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1/******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
6 * Filip Aben <f.aben@option.com>
7 * Denis Joseph Barrow <d.barow@option.com>
8 * Jan Dumon <j.dumon@option.com>
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 *
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.
50 *
51 *****************************************************************************/
52
53#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
54
55#include <linux/sched/signal.h>
56#include <linux/slab.h>
57#include <linux/init.h>
58#include <linux/delay.h>
59#include <linux/netdevice.h>
60#include <linux/module.h>
61#include <linux/ethtool.h>
62#include <linux/usb.h>
63#include <linux/tty.h>
64#include <linux/tty_driver.h>
65#include <linux/tty_flip.h>
66#include <linux/kmod.h>
67#include <linux/rfkill.h>
68#include <linux/ip.h>
69#include <linux/uaccess.h>
70#include <linux/usb/cdc.h>
71#include <net/arp.h>
72#include <asm/byteorder.h>
73#include <linux/serial_core.h>
74#include <linux/serial.h>
75
76
77#define MOD_AUTHOR "Option Wireless"
78#define MOD_DESCRIPTION "USB High Speed Option driver"
79
80#define HSO_MAX_NET_DEVICES 10
81#define HSO__MAX_MTU 2048
82#define DEFAULT_MTU 1500
83#define DEFAULT_MRU 1500
84
85#define CTRL_URB_RX_SIZE 1024
86#define CTRL_URB_TX_SIZE 64
87
88#define BULK_URB_RX_SIZE 4096
89#define BULK_URB_TX_SIZE 8192
90
91#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
92#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
93#define MUX_BULK_RX_BUF_COUNT 4
94#define USB_TYPE_OPTION_VENDOR 0x20
95
96/* These definitions are used with the struct hso_net flags element */
97/* - use *_bit operations on it. (bit indices not values.) */
98#define HSO_NET_RUNNING 0
99
100#define HSO_NET_TX_TIMEOUT (HZ*10)
101
102#define HSO_SERIAL_MAGIC 0x48534f31
103
104/* Number of ttys to handle */
105#define HSO_SERIAL_TTY_MINORS 256
106
107#define MAX_RX_URBS 2
108
109/*****************************************************************************/
110/* Debugging functions */
111/*****************************************************************************/
112#define hso_dbg(lvl, fmt, ...) \
113do { \
114 if ((lvl) & debug) \
115 pr_info("[%d:%s] " fmt, \
116 __LINE__, __func__, ##__VA_ARGS__); \
117} while (0)
118
119/*****************************************************************************/
120/* Enumerators */
121/*****************************************************************************/
122enum pkt_parse_state {
123 WAIT_IP,
124 WAIT_DATA,
125 WAIT_SYNC
126};
127
128/*****************************************************************************/
129/* Structs */
130/*****************************************************************************/
131
132struct hso_shared_int {
133 struct usb_endpoint_descriptor *intr_endp;
134 void *shared_intr_buf;
135 struct urb *shared_intr_urb;
136 struct usb_device *usb;
137 int use_count;
138 int ref_count;
139 struct mutex shared_int_lock;
140};
141
142struct hso_net {
143 struct hso_device *parent;
144 struct net_device *net;
145 struct rfkill *rfkill;
146 char name[24];
147
148 struct usb_endpoint_descriptor *in_endp;
149 struct usb_endpoint_descriptor *out_endp;
150
151 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
152 struct urb *mux_bulk_tx_urb;
153 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
154 void *mux_bulk_tx_buf;
155
156 struct sk_buff *skb_rx_buf;
157 struct sk_buff *skb_tx_buf;
158
159 enum pkt_parse_state rx_parse_state;
160 spinlock_t net_lock;
161
162 unsigned short rx_buf_size;
163 unsigned short rx_buf_missing;
164 struct iphdr rx_ip_hdr;
165
166 unsigned long flags;
167};
168
169enum rx_ctrl_state{
170 RX_IDLE,
171 RX_SENT,
172 RX_PENDING
173};
174
175#define BM_REQUEST_TYPE (0xa1)
176#define B_NOTIFICATION (0x20)
177#define W_VALUE (0x0)
178#define W_LENGTH (0x2)
179
180#define B_OVERRUN (0x1<<6)
181#define B_PARITY (0x1<<5)
182#define B_FRAMING (0x1<<4)
183#define B_RING_SIGNAL (0x1<<3)
184#define B_BREAK (0x1<<2)
185#define B_TX_CARRIER (0x1<<1)
186#define B_RX_CARRIER (0x1<<0)
187
188struct hso_serial_state_notification {
189 u8 bmRequestType;
190 u8 bNotification;
191 u16 wValue;
192 u16 wIndex;
193 u16 wLength;
194 u16 UART_state_bitmap;
195} __packed;
196
197struct hso_tiocmget {
198 struct mutex mutex;
199 wait_queue_head_t waitq;
200 int intr_completed;
201 struct usb_endpoint_descriptor *endp;
202 struct urb *urb;
203 struct hso_serial_state_notification serial_state_notification;
204 u16 prev_UART_state_bitmap;
205 struct uart_icount icount;
206};
207
208
209struct hso_serial {
210 struct hso_device *parent;
211 int magic;
212 u8 minor;
213
214 struct hso_shared_int *shared_int;
215
216 /* rx/tx urb could be either a bulk urb or a control urb depending
217 on which serial port it is used on. */
218 struct urb *rx_urb[MAX_RX_URBS];
219 u8 num_rx_urbs;
220 u8 *rx_data[MAX_RX_URBS];
221 u16 rx_data_length; /* should contain allocated length */
222
223 struct urb *tx_urb;
224 u8 *tx_data;
225 u8 *tx_buffer;
226 u16 tx_data_length; /* should contain allocated length */
227 u16 tx_data_count;
228 u16 tx_buffer_count;
229 struct usb_ctrlrequest ctrl_req_tx;
230 struct usb_ctrlrequest ctrl_req_rx;
231
232 struct usb_endpoint_descriptor *in_endp;
233 struct usb_endpoint_descriptor *out_endp;
234
235 enum rx_ctrl_state rx_state;
236 u8 rts_state;
237 u8 dtr_state;
238 unsigned tx_urb_used:1;
239
240 struct tty_port port;
241 /* from usb_serial_port */
242 spinlock_t serial_lock;
243
244 int (*write_data) (struct hso_serial *serial);
245 struct hso_tiocmget *tiocmget;
246 /* Hacks required to get flow control
247 * working on the serial receive buffers
248 * so as not to drop characters on the floor.
249 */
250 int curr_rx_urb_idx;
251 u8 rx_urb_filled[MAX_RX_URBS];
252 struct tasklet_struct unthrottle_tasklet;
253};
254
255struct hso_device {
256 union {
257 struct hso_serial *dev_serial;
258 struct hso_net *dev_net;
259 } port_data;
260
261 u32 port_spec;
262
263 u8 is_active;
264 u8 usb_gone;
265 struct work_struct async_get_intf;
266 struct work_struct async_put_intf;
267
268 struct usb_device *usb;
269 struct usb_interface *interface;
270
271 struct device *dev;
272 struct kref ref;
273 struct mutex mutex;
274};
275
276/* Type of interface */
277#define HSO_INTF_MASK 0xFF00
278#define HSO_INTF_MUX 0x0100
279#define HSO_INTF_BULK 0x0200
280
281/* Type of port */
282#define HSO_PORT_MASK 0xFF
283#define HSO_PORT_NO_PORT 0x0
284#define HSO_PORT_CONTROL 0x1
285#define HSO_PORT_APP 0x2
286#define HSO_PORT_GPS 0x3
287#define HSO_PORT_PCSC 0x4
288#define HSO_PORT_APP2 0x5
289#define HSO_PORT_GPS_CONTROL 0x6
290#define HSO_PORT_MSD 0x7
291#define HSO_PORT_VOICE 0x8
292#define HSO_PORT_DIAG2 0x9
293#define HSO_PORT_DIAG 0x10
294#define HSO_PORT_MODEM 0x11
295#define HSO_PORT_NETWORK 0x12
296
297/* Additional device info */
298#define HSO_INFO_MASK 0xFF000000
299#define HSO_INFO_CRC_BUG 0x01000000
300
301/*****************************************************************************/
302/* Prototypes */
303/*****************************************************************************/
304/* Serial driver functions */
305static int hso_serial_tiocmset(struct tty_struct *tty,
306 unsigned int set, unsigned int clear);
307static void ctrl_callback(struct urb *urb);
308static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
309static void hso_kick_transmit(struct hso_serial *serial);
310/* Helper functions */
311static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
312 struct usb_device *usb, gfp_t gfp);
313static void handle_usb_error(int status, const char *function,
314 struct hso_device *hso_dev);
315static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
316 int type, int dir);
317static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
318static void hso_free_interface(struct usb_interface *intf);
319static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
320static int hso_stop_serial_device(struct hso_device *hso_dev);
321static int hso_start_net_device(struct hso_device *hso_dev);
322static void hso_free_shared_int(struct hso_shared_int *shared_int);
323static int hso_stop_net_device(struct hso_device *hso_dev);
324static void hso_serial_ref_free(struct kref *ref);
325static void hso_std_serial_read_bulk_callback(struct urb *urb);
326static int hso_mux_serial_read(struct hso_serial *serial);
327static void async_get_intf(struct work_struct *data);
328static void async_put_intf(struct work_struct *data);
329static int hso_put_activity(struct hso_device *hso_dev);
330static int hso_get_activity(struct hso_device *hso_dev);
331static void tiocmget_intr_callback(struct urb *urb);
332/*****************************************************************************/
333/* Helping functions */
334/*****************************************************************************/
335
336/* #define DEBUG */
337
338static inline struct hso_net *dev2net(struct hso_device *hso_dev)
339{
340 return hso_dev->port_data.dev_net;
341}
342
343static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
344{
345 return hso_dev->port_data.dev_serial;
346}
347
348/* Debugging functions */
349#ifdef DEBUG
350static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
351 unsigned int len)
352{
353 static char name[255];
354
355 sprintf(name, "hso[%d:%s]", line_count, func_name);
356 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
357}
358
359#define DUMP(buf_, len_) \
360 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
361
362#define DUMP1(buf_, len_) \
363 do { \
364 if (0x01 & debug) \
365 DUMP(buf_, len_); \
366 } while (0)
367#else
368#define DUMP(buf_, len_)
369#define DUMP1(buf_, len_)
370#endif
371
372/* module parameters */
373static int debug;
374static int tty_major;
375static int disable_net;
376
377/* driver info */
378static const char driver_name[] = "hso";
379static const char tty_filename[] = "ttyHS";
380static const char *version = __FILE__ ": " MOD_AUTHOR;
381/* the usb driver itself (registered in hso_init) */
382static struct usb_driver hso_driver;
383/* serial structures */
384static struct tty_driver *tty_drv;
385static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
386static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
387static spinlock_t serial_table_lock;
388
389static const s32 default_port_spec[] = {
390 HSO_INTF_MUX | HSO_PORT_NETWORK,
391 HSO_INTF_BULK | HSO_PORT_DIAG,
392 HSO_INTF_BULK | HSO_PORT_MODEM,
393 0
394};
395
396static const s32 icon321_port_spec[] = {
397 HSO_INTF_MUX | HSO_PORT_NETWORK,
398 HSO_INTF_BULK | HSO_PORT_DIAG2,
399 HSO_INTF_BULK | HSO_PORT_MODEM,
400 HSO_INTF_BULK | HSO_PORT_DIAG,
401 0
402};
403
404#define default_port_device(vendor, product) \
405 USB_DEVICE(vendor, product), \
406 .driver_info = (kernel_ulong_t)default_port_spec
407
408#define icon321_port_device(vendor, product) \
409 USB_DEVICE(vendor, product), \
410 .driver_info = (kernel_ulong_t)icon321_port_spec
411
412/* list of devices we support */
413static const struct usb_device_id hso_ids[] = {
414 {default_port_device(0x0af0, 0x6711)},
415 {default_port_device(0x0af0, 0x6731)},
416 {default_port_device(0x0af0, 0x6751)},
417 {default_port_device(0x0af0, 0x6771)},
418 {default_port_device(0x0af0, 0x6791)},
419 {default_port_device(0x0af0, 0x6811)},
420 {default_port_device(0x0af0, 0x6911)},
421 {default_port_device(0x0af0, 0x6951)},
422 {default_port_device(0x0af0, 0x6971)},
423 {default_port_device(0x0af0, 0x7011)},
424 {default_port_device(0x0af0, 0x7031)},
425 {default_port_device(0x0af0, 0x7051)},
426 {default_port_device(0x0af0, 0x7071)},
427 {default_port_device(0x0af0, 0x7111)},
428 {default_port_device(0x0af0, 0x7211)},
429 {default_port_device(0x0af0, 0x7251)},
430 {default_port_device(0x0af0, 0x7271)},
431 {default_port_device(0x0af0, 0x7311)},
432 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
433 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
434 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
435 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
436 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
437 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
438 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
439 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
440 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
441 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
442 {USB_DEVICE(0x0af0, 0x7701)},
