791 struct usb_ctrlrequest *ctrl_req,
1792 u8 *ctrl_urb_data, u32 size)
1793{
1794 int result;
1795 int pipe;
1796
1797 /* Sanity check */
1798 if (!serial || !ctrl_urb || !ctrl_req) {
1799 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1800 return -EINVAL;
1801 }
1802
1803 /* initialize */
1804 ctrl_req->wValue = 0;
b74f62c1
DJB		 1805 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1806 ctrl_req->wLength = cpu_to_le16(size);
72dc1c09
GKH		 1807
1808 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1809 /* Reading command */
1810 ctrl_req->bRequestType = USB_DIR_IN |
1811 USB_TYPE_OPTION_VENDOR |
1812 USB_RECIP_INTERFACE;
1813 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1814 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1815 } else {
1816 /* Writing command */
1817 ctrl_req->bRequestType = USB_DIR_OUT |
1818 USB_TYPE_OPTION_VENDOR |
1819 USB_RECIP_INTERFACE;
1820 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1821 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1822 }
1823 /* syslog */
1824 D2("%s command (%02x) len: %d, port: %d",
1825 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1826 ctrl_req->bRequestType, ctrl_req->wLength, port);
1827
1828 /* Load ctrl urb */
1829 ctrl_urb->transfer_flags = 0;
1830 usb_fill_control_urb(ctrl_urb,
1831 serial->parent->usb,
1832 pipe,
1833 (u8 *) ctrl_req,
1834 ctrl_urb_data, size, ctrl_callback, serial);
1835 /* Send it on merry way */
1836 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1837 if (result) {
1838 dev_err(&ctrl_urb->dev->dev,
1839 "%s failed submit ctrl_urb %d type %d", __func__,
1840 result, type);
1841 return result;
1842 }
1843
1844 /* done */
1845 return size;
1846}
1847
1848/* called by intr_callback when read occurs */
1849static int hso_mux_serial_read(struct hso_serial *serial)
1850{
1851 if (!serial)
1852 return -EINVAL;
1853
1854 /* clean data */
1855 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1856 /* make the request */
1857
1858 if (serial->num_rx_urbs != 1) {
1859 dev_err(&serial->parent->interface->dev,
1860 "ERROR: mux'd reads with multiple buffers "
1861 "not possible\n");
1862 return 0;
1863 }
1864 return mux_device_request(serial,
1865 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1866 serial->parent->port_spec & HSO_PORT_MASK,
1867 serial->rx_urb[0],
1868 &serial->ctrl_req_rx,
1869 serial->rx_data[0], serial->rx_data_length);
1870}
1871
1872/* used for muxed serial port callback (muxed serial read) */
1873static void intr_callback(struct urb *urb)
1874{
1875 struct hso_shared_int *shared_int = urb->context;
1876 struct hso_serial *serial;
1877 unsigned char *port_req;
1878 int status = urb->status;
1879 int i;
1880
1881 usb_mark_last_busy(urb->dev);
1882
1883 /* sanity check */
1884 if (!shared_int)
1885 return;
1886
1887 /* status check */
1888 if (status) {
1889 log_usb_status(status, __func__);
1890 return;
1891 }
1892 D4("\n--- Got intr callback 0x%02X ---", status);
1893
1894 /* what request? */
1895 port_req = urb->transfer_buffer;
1896 D4(" port_req = 0x%.2X\n", *port_req);
1897 /* loop over all muxed ports to find the one sending this */
1898 for (i = 0; i < 8; i++) {
1899 /* max 8 channels on MUX */
1900 if (*port_req & (1 << i)) {
1901 serial = get_serial_by_shared_int_and_type(shared_int,
1902 (1 << i));
1903 if (serial != NULL) {
1904 D1("Pending read interrupt on port %d\n", i);
8ef5ba63
DJB		 1905 spin_lock(&serial->serial_lock);
1906 if (serial->rx_state == RX_IDLE) {
72dc1c09
GKH		 1907 /* Setup and send a ctrl req read on
1908 * port i */
8ef5ba63
DJB		 1909 if (!serial->rx_urb_filled[0]) {
1910 serial->rx_state = RX_SENT;
1911 hso_mux_serial_read(serial);
1912 } else
1913 serial->rx_state = RX_PENDING;
1914
72dc1c09
GKH		 1915 } else {
1916 D1("Already pending a read on "
1917 "port %d\n", i);
1918 }
8ef5ba63 1919 spin_unlock(&serial->serial_lock);
72dc1c09
GKH		 1920 }
1921 }
1922 }
1923 /* Resubmit interrupt urb */
1924 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1925}
1926
1927/* called for writing to muxed serial port */
1928static int hso_mux_serial_write_data(struct hso_serial *serial)
1929{
1930 if (NULL == serial)
1931 return -EINVAL;
1932
1933 return mux_device_request(serial,
1934 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1935 serial->parent->port_spec & HSO_PORT_MASK,
1936 serial->tx_urb,
1937 &serial->ctrl_req_tx,
1938 serial->tx_data, serial->tx_data_count);
1939}
1940
1941/* write callback for Diag and CS port */
1942static void hso_std_serial_write_bulk_callback(struct urb *urb)
1943{
1944 struct hso_serial *serial = urb->context;
1945 int status = urb->status;
e136e303 1946 struct tty_struct *tty;
72dc1c09
GKH		 1947
1948 /* sanity check */
1949 if (!serial) {
1950 D1("serial == NULL");
1951 return;
1952 }
1953
1954 spin_lock(&serial->serial_lock);
1955 serial->tx_urb_used = 0;
e136e303 1956 tty = tty_kref_get(serial->tty);
72dc1c09
GKH		 1957 spin_unlock(&serial->serial_lock);
1958 if (status) {
1959 log_usb_status(status, __func__);
e136e303 1960 tty_kref_put(tty);
72dc1c09
GKH		 1961 return;
1962 }
1963 hso_put_activity(serial->parent);
e136e303
AC		 1964 if (tty) {
1965 tty_wakeup(tty);
1966 tty_kref_put(tty);
1967 }
72dc1c09
GKH		 1968 hso_kick_transmit(serial);
1969
1970 D1(" ");
1971 return;
1972}
1973
1974/* called for writing diag or CS serial port */
1975static int hso_std_serial_write_data(struct hso_serial *serial)
1976{
1977 int count = serial->tx_data_count;