443 {USB_DEVICE(0x0af0, 0x7706)},
444 {USB_DEVICE(0x0af0, 0x7801)},
445 {USB_DEVICE(0x0af0, 0x7901)},
446 {USB_DEVICE(0x0af0, 0x7A01)},
447 {USB_DEVICE(0x0af0, 0x7A05)},
448 {USB_DEVICE(0x0af0, 0x8200)},
449 {USB_DEVICE(0x0af0, 0x8201)},
450 {USB_DEVICE(0x0af0, 0x8300)},
451 {USB_DEVICE(0x0af0, 0x8302)},
452 {USB_DEVICE(0x0af0, 0x8304)},
453 {USB_DEVICE(0x0af0, 0x8400)},
454 {USB_DEVICE(0x0af0, 0x8600)},
455 {USB_DEVICE(0x0af0, 0x8800)},
456 {USB_DEVICE(0x0af0, 0x8900)},
457 {USB_DEVICE(0x0af0, 0x9000)},
458 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */
459 {USB_DEVICE(0x0af0, 0xd035)},
460 {USB_DEVICE(0x0af0, 0xd055)},
461 {USB_DEVICE(0x0af0, 0xd155)},
462 {USB_DEVICE(0x0af0, 0xd255)},
463 {USB_DEVICE(0x0af0, 0xd057)},
464 {USB_DEVICE(0x0af0, 0xd157)},
465 {USB_DEVICE(0x0af0, 0xd257)},
466 {USB_DEVICE(0x0af0, 0xd357)},
467 {USB_DEVICE(0x0af0, 0xd058)},
468 {USB_DEVICE(0x0af0, 0xc100)},
469 {}
470};
471MODULE_DEVICE_TABLE(usb, hso_ids);
472
473/* Sysfs attribute */
474static ssize_t hso_sysfs_show_porttype(struct device *dev,
475 struct device_attribute *attr,
476 char *buf)
477{
478 struct hso_device *hso_dev = dev_get_drvdata(dev);
479 char *port_name;
480
481 if (!hso_dev)
482 return 0;
483
484 switch (hso_dev->port_spec & HSO_PORT_MASK) {
485 case HSO_PORT_CONTROL:
486 port_name = "Control";
487 break;
488 case HSO_PORT_APP:
489 port_name = "Application";
490 break;
491 case HSO_PORT_APP2:
492 port_name = "Application2";
493 break;
494 case HSO_PORT_GPS:
495 port_name = "GPS";
496 break;
497 case HSO_PORT_GPS_CONTROL:
498 port_name = "GPS Control";
499 break;
500 case HSO_PORT_PCSC:
501 port_name = "PCSC";
502 break;
503 case HSO_PORT_DIAG:
504 port_name = "Diagnostic";
505 break;
506 case HSO_PORT_DIAG2:
507 port_name = "Diagnostic2";
508 break;
509 case HSO_PORT_MODEM:
510 port_name = "Modem";
511 break;
512 case HSO_PORT_NETWORK:
513 port_name = "Network";
514 break;
515 default:
516 port_name = "Unknown";
517 break;
518 }
519
520 return sprintf(buf, "%s\n", port_name);
521}
522static DEVICE_ATTR(hsotype, 0444, hso_sysfs_show_porttype, NULL);
523
524static struct attribute *hso_serial_dev_attrs[] = {
525 &dev_attr_hsotype.attr,
526 NULL
527};
528
529ATTRIBUTE_GROUPS(hso_serial_dev);
530
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
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{
617 struct hso_serial *serial = NULL;
618 unsigned long flags;
619
620 spin_lock_irqsave(&serial_table_lock, flags);
621 if (serial_table[index])
622 serial = dev2ser(serial_table[index]);
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 pr_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;
649
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
658static void handle_usb_error(int status, const char *function,
659 struct hso_device *hso_dev)
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 case -EILSEQ:
689 case -EPROTO:
690 case -ETIME:
691 case -ETIMEDOUT:
692 explanation = "protocol error";
693 if (hso_dev)
694 usb_queue_reset_device(hso_dev->interface);
695 break;
696 default:
697 explanation = "unknown status";
698 break;
699 }
700
701 /* log a meaningful explanation of an USB status */
702 hso_dbg(0x1, "%s: received USB status - %s (%d)\n",
703 function, explanation, status);
704}
705
706/* Network interface functions */
707
708/* called when net interface is brought up by ifconfig */
709static int hso_net_open(struct net_device *net)
710{
711 struct hso_net *odev = netdev_priv(net);
712 unsigned long flags = 0;
713
714 if (!odev) {
715 dev_err(&net->dev, "No net device !\n");
716 return -ENODEV;
717 }
718
719 odev->skb_tx_buf = NULL;
720
721 /* setup environment */
722 spin_lock_irqsave(&odev->net_lock, flags);
723 odev->rx_parse_state = WAIT_IP;
724 odev->rx_buf_size = 0;
725 odev->rx_buf_missing = sizeof(struct iphdr);
726 spin_unlock_irqrestore(&odev->net_lock, flags);
727
728 /* We are up and running. */
729 set_bit(HSO_NET_RUNNING, &odev->flags);
730 hso_start_net_device(odev->parent);
731
732 /* Tell the kernel we are ready to start receiving from it */
733 netif_start_queue(net);
734
735 return 0;
736}
737
738/* called when interface is brought down by ifconfig */
739static int hso_net_close(struct net_device *net)
740{
741 struct hso_net *odev = netdev_priv(net);
742
743 /* we don't need the queue anymore */
744 netif_stop_queue(net);
745 /* no longer running */
746 clear_bit(HSO_NET_RUNNING, &odev->flags);
747
748 hso_stop_net_device(odev->parent);
749
750 /* done */
751 return 0;
752}
753
754/* USB tells is xmit done, we should start the netqueue again */
755static void write_bulk_callback(struct urb *urb)
756{
757 struct hso_net *odev = urb->context;
758 int status = urb->status;
759
760 /* Sanity check */
761 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
762 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
763 return;
764 }
765
766 /* Do we still have a valid kernel network device? */
767 if (!netif_device_present(odev->net)) {
768 dev_err(&urb->dev->dev, "%s: net device not present\n",
769 __func__);
770 return;
771 }
772
773 /* log status, but don't act on it, we don't need to resubmit anything
774 * anyhow */
775 if (status)
776 handle_usb_error(status, __func__, odev->parent);
777
778 hso_put_activity(odev->parent);
779
780 /* Tell the network interface we are ready for another frame */
781 netif_wake_queue(odev->net);
782}
783
784/* called by kernel when we need to transmit a packet */
785static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
786 struct net_device *net)
787{
788 struct hso_net *odev = netdev_priv(net);
789 int result;
790
791 /* Tell the kernel, "No more frames 'til we are done with this one." */
792 netif_stop_queue(net);
793 if (hso_get_activity(odev->parent) == -EAGAIN) {
794 odev->skb_tx_buf = skb;
795 return NETDEV_TX_OK;
796 }
797
798 /* log if asked */
799 DUMP1(skb->data, skb->len);
800 /* Copy it from kernel memory to OUR memory */
801 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
802 hso_dbg(0x1, "len: %d/%d\n", skb->len, MUX_BULK_TX_BUF_SIZE);
803
804 /* Fill in the URB for shipping it out. */
805 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
806 odev->parent->usb,
807 usb_sndbulkpipe(odev->parent->usb,
808 odev->out_endp->
809 bEndpointAddress & 0x7F),
810 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
811 odev);
812
813 /* Deal with the Zero Length packet problem, I hope */
814 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
815
816 /* Send the URB on its merry way. */
817 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
818 if (result) {
819 dev_warn(&odev->parent->interface->dev,
820 "failed mux_bulk_tx_urb %d\n", result);
821 net->stats.tx_errors++;
822 netif_start_queue(net);
823 } else {
824 net->stats.tx_packets++;
825 net->stats.tx_bytes += skb->len;
826 }
827 dev_kfree_skb(skb);
828 /* we're done */
829 return NETDEV_TX_OK;
830}
831
832static const struct ethtool_ops ops = {
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
864 /* log if needed */
865 hso_dbg(0x1, "Rx %d bytes\n", count);
866 DUMP(ip_pkt, min(128, (int)count));
867
868 while (count) {
869 switch (odev->rx_parse_state) {
870 case WAIT_IP:
871 /* waiting for IP header. */
872 /* wanted bytes - size of ip header */
873 temp_bytes =
874 (count <
875 odev->rx_buf_missing) ? count : odev->
876 rx_buf_missing;
877
878 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
879 odev->rx_buf_size, ip_pkt + buffer_offset,
880 temp_bytes);
881
882 odev->rx_buf_size += temp_bytes;
883 buffer_offset += temp_bytes;
884 odev->rx_buf_missing -= temp_bytes;
885 count -= temp_bytes;
886
887 if (!odev->rx_buf_missing) {
888 /* header is complete allocate an sk_buffer and
889 * continue to WAIT_DATA */
890 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
891
892 if ((frame_len > DEFAULT_MRU) ||
893 (frame_len < sizeof(struct iphdr))) {
894 dev_err(&odev->net->dev,
895 "Invalid frame (%d) length\n",
896 frame_len);
897 odev->rx_parse_state = WAIT_SYNC;
898 continue;
899 }
900 /* Allocate an sk_buff */
901 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
902 frame_len);
903 if (!odev->skb_rx_buf) {
904 /* We got no receive buffer. */
905 hso_dbg(0x1, "could not allocate memory\n");
906 odev->rx_parse_state = WAIT_SYNC;
907 continue;
908 }
909
910 /* Copy what we got so far. make room for iphdr
911 * after tail. */
912 skb_put_data(odev->skb_rx_buf,
913 (char *)&(odev->rx_ip_hdr),
914 sizeof(struct iphdr));
915
916 /* ETH_HLEN */
917 odev->rx_buf_size = sizeof(struct iphdr);
918
919 /* Filip actually use .tot_len */
920 odev->rx_buf_missing =
921 frame_len - sizeof(struct iphdr);
922 odev->rx_parse_state = WAIT_DATA;
923 }
924 break;
925
926 case WAIT_DATA:
927 temp_bytes = (count < odev->rx_buf_missing)
928 ? count : odev->rx_buf_missing;
929
930 /* Copy the rest of the bytes that are left in the
931 * buffer into the waiting sk_buf. */
932 /* Make room for temp_bytes after tail. */
933 skb_put_data(odev->skb_rx_buf,
934 ip_pkt + buffer_offset,
935 temp_bytes);
936
937 odev->rx_buf_missing -= temp_bytes;
938 count -= temp_bytes;
939 buffer_offset += temp_bytes;
940 odev->rx_buf_size += temp_bytes;
941 if (!odev->rx_buf_missing) {
942 /* Packet is complete. Inject into stack. */
943 /* We have IP packet here */
944 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
945 skb_reset_mac_header(odev->skb_rx_buf);
946
947 /* Ship it off to the kernel */
948 netif_rx(odev->skb_rx_buf);
949 /* No longer our buffer. */
950 odev->skb_rx_buf = NULL;
951
952 /* update out statistics */
953 odev->net->stats.rx_packets++;
954
955 odev->net->stats.rx_bytes += odev->rx_buf_size;
956
957 odev->rx_buf_size = 0;
958 odev->rx_buf_missing = sizeof(struct iphdr);
959 odev->rx_parse_state = WAIT_IP;
960 }
961 break;
962
963 case WAIT_SYNC:
964 hso_dbg(0x1, " W_S\n");
965 count = 0;
966 break;
967 default:
968 hso_dbg(0x1, "\n");
969 count--;
970 break;
971 }
972 }
973
974 /* Recovery mechanism for WAIT_SYNC state. */
975 if (is_eop) {
976 if (odev->rx_parse_state == WAIT_SYNC) {
977 odev->rx_parse_state = WAIT_IP;
978 odev->rx_buf_size = 0;
979 odev->rx_buf_missing = sizeof(struct iphdr);
980 }
981 }
982}
983
984static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
985{
986 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
987 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
988
989 if (((rest == 5) || (rest == 6)) &&
990 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
991 crc_check, 4)) {
992 urb->actual_length -= 4;
993 }
994}
995
996/* Moving data from usb to kernel (in interrupt state) */
997static void read_bulk_callback(struct urb *urb)
998{
999 struct hso_net *odev = urb->context;
1000 struct net_device *net;
1001 int result;
1002 int status = urb->status;
1003
1004 /* is al ok? (Filip: Who's Al ?) */
1005 if (status) {
1006 handle_usb_error(status, __func__, odev->parent);
1007 return;
1008 }
1009
1010 /* Sanity check */
1011 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1012 hso_dbg(0x1, "BULK IN callback but driver is not active!\n");
1013 return;
1014 }
1015 usb_mark_last_busy(urb->dev);
1016
1017 net = odev->net;
1018
1019 if (!netif_device_present(net)) {
1020 /* Somebody killed our network interface... */
1021 return;
1022 }
1023
1024 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1025 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1026
1027 /* do we even have a packet? */
1028 if (urb->actual_length) {
1029 /* Handle the IP stream, add header and push it onto network
1030 * stack if the packet is complete. */
1031 spin_lock(&odev->net_lock);
1032 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1033 (urb->transfer_buffer_length >
1034 urb->actual_length) ? 1 : 0);
1035 spin_unlock(&odev->net_lock);
1036 }
1037
1038 /* We are done with this URB, resubmit it. Prep the USB to wait for
1039 * another frame. Reuse same as received. */
1040 usb_fill_bulk_urb(urb,
1041 odev->parent->usb,
1042 usb_rcvbulkpipe(odev->parent->usb,
1043 odev->in_endp->
1044 bEndpointAddress & 0x7F),
1045 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1046 read_bulk_callback, odev);
1047
1048 /* Give this to the USB subsystem so it can tell us when more data
1049 * arrives. */
1050 result = usb_submit_urb(urb, GFP_ATOMIC);
1051 if (result)
1052 dev_warn(&odev->parent->interface->dev,
1053 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1054 result);
1055}
1056
1057/* Serial driver functions */
1058