1978 int result;
1979
1980 usb_fill_bulk_urb(serial->tx_urb,
1981 serial->parent->usb,
1982 usb_sndbulkpipe(serial->parent->usb,
1983 serial->out_endp->
1984 bEndpointAddress & 0x7F),
1985 serial->tx_data, serial->tx_data_count,
1986 hso_std_serial_write_bulk_callback, serial);
1987
1988 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1989 if (result) {
1990 dev_warn(&serial->parent->usb->dev,
1991 "Failed to submit urb - res %d\n", result);
1992 return result;
1993 }
1994
1995 return count;
1996}
1997
1998/* callback after read or write on muxed serial port */
1999static void ctrl_callback(struct urb *urb)
2000{
2001 struct hso_serial *serial = urb->context;
2002 struct usb_ctrlrequest *req;
2003 int status = urb->status;
e136e303 2004 struct tty_struct *tty;
72dc1c09
GKH		 2005
2006 /* sanity check */
2007 if (!serial)
2008 return;
2009
2010 spin_lock(&serial->serial_lock);
2011 serial->tx_urb_used = 0;
e136e303 2012 tty = tty_kref_get(serial->tty);
72dc1c09
GKH		 2013 spin_unlock(&serial->serial_lock);
2014 if (status) {
2015 log_usb_status(status, __func__);
e136e303 2016 tty_kref_put(tty);
72dc1c09
GKH		 2017 return;
2018 }
2019
2020 /* what request? */
2021 req = (struct usb_ctrlrequest *)(urb->setup_packet);
2022 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2023 D4("Actual length of urb = %d\n", urb->actual_length);
2024 DUMP1(urb->transfer_buffer, urb->actual_length);
2025
2026 if (req->bRequestType ==
2027 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2028 /* response to a read command */
8ef5ba63
DJB		 2029 serial->rx_urb_filled[0] = 1;
2030 spin_lock(&serial->serial_lock);
2031 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2032 spin_unlock(&serial->serial_lock);
72dc1c09
GKH		 2033 } else {
2034 hso_put_activity(serial->parent);
e136e303
AC		 2035 if (tty)
2036 tty_wakeup(tty);
72dc1c09
GKH		 2037 /* response to a write command */
2038 hso_kick_transmit(serial);
2039 }
e136e303 2040 tty_kref_put(tty);
72dc1c09
GKH		 2041}
2042
2043/* handle RX data for serial port */
8ef5ba63 2044static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
72dc1c09 2045{
e136e303 2046 struct tty_struct *tty;
8ef5ba63
DJB		 2047 int write_length_remaining = 0;
2048 int curr_write_len;
e136e303 2049
72dc1c09
GKH		 2050 /* Sanity check */
2051 if (urb == NULL || serial == NULL) {
2052 D1("serial = NULL");
8ef5ba63 2053 return -2;
72dc1c09
GKH		 2054 }
2055
d45eb81c 2056 /* All callers to put_rxbuf_data hold serial_lock */
e136e303 2057 tty = tty_kref_get(serial->tty);
e136e303 2058
72dc1c09 2059 /* Push data to tty */
8ef5ba63
DJB		 2060 if (tty) {
2061 write_length_remaining = urb->actual_length -
2062 serial->curr_rx_urb_offset;
72dc1c09 2063 D1("data to push to tty");
8ef5ba63 2064 while (write_length_remaining) {
5839b414
DJB		 2065 if (test_bit(TTY_THROTTLED, &tty->flags)) {
2066 tty_kref_put(tty);
8ef5ba63 2067 return -1;
5839b414 2068 }
8ef5ba63
DJB		 2069 curr_write_len = tty_insert_flip_string
2070 (tty, urb->transfer_buffer +
2071 serial->curr_rx_urb_offset,
2072 write_length_remaining);
2073 serial->curr_rx_urb_offset += curr_write_len;
2074 write_length_remaining -= curr_write_len;
2075 tty_flip_buffer_push(tty);
72dc1c09 2076 }
72dc1c09 2077 }
8ef5ba63
DJB		 2078 if (write_length_remaining == 0) {
2079 serial->curr_rx_urb_offset = 0;
2080 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
72dc1c09 2081 }
e136e303 2082 tty_kref_put(tty);
8ef5ba63 2083 return write_length_remaining;
72dc1c09
GKH		 2084}
2085
8ef5ba63 2086
72dc1c09
GKH		 2087/* Base driver functions */
2088
2089static void hso_log_port(struct hso_device *hso_dev)
2090{
2091 char *port_type;
2092 char port_dev[20];
2093
2094 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2095 case HSO_PORT_CONTROL:
2096 port_type = "Control";
2097 break;
2098 case HSO_PORT_APP:
2099 port_type = "Application";
2100 break;
2101 case HSO_PORT_GPS:
2102 port_type = "GPS";
2103 break;
2104 case HSO_PORT_GPS_CONTROL:
2105 port_type = "GPS control";
2106 break;
2107 case HSO_PORT_APP2:
2108 port_type = "Application2";
2109 break;
2110 case HSO_PORT_PCSC:
2111 port_type = "PCSC";
2112 break;
2113 case HSO_PORT_DIAG:
2114 port_type = "Diagnostic";
2115 break;
2116 case HSO_PORT_DIAG2:
2117 port_type = "Diagnostic2";
2118 break;
2119 case HSO_PORT_MODEM:
2120 port_type = "Modem";
2121 break;
2122 case HSO_PORT_NETWORK:
2123 port_type = "Network";
2124 break;
2125 default:
2126 port_type = "Unknown";
2127 break;
2128 }
2129 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2130 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2131 } else
2132 sprintf(port_dev, "/dev/%s%d", tty_filename,
2133 dev2ser(hso_dev)->minor);
2134
2135 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2136 port_type, port_dev);
2137}
2138
2139static int hso_start_net_device(struct hso_device *hso_dev)
2140{
2141 int i, result = 0;
2142 struct hso_net *hso_net = dev2net(hso_dev);
2143
2144 if (!hso_net)
2145 return -ENODEV;
2146
2147 /* send URBs for all read buffers */
2148 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2149
2150 /* Prep a receive URB */
2151 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2152 hso_dev->usb,
2153 usb_rcvbulkpipe(hso_dev->usb,
2154 hso_net->in_endp->
2155 bEndpointAddress & 0x7F),
2156 hso_net->mux_bulk_rx_buf_pool[i],
2157 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2158 hso_net);
2159
2160 /* Put it out there so the device can send us stuff */
2161 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2162 GFP_NOIO);
2163 if (result)
2164 dev_warn(&hso_dev->usb->dev,
2165 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2166 i, result);
2167 }
2168
2169 return result;
2170}
2171
2172static int hso_stop_net_device(struct hso_device *hso_dev)
2173{
2174 int i;
2175 struct hso_net *hso_net = dev2net(hso_dev);
2176
2177 if (!hso_net)
2178 return -ENODEV;
2179
2180 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2181 if (hso_net->mux_bulk_rx_urb_pool[i])
2182 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2183
2184 }
2185 if (hso_net->mux_bulk_tx_urb)
2186 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2187
2188 return 0;
2189}
2190
2191static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2192{
2193 int i, result = 0;
2194 struct hso_serial *serial = dev2ser(hso_dev);
2195
2196 if (!serial)
2197 return -ENODEV;
2198
2199 /* If it is not the MUX port fill in and submit a bulk urb (already
2200 * allocated in hso_serial_start) */
2201 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2202 for (i = 0; i < serial->num_rx_urbs; i++) {
2203 usb_fill_bulk_urb(serial->rx_urb[i],
2204 serial->parent->usb,
2205 usb_rcvbulkpipe(serial->parent->usb,
2206 serial->in_endp->
2207 bEndpointAddress &
2208 0x7F),
2209 serial->rx_data[i],
2210 serial->rx_data_length,
2211 hso_std_serial_read_bulk_callback,
2212 serial);
2213 result = usb_submit_urb(serial->rx_urb[i], flags);
2214 if (result) {
2215 dev_warn(&serial->parent->usb->dev,
2216 "Failed to submit urb - res %d\n",
2217 result);
2218 break;
2219 }
2220 }
2221 } else {
2222 mutex_lock(&serial->shared_int->shared_int_lock);
2223 if (!serial->shared_int->use_count) {
2224 result =
2225 hso_mux_submit_intr_urb(serial->shared_int,
2226 hso_dev->usb, flags);
2227 }
2228 serial->shared_int->use_count++;
2229 mutex_unlock(&serial->shared_int->shared_int_lock);
2230 }
542f5482
DJB		 2231 if (serial->tiocmget)
2232 tiocmget_submit_urb(serial,
2233 serial->tiocmget,
2234 serial->parent->usb);
72dc1c09
GKH		 2235 return result;
2236}
2237
2238static int hso_stop_serial_device(struct hso_device *hso_dev)
2239{
2240 int i;
2241 struct hso_serial *serial = dev2ser(hso_dev);
542f5482 2242 struct hso_tiocmget *tiocmget;
72dc1c09
GKH		 2243
2244 if (!serial)
2245 return -ENODEV;
2246
2247 for (i = 0; i < serial->num_rx_urbs; i++) {
8ef5ba63 2248 if (serial->rx_urb[i]) {
72dc1c09 2249 usb_kill_urb(serial->rx_urb[i]);
8ef5ba63
DJB		 2250 serial->rx_urb_filled[i] = 0;
2251 }
72dc1c09 2252 }
8ef5ba63
DJB		 2253 serial->curr_rx_urb_idx = 0;
2254 serial->curr_rx_urb_offset = 0;
72dc1c09
GKH		 2255
2256 if (serial->tx_urb)
2257 usb_kill_urb(serial->tx_urb);
2258
2259 if (serial->shared_int) {
2260 mutex_lock(&serial->shared_int->shared_int_lock);
2261 if (serial->shared_int->use_count &&
2262 (--serial->shared_int->use_count == 0)) {
2263 struct urb *urb;
2264
2265 urb = serial->shared_int->shared_intr_urb;
2266 if (urb)
2267 usb_kill_urb(urb);
2268 }
2269 mutex_unlock(&serial->shared_int->shared_int_lock);
2270 }
542f5482
DJB		 2271 tiocmget = serial->tiocmget;
2272 if (tiocmget) {
2273 wake_up_interruptible(&tiocmget->waitq);
2274 usb_kill_urb(tiocmget->urb);
2275 }
72dc1c09
GKH		 2276
2277 return 0;
2278}
2279
2280static void hso_serial_common_free(struct hso_serial *serial)
2281{
2282 int i;
2283
2284 if (serial->parent->dev)
2285 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2286
2287 tty_unregister_device(tty_drv, serial->minor);
2288
2289 for (i = 0; i < serial->num_rx_urbs; i++) {
2290 /* unlink and free RX URB */
2291 usb_free_urb(serial->rx_urb[i]);
2292 /* free the RX buffer */
2293 kfree(serial->rx_data[i]);
2294 }
2295
2296 /* unlink and free TX URB */
2297 usb_free_urb(serial->tx_urb);
2298 kfree(serial->tx_data);
2299}
2300
2301static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2302 int rx_size, int tx_size)
2303{
2304 struct device *dev;
2305 int minor;
2306 int i;
2307
2308 minor = get_free_serial_index();
2309 if (minor < 0)
2310 goto exit;
2311
2312 /* register our minor number */
2313 serial->parent->dev = tty_register_device(tty_drv, minor,
2314 &serial->parent->interface->dev);
2315 dev = serial->parent->dev;
2316 dev->driver_data = serial->parent;
2317 i = device_create_file(dev, &dev_attr_hsotype);
2318
2319 /* fill in specific data for later use */
2320 serial->minor = minor;
2321 serial->magic = HSO_SERIAL_MAGIC;
2322 spin_lock_init(&serial->serial_lock);
2323 serial->num_rx_urbs = num_urbs;
2324
2325 /* RX, allocate urb and initialize */
2326
2327 /* prepare our RX buffer */
2328 serial->rx_data_length = rx_size;
2329 for (i = 0; i < serial->num_rx_urbs; i++) {
2330 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2331 if (!serial->rx_urb[i]) {
2332 dev_err(dev, "Could not allocate urb?\n");
2333 goto exit;
2334 }
2335 serial->rx_urb[i]->transfer_buffer = NULL;
2336 serial->rx_urb[i]->transfer_buffer_length = 0;
2337 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2338 GFP_KERNEL);
2339 if (!serial->rx_data[i]) {
2340 dev_err(dev, "%s - Out of memory\n", __func__);
2341 goto exit;
2342 }
2343 }
2344
2345 /* TX, allocate urb and initialize */
2346 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2347 if (!serial->tx_urb) {
2348 dev_err(dev, "Could not allocate urb?\n");
2349 goto exit;
2350 }
2351 serial->tx_urb->transfer_buffer = NULL;
2352 serial->tx_urb->transfer_buffer_length = 0;