1059static void hso_init_termios(struct ktermios *termios)
1060{
1061 /*
1062 * The default requirements for this device are:
1063 */
1064 termios->c_iflag &=
1065 ~(IGNBRK /* disable ignore break */
1066 | BRKINT /* disable break causes interrupt */
1067 | PARMRK /* disable mark parity errors */
1068 | ISTRIP /* disable clear high bit of input characters */
1069 | INLCR /* disable translate NL to CR */
1070 | IGNCR /* disable ignore CR */
1071 | ICRNL /* disable translate CR to NL */
1072 | IXON); /* disable enable XON/XOFF flow control */
1073
1074 /* disable postprocess output characters */
1075 termios->c_oflag &= ~OPOST;
1076
1077 termios->c_lflag &=
1078 ~(ECHO /* disable echo input characters */
1079 | ECHONL /* disable echo new line */
1080 | ICANON /* disable erase, kill, werase, and rprnt
1081 special characters */
1082 | ISIG /* disable interrupt, quit, and suspend special
1083 characters */
1084 | IEXTEN); /* disable non-POSIX special characters */
1085
1086 termios->c_cflag &=
1087 ~(CSIZE /* no size */
1088 | PARENB /* disable parity bit */
1089 | CBAUD /* clear current baud rate */
1090 | CBAUDEX); /* clear current buad rate */
1091
1092 termios->c_cflag |= CS8; /* character size 8 bits */
1093
1094 /* baud rate 115200 */
1095 tty_termios_encode_baud_rate(termios, 115200, 115200);
1096}
1097
1098static void _hso_serial_set_termios(struct tty_struct *tty,
1099 struct ktermios *old)
1100{
1101 struct hso_serial *serial = tty->driver_data;
1102
1103 if (!serial) {
1104 pr_err("%s: no tty structures", __func__);
1105 return;
1106 }
1107
1108 hso_dbg(0x8, "port %d\n", serial->minor);
1109
1110 /*
1111 * Fix up unsupported bits
1112 */
1113 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1114
1115 tty->termios.c_cflag &=
1116 ~(CSIZE /* no size */
1117 | PARENB /* disable parity bit */
1118 | CBAUD /* clear current baud rate */
1119 | CBAUDEX); /* clear current buad rate */
1120
1121 tty->termios.c_cflag |= CS8; /* character size 8 bits */
1122
1123 /* baud rate 115200 */
1124 tty_encode_baud_rate(tty, 115200, 115200);
1125}
1126
1127static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1128{
1129 int result;
1130 /* We are done with this URB, resubmit it. Prep the USB to wait for
1131 * another frame */
1132 usb_fill_bulk_urb(urb, serial->parent->usb,
1133 usb_rcvbulkpipe(serial->parent->usb,
1134 serial->in_endp->
1135 bEndpointAddress & 0x7F),
1136 urb->transfer_buffer, serial->rx_data_length,
1137 hso_std_serial_read_bulk_callback, serial);
1138 /* Give this to the USB subsystem so it can tell us when more data
1139 * arrives. */
1140 result = usb_submit_urb(urb, GFP_ATOMIC);
1141 if (result) {
1142 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1143 __func__, result);
1144 }
1145}
1146
1147
1148
1149
1150static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1151{
1152 int count;
1153 struct urb *curr_urb;
1154
1155 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1156 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1157 count = put_rxbuf_data(curr_urb, serial);
1158 if (count == -1)
1159 return;
1160 if (count == 0) {
1161 serial->curr_rx_urb_idx++;
1162 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1163 serial->curr_rx_urb_idx = 0;
1164 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1165 }
1166 }
1167}
1168
1169static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1170{
1171 int count = 0;
1172 struct urb *urb;
1173
1174 urb = serial->rx_urb[0];
1175 if (serial->port.count > 0) {
1176 count = put_rxbuf_data(urb, serial);
1177 if (count == -1)
1178 return;
1179 }
1180 /* Re issue a read as long as we receive data. */
1181
1182 if (count == 0 && ((urb->actual_length != 0) ||
1183 (serial->rx_state == RX_PENDING))) {
1184 serial->rx_state = RX_SENT;
1185 hso_mux_serial_read(serial);
1186 } else
1187 serial->rx_state = RX_IDLE;
1188}
1189
1190
1191/* read callback for Diag and CS port */
1192static void hso_std_serial_read_bulk_callback(struct urb *urb)
1193{
1194 struct hso_serial *serial = urb->context;
1195 int status = urb->status;
1196
1197 hso_dbg(0x8, "--- Got serial_read_bulk callback %02x ---\n", status);
1198
1199 /* sanity check */
1200 if (!serial) {
1201 hso_dbg(0x1, "serial == NULL\n");
1202 return;
1203 }
1204 if (status) {
1205 handle_usb_error(status, __func__, serial->parent);
1206 return;
1207 }
1208
1209 hso_dbg(0x1, "Actual length = %d\n", urb->actual_length);
1210 DUMP1(urb->transfer_buffer, urb->actual_length);
1211
1212 /* Anyone listening? */
1213 if (serial->port.count == 0)
1214 return;
1215
1216 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1217 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1218 /* Valid data, handle RX data */
1219 spin_lock(&serial->serial_lock);
1220 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1221 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1222 spin_unlock(&serial->serial_lock);
1223}
1224
1225/*
1226 * This needs to be a tasklet otherwise we will
1227 * end up recursively calling this function.
1228 */
1229static void hso_unthrottle_tasklet(struct hso_serial *serial)
1230{
1231 unsigned long flags;
1232
1233 spin_lock_irqsave(&serial->serial_lock, flags);
1234 if ((serial->parent->port_spec & HSO_INTF_MUX))
1235 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1236 else
1237 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1238 spin_unlock_irqrestore(&serial->serial_lock, flags);
1239}
1240
1241static void hso_unthrottle(struct tty_struct *tty)
1242{
1243 struct hso_serial *serial = tty->driver_data;
1244
1245 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1246}
1247
1248/* open the requested serial port */
1249static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1250{
1251 struct hso_serial *serial = get_serial_by_index(tty->index);
1252 int result;
1253
1254 /* sanity check */
1255 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1256 WARN_ON(1);
1257 tty->driver_data = NULL;
1258 hso_dbg(0x1, "Failed to open port\n");
1259 return -ENODEV;
1260 }
1261
1262 mutex_lock(&serial->parent->mutex);
1263 result = usb_autopm_get_interface(serial->parent->interface);
1264 if (result < 0)
1265 goto err_out;
1266
1267 hso_dbg(0x1, "Opening %d\n", serial->minor);
1268
1269 /* setup */
1270 tty->driver_data = serial;
1271 tty_port_tty_set(&serial->port, tty);
1272
1273 /* check for port already opened, if not set the termios */
1274 serial->port.count++;
1275 if (serial->port.count == 1) {
1276 serial->rx_state = RX_IDLE;
1277 /* Force default termio settings */
1278 _hso_serial_set_termios(tty, NULL);
1279 tasklet_init(&serial->unthrottle_tasklet,
1280 (void (*)(unsigned long))hso_unthrottle_tasklet,
1281 (unsigned long)serial);
1282 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1283 if (result) {
1284 hso_stop_serial_device(serial->parent);
1285 serial->port.count--;
1286 } else {
1287 kref_get(&serial->parent->ref);
1288 }
1289 } else {
1290 hso_dbg(0x1, "Port was already open\n");
1291 }
1292
1293 usb_autopm_put_interface(serial->parent->interface);
1294
1295 /* done */
1296 if (result)
1297 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1298err_out:
1299 mutex_unlock(&serial->parent->mutex);
1300 return result;
1301}
1302
1303/* close the requested serial port */
1304static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1305{
1306 struct hso_serial *serial = tty->driver_data;
1307 u8 usb_gone;
1308
1309 hso_dbg(0x1, "Closing serial port\n");
1310
1311 /* Open failed, no close cleanup required */
1312 if (serial == NULL)
1313 return;
1314
1315 mutex_lock(&serial->parent->mutex);
1316 usb_gone = serial->parent->usb_gone;
1317
1318 if (!usb_gone)
1319 usb_autopm_get_interface(serial->parent->interface);
1320
1321 /* reset the rts and dtr */
1322 /* do the actual close */
1323 serial->port.count--;
1324
1325 if (serial->port.count <= 0) {
1326 serial->port.count = 0;
1327 tty_port_tty_set(&serial->port, NULL);
1328 if (!usb_gone)
1329 hso_stop_serial_device(serial->parent);
1330 tasklet_kill(&serial->unthrottle_tasklet);
1331 }
1332
1333 if (!usb_gone)
1334 usb_autopm_put_interface(serial->parent->interface);
1335
1336 mutex_unlock(&serial->parent->mutex);
1337}
1338
1339/* close the requested serial port */
1340static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1341 int count)
1342{
1343 struct hso_serial *serial = tty->driver_data;
1344 int space, tx_bytes;
1345 unsigned long flags;
1346
1347 /* sanity check */
1348 if (serial == NULL) {
1349 pr_err("%s: serial is NULL\n", __func__);
1350 return -ENODEV;
1351 }
1352
1353 spin_lock_irqsave(&serial->serial_lock, flags);
1354
1355 space = serial->tx_data_length - serial->tx_buffer_count;
1356 tx_bytes = (count < space) ? count : space;
1357
1358 if (!tx_bytes)
1359 goto out;
1360
1361 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1362 serial->tx_buffer_count += tx_bytes;
1363
1364out:
1365 spin_unlock_irqrestore(&serial->serial_lock, flags);
1366
1367 hso_kick_transmit(serial);
1368 /* done */
1369 return tx_bytes;
1370}
1371
1372/* how much room is there for writing */
1373static int hso_serial_write_room(struct tty_struct *tty)
1374{
1375 struct hso_serial *serial = tty->driver_data;
1376 int room;
1377 unsigned long flags;
1378
1379 spin_lock_irqsave(&serial->serial_lock, flags);
1380 room = serial->tx_data_length - serial->tx_buffer_count;
1381 spin_unlock_irqrestore(&serial->serial_lock, flags);
1382
1383 /* return free room */
1384 return room;
1385}
1386
1387static void hso_serial_cleanup(struct tty_struct *tty)
1388{
1389 struct hso_serial *serial = tty->driver_data;
1390
1391 if (!serial)
1392 return;
1393
1394 kref_put(&serial->parent->ref, hso_serial_ref_free);
1395}
1396
1397/* setup the term */
1398static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1399{
1400 struct hso_serial *serial = tty->driver_data;
1401 unsigned long flags;
1402
1403 if (old)
1404 hso_dbg(0x16, "Termios called with: cflags new[%d] - old[%d]\n",
1405 tty->termios.c_cflag, old->c_cflag);
1406
1407 /* the actual setup */
1408 spin_lock_irqsave(&serial->serial_lock, flags);
1409 if (serial->port.count)
1410 _hso_serial_set_termios(tty, old);
1411 else
1412 tty->termios = *old;
1413 spin_unlock_irqrestore(&serial->serial_lock, flags);
1414
1415 /* done */
1416}
1417
1418/* how many characters in the buffer */
1419static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1420{
1421 struct hso_serial *serial = tty->driver_data;
1422 int chars;
1423 unsigned long flags;
1424
1425 /* sanity check */
1426 if (serial == NULL)
1427 return 0;
1428
1429 spin_lock_irqsave(&serial->serial_lock, flags);
1430 chars = serial->tx_buffer_count;
1431 spin_unlock_irqrestore(&serial->serial_lock, flags);
1432
1433 return chars;
1434}
1435static int tiocmget_submit_urb(struct hso_serial *serial,
1436 struct hso_tiocmget *tiocmget,
1437 struct usb_device *usb)
1438{
1439 int result;
1440
1441 if (serial->parent->usb_gone)
1442 return -ENODEV;
1443 usb_fill_int_urb(tiocmget->urb, usb,
1444 usb_rcvintpipe(usb,
1445 tiocmget->endp->
1446 bEndpointAddress & 0x7F),
1447 &tiocmget->serial_state_notification,
1448 sizeof(struct hso_serial_state_notification),
1449 tiocmget_intr_callback, serial,
1450 tiocmget->endp->bInterval);
1451 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1452 if (result) {
1453 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1454 result);
1455 }
1456 return result;
1457
1458}
1459
1460static void tiocmget_intr_callback(struct urb *urb)
1461{
1462 struct hso_serial *serial = urb->context;
1463 struct hso_tiocmget *tiocmget;
1464 int status = urb->status;
1465 u16 UART_state_bitmap, prev_UART_state_bitmap;
1466 struct uart_icount *icount;
1467 struct hso_serial_state_notification *serial_state_notification;
1468 struct usb_device *usb;
1469 struct usb_interface *interface;
1470 int if_num;
1471
1472 /* Sanity checks */
1473 if (!serial)
1474 return;
1475 if (status) {
1476 handle_usb_error(status, __func__, serial->parent);
1477 return;
1478 }
1479
1480 /* tiocmget is only supported on HSO_PORT_MODEM */
1481 tiocmget = serial->tiocmget;
1482 if (!tiocmget)
1483 return;
1484 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
1485
1486 usb = serial->parent->usb;
1487 interface = serial->parent->interface;
1488
1489 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1490
1491 /* wIndex should be the USB interface number of the port to which the
1492 * notification applies, which should always be the Modem port.