2353 /* prepare our TX buffer */
2354 serial->tx_data_count = 0;
2355 serial->tx_buffer_count = 0;
2356 serial->tx_data_length = tx_size;
2357 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2358 if (!serial->tx_data) {
2359 dev_err(dev, "%s - Out of memory", __func__);
2360 goto exit;
2361 }
2362 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2363 if (!serial->tx_buffer) {
2364 dev_err(dev, "%s - Out of memory", __func__);
2365 goto exit;
2366 }
2367
2368 return 0;
2369exit:
2370 hso_serial_common_free(serial);
2371 return -1;
2372}
2373
72dc1c09
GKH		 2374/* Creates a general hso device */
2375static struct hso_device *hso_create_device(struct usb_interface *intf,
2376 int port_spec)
2377{
2378 struct hso_device *hso_dev;
2379
2380 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2381 if (!hso_dev)
2382 return NULL;
2383
2384 hso_dev->port_spec = port_spec;
2385 hso_dev->usb = interface_to_usbdev(intf);
2386 hso_dev->interface = intf;
2387 kref_init(&hso_dev->ref);
ab153d84
DM		 2388 mutex_init(&hso_dev->mutex);
2389
72dc1c09
GKH		 2390 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2391 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2392
2393 return hso_dev;
2394}
2395
2396/* Removes a network device in the network device table */
2397static int remove_net_device(struct hso_device *hso_dev)
2398{
2399 int i;
2400
2401 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2402 if (network_table[i] == hso_dev) {
2403 network_table[i] = NULL;
2404 break;
2405 }
2406 }
2407 if (i == HSO_MAX_NET_DEVICES)
2408 return -1;
2409 return 0;
2410}
2411
2412/* Frees our network device */
2413static void hso_free_net_device(struct hso_device *hso_dev)
2414{
2415 int i;
2416 struct hso_net *hso_net = dev2net(hso_dev);
2417
2418 if (!hso_net)
2419 return;
2420
3b7d2b31
JD		 2421 remove_net_device(hso_net->parent);
2422
2423 if (hso_net->net) {
2424 unregister_netdev(hso_net->net);
2425 free_netdev(hso_net->net);
2426 }
2427
72dc1c09
GKH		 2428 /* start freeing */
2429 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2430 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2431 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
3b7d2b31 2432 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
72dc1c09
GKH		 2433 }
2434 usb_free_urb(hso_net->mux_bulk_tx_urb);
2435 kfree(hso_net->mux_bulk_tx_buf);
3b7d2b31 2436 hso_net->mux_bulk_tx_buf = NULL;
ab153d84 2437
e44578ea 2438 kfree(hso_dev);
72dc1c09
GKH		 2439}
2440
c266cb4e
SH		 2441static const struct net_device_ops hso_netdev_ops = {
2442 .ndo_open = hso_net_open,
2443 .ndo_stop = hso_net_close,
2444 .ndo_start_xmit = hso_net_start_xmit,
2445 .ndo_tx_timeout = hso_net_tx_timeout,
2446};
2447
72dc1c09
GKH		 2448/* initialize the network interface */
2449static void hso_net_init(struct net_device *net)
2450{
2451 struct hso_net *hso_net = netdev_priv(net);
2452
2453 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2454
2455 /* fill in the other fields */
c266cb4e 2456 net->netdev_ops = &hso_netdev_ops;
72dc1c09
GKH		 2457 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2458 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2459 net->type = ARPHRD_NONE;
2460 net->mtu = DEFAULT_MTU - 14;
2461 net->tx_queue_len = 10;
2462 SET_ETHTOOL_OPS(net, &ops);
2463
2464 /* and initialize the semaphore */
2465 spin_lock_init(&hso_net->net_lock);
2466}
2467
2468/* Adds a network device in the network device table */
2469static int add_net_device(struct hso_device *hso_dev)
2470{
2471 int i;
2472
2473 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2474 if (network_table[i] == NULL) {
2475 network_table[i] = hso_dev;
2476 break;
2477 }
2478 }
2479 if (i == HSO_MAX_NET_DEVICES)
2480 return -1;
2481 return 0;
2482}
2483
2484static int hso_radio_toggle(void *data, enum rfkill_state state)
2485{
2486 struct hso_device *hso_dev = data;
c1c6b14b 2487 int enabled = (state == RFKILL_STATE_UNBLOCKED);
72dc1c09
GKH		 2488 int rv;
2489
ab153d84 2490 mutex_lock(&hso_dev->mutex);
72dc1c09
GKH		 2491 if (hso_dev->usb_gone)
2492 rv = 0;
2493 else
2494 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2495 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2496 USB_CTRL_SET_TIMEOUT);
ab153d84 2497 mutex_unlock(&hso_dev->mutex);
72dc1c09
GKH		 2498 return rv;
2499}
2500
2501/* Creates and sets up everything for rfkill */
2502static void hso_create_rfkill(struct hso_device *hso_dev,
2503 struct usb_interface *interface)
2504{
2505 struct hso_net *hso_net = dev2net(hso_dev);
939a9516 2506 struct device *dev = &hso_net->net->dev;
72dc1c09
GKH		 2507 char *rfkn;
2508
2509 hso_net->rfkill = rfkill_allocate(&interface_to_usbdev(interface)->dev,
db053c6b 2510 RFKILL_TYPE_WWAN);
72dc1c09 2511 if (!hso_net->rfkill) {
939a9516 2512 dev_err(dev, "%s - Out of memory\n", __func__);
72dc1c09
GKH		 2513 return;
2514 }
2515 rfkn = kzalloc(20, GFP_KERNEL);
2516 if (!rfkn) {
2517 rfkill_free(hso_net->rfkill);
939a9516
JM		 2518 hso_net->rfkill = NULL;
2519 dev_err(dev, "%s - Out of memory\n", __func__);
72dc1c09
GKH		 2520 return;
2521 }
2522 snprintf(rfkn, 20, "hso-%d",
2523 interface->altsetting->desc.bInterfaceNumber);
2524 hso_net->rfkill->name = rfkn;
c1c6b14b 2525 hso_net->rfkill->state = RFKILL_STATE_UNBLOCKED;
72dc1c09
GKH		 2526 hso_net->rfkill->data = hso_dev;
2527 hso_net->rfkill->toggle_radio = hso_radio_toggle;
2528 if (rfkill_register(hso_net->rfkill) < 0) {
2529 kfree(rfkn);
2530 hso_net->rfkill->name = NULL;
2531 rfkill_free(hso_net->rfkill);
939a9516
JM		 2532 hso_net->rfkill = NULL;
2533 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
72dc1c09
GKH		 2534 return;
2535 }
2536}
2537
2538/* Creates our network device */
0de8ca59
JD		 2539static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2540 int port_spec)
72dc1c09
GKH		 2541{
2542 int result, i;
2543 struct net_device *net;
2544 struct hso_net *hso_net;
2545 struct hso_device *hso_dev;
2546
0de8ca59 2547 hso_dev = hso_create_device(interface, port_spec);
72dc1c09
GKH		 2548 if (!hso_dev)
2549 return NULL;
2550
2551 /* allocate our network device, then we can put in our private data */
2552 /* call hso_net_init to do the basic initialization */
2553 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2554 if (!net) {
2555 dev_err(&interface->dev, "Unable to create ethernet device\n");
2556 goto exit;
2557 }
2558
2559 hso_net = netdev_priv(net);
2560
2561 hso_dev->port_data.dev_net = hso_net;
2562 hso_net->net = net;
2563 hso_net->parent = hso_dev;
2564
2565 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2566 USB_DIR_IN);
2567 if (!hso_net->in_endp) {
2568 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2569 goto exit;
2570 }
2571 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2572 USB_DIR_OUT);
2573 if (!hso_net->out_endp) {
2574 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2575 goto exit;
2576 }
2577 SET_NETDEV_DEV(net, &interface->dev);
2578
2579 /* registering our net device */
2580 result = register_netdev(net);
2581 if (result) {
2582 dev_err(&interface->dev, "Failed to register device\n");
2583 goto exit;
2584 }
2585
2586 /* start allocating */
2587 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2588 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2589 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2590 dev_err(&interface->dev, "Could not allocate rx urb\n");
2591 goto exit;
2592 }
2593 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2594 GFP_KERNEL);
2595 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2596 dev_err(&interface->dev, "Could not allocate rx buf\n");
2597 goto exit;
2598 }
2599 }
2600 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2601 if (!hso_net->mux_bulk_tx_urb) {
2602 dev_err(&interface->dev, "Could not allocate tx urb\n");
2603 goto exit;
2604 }
2605 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2606 if (!hso_net->mux_bulk_tx_buf) {
2607 dev_err(&interface->dev, "Could not allocate tx buf\n");
2608 goto exit;
2609 }
2610
2611 add_net_device(hso_dev);
2612
2613 hso_log_port(hso_dev);
2614
2615 hso_create_rfkill(hso_dev, interface);
2616
2617 return hso_dev;
2618exit:
2619 hso_free_net_device(hso_dev);
2620 return NULL;
2621}
2622
542f5482
DJB		 2623static void hso_free_tiomget(struct hso_serial *serial)
2624{
2625 struct hso_tiocmget *tiocmget = serial->tiocmget;
2626 if (tiocmget) {
542f5482
DJB		 2627 if (tiocmget->urb) {
2628 usb_free_urb(tiocmget->urb);
2629 tiocmget->urb = NULL;
2630 }
2631 serial->tiocmget = NULL;
3b7d2b31 2632 kfree(tiocmget);
542f5482
DJB		 2633
2634 }
2635}
2636
72dc1c09
GKH		 2637/* Frees an AT channel ( goes for both mux and non-mux ) */
2638static void hso_free_serial_device(struct hso_device *hso_dev)
2639{
2640 struct hso_serial *serial = dev2ser(hso_dev);
2641
2642 if (!serial)
2643 return;
2644 set_serial_by_index(serial->minor, NULL);
2645
2646 hso_serial_common_free(serial);
2647
2648 if (serial->shared_int) {
2649 mutex_lock(&serial->shared_int->shared_int_lock);
2650 if (--serial->shared_int->ref_count == 0)
2651 hso_free_shared_int(serial->shared_int);
2652 else
2653 mutex_unlock(&serial->shared_int->shared_int_lock);
2654 }
542f5482 2655 hso_free_tiomget(serial);
72dc1c09 2656 kfree(serial);
e44578ea 2657 kfree(hso_dev);
72dc1c09
GKH		 2658}
2659
2660/* Creates a bulk AT channel */
2661static struct hso_device *hso_create_bulk_serial_device(
2662 struct usb_interface *interface, int port)
2663{
2664 struct hso_device *hso_dev;
2665 struct hso_serial *serial;
2666 int num_urbs;
542f5482 2667 struct hso_tiocmget *tiocmget;
72dc1c09
GKH		 2668
2669 hso_dev = hso_create_device(interface, port);
2670 if (!hso_dev)
2671 return NULL;
2672
2673 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2674 if (!serial)
2675 goto exit;
2676
2677 serial->parent = hso_dev;
2678 hso_dev->port_data.dev_serial = serial;
2679
58eb17f1 2680 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
72dc1c09 2681 num_urbs = 2;
542f5482
DJB		 2682 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2683 GFP_KERNEL);
2684 /* it isn't going to break our heart if serial->tiocmget
2685 * allocation fails don't bother checking this.
2686 */
2687 if (serial->tiocmget) {
2688 tiocmget = serial->tiocmget;
2689 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2690 if (tiocmget->urb) {
2691 mutex_init(&tiocmget->mutex);
2692 init_waitqueue_head(&tiocmget->waitq);
2693 tiocmget->endp = hso_get_ep(
2694 interface,
2695 USB_ENDPOINT_XFER_INT,
2696 USB_DIR_IN);
2697 } else
2698 hso_free_tiomget(serial);
2699 }
2700 }
72dc1c09
GKH		 2701 else
2702 num_urbs = 1;
2703
2704 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2705 BULK_URB_TX_SIZE))
2706 goto exit;
2707
2708 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2709 USB_DIR_IN);
2710 if (!serial->in_endp) {
2711 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
e57b641d 2712 goto exit2;
72dc1c09
GKH		 2713 }
2714
2715 if (!