1493 */
1494 serial_state_notification = &tiocmget->serial_state_notification;
1495 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1496 serial_state_notification->bNotification != B_NOTIFICATION ||
1497 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1498 le16_to_cpu(serial_state_notification->wIndex) != if_num ||
1499 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1500 dev_warn(&usb->dev,
1501 "hso received invalid serial state notification\n");
1502 DUMP(serial_state_notification,
1503 sizeof(struct hso_serial_state_notification));
1504 } else {
1505
1506 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1507 UART_state_bitmap);
1508 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1509 icount = &tiocmget->icount;
1510 spin_lock(&serial->serial_lock);
1511 if ((UART_state_bitmap & B_OVERRUN) !=
1512 (prev_UART_state_bitmap & B_OVERRUN))
1513 icount->parity++;
1514 if ((UART_state_bitmap & B_PARITY) !=
1515 (prev_UART_state_bitmap & B_PARITY))
1516 icount->parity++;
1517 if ((UART_state_bitmap & B_FRAMING) !=
1518 (prev_UART_state_bitmap & B_FRAMING))
1519 icount->frame++;
1520 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1521 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1522 icount->rng++;
1523 if ((UART_state_bitmap & B_BREAK) !=
1524 (prev_UART_state_bitmap & B_BREAK))
1525 icount->brk++;
1526 if ((UART_state_bitmap & B_TX_CARRIER) !=
1527 (prev_UART_state_bitmap & B_TX_CARRIER))
1528 icount->dsr++;
1529 if ((UART_state_bitmap & B_RX_CARRIER) !=
1530 (prev_UART_state_bitmap & B_RX_CARRIER))
1531 icount->dcd++;
1532 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1533 spin_unlock(&serial->serial_lock);
1534 tiocmget->intr_completed = 1;
1535 wake_up_interruptible(&tiocmget->waitq);
1536 }
1537 memset(serial_state_notification, 0,
1538 sizeof(struct hso_serial_state_notification));
1539 tiocmget_submit_urb(serial,
1540 tiocmget,
1541 serial->parent->usb);
1542}
1543
1544/*
1545 * next few functions largely stolen from drivers/serial/serial_core.c
1546 */
1547/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1548 * - mask passed in arg for lines of interest
1549 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1550 * Caller should use TIOCGICOUNT to see which one it was
1551 */
1552static int
1553hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1554{
1555 DECLARE_WAITQUEUE(wait, current);
1556 struct uart_icount cprev, cnow;
1557 struct hso_tiocmget *tiocmget;
1558 int ret;
1559
1560 tiocmget = serial->tiocmget;
1561 if (!tiocmget)
1562 return -ENOENT;
1563 /*
1564 * note the counters on entry
1565 */
1566 spin_lock_irq(&serial->serial_lock);
1567 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1568 spin_unlock_irq(&serial->serial_lock);
1569 add_wait_queue(&tiocmget->waitq, &wait);
1570 for (;;) {
1571 spin_lock_irq(&serial->serial_lock);
1572 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1573 spin_unlock_irq(&serial->serial_lock);
1574 set_current_state(TASK_INTERRUPTIBLE);
1575 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1576 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1577 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1578 ret = 0;
1579 break;
1580 }
1581 schedule();
1582 /* see if a signal did it */
1583 if (signal_pending(current)) {
1584 ret = -ERESTARTSYS;
1585 break;
1586 }
1587 cprev = cnow;
1588 }
1589 __set_current_state(TASK_RUNNING);
1590 remove_wait_queue(&tiocmget->waitq, &wait);
1591
1592 return ret;
1593}
1594
1595/*
1596 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1597 * Return: write counters to the user passed counter struct
1598 * NB: both 1->0 and 0->1 transitions are counted except for
1599 * RI where only 0->1 is counted.
1600 */
1601static int hso_get_count(struct tty_struct *tty,
1602 struct serial_icounter_struct *icount)
1603{
1604 struct uart_icount cnow;
1605 struct hso_serial *serial = tty->driver_data;
1606 struct hso_tiocmget *tiocmget = serial->tiocmget;
1607
1608 memset(icount, 0, sizeof(struct serial_icounter_struct));
1609
1610 if (!tiocmget)
1611 return -ENOENT;
1612 spin_lock_irq(&serial->serial_lock);
1613 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1614 spin_unlock_irq(&serial->serial_lock);
1615
1616 icount->cts = cnow.cts;
1617 icount->dsr = cnow.dsr;
1618 icount->rng = cnow.rng;
1619 icount->dcd = cnow.dcd;
1620 icount->rx = cnow.rx;
1621 icount->tx = cnow.tx;
1622 icount->frame = cnow.frame;
1623 icount->overrun = cnow.overrun;
1624 icount->parity = cnow.parity;
1625 icount->brk = cnow.brk;
1626 icount->buf_overrun = cnow.buf_overrun;
1627
1628 return 0;
1629}
1630
1631
1632static int hso_serial_tiocmget(struct tty_struct *tty)
1633{
1634 int retval;
1635 struct hso_serial *serial = tty->driver_data;
1636 struct hso_tiocmget *tiocmget;
1637 u16 UART_state_bitmap;
1638
1639 /* sanity check */
1640 if (!serial) {
1641 hso_dbg(0x1, "no tty structures\n");
1642 return -EINVAL;
1643 }
1644 spin_lock_irq(&serial->serial_lock);
1645 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1646 ((serial->dtr_state) ? TIOCM_DTR : 0);
1647 tiocmget = serial->tiocmget;
1648 if (tiocmget) {
1649
1650 UART_state_bitmap = le16_to_cpu(
1651 tiocmget->prev_UART_state_bitmap);
1652 if (UART_state_bitmap & B_RING_SIGNAL)
1653 retval |= TIOCM_RNG;
1654 if (UART_state_bitmap & B_RX_CARRIER)
1655 retval |= TIOCM_CD;
1656 if (UART_state_bitmap & B_TX_CARRIER)
1657 retval |= TIOCM_DSR;
1658 }
1659 spin_unlock_irq(&serial->serial_lock);
1660 return retval;
1661}
1662
1663static int hso_serial_tiocmset(struct tty_struct *tty,
1664 unsigned int set, unsigned int clear)
1665{
1666 int val = 0;
1667 unsigned long flags;
1668 int if_num;
1669 struct hso_serial *serial = tty->driver_data;
1670 struct usb_interface *interface;
1671
1672 /* sanity check */
1673 if (!serial) {
1674 hso_dbg(0x1, "no tty structures\n");
1675 return -EINVAL;
1676 }
1677
1678 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1679 return -EINVAL;
1680
1681 interface = serial->parent->interface;
1682 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1683
1684 spin_lock_irqsave(&serial->serial_lock, flags);
1685 if (set & TIOCM_RTS)
1686 serial->rts_state = 1;
1687 if (set & TIOCM_DTR)
1688 serial->dtr_state = 1;
1689
1690 if (clear & TIOCM_RTS)
1691 serial->rts_state = 0;
1692 if (clear & TIOCM_DTR)
1693 serial->dtr_state = 0;
1694
1695 if (serial->dtr_state)
1696 val |= 0x01;
1697 if (serial->rts_state)
1698 val |= 0x02;
1699
1700 spin_unlock_irqrestore(&serial->serial_lock, flags);
1701
1702 return usb_control_msg(serial->parent->usb,
1703 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1704 0x21, val, if_num, NULL, 0,
1705 USB_CTRL_SET_TIMEOUT);
1706}
1707
1708static int hso_serial_ioctl(struct tty_struct *tty,
1709 unsigned int cmd, unsigned long arg)
1710{
1711 struct hso_serial *serial = tty->driver_data;
1712 int ret = 0;
1713 hso_dbg(0x8, "IOCTL cmd: %d, arg: %ld\n", cmd, arg);
1714
1715 if (!serial)
1716 return -ENODEV;
1717 switch (cmd) {
1718 case TIOCMIWAIT:
1719 ret = hso_wait_modem_status(serial, arg);
1720 break;
1721 default:
1722 ret = -ENOIOCTLCMD;
1723 break;
1724 }
1725 return ret;
1726}
1727
1728
1729/* starts a transmit */
1730static void hso_kick_transmit(struct hso_serial *serial)
1731{
1732 u8 *temp;
1733 unsigned long flags;
1734 int res;
1735
1736 spin_lock_irqsave(&serial->serial_lock, flags);
1737 if (!serial->tx_buffer_count)
1738 goto out;
1739
1740 if (serial->tx_urb_used)
1741 goto out;
1742
1743 /* Wakeup USB interface if necessary */
1744 if (hso_get_activity(serial->parent) == -EAGAIN)
1745 goto out;
1746
1747 /* Switch pointers around to avoid memcpy */
1748 temp = serial->tx_buffer;
1749 serial->tx_buffer = serial->tx_data;
1750 serial->tx_data = temp;
1751 serial->tx_data_count = serial->tx_buffer_count;
1752 serial->tx_buffer_count = 0;
1753
1754 /* If temp is set, it means we switched buffers */
1755 if (temp && serial->write_data) {
1756 res = serial->write_data(serial);
1757 if (res >= 0)
1758 serial->tx_urb_used = 1;
1759 }
1760out:
1761 spin_unlock_irqrestore(&serial->serial_lock, flags);
1762}
1763
1764/* make a request (for reading and writing data to muxed serial port) */
1765static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1766 struct urb *ctrl_urb,
1767 struct usb_ctrlrequest *ctrl_req,
1768 u8 *ctrl_urb_data, u32 size)
1769{
1770 int result;
1771 int pipe;
1772
1773 /* Sanity check */
1774 if (!serial || !ctrl_urb || !ctrl_req) {
1775 pr_err("%s: Wrong arguments\n", __func__);
1776 return -EINVAL;
1777 }
1778
1779 /* initialize */
1780 ctrl_req->wValue = 0;
1781 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1782 ctrl_req->wLength = cpu_to_le16(size);
1783
1784 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1785 /* Reading command */
1786 ctrl_req->bRequestType = USB_DIR_IN |
1787 USB_TYPE_OPTION_VENDOR |
1788 USB_RECIP_INTERFACE;
1789 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1790 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1791 } else {
1792 /* Writing command */
1793 ctrl_req->bRequestType = USB_DIR_OUT |
1794 USB_TYPE_OPTION_VENDOR |
1795 USB_RECIP_INTERFACE;
1796 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1797 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1798 }
1799 /* syslog */
1800 hso_dbg(0x2, "%s command (%02x) len: %d, port: %d\n",
1801 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1802 ctrl_req->bRequestType, ctrl_req->wLength, port);
1803
1804 /* Load ctrl urb */
1805 ctrl_urb->transfer_flags = 0;
1806 usb_fill_control_urb(ctrl_urb,
1807 serial->parent->usb,
1808 pipe,
1809 (u8 *) ctrl_req,
1810 ctrl_urb_data, size, ctrl_callback, serial);
1811 /* Send it on merry way */
1812 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1813 if (result) {
1814 dev_err(&ctrl_urb->dev->dev,
1815 "%s failed submit ctrl_urb %d type %d\n", __func__,
1816 result, type);
1817 return result;
1818 }
1819
1820 /* done */
1821 return size;
1822}
1823
1824/* called by intr_callback when read occurs */
1825static int hso_mux_serial_read(struct hso_serial *serial)
1826{
1827 if (!serial)
1828 return -EINVAL;
1829
1830 /* clean data */
1831 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1832 /* make the request */
1833
1834 if (serial->num_rx_urbs != 1) {
1835 dev_err(&serial->parent->interface->dev,
1836 "ERROR: mux'd reads with multiple buffers "
1837 "not possible\n");
1838 return 0;
1839 }
1840 return mux_device_request(serial,
1841 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1842 serial->parent->port_spec & HSO_PORT_MASK,
1843 serial->rx_urb[0],
1844 &serial->ctrl_req_rx,
1845 serial->rx_data[0], serial->rx_data_length);
1846}
1847
1848/* used for muxed serial port callback (muxed serial read) */
1849static void intr_callback(struct urb *urb)
1850{
1851 struct hso_shared_int *shared_int = urb->context;
1852 struct hso_serial *serial;
1853 unsigned char *port_req;
1854 int status = urb->status;
1855 int i;
1856
1857 usb_mark_last_busy(urb->dev);
1858
1859 /* sanity check */
1860 if (!shared_int)
1861 return;
1862
1863 /* status check */
1864 if (status) {
1865 handle_usb_error(status, __func__, NULL);
1866 return;
1867 }
1868 hso_dbg(0x8, "--- Got intr callback 0x%02X ---\n", status);
1869
1870 /* what request? */
1871 port_req = urb->transfer_buffer;
1872 hso_dbg(0x8, "port_req = 0x%.2X\n", *port_req);
1873 /* loop over all muxed ports to find the one sending this */
1874 for (i = 0; i < 8; i++) {
1875 /* max 8 channels on MUX */
1876 if (*port_req & (1 << i)) {
1877 serial = get_serial_by_shared_int_and_type(shared_int,
1878 (1 << i));
1879 if (serial != NULL) {
1880 hso_dbg(0x1, "Pending read interrupt on port %d\n",
1881 i);
1882 spin_lock(&serial->serial_lock);
1883 if (serial->rx_state == RX_IDLE &&
1884 serial->port.count > 0) {
1885 /* Setup and send a ctrl req read on
1886 * port i */
1887 if (!serial->rx_urb_filled[0]) {
1888 serial->rx_state = RX_SENT;
1889 hso_mux_serial_read(serial);
1890 } else
1891 serial->rx_state = RX_PENDING;
1892 } else {
1893 hso_dbg(0x1, "Already a read pending on port %d or port not open\n",
1894 i);
1895 }
1896 spin_unlock(&serial->serial_lock);
1897 }
1898 }
1899 }
1900 /* Resubmit interrupt urb */
1901 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1902}
1903
1904/* called for writing to muxed serial port */
1905static int hso_mux_serial_write_data(struct hso_serial *serial)
1906{
1907 if (NULL == serial)
1908 return -EINVAL;
1909
1910 return mux_device_request(serial,
1911 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1912 serial->parent->port_spec & HSO_PORT_MASK,
1913 serial->tx_urb,
1914 &serial->ctrl_req_tx,
1915 serial->tx_data, serial->tx_data_count);