2716 (serial->out_endp =
2717 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2718 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
e57b641d 2719 goto exit2;
72dc1c09
GKH		 2720 }
2721
2722 serial->write_data = hso_std_serial_write_data;
2723
2724 /* and record this serial */
2725 set_serial_by_index(serial->minor, serial);
2726
2727 /* setup the proc dirs and files if needed */
2728 hso_log_port(hso_dev);
2729
2730 /* done, return it */
2731 return hso_dev;
e57b641d
AB		 2732
2733exit2:
2734 hso_serial_common_free(serial);
72dc1c09 2735exit:
542f5482 2736 hso_free_tiomget(serial);
72dc1c09 2737 kfree(serial);
e44578ea 2738 kfree(hso_dev);
72dc1c09
GKH		 2739 return NULL;
2740}
2741
2742/* Creates a multiplexed AT channel */
2743static
2744struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2745 int port,
2746 struct hso_shared_int *mux)
2747{
2748 struct hso_device *hso_dev;
2749 struct hso_serial *serial;
2750 int port_spec;
2751
2752 port_spec = HSO_INTF_MUX;
2753 port_spec &= ~HSO_PORT_MASK;
2754
2755 port_spec |= hso_mux_to_port(port);
2756 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2757 return NULL;
2758
2759 hso_dev = hso_create_device(interface, port_spec);
2760 if (!hso_dev)
2761 return NULL;
2762
2763 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2764 if (!serial)
2765 goto exit;
2766
2767 hso_dev->port_data.dev_serial = serial;
2768 serial->parent = hso_dev;
2769
2770 if (hso_serial_common_create
2771 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2772 goto exit;
2773
2774 serial->tx_data_length--;
2775 serial->write_data = hso_mux_serial_write_data;
2776
2777 serial->shared_int = mux;
2778 mutex_lock(&serial->shared_int->shared_int_lock);
2779 serial->shared_int->ref_count++;
2780 mutex_unlock(&serial->shared_int->shared_int_lock);
2781
2782 /* and record this serial */
2783 set_serial_by_index(serial->minor, serial);
2784
2785 /* setup the proc dirs and files if needed */
2786 hso_log_port(hso_dev);
2787
2788 /* done, return it */
2789 return hso_dev;
2790
2791exit:
2792 if (serial) {
2793 tty_unregister_device(tty_drv, serial->minor);
2794 kfree(serial);
2795 }
2796 if (hso_dev)
e44578ea 2797 kfree(hso_dev);
72dc1c09
GKH		 2798 return NULL;
2799
2800}
2801
2802static void hso_free_shared_int(struct hso_shared_int *mux)
2803{
2804 usb_free_urb(mux->shared_intr_urb);
2805 kfree(mux->shared_intr_buf);
2806 mutex_unlock(&mux->shared_int_lock);
2807 kfree(mux);
2808}
2809
2810static
2811struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2812{
2813 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2814
2815 if (!mux)
2816 return NULL;
2817
2818 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2819 USB_DIR_IN);
2820 if (!mux->intr_endp) {
2821 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2822 goto exit;
2823 }
2824
2825 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2826 if (!mux->shared_intr_urb) {
2827 dev_err(&interface->dev, "Could not allocate intr urb?");
2828 goto exit;
2829 }
2830 mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize,
2831 GFP_KERNEL);
2832 if (!mux->shared_intr_buf) {
2833 dev_err(&interface->dev, "Could not allocate intr buf?");
2834 goto exit;
2835 }
2836
2837 mutex_init(&mux->shared_int_lock);
2838
2839 return mux;
2840
2841exit:
2842 kfree(mux->shared_intr_buf);
2843 usb_free_urb(mux->shared_intr_urb);
2844 kfree(mux);
2845 return NULL;
2846}
2847
2848/* Gets the port spec for a certain interface */
2849static int hso_get_config_data(struct usb_interface *interface)
2850{
2851 struct usb_device *usbdev = interface_to_usbdev(interface);
2852 u8 config_data[17];
2853 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2854 s32 result;
2855
2856 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2857 0x86, 0xC0, 0, 0, config_data, 17,
2858 USB_CTRL_SET_TIMEOUT) != 0x11) {
2859 return -EIO;
2860 }
2861
2862 switch (config_data[if_num]) {
2863 case 0x0:
2864 result = 0;
2865 break;
2866 case 0x1:
2867 result = HSO_PORT_DIAG;
2868 break;
2869 case 0x2:
2870 result = HSO_PORT_GPS;
2871 break;
2872 case 0x3:
2873 result = HSO_PORT_GPS_CONTROL;
2874 break;
2875 case 0x4:
2876 result = HSO_PORT_APP;
2877 break;
2878 case 0x5:
2879 result = HSO_PORT_APP2;
2880 break;
2881 case 0x6:
2882 result = HSO_PORT_CONTROL;
2883 break;
2884 case 0x7:
2885 result = HSO_PORT_NETWORK;
2886 break;
2887 case 0x8:
2888 result = HSO_PORT_MODEM;
2889 break;
2890 case 0x9:
2891 result = HSO_PORT_MSD;
2892 break;
2893 case 0xa:
2894 result = HSO_PORT_PCSC;
2895 break;
2896 case 0xb:
2897 result = HSO_PORT_VOICE;
2898 break;
2899 default:
2900 result = 0;
2901 }
2902
2903 if (result)
2904 result |= HSO_INTF_BULK;
2905
2906 if (config_data[16] & 0x1)
2907 result |= HSO_INFO_CRC_BUG;
2908
2909 return result;
2910}
2911
2912/* called once for each interface upon device insertion */
2913static int hso_probe(struct usb_interface *interface,
2914 const struct usb_device_id *id)
2915{
2916 int mux, i, if_num, port_spec;
2917 unsigned char port_mask;
2918 struct hso_device *hso_dev = NULL;
2919 struct hso_shared_int *shared_int;
2920 struct hso_device *tmp_dev = NULL;
2921
2922 if_num = interface->altsetting->desc.bInterfaceNumber;
2923
2924 /* Get the interface/port specification from either driver_info or from
2925 * the device itself */
2926 if (id->driver_info)
2927 port_spec = ((u32 *)(id->driver_info))[if_num];
2928 else
2929 port_spec = hso_get_config_data(interface);
2930
2931 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2932 dev_err(&interface->dev, "Not our interface\n");
2933 return -ENODEV;
2934 }
2935 /* Check if we need to switch to alt interfaces prior to port
2936 * configuration */
2937 if (interface->num_altsetting > 1)
2938 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2939 interface->needs_remote_wakeup = 1;
2940
2941 /* Allocate new hso device(s) */