1916}
1917
1918/* write callback for Diag and CS port */
1919static void hso_std_serial_write_bulk_callback(struct urb *urb)
1920{
1921 struct hso_serial *serial = urb->context;
1922 int status = urb->status;
1923
1924 /* sanity check */
1925 if (!serial) {
1926 hso_dbg(0x1, "serial == NULL\n");
1927 return;
1928 }
1929
1930 spin_lock(&serial->serial_lock);
1931 serial->tx_urb_used = 0;
1932 spin_unlock(&serial->serial_lock);
1933 if (status) {
1934 handle_usb_error(status, __func__, serial->parent);
1935 return;
1936 }
1937 hso_put_activity(serial->parent);
1938 tty_port_tty_wakeup(&serial->port);
1939 hso_kick_transmit(serial);
1940
1941 hso_dbg(0x1, "\n");
1942}
1943
1944/* called for writing diag or CS serial port */
1945static int hso_std_serial_write_data(struct hso_serial *serial)
1946{
1947 int count = serial->tx_data_count;
1948 int result;
1949
1950 usb_fill_bulk_urb(serial->tx_urb,
1951 serial->parent->usb,
1952 usb_sndbulkpipe(serial->parent->usb,
1953 serial->out_endp->
1954 bEndpointAddress & 0x7F),
1955 serial->tx_data, serial->tx_data_count,
1956 hso_std_serial_write_bulk_callback, serial);
1957
1958 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1959 if (result) {
1960 dev_warn(&serial->parent->usb->dev,
1961 "Failed to submit urb - res %d\n", result);
1962 return result;
1963 }
1964
1965 return count;
1966}
1967
1968/* callback after read or write on muxed serial port */
1969static void ctrl_callback(struct urb *urb)
1970{
1971 struct hso_serial *serial = urb->context;
1972 struct usb_ctrlrequest *req;
1973 int status = urb->status;
1974
1975 /* sanity check */
1976 if (!serial)
1977 return;
1978
1979 spin_lock(&serial->serial_lock);
1980 serial->tx_urb_used = 0;
1981 spin_unlock(&serial->serial_lock);
1982 if (status) {
1983 handle_usb_error(status, __func__, serial->parent);
1984 return;
1985 }
1986
1987 /* what request? */
1988 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1989 hso_dbg(0x8, "--- Got muxed ctrl callback 0x%02X ---\n", status);
1990 hso_dbg(0x8, "Actual length of urb = %d\n", urb->actual_length);
1991 DUMP1(urb->transfer_buffer, urb->actual_length);
1992
1993 if (req->bRequestType ==
1994 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
1995 /* response to a read command */
1996 serial->rx_urb_filled[0] = 1;
1997 spin_lock(&serial->serial_lock);
1998 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1999 spin_unlock(&serial->serial_lock);
2000 } else {
2001 hso_put_activity(serial->parent);
2002 tty_port_tty_wakeup(&serial->port);
2003 /* response to a write command */
2004 hso_kick_transmit(serial);
2005 }
2006}
2007
2008/* handle RX data for serial port */
2009static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2010{
2011 struct tty_struct *tty;
2012 int count;
2013
2014 /* Sanity check */
2015 if (urb == NULL || serial == NULL) {
2016 hso_dbg(0x1, "serial = NULL\n");
2017 return -2;
2018 }
2019
2020 tty = tty_port_tty_get(&serial->port);
2021
2022 if (tty && tty_throttled(tty)) {
2023 tty_kref_put(tty);
2024 return -1;
2025 }
2026
2027 /* Push data to tty */
2028 hso_dbg(0x1, "data to push to tty\n");
2029 count = tty_buffer_request_room(&serial->port, urb->actual_length);
2030 if (count >= urb->actual_length) {
2031 tty_insert_flip_string(&serial->port, urb->transfer_buffer,
2032 urb->actual_length);
2033 tty_flip_buffer_push(&serial->port);
2034 } else {
2035 dev_warn(&serial->parent->usb->dev,
2036 "dropping data, %d bytes lost\n", urb->actual_length);
2037 }
2038
2039 tty_kref_put(tty);
2040
2041 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2042
2043 return 0;
2044}
2045
2046
2047/* Base driver functions */
2048
2049static void hso_log_port(struct hso_device *hso_dev)
2050{
2051 char *port_type;
2052 char port_dev[20];
2053
2054 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2055 case HSO_PORT_CONTROL:
2056 port_type = "Control";
2057 break;
2058 case HSO_PORT_APP:
2059 port_type = "Application";
2060 break;
2061 case HSO_PORT_GPS:
2062 port_type = "GPS";
2063 break;
2064 case HSO_PORT_GPS_CONTROL:
2065 port_type = "GPS control";
2066 break;
2067 case HSO_PORT_APP2:
2068 port_type = "Application2";
2069 break;
2070 case HSO_PORT_PCSC:
2071 port_type = "PCSC";
2072 break;
2073 case HSO_PORT_DIAG:
2074 port_type = "Diagnostic";
2075 break;
2076 case HSO_PORT_DIAG2:
2077 port_type = "Diagnostic2";
2078 break;
2079 case HSO_PORT_MODEM:
2080 port_type = "Modem";
2081 break;
2082 case HSO_PORT_NETWORK:
2083 port_type = "Network";
2084 break;
2085 default:
2086 port_type = "Unknown";
2087 break;
2088 }
2089 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2090 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2091 } else
2092 sprintf(port_dev, "/dev/%s%d", tty_filename,
2093 dev2ser(hso_dev)->minor);
2094
2095 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2096 port_type, port_dev);
2097}
2098
2099static int hso_start_net_device(struct hso_device *hso_dev)
2100{
2101 int i, result = 0;
2102 struct hso_net *hso_net = dev2net(hso_dev);
2103
2104 if (!hso_net)
2105 return -ENODEV;
2106
2107 /* send URBs for all read buffers */
2108 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2109
2110 /* Prep a receive URB */
2111 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2112 hso_dev->usb,
2113 usb_rcvbulkpipe(hso_dev->usb,
2114 hso_net->in_endp->
2115 bEndpointAddress & 0x7F),
2116 hso_net->mux_bulk_rx_buf_pool[i],
2117 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2118 hso_net);
2119
2120 /* Put it out there so the device can send us stuff */
2121 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2122 GFP_NOIO);
2123 if (result)
2124 dev_warn(&hso_dev->usb->dev,
2125 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2126 i, result);
2127 }
2128
2129 return result;
2130}
2131
2132static int hso_stop_net_device(struct hso_device *hso_dev)
2133{
2134 int i;
2135 struct hso_net *hso_net = dev2net(hso_dev);
2136
2137 if (!hso_net)
2138 return -ENODEV;
2139
2140 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2141 if (hso_net->mux_bulk_rx_urb_pool[i])
2142 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2143
2144 }
2145 if (hso_net->mux_bulk_tx_urb)
2146 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2147
2148 return 0;
2149}
2150
2151static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2152{
2153 int i, result = 0;
2154 struct hso_serial *serial = dev2ser(hso_dev);
2155
2156 if (!serial)
2157 return -ENODEV;
2158
2159 /* If it is not the MUX port fill in and submit a bulk urb (already
2160 * allocated in hso_serial_start) */
2161 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2162 for (i = 0; i < serial->num_rx_urbs; i++) {
2163 usb_fill_bulk_urb(serial->rx_urb[i],
2164 serial->parent->usb,
2165 usb_rcvbulkpipe(serial->parent->usb,
2166 serial->in_endp->
2167 bEndpointAddress &
2168 0x7F),
2169 serial->rx_data[i],
2170 serial->rx_data_length,
2171 hso_std_serial_read_bulk_callback,
2172 serial);
2173 result = usb_submit_urb(serial->rx_urb[i], flags);
2174 if (result) {
2175 dev_warn(&serial->parent->usb->dev,
2176 "Failed to submit urb - res %d\n",
2177 result);
2178 break;
2179 }
2180 }
2181 } else {
2182 mutex_lock(&serial->shared_int->shared_int_lock);
2183 if (!serial->shared_int->use_count) {
2184 result =
2185 hso_mux_submit_intr_urb(serial->shared_int,
2186 hso_dev->usb, flags);
2187 }
2188 serial->shared_int->use_count++;
2189 mutex_unlock(&serial->shared_int->shared_int_lock);
2190 }
2191 if (serial->tiocmget)
2192 tiocmget_submit_urb(serial,
2193 serial->tiocmget,
2194 serial->parent->usb);
2195 return result;
2196}
2197
2198static int hso_stop_serial_device(struct hso_device *hso_dev)
2199{
2200 int i;
2201 struct hso_serial *serial = dev2ser(hso_dev);
2202 struct hso_tiocmget *tiocmget;
2203
2204 if (!serial)
2205 return -ENODEV;
2206
2207 for (i = 0; i < serial->num_rx_urbs; i++) {
2208 if (serial->rx_urb[i]) {
2209 usb_kill_urb(serial->rx_urb[i]);
2210 serial->rx_urb_filled[i] = 0;
2211 }
2212 }
2213 serial->curr_rx_urb_idx = 0;
2214
2215 if (serial->tx_urb)
2216 usb_kill_urb(serial->tx_urb);
2217
2218 if (serial->shared_int) {
2219 mutex_lock(&serial->shared_int->shared_int_lock);
2220 if (serial->shared_int->use_count &&
2221 (--serial->shared_int->use_count == 0)) {
2222 struct urb *urb;
2223
2224 urb = serial->shared_int->shared_intr_urb;
2225 if (urb)
2226 usb_kill_urb(urb);
2227 }
2228 mutex_unlock(&serial->shared_int->shared_int_lock);
2229 }
2230 tiocmget = serial->tiocmget;
2231 if (tiocmget) {
2232 wake_up_interruptible(&tiocmget->waitq);
2233 usb_kill_urb(tiocmget->urb);
2234 }
2235
2236 return 0;
2237}
2238
2239static void hso_serial_tty_unregister(struct hso_serial *serial)
2240{
2241 tty_unregister_device(tty_drv, serial->minor);
2242}
2243
2244static void hso_serial_common_free(struct hso_serial *serial)
2245{
2246 int i;
2247
2248 for (i = 0; i < serial->num_rx_urbs; i++) {
2249 /* unlink and free RX URB */
2250 usb_free_urb(serial->rx_urb[i]);
2251 /* free the RX buffer */
2252 kfree(serial->rx_data[i]);
2253 }
2254
2255 /* unlink and free TX URB */
2256 usb_free_urb(serial->tx_urb);
2257 kfree(serial->tx_buffer);
2258 kfree(serial->tx_data);
2259 tty_port_destroy(&serial->port);
2260}
2261
2262static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2263 int rx_size, int tx_size)
2264{
2265 int minor;
2266 int i;
2267
2268 tty_port_init(&serial->port);
2269
2270 minor = get_free_serial_index();
2271 if (minor < 0)
2272 goto exit;
2273
2274 /* register our minor number */
2275 serial->parent->dev = tty_port_register_device_attr(&serial->port,
2276 tty_drv, minor, &serial->parent->interface->dev,
2277 serial->parent, hso_serial_dev_groups);
2278
2279 /* fill in specific data for later use */
2280 serial->minor = minor;
2281 serial->magic = HSO_SERIAL_MAGIC;
2282 spin_lock_init(&serial->serial_lock);
2283 serial->num_rx_urbs = num_urbs;
2284
2285 /* RX, allocate urb and initialize */
2286
2287 /* prepare our RX buffer */
2288 serial->rx_data_length = rx_size;
2289 for (i = 0; i < serial->num_rx_urbs; i++) {
2290 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2291 if (!serial->rx_urb[i])
2292 goto exit;
2293 serial->rx_urb[i]->transfer_buffer = NULL;
2294 serial->rx_urb[i]->transfer_buffer_length = 0;
2295 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2296 GFP_KERNEL);
2297 if (!serial->rx_data[i])
2298 goto exit;
2299 }
2300
2301 /* TX, allocate urb and initialize */
2302 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2303 if (!serial->tx_urb)
2304 goto exit;
2305 serial->tx_urb->transfer_buffer = NULL;
2306 serial->tx_urb->transfer_buffer_length = 0;
2307 /* prepare our TX buffer */
2308 serial->tx_data_count = 0;
2309 serial->tx_buffer_count = 0;
2310 serial->tx_data_length = tx_size;
2311 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2312 if (!serial->tx_data)
2313 goto exit;
2314
2315 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2316 if (!serial->tx_buffer)
2317 goto exit;
2318
2319 return 0;
2320exit:
2321 hso_serial_tty_unregister(serial);
2322 hso_serial_common_free(serial);
2323 return -1;
2324}
2325
2326/* Creates a general hso device */
2327static struct hso_device *hso_create_device(struct usb_interface *intf,
2328 int port_spec)
2329{
2330 struct hso_device *hso_dev;
2331
2332 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2333 if (!hso_dev)
2334 return NULL;
2335
2336 hso_dev->port_spec = port_spec;
2337 hso_dev->usb = interface_to_usbdev(intf);
2338 hso_dev->interface = intf;
2339 kref_init(&hso_dev->ref);
2340 mutex_init(&hso_dev->mutex);
2341
2342 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2343 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2344
2345 return hso_dev;
2346}
2347
2348/* Removes a network device in the network device table */
2349static int remove_net_device(struct hso_device *hso_dev)
2350{
2351 int i;
2352
2353 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2354 if (network_table[i] == hso_dev) {
2355 network_table[i] = NULL;
2356 break;
2357 }
2358 }
2359 if (i == HSO_MAX_NET_DEVICES)
2360 return -1;
2361 return 0;
2362}
2363
2364/* Frees our network device */
2365static void hso_free_net_device(struct hso_device *hso_dev)
2366{
2367 int i;
2368 struct hso_net *hso_net = dev2net(hso_dev);
2369
2370 if (!hso_net)
2371 return;
2372
2373 remove_net_device(hso_net->parent);
2374
2375 if (hso_net->net)
2376 unregister_netdev(hso_net->net);
2377
2378 /* start freeing */
2379 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2380 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2381 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2382 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2383 }