2942 switch (port_spec & HSO_INTF_MASK) {
2943 case HSO_INTF_MUX:
2944 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2945 /* Create the network device */
2946 if (!disable_net) {
0de8ca59
JD		 2947 hso_dev = hso_create_net_device(interface,
2948 port_spec);
72dc1c09
GKH		 2949 if (!hso_dev)
2950 goto exit;
2951 tmp_dev = hso_dev;
2952 }
2953 }
2954
2955 if (hso_get_mux_ports(interface, &port_mask))
2956 /* TODO: de-allocate everything */
2957 goto exit;
2958
2959 shared_int = hso_create_shared_int(interface);
2960 if (!shared_int)
2961 goto exit;
2962
2963 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2964 if (port_mask & i) {
2965 hso_dev = hso_create_mux_serial_device(
2966 interface, i, shared_int);
2967 if (!hso_dev)
2968 goto exit;
2969 }
2970 }
2971
2972 if (tmp_dev)
2973 hso_dev = tmp_dev;
2974 break;
2975
2976 case HSO_INTF_BULK:
2977 /* It's a regular bulk interface */
2978 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK)
2979 && !disable_net)
0de8ca59 2980 hso_dev = hso_create_net_device(interface, port_spec);
72dc1c09
GKH		 2981 else
2982 hso_dev =
2983 hso_create_bulk_serial_device(interface, port_spec);
2984 if (!hso_dev)
2985 goto exit;
2986 break;
2987 default:
2988 goto exit;
2989 }
2990
72dc1c09
GKH		 2991 /* save our data pointer in this device */
2992 usb_set_intfdata(interface, hso_dev);
2993
2994 /* done */
2995 return 0;
2996exit:
2997 hso_free_interface(interface);
2998 return -ENODEV;
2999}
3000
3001/* device removed, cleaning up */
3002static void hso_disconnect(struct usb_interface *interface)
3003{
3004 hso_free_interface(interface);
3005
3006 /* remove reference of our private data */
3007 usb_set_intfdata(interface, NULL);
72dc1c09
GKH		 3008}
3009
3010static void async_get_intf(struct work_struct *data)
3011{
3012 struct hso_device *hso_dev =
3013 container_of(data, struct hso_device, async_get_intf);
3014 usb_autopm_get_interface(hso_dev->interface);
3015}
3016
3017static void async_put_intf(struct work_struct *data)
3018{
3019 struct hso_device *hso_dev =
3020 container_of(data, struct hso_device, async_put_intf);
3021 usb_autopm_put_interface(hso_dev->interface);
3022}
3023
3024static int hso_get_activity(struct hso_device *hso_dev)
3025{
3026 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3027 if (!hso_dev->is_active) {
3028 hso_dev->is_active = 1;
3029 schedule_work(&hso_dev->async_get_intf);
3030 }
3031 }
3032
3033 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3034 return -EAGAIN;
3035
3036 usb_mark_last_busy(hso_dev->usb);
3037
3038 return 0;
3039}
3040
3041static int hso_put_activity(struct hso_device *hso_dev)
3042{
3043 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3044 if (hso_dev->is_active) {
3045 hso_dev->is_active = 0;
3046 schedule_work(&hso_dev->async_put_intf);
3047 return -EAGAIN;
3048 }
3049 }
3050 hso_dev->is_active = 0;
3051 return 0;
3052}
3053
3054/* called by kernel when we need to suspend device */
3055static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3056{
3057 int i, result;
3058
3059 /* Stop all serial ports */
3060 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3061 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3062 result = hso_stop_serial_device(serial_table[i]);
3063 if (result)
3064 goto out;
3065 }
3066 }
3067
3068 /* Stop all network ports */
3069 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3070 if (network_table[i] &&
3071 (network_table[i]->interface == iface)) {
3072 result = hso_stop_net_device(network_table[i]);
3073 if (result)
3074 goto out;
3075 }
3076 }
3077
3078out:
3079 return 0;
3080}
3081
3082/* called by kernel when we need to resume device */
3083static int hso_resume(struct usb_interface *iface)
3084{
3085 int i, result = 0;
3086 struct hso_net *hso_net;
3087
3088 /* Start all serial ports */
3089 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3090 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3091 if (dev2ser(serial_table[i])->open_count) {
3092 result =
3093 hso_start_serial_device(serial_table[i], GFP_NOIO);
3094 hso_kick_transmit(dev2ser(serial_table[i]));
3095 if (result)
3096 goto out;
3097 }
3098 }
3099 }
3100
3101 /* Start all network ports */
3102 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3103 if (network_table[i] &&
3104 (network_table[i]->interface == iface)) {
3105 hso_net = dev2net(network_table[i]);
89930b7b
DJB		 3106 if (hso_net->flags & IFF_UP) {
3107 /* First transmit any lingering data,
3108 then restart the device. */
3109 if (hso_net->skb_tx_buf) {
3110 dev_dbg(&iface->dev,
3111 "Transmitting"
3112 " lingering data\n");
3113 hso_net_start_xmit(hso_net->skb_tx_buf,
3114 hso_net->net);
3115 hso_net->skb_tx_buf = NULL;
3116 }
3117 result = hso_start_net_device(network_table[i]);
3118 if (result)
3119 goto out;
72dc1c09 3120 }
72dc1c09
GKH		 3121 }
3122 }
3123
3124out:
3125 return result;
3126}
3127
3128static void hso_serial_ref_free(struct kref *ref)
3129{
3130 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3131
3132 hso_free_serial_device(hso_dev);
3133}
3134
3135static void hso_free_interface(struct usb_interface *interface)
3136{
3137 struct hso_serial *hso_dev;
e136e303 3138 struct tty_struct *tty;
72dc1c09
GKH		 3139 int i;
3140
3141 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3142 if (serial_table[i]
3143 && (serial_table[i]->interface == interface)) {
3144 hso_dev = dev2ser(serial_table[i]);
e136e303
AC		 3145 spin_lock_irq(&hso_dev->serial_lock);
3146 tty = tty_kref_get(hso_dev->tty);
3147 spin_unlock_irq(&hso_dev->serial_lock);
3148 if (tty)
3149 tty_hangup(tty);
ab153d84 3150 mutex_lock(&hso_dev->parent->mutex);
e136e303 3151 tty_kref_put(tty);
72dc1c09 3152 hso_dev->parent->usb_gone = 1;
ab153d84
DM		 3153 mutex_unlock(&hso_dev->parent->mutex);
3154 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
72dc1c09
GKH		 3155 }
3156 }
3157
3158 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3159 if (network_table[i]
3160 && (network_table[i]->interface == interface)) {
3161 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3162 /* hso_stop_net_device doesn't stop the net queue since
3163 * traffic needs to start it again when suspended */
3164 netif_stop_queue(dev2net(network_table[i])->net);
3165 hso_stop_net_device(network_table[i]);
3166 cancel_work_sync(&network_table[i]->async_put_intf);
3167 cancel_work_sync(&network_table[i]->async_get_intf);
0235f641 3168 if (rfk)
72dc1c09
GKH		 3169 rfkill_unregister(rfk);
3170 hso_free_net_device(network_table[i]);
3171 }
3172 }
3173}
3174
3175/* Helper functions */
3176
3177/* Get the endpoint ! */
3178static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3179 int type, int dir)
3180{
3181 int i;
3182 struct usb_host_interface *iface = intf->cur_altsetting;
3183 struct usb_endpoint_descriptor *endp;
3184
3185 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3186 endp = &iface->endpoint[i].desc;
3187 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
f201a8a4 3188 (usb_endpoint_type(endp) == type))
72dc1c09
GKH		 3189 return endp;
3190 }
3191
3192 return NULL;
3193}
3194
3195/* Get the byte that describes which ports are enabled */
3196static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3197{
3198 int i;
3199 struct usb_host_interface *iface = intf->cur_altsetting;
3200
3201 if (iface->extralen == 3) {
3202 *ports = iface->extra[2];
3203 return 0;
3204 }
3205
3206 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3207 if (iface->endpoint[i].extralen == 3) {
3208 *ports = iface->endpoint[i].extra[2];
3209 return 0;
3210 }
3211 }
3212
3213 return -1;
3214}
3215
3216/* interrupt urb needs to be submitted, used for serial read of muxed port */
3217static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3218 struct usb_device *usb, gfp_t gfp)
3219{
3220 int result;
3221
3222 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3223 usb_rcvintpipe(usb,
3224 shared_int->intr_endp->bEndpointAddress & 0x7F),
3225 shared_int->shared_intr_buf,
3226 shared_int->intr_endp->wMaxPacketSize,
3227 intr_callback, shared_int,
3228 shared_int->intr_endp->bInterval);
3229
3230 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3231 if (result)
3232 dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__,
3233 result);
3234
3235 return result;
3236}
3237
3238/* operations setup of the serial interface */
6c59f569 3239static const struct tty_operations hso_serial_ops = {
72dc1c09
GKH		 3240 .open = hso_serial_open,
3241 .close = hso_serial_close,
3242 .write = hso_serial_write,
3243 .write_room = hso_serial_write_room,
542f5482 3244 .ioctl = hso_serial_ioctl,
72dc1c09
GKH		 3245 .set_termios = hso_serial_set_termios,
3246 .chars_in_buffer = hso_serial_chars_in_buffer,
3247 .tiocmget = hso_serial_tiocmget,
3248 .tiocmset = hso_serial_tiocmset,
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
GKH		 3260 .supports_autosuspend = 1,
3261};
3262
3263static int __init hso_init(void)
3264{
3265 int i;
3266 int result;
3267
3268 /* put it in the log */
3269 printk(KERN_INFO "hso: %s\n", version);
3270
3271 /* Initialise the serial table semaphore and table */
3272 spin_lock_init(&serial_table_lock);
3273 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3274 serial_table[i] = NULL;
3275
3276 /* allocate our driver using the proper amount of supported minors */
3277 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3278 if (!tty_drv)
3279 return -ENOMEM;
3280
3281 /* fill in all needed values */
3282 tty_drv->magic = TTY_DRIVER_MAGIC;
3283 tty_drv->owner = THIS_MODULE;
3284 tty_drv->driver_name = driver_name;
3285 tty_drv->name = tty_filename;
3286
3287 /* if major number is provided as parameter, use that one */
3288 if (tty_major)
3289 tty_drv->major = tty_major;
3290
3291 tty_drv->minor_start = 0;
3292 tty_drv->num = HSO_SERIAL_TTY_MINORS;
3293 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3294 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3295 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3296 tty_drv->init_termios = tty_std_termios;
ac9720c3 3297 hso_init_termios(&tty_drv->init_termios);
72dc1c09
GKH		 3298 tty_set_operations(tty_drv, &hso_serial_ops);
3299
3300 /* register the tty driver */
3301 result = tty_register_driver(tty_drv);
3302 if (result) {
3303 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3304 __func__, result);
3305 return result;
3306 }
3307
3308 /* register this module as an usb driver */
3309 result = usb_register(&hso_driver);
3310 if (result) {
3311 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3312 result);
3313 /* cleanup serial interface */
3314 tty_unregister_driver(tty_drv);
3315 return result;
3316 }
3317
3318 /* done */
3319 return 0;
3320}
3321
3322static void __exit hso_exit(void)
3323{
3324 printk(KERN_INFO "hso: unloaded\n");
3325
3326 tty_unregister_driver(tty_drv);
3327 /* deregister the usb driver */
3328 usb_deregister(&hso_driver);
3329}
3330
3331/* Module definitions */
3332module_init(hso_init);
3333module_exit(hso_exit);
3334
3335MODULE_AUTHOR(MOD_AUTHOR);
3336MODULE_DESCRIPTION(MOD_DESCRIPTION);
3337MODULE_LICENSE(MOD_LICENSE);
3338MODULE_INFO(Version, DRIVER_VERSION);
3339
3340/* change the debug level (eg: insmod hso.ko debug=0x04) */
3341MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3342module_param(debug, int, S_IRUGO | S_IWUSR);
3343
3344/* set the major tty number (eg: insmod hso.ko tty_major=245) */
3345MODULE_PARM_DESC(tty_major, "Set the major tty number");
3346module_param(tty_major, int, S_IRUGO | S_IWUSR);
3347
3348/* disable network interface (eg: insmod hso.ko disable_net=1) */
3349MODULE_PARM_DESC(disable_net, "Disable the network interface");
3350module_param(disable_net, int, S_IRUGO | S_IWUSR);
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