2384 usb_free_urb(hso_net->mux_bulk_tx_urb);
2385 kfree(hso_net->mux_bulk_tx_buf);
2386 hso_net->mux_bulk_tx_buf = NULL;
2387
2388 if (hso_net->net)
2389 free_netdev(hso_net->net);
2390
2391 kfree(hso_dev);
2392}
2393
2394static const struct net_device_ops hso_netdev_ops = {
2395 .ndo_open = hso_net_open,
2396 .ndo_stop = hso_net_close,
2397 .ndo_start_xmit = hso_net_start_xmit,
2398 .ndo_tx_timeout = hso_net_tx_timeout,
2399};
2400
2401/* initialize the network interface */
2402static void hso_net_init(struct net_device *net)
2403{
2404 struct hso_net *hso_net = netdev_priv(net);
2405
2406 hso_dbg(0x1, "sizeof hso_net is %zu\n", sizeof(*hso_net));
2407
2408 /* fill in the other fields */
2409 net->netdev_ops = &hso_netdev_ops;
2410 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2411 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2412 net->type = ARPHRD_NONE;
2413 net->mtu = DEFAULT_MTU - 14;
2414 net->tx_queue_len = 10;
2415 net->ethtool_ops = &ops;
2416
2417 /* and initialize the semaphore */
2418 spin_lock_init(&hso_net->net_lock);
2419}
2420
2421/* Adds a network device in the network device table */
2422static int add_net_device(struct hso_device *hso_dev)
2423{
2424 int i;
2425
2426 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2427 if (network_table[i] == NULL) {
2428 network_table[i] = hso_dev;
2429 break;
2430 }
2431 }
2432 if (i == HSO_MAX_NET_DEVICES)
2433 return -1;
2434 return 0;
2435}
2436
2437static int hso_rfkill_set_block(void *data, bool blocked)
2438{
2439 struct hso_device *hso_dev = data;
2440 int enabled = !blocked;
2441 int rv;
2442
2443 mutex_lock(&hso_dev->mutex);
2444 if (hso_dev->usb_gone)
2445 rv = 0;
2446 else
2447 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2448 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2449 USB_CTRL_SET_TIMEOUT);
2450 mutex_unlock(&hso_dev->mutex);
2451 return rv;
2452}
2453
2454static const struct rfkill_ops hso_rfkill_ops = {
2455 .set_block = hso_rfkill_set_block,
2456};
2457
2458/* Creates and sets up everything for rfkill */
2459static void hso_create_rfkill(struct hso_device *hso_dev,
2460 struct usb_interface *interface)
2461{
2462 struct hso_net *hso_net = dev2net(hso_dev);
2463 struct device *dev = &hso_net->net->dev;
2464 static u32 rfkill_counter;
2465
2466 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d",
2467 rfkill_counter++);
2468
2469 hso_net->rfkill = rfkill_alloc(hso_net->name,
2470 &interface_to_usbdev(interface)->dev,
2471 RFKILL_TYPE_WWAN,
2472 &hso_rfkill_ops, hso_dev);
2473 if (!hso_net->rfkill) {
2474 dev_err(dev, "%s - Out of memory\n", __func__);
2475 return;
2476 }
2477 if (rfkill_register(hso_net->rfkill) < 0) {
2478 rfkill_destroy(hso_net->rfkill);
2479 hso_net->rfkill = NULL;
2480 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2481 return;
2482 }
2483}
2484
2485static struct device_type hso_type = {
2486 .name = "wwan",
2487};
2488
2489/* Creates our network device */
2490static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2491 int port_spec)
2492{
2493 int result, i;
2494 struct net_device *net;
2495 struct hso_net *hso_net;
2496 struct hso_device *hso_dev;
2497
2498 hso_dev = hso_create_device(interface, port_spec);
2499 if (!hso_dev)
2500 return NULL;
2501
2502 /* allocate our network device, then we can put in our private data */
2503 /* call hso_net_init to do the basic initialization */
2504 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN,
2505 hso_net_init);
2506 if (!net) {
2507 dev_err(&interface->dev, "Unable to create ethernet device\n");
2508 goto exit;
2509 }
2510
2511 hso_net = netdev_priv(net);
2512
2513 hso_dev->port_data.dev_net = hso_net;
2514 hso_net->net = net;
2515 hso_net->parent = hso_dev;
2516
2517 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2518 USB_DIR_IN);
2519 if (!hso_net->in_endp) {
2520 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2521 goto exit;
2522 }
2523 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2524 USB_DIR_OUT);
2525 if (!hso_net->out_endp) {
2526 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2527 goto exit;
2528 }
2529 SET_NETDEV_DEV(net, &interface->dev);
2530 SET_NETDEV_DEVTYPE(net, &hso_type);
2531
2532 /* start allocating */
2533 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2534 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2535 if (!hso_net->mux_bulk_rx_urb_pool[i])
2536 goto exit;
2537 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2538 GFP_KERNEL);
2539 if (!hso_net->mux_bulk_rx_buf_pool[i])
2540 goto exit;
2541 }
2542 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2543 if (!hso_net->mux_bulk_tx_urb)
2544 goto exit;
2545 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2546 if (!hso_net->mux_bulk_tx_buf)
2547 goto exit;
2548
2549 add_net_device(hso_dev);
2550
2551 /* registering our net device */
2552 result = register_netdev(net);
2553 if (result) {
2554 dev_err(&interface->dev, "Failed to register device\n");
2555 goto exit;
2556 }
2557
2558 hso_log_port(hso_dev);
2559
2560 hso_create_rfkill(hso_dev, interface);
2561
2562 return hso_dev;
2563exit:
2564 hso_free_net_device(hso_dev);
2565 return NULL;
2566}
2567
2568static void hso_free_tiomget(struct hso_serial *serial)
2569{
2570 struct hso_tiocmget *tiocmget;
2571 if (!serial)
2572 return;
2573 tiocmget = serial->tiocmget;
2574 if (tiocmget) {
2575 usb_free_urb(tiocmget->urb);
2576 tiocmget->urb = NULL;
2577 serial->tiocmget = NULL;
2578 kfree(tiocmget);
2579 }
2580}
2581
2582/* Frees an AT channel ( goes for both mux and non-mux ) */
2583static void hso_free_serial_device(struct hso_device *hso_dev)
2584{
2585 struct hso_serial *serial = dev2ser(hso_dev);
2586
2587 if (!serial)
2588 return;
2589
2590 hso_serial_common_free(serial);
2591
2592 if (serial->shared_int) {
2593 mutex_lock(&serial->shared_int->shared_int_lock);
2594 if (--serial->shared_int->ref_count == 0)
2595 hso_free_shared_int(serial->shared_int);
2596 else
2597 mutex_unlock(&serial->shared_int->shared_int_lock);
2598 }
2599 hso_free_tiomget(serial);
2600 kfree(serial);
2601 kfree(hso_dev);
2602}
2603
2604/* Creates a bulk AT channel */
2605static struct hso_device *hso_create_bulk_serial_device(
2606 struct usb_interface *interface, int port)
2607{
2608 struct hso_device *hso_dev;
2609 struct hso_serial *serial;
2610 int num_urbs;
2611 struct hso_tiocmget *tiocmget;
2612
2613 hso_dev = hso_create_device(interface, port);
2614 if (!hso_dev)
2615 return NULL;
2616
2617 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2618 if (!serial)
2619 goto exit;
2620
2621 serial->parent = hso_dev;
2622 hso_dev->port_data.dev_serial = serial;
2623
2624 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2625 num_urbs = 2;
2626 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2627 GFP_KERNEL);
2628 /* it isn't going to break our heart if serial->tiocmget
2629 * allocation fails don't bother checking this.
2630 */
2631 if (serial->tiocmget) {
2632 tiocmget = serial->tiocmget;
2633 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2634 if (tiocmget->urb) {
2635 mutex_init(&tiocmget->mutex);
2636 init_waitqueue_head(&tiocmget->waitq);
2637 tiocmget->endp = hso_get_ep(
2638 interface,
2639 USB_ENDPOINT_XFER_INT,
2640 USB_DIR_IN);
2641 } else
2642 hso_free_tiomget(serial);
2643 }
2644 }
2645 else
2646 num_urbs = 1;
2647
2648 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2649 BULK_URB_TX_SIZE))
2650 goto exit;
2651
2652 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2653 USB_DIR_IN);
2654 if (!serial->in_endp) {
2655 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2656 goto exit2;
2657 }
2658
2659 if (!
2660 (serial->out_endp =
2661 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2662 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2663 goto exit2;
2664 }
2665
2666 serial->write_data = hso_std_serial_write_data;
2667
2668 /* and record this serial */
2669 set_serial_by_index(serial->minor, serial);
2670
2671 /* setup the proc dirs and files if needed */
2672 hso_log_port(hso_dev);
2673
2674 /* done, return it */
2675 return hso_dev;
2676
2677exit2:
2678 hso_serial_tty_unregister(serial);
2679 hso_serial_common_free(serial);
2680exit:
2681 hso_free_tiomget(serial);
2682 kfree(serial);
2683 kfree(hso_dev);
2684 return NULL;
2685}
2686
2687/* Creates a multiplexed AT channel */
2688static
2689struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2690 int port,
2691 struct hso_shared_int *mux)
2692{
2693 struct hso_device *hso_dev;
2694 struct hso_serial *serial;
2695 int port_spec;
2696
2697 port_spec = HSO_INTF_MUX;
2698 port_spec &= ~HSO_PORT_MASK;
2699
2700 port_spec |= hso_mux_to_port(port);
2701 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2702 return NULL;
2703
2704 hso_dev = hso_create_device(interface, port_spec);
2705 if (!hso_dev)
2706 return NULL;
2707
2708 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2709 if (!serial)
2710 goto exit;
2711
2712 hso_dev->port_data.dev_serial = serial;
2713 serial->parent = hso_dev;
2714
2715 if (hso_serial_common_create
2716 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2717 goto exit;
2718
2719 serial->tx_data_length--;
2720 serial->write_data = hso_mux_serial_write_data;
2721
2722 serial->shared_int = mux;
2723 mutex_lock(&serial->shared_int->shared_int_lock);
2724 serial->shared_int->ref_count++;
2725 mutex_unlock(&serial->shared_int->shared_int_lock);
2726
2727 /* and record this serial */
2728 set_serial_by_index(serial->minor, serial);
2729
2730 /* setup the proc dirs and files if needed */
2731 hso_log_port(hso_dev);
2732
2733 /* done, return it */
2734 return hso_dev;
2735
2736exit:
2737 if (serial) {
2738 tty_unregister_device(tty_drv, serial->minor);
2739 kfree(serial);
2740 }
2741 kfree(hso_dev);
2742 return NULL;
2743
2744}
2745
2746static void hso_free_shared_int(struct hso_shared_int *mux)
2747{
2748 usb_free_urb(mux->shared_intr_urb);
2749 kfree(mux->shared_intr_buf);
2750 mutex_unlock(&mux->shared_int_lock);
2751 kfree(mux);
2752}
2753
2754static
2755struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2756{
2757 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2758
2759 if (!mux)
2760 return NULL;
2761
2762 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2763 USB_DIR_IN);
2764 if (!mux->intr_endp) {
2765 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2766 goto exit;
2767 }
2768
2769 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2770 if (!mux->shared_intr_urb)
2771 goto exit;
2772 mux->shared_intr_buf =
2773 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2774 GFP_KERNEL);
2775 if (!mux->shared_intr_buf)
2776 goto exit;
2777
2778 mutex_init(&mux->shared_int_lock);
2779
2780 return mux;
2781
2782exit:
2783 kfree(mux->shared_intr_buf);
2784 usb_free_urb(mux->shared_intr_urb);
2785 kfree(mux);
2786 return NULL;
2787}
2788
2789/* Gets the port spec for a certain interface */
2790static int hso_get_config_data(struct usb_interface *interface)
2791{
2792 struct usb_device *usbdev = interface_to_usbdev(interface);
2793 u8 *config_data = kmalloc(17, GFP_KERNEL);
2794 u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2795 s32 result;
2796
2797 if (!config_data)
2798 return -ENOMEM;
2799 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2800 0x86, 0xC0, 0, 0, config_data, 17,
2801 USB_CTRL_SET_TIMEOUT) != 0x11) {
2802 kfree(config_data);
2803 return -EIO;
2804 }
2805
2806 switch (config_data[if_num]) {
2807 case 0x0:
2808 result = 0;
2809 break;
2810 case 0x1:
2811 result = HSO_PORT_DIAG;
2812 break;
2813 case 0x2:
2814 result = HSO_PORT_GPS;
2815 break;
2816 case 0x3:
2817 result = HSO_PORT_GPS_CONTROL;
2818 break;
2819 case 0x4:
2820 result = HSO_PORT_APP;
2821 break;
2822 case 0x5:
2823 result = HSO_PORT_APP2;
2824 break;
2825 case 0x6:
2826 result = HSO_PORT_CONTROL;
2827 break;
2828 case 0x7:
2829 result = HSO_PORT_NETWORK;
2830 break;
2831 case 0x8:
2832 result = HSO_PORT_MODEM;
2833 break;
2834 case 0x9:
2835 result = HSO_PORT_MSD;
2836 break;
2837 case 0xa:
2838 result = HSO_PORT_PCSC;
2839 break;
2840 case 0xb:
2841 result = HSO_PORT_VOICE;
2842 break;
2843 default:
2844 result = 0;
2845 }
2846
2847 if (result)
2848 result |= HSO_INTF_BULK;
2849
2850 if (config_data[16] & 0x1)
2851 result |= HSO_INFO_CRC_BUG;
2852
2853 kfree(config_data);
2854 return result;
2855}
2856
2857/* called once for each interface upon device insertion */
2858static int hso_probe(struct usb_interface *interface,
2859 const struct usb_device_id *id)
2860{
2861 int mux, i, if_num, port_spec;
2862 unsigned char port_mask;
2863 struct hso_device *hso_dev = NULL;
2864 struct hso_shared_int *shared_int;
2865 struct hso_device *tmp_dev = NULL;
2866
2867 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2868 dev_err(&interface->dev, "Not our interface\n");
2869 return -ENODEV;
2870 }
2871
2872 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2873
2874 /* Get the interface/port specification from either driver_info or from
2875 * the device itself */
2876 if (id->driver_info)
2877 port_spec = ((u32 *)(id->driver_info))[if_num];
2878 else
2879 port_spec = hso_get_config_data(interface);
2880
2881 /* Check if we need to switch to alt interfaces prior to port
2882 * configuration */
2883 if (interface->num_altsetting > 1)
2884 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2885 interface->needs_remote_wakeup = 1;
2886
2887 /* Allocate new hso device(s) */
2888 switch (port_spec & HSO_INTF_MASK) {
2889 case HSO_INTF_MUX:
2890 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2891 /* Create the network device */
2892 if (!disable_net) {
2893 hso_dev = hso_create_net_device(interface,
2894 port_spec);
2895 if (!hso_dev)
2896 goto exit;
2897 tmp_dev = hso_dev;
2898 }
2899 }
2900
2901 if (hso_get_mux_ports(interface, &port_mask))
2902 /* TODO: de-allocate everything */
2903 goto exit;
2904
2905 shared_int = hso_create_shared_int(interface);
2906 if (!shared_int)
2907 goto exit;
2908
2909 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2910 if (port_mask & i) {
2911 hso_dev = hso_create_mux_serial_device(
2912 interface, i, shared_int);
2913 if (!hso_dev)
2914 goto exit;
2915 }
2916 }
2917
2918 if (tmp_dev)
2919 hso_dev = tmp_dev;
2920 break;
2921
2922 case HSO_INTF_BULK:
2923 /* It's a regular bulk interface */
2924 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2925 if (!disable_net)
2926 hso_dev =
2927 hso_create_net_device(interface, port_spec);
2928 } else {
2929 hso_dev =
2930 hso_create_bulk_serial_device(interface, port_spec);
2931 }
2932 if (!hso_dev)
2933 goto exit;
2934 break;
2935 default:
2936 goto exit;
2937 }
2938
2939 /* save our data pointer in this device */
2940 usb_set_intfdata(interface, hso_dev);
2941
2942 /* done */
2943 return 0;
2944exit:
2945 hso_free_interface(interface);
2946 return -ENODEV;
2947}
2948
2949/* device removed, cleaning up */
2950static void hso_disconnect(struct usb_interface *interface)
2951{
2952 hso_free_interface(interface);
2953
2954 /* remove reference of our private data */
2955 usb_set_intfdata(interface, NULL);
2956}
2957
2958static void async_get_intf(struct work_struct *data)
2959{
2960 struct hso_device *hso_dev =
2961 container_of(data, struct hso_device, async_get_intf);
2962 usb_autopm_get_interface(hso_dev->interface);
2963}
2964
2965static void async_put_intf(struct work_struct *data)
2966{
2967 struct hso_device *hso_dev =
2968 container_of(data, struct hso_device, async_put_intf);
2969 usb_autopm_put_interface(hso_dev->interface);
2970}
2971
2972static int hso_get_activity(struct hso_device *hso_dev)
2973{
2974 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2975 if (!hso_dev->is_active) {
2976 hso_dev->is_active = 1;
2977 schedule_work(&hso_dev->async_get_intf);
2978 }
2979 }
2980
2981 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
2982 return -EAGAIN;
2983
2984 usb_mark_last_busy(hso_dev->usb);
2985
2986 return 0;
2987}
2988
2989static int hso_put_activity(struct hso_device *hso_dev)
2990{
2991 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
2992 if (hso_dev->is_active) {
2993 hso_dev->is_active = 0;
2994 schedule_work(&hso_dev->async_put_intf);
2995 return -EAGAIN;
2996 }
2997 }
2998 hso_dev->is_active = 0;
2999 return 0;
3000}
3001
3002/* called by kernel when we need to suspend device */
3003static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3004{
3005 int i, result;
3006
3007 /* Stop all serial ports */
3008 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3009 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3010 result = hso_stop_serial_device(serial_table[i]);
3011 if (result)
3012 goto out;
3013 }
3014 }
3015
3016 /* Stop all network ports */
3017 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3018 if (network_table[i] &&
3019 (network_table[i]->interface == iface)) {
3020 result = hso_stop_net_device(network_table[i]);
3021 if (result)
3022 goto out;
3023 }
3024 }
3025
3026out:
3027 return 0;
3028}
3029
3030/* called by kernel when we need to resume device */
3031static int hso_resume(struct usb_interface *iface)
3032{
3033 int i, result = 0;
3034 struct hso_net *hso_net;
3035
3036 /* Start all serial ports */
3037 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3038 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3039 if (dev2ser(serial_table[i])->port.count) {
3040 result =
3041 hso_start_serial_device(serial_table[i], GFP_NOIO);
3042 hso_kick_transmit(dev2ser(serial_table[i]));
3043 if (result)
3044 goto out;
3045 }
3046 }
3047 }
3048
3049 /* Start all network ports */
3050 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3051 if (network_table[i] &&
3052 (network_table[i]->interface == iface)) {
3053 hso_net = dev2net(network_table[i]);
3054 if (hso_net->flags & IFF_UP) {
3055 /* First transmit any lingering data,
3056 then restart the device. */
3057 if (hso_net->skb_tx_buf) {
3058 dev_dbg(&iface->dev,
3059 "Transmitting"
3060 " lingering data\n");
3061 hso_net_start_xmit(hso_net->skb_tx_buf,
3062 hso_net->net);
3063 hso_net->skb_tx_buf = NULL;
3064 }
3065 result = hso_start_net_device(network_table[i]);
3066 if (result)
3067 goto out;
3068 }
3069 }
3070 }
3071
3072out:
3073 return result;
3074}
3075
3076static void hso_serial_ref_free(struct kref *ref)
3077{
3078 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3079
3080 hso_free_serial_device(hso_dev);
3081}
3082
3083static void hso_free_interface(struct usb_interface *interface)
3084{
3085 struct hso_serial *serial;
3086 int i;
3087
3088 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3089 if (serial_table[i] &&
3090 (serial_table[i]->interface == interface)) {
3091 serial = dev2ser(serial_table[i]);
3092 tty_port_tty_hangup(&serial->port, false);
3093 mutex_lock(&serial->parent->mutex);
3094 serial->parent->usb_gone = 1;
3095 mutex_unlock(&serial->parent->mutex);
3096 cancel_work_sync(&serial_table[i]->async_put_intf);
3097 cancel_work_sync(&serial_table[i]->async_get_intf);
3098 hso_serial_tty_unregister(serial);
3099 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3100 set_serial_by_index(i, NULL);
3101 }
3102 }
3103
3104 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3105 if (network_table[i] &&
3106 (network_table[i]->interface == interface)) {
3107 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3108 /* hso_stop_net_device doesn't stop the net queue since
3109 * traffic needs to start it again when suspended */
3110 netif_stop_queue(dev2net(network_table[i])->net);
3111 hso_stop_net_device(network_table[i]);
3112 cancel_work_sync(&network_table[i]->async_put_intf);
3113 cancel_work_sync(&network_table[i]->async_get_intf);
3114 if (rfk) {
3115 rfkill_unregister(rfk);
3116 rfkill_destroy(rfk);
3117 }
3118 hso_free_net_device(network_table[i]);
3119 }
3120 }
3121}
3122
3123/* Helper functions */
3124
3125/* Get the endpoint ! */
3126static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3127 int type, int dir)
3128{
3129 int i;
3130 struct usb_host_interface *iface = intf->cur_altsetting;
3131 struct usb_endpoint_descriptor *endp;
3132
3133 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3134 endp = &iface->endpoint[i].desc;
3135 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3136 (usb_endpoint_type(endp) == type))
3137 return endp;
3138 }
3139
3140 return NULL;
3141}
3142
3143/* Get the byte that describes which ports are enabled */
3144static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3145{
3146 int i;
3147 struct usb_host_interface *iface = intf->cur_altsetting;
3148
3149 if (iface->extralen == 3) {
3150 *ports = iface->extra[2];
3151 return 0;
3152 }
3153
3154 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3155 if (iface->endpoint[i].extralen == 3) {
3156 *ports = iface->endpoint[i].extra[2];
3157 return 0;
3158 }
3159 }
3160
3161 return -1;
3162}
3163
3164/* interrupt urb needs to be submitted, used for serial read of muxed port */
3165static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3166 struct usb_device *usb, gfp_t gfp)
3167{
3168 int result;
3169
3170 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3171 usb_rcvintpipe(usb,
3172 shared_int->intr_endp->bEndpointAddress & 0x7F),
3173 shared_int->shared_intr_buf,
3174 1,
3175 intr_callback, shared_int,
3176 shared_int->intr_endp->bInterval);
3177
3178 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3179 if (result)
3180 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3181 result);
3182
3183 return result;
3184}
3185
3186/* operations setup of the serial interface */
3187static const struct tty_operations hso_serial_ops = {
3188 .open = hso_serial_open,
3189 .close = hso_serial_close,
3190 .write = hso_serial_write,
3191 .write_room = hso_serial_write_room,
3192 .cleanup = hso_serial_cleanup,
3193 .ioctl = hso_serial_ioctl,
3194 .set_termios = hso_serial_set_termios,
3195 .chars_in_buffer = hso_serial_chars_in_buffer,
3196 .tiocmget = hso_serial_tiocmget,
3197 .tiocmset = hso_serial_tiocmset,
3198 .get_icount = hso_get_count,
3199 .unthrottle = hso_unthrottle
3200};
3201
3202static struct usb_driver hso_driver = {
3203 .name = driver_name,
3204 .probe = hso_probe,
3205 .disconnect = hso_disconnect,
3206 .id_table = hso_ids,
3207 .suspend = hso_suspend,
3208 .resume = hso_resume,
3209 .reset_resume = hso_resume,
3210 .supports_autosuspend = 1,
3211 .disable_hub_initiated_lpm = 1,
3212};
3213
3214static int __init hso_init(void)
3215{
3216 int i;
3217 int result;
3218
3219 /* put it in the log */
3220 pr_info("%s\n", version);
3221
3222 /* Initialise the serial table semaphore and table */
3223 spin_lock_init(&serial_table_lock);
3224 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3225 serial_table[i] = NULL;
3226
3227 /* allocate our driver using the proper amount of supported minors */
3228 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3229 if (!tty_drv)
3230 return -ENOMEM;
3231
3232 /* fill in all needed values */
3233 tty_drv->driver_name = driver_name;
3234 tty_drv->name = tty_filename;
3235
3236 /* if major number is provided as parameter, use that one */
3237 if (tty_major)
3238 tty_drv->major = tty_major;
3239
3240 tty_drv->minor_start = 0;
3241 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3242 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3243 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3244 tty_drv->init_termios = tty_std_termios;
3245 hso_init_termios(&tty_drv->init_termios);
3246 tty_set_operations(tty_drv, &hso_serial_ops);
3247
3248 /* register the tty driver */
3249 result = tty_register_driver(tty_drv);
3250 if (result) {
3251 pr_err("%s - tty_register_driver failed(%d)\n",
3252 __func__, result);
3253 goto err_free_tty;
3254 }
3255
3256 /* register this module as an usb driver */
3257 result = usb_register(&hso_driver);
3258 if (result) {
3259 pr_err("Could not register hso driver - error: %d\n", result);
3260 goto err_unreg_tty;
3261 }
3262
3263 /* done */
3264 return 0;
3265err_unreg_tty:
3266 tty_unregister_driver(tty_drv);
3267err_free_tty:
3268 put_tty_driver(tty_drv);
3269 return result;
3270}
3271
3272static void __exit hso_exit(void)
3273{
3274 pr_info("unloaded\n");
3275
3276 tty_unregister_driver(tty_drv);
3277 /* deregister the usb driver */
3278 usb_deregister(&hso_driver);
3279 put_tty_driver(tty_drv);
3280}
3281
3282/* Module definitions */
3283module_init(hso_init);
3284module_exit(hso_exit);
3285
3286MODULE_AUTHOR(MOD_AUTHOR);
3287MODULE_DESCRIPTION(MOD_DESCRIPTION);
3288MODULE_LICENSE("GPL");
3289
3290/* change the debug level (eg: insmod hso.ko debug=0x04) */
3291MODULE_PARM_DESC(debug, "debug level mask [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3292module_param(debug, int, 0644);
3293
3294/* set the major tty number (eg: insmod hso.ko tty_major=245) */
3295MODULE_PARM_DESC(tty_major, "Set the major tty number");
3296module_param(tty_major, int, 0644);
3297
3298/* disable network interface (eg: insmod hso.ko disable_net=1) */
3299MODULE_PARM_DESC(disable_net, "Disable the network interface");
3300module_param(disable_net, int, 0644);
1/******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
6 * Filip Aben <f.aben@option.com>
7 * Denis Joseph Barrow <d.barow@option.com>
8 * Jan Dumon <j.dumon@option.com>
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 *
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.
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/tty.h>
62#include <linux/tty_driver.h>
63#include <linux/tty_flip.h>
64#include <linux/kmod.h>
65#include <linux/rfkill.h>
66#include <linux/ip.h>
67#include <linux/uaccess.h>
68#include <linux/usb/cdc.h>
69#include <net/arp.h>
70#include <asm/byteorder.h>
71#include <linux/serial_core.h>
72#include <linux/serial.h>
73
74
75#define MOD_AUTHOR "Option Wireless"
76#define MOD_DESCRIPTION "USB High Speed Option driver"
77#define MOD_LICENSE "GPL"
78
79#define HSO_MAX_NET_DEVICES 10
80#define HSO__MAX_MTU 2048
81#define DEFAULT_MTU 1500
82#define DEFAULT_MRU 1500
83
84#define CTRL_URB_RX_SIZE 1024
85#define CTRL_URB_TX_SIZE 64
86
87#define BULK_URB_RX_SIZE 4096
88#define BULK_URB_TX_SIZE 8192
89
90#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
91#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
92#define MUX_BULK_RX_BUF_COUNT 4
93#define USB_TYPE_OPTION_VENDOR 0x20
94
95/* These definitions are used with the struct hso_net flags element */
96/* - use *_bit operations on it. (bit indices not values.) */
97#define HSO_NET_RUNNING 0
98
99#define HSO_NET_TX_TIMEOUT (HZ*10)
100
101#define HSO_SERIAL_MAGIC 0x48534f31
102
103/* Number of ttys to handle */
104#define HSO_SERIAL_TTY_MINORS 256
105
106#define MAX_RX_URBS 2
107
108/*****************************************************************************/
109/* Debugging functions */
110/*****************************************************************************/
111#define D__(lvl_, fmt, arg...) \
112 do { \
113 printk(lvl_ "[%d:%s]: " fmt "\n", \
114 __LINE__, __func__, ## arg); \
115 } while (0)
116
117#define D_(lvl, args...) \
118 do { \
119 if (lvl & debug) \
120 D__(KERN_INFO, args); \
121 } while (0)
122
123#define D1(args...) D_(0x01, ##args)
124#define D2(args...) D_(0x02, ##args)
125#define D3(args...) D_(0x04, ##args)
126#define D4(args...) D_(0x08, ##args)
127#define D5(args...) D_(0x10, ##args)
128
129/*****************************************************************************/
130/* Enumerators */
131/*****************************************************************************/
132enum pkt_parse_state {
133 WAIT_IP,
134 WAIT_DATA,
135 WAIT_SYNC
136};
137
138/*****************************************************************************/
139/* Structs */
140/*****************************************************************************/
141
142struct hso_shared_int {
143 struct usb_endpoint_descriptor *intr_endp;
144 void *shared_intr_buf;
145 struct urb *shared_intr_urb;
146 struct usb_device *usb;
147 int use_count;
148 int ref_count;
149 struct mutex shared_int_lock;
150};
151
152struct hso_net {
153 struct hso_device *parent;
154 struct net_device *net;
155 struct rfkill *rfkill;
156 char name[24];
157
158 struct usb_endpoint_descriptor *in_endp;
159 struct usb_endpoint_descriptor *out_endp;
160
161 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
162 struct urb *mux_bulk_tx_urb;
163 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
164 void *mux_bulk_tx_buf;
165
166 struct sk_buff *skb_rx_buf;
167 struct sk_buff *skb_tx_buf;
168
169 enum pkt_parse_state rx_parse_state;
170 spinlock_t net_lock;
171
172 unsigned short rx_buf_size;
173 unsigned short rx_buf_missing;
174 struct iphdr rx_ip_hdr;
175
176 unsigned long flags;
177};
178
179enum rx_ctrl_state{
180 RX_IDLE,
181 RX_SENT,
182 RX_PENDING
183};
184
185#define BM_REQUEST_TYPE (0xa1)
186#define B_NOTIFICATION (0x20)
187#define W_VALUE (0x0)
188#define W_LENGTH (0x2)
189
190#define B_OVERRUN (0x1<<6)
191#define B_PARITY (0x1<<5)
192#define B_FRAMING (0x1<<4)
193#define B_RING_SIGNAL (0x1<<3)
194#define B_BREAK (0x1<<2)
195#define B_TX_CARRIER (0x1<<1)
196#define B_RX_CARRIER (0x1<<0)
197
198struct hso_serial_state_notification {
199 u8 bmRequestType;
200 u8 bNotification;
201 u16 wValue;
202 u16 wIndex;
203 u16 wLength;
204 u16 UART_state_bitmap;
205} __packed;
206
207struct hso_tiocmget {
208 struct mutex mutex;
209 wait_queue_head_t waitq;
210 int intr_completed;
211 struct usb_endpoint_descriptor *endp;
212 struct urb *urb;
213 struct hso_serial_state_notification serial_state_notification;
214 u16 prev_UART_state_bitmap;
215 struct uart_icount icount;
216};
217
218
219struct hso_serial {
220 struct hso_device *parent;
221 int magic;
222 u8 minor;
223
224 struct hso_shared_int *shared_int;
225
226 /* rx/tx urb could be either a bulk urb or a control urb depending
227 on which serial port it is used on. */
228 struct urb *rx_urb[MAX_RX_URBS];
229 u8 num_rx_urbs;
230 u8 *rx_data[MAX_RX_URBS];
231 u16 rx_data_length; /* should contain allocated length */
232
233 struct urb *tx_urb;
234 u8 *tx_data;
235 u8 *tx_buffer;
236 u16 tx_data_length; /* should contain allocated length */
237 u16 tx_data_count;
238 u16 tx_buffer_count;
239 struct usb_ctrlrequest ctrl_req_tx;
240 struct usb_ctrlrequest ctrl_req_rx;
241
242 struct usb_endpoint_descriptor *in_endp;
243 struct usb_endpoint_descriptor *out_endp;
244
245 enum rx_ctrl_state rx_state;
246 u8 rts_state;
247 u8 dtr_state;
248 unsigned tx_urb_used:1;
249
250 struct tty_port port;
251 /* from usb_serial_port */
252 spinlock_t serial_lock;
253
254 int (*write_data) (struct hso_serial *serial);
255 struct hso_tiocmget *tiocmget;
256 /* Hacks required to get flow control
257 * working on the serial receive buffers
258 * so as not to drop characters on the floor.
259 */
260 int curr_rx_urb_idx;
261 u8 rx_urb_filled[MAX_RX_URBS];
262 struct tasklet_struct unthrottle_tasklet;
263};
264
265struct hso_device {
266 union {
267 struct hso_serial *dev_serial;
268 struct hso_net *dev_net;
269 } port_data;
270
271 u32 port_spec;
272
273 u8 is_active;
274 u8 usb_gone;
275 struct work_struct async_get_intf;
276 struct work_struct async_put_intf;
277
278 struct usb_device *usb;
279 struct usb_interface *interface;
280
281 struct device *dev;
282 struct kref ref;
283 struct mutex mutex;
284};
285
286/* Type of interface */
287#define HSO_INTF_MASK 0xFF00
288#define HSO_INTF_MUX 0x0100
289#define HSO_INTF_BULK 0x0200
290
291/* Type of port */
292#define HSO_PORT_MASK 0xFF
293#define HSO_PORT_NO_PORT 0x0
294#define HSO_PORT_CONTROL 0x1
295#define HSO_PORT_APP 0x2
296#define HSO_PORT_GPS 0x3
297#define HSO_PORT_PCSC 0x4
298#define HSO_PORT_APP2 0x5
299#define HSO_PORT_GPS_CONTROL 0x6
300#define HSO_PORT_MSD 0x7
301#define HSO_PORT_VOICE 0x8
302#define HSO_PORT_DIAG2 0x9
303#define HSO_PORT_DIAG 0x10
304#define HSO_PORT_MODEM 0x11
305#define HSO_PORT_NETWORK 0x12
306
307/* Additional device info */
308#define HSO_INFO_MASK 0xFF000000
309#define HSO_INFO_CRC_BUG 0x01000000
310
311/*****************************************************************************/
312/* Prototypes */
313/*****************************************************************************/
314/* Serial driver functions */
315static int hso_serial_tiocmset(struct tty_struct *tty,
316 unsigned int set, unsigned int clear);
317static void ctrl_callback(struct urb *urb);
318static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
319static void hso_kick_transmit(struct hso_serial *serial);
320/* Helper functions */
321static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
322 struct usb_device *usb, gfp_t gfp);
323static void handle_usb_error(int status, const char *function,
324 struct hso_device *hso_dev);
325static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
326 int type, int dir);
327static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
328static void hso_free_interface(struct usb_interface *intf);
329static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
330static int hso_stop_serial_device(struct hso_device *hso_dev);
331static int hso_start_net_device(struct hso_device *hso_dev);
332static void hso_free_shared_int(struct hso_shared_int *shared_int);
333static int hso_stop_net_device(struct hso_device *hso_dev);
334static void hso_serial_ref_free(struct kref *ref);
335static void hso_std_serial_read_bulk_callback(struct urb *urb);
336static int hso_mux_serial_read(struct hso_serial *serial);
337static void async_get_intf(struct work_struct *data);
338static void async_put_intf(struct work_struct *data);
339static int hso_put_activity(struct hso_device *hso_dev);
340static int hso_get_activity(struct hso_device *hso_dev);
341static void tiocmget_intr_callback(struct urb *urb);
342/*****************************************************************************/
343/* Helping functions */
344/*****************************************************************************/
345
346/* #define DEBUG */
347
348static inline struct hso_net *dev2net(struct hso_device *hso_dev)
349{
350 return hso_dev->port_data.dev_net;
351}
352
353static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
354{
355 return hso_dev->port_data.dev_serial;
356}
357
358/* Debugging functions */
359#ifdef DEBUG
360static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
361 unsigned int len)
362{
363 static char name[255];
364
365 sprintf(name, "hso[%d:%s]", line_count, func_name);
366 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
367}
368
369#define DUMP(buf_, len_) \
370 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
371
372#define DUMP1(buf_, len_) \
373 do { \
374 if (0x01 & debug) \
375 DUMP(buf_, len_); \
376 } while (0)
377#else
378#define DUMP(buf_, len_)
379#define DUMP1(buf_, len_)
380#endif
381
382/* module parameters */
383static int debug;
384static int tty_major;
385static int disable_net;
386
387/* driver info */
388static const char driver_name[] = "hso";
389static const char tty_filename[] = "ttyHS";
390static const char *version = __FILE__ ": " MOD_AUTHOR;
391/* the usb driver itself (registered in hso_init) */
392static struct usb_driver hso_driver;
393/* serial structures */
394static struct tty_driver *tty_drv;
395static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
396static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
397static spinlock_t serial_table_lock;
398
399static const s32 default_port_spec[] = {
400 HSO_INTF_MUX | HSO_PORT_NETWORK,
401 HSO_INTF_BULK | HSO_PORT_DIAG,
402 HSO_INTF_BULK | HSO_PORT_MODEM,
403 0
404};
405
406static const s32 icon321_port_spec[] = {
407 HSO_INTF_MUX | HSO_PORT_NETWORK,
408 HSO_INTF_BULK | HSO_PORT_DIAG2,
409 HSO_INTF_BULK | HSO_PORT_MODEM,
410 HSO_INTF_BULK | HSO_PORT_DIAG,
411 0
412};
413
414#define default_port_device(vendor, product) \
415 USB_DEVICE(vendor, product), \
416 .driver_info = (kernel_ulong_t)default_port_spec
417
418#define icon321_port_device(vendor, product) \
419 USB_DEVICE(vendor, product), \
420 .driver_info = (kernel_ulong_t)icon321_port_spec
421
422/* list of devices we support */
423static const struct usb_device_id hso_ids[] = {
424 {default_port_device(0x0af0, 0x6711)},
425 {default_port_device(0x0af0, 0x6731)},
426 {default_port_device(0x0af0, 0x6751)},
427 {default_port_device(0x0af0, 0x6771)},
428 {default_port_device(0x0af0, 0x6791)},
429 {default_port_device(0x0af0, 0x6811)},
430 {default_port_device(0x0af0, 0x6911)},
431 {default_port_device(0x0af0, 0x6951)},
432 {default_port_device(0x0af0, 0x6971)},
433 {default_port_device(0x0af0, 0x7011)},
434 {default_port_device(0x0af0, 0x7031)},
435 {default_port_device(0x0af0, 0x7051)},
436 {default_port_device(0x0af0, 0x7071)},
437 {default_port_device(0x0af0, 0x7111)},
438 {default_port_device(0x0af0, 0x7211)},
439 {default_port_device(0x0af0, 0x7251)},
440 {default_port_device(0x0af0, 0x7271)},
441 {default_port_device(0x0af0, 0x7311)},
442 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
443 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
444 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
445 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
446 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
447 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
448 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
449 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
450 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
451 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
452 {USB_DEVICE(0x0af0, 0x7701)},
453 {USB_DEVICE(0x0af0, 0x7706)},
454 {USB_DEVICE(0x0af0, 0x7801)},
455 {USB_DEVICE(0x0af0, 0x7901)},
456 {USB_DEVICE(0x0af0, 0x7A01)},
457 {USB_DEVICE(0x0af0, 0x7A05)},
458 {USB_DEVICE(0x0af0, 0x8200)},
459 {USB_DEVICE(0x0af0, 0x8201)},
460 {USB_DEVICE(0x0af0, 0x8300)},
461 {USB_DEVICE(0x0af0, 0x8302)},
462 {USB_DEVICE(0x0af0, 0x8304)},
463 {USB_DEVICE(0x0af0, 0x8400)},
464 {USB_DEVICE(0x0af0, 0x8600)},
465 {USB_DEVICE(0x0af0, 0x8800)},
466 {USB_DEVICE(0x0af0, 0x8900)},
467 {USB_DEVICE(0x0af0, 0x9000)},
468 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */
469 {USB_DEVICE(0x0af0, 0xd035)},
470 {USB_DEVICE(0x0af0, 0xd055)},
471 {USB_DEVICE(0x0af0, 0xd155)},
472 {USB_DEVICE(0x0af0, 0xd255)},
473 {USB_DEVICE(0x0af0, 0xd057)},
474 {USB_DEVICE(0x0af0, 0xd157)},
475 {USB_DEVICE(0x0af0, 0xd257)},
476 {USB_DEVICE(0x0af0, 0xd357)},
477 {USB_DEVICE(0x0af0, 0xd058)},
478 {USB_DEVICE(0x0af0, 0xc100)},
479 {}
480};
481MODULE_DEVICE_TABLE(usb, hso_ids);
482
483/* Sysfs attribute */
484static ssize_t hso_sysfs_show_porttype(struct device *dev,
485 struct device_attribute *attr,
486 char *buf)
487{
488 struct hso_device *hso_dev = dev_get_drvdata(dev);
489 char *port_name;
490
491 if (!hso_dev)
492 return 0;
493
494 switch (hso_dev->port_spec & HSO_PORT_MASK) {
495 case HSO_PORT_CONTROL:
496 port_name = "Control";
497 break;
498 case HSO_PORT_APP:
499 port_name = "Application";
500 break;
501 case HSO_PORT_APP2:
502 port_name = "Application2";
503 break;
504 case HSO_PORT_GPS:
505 port_name = "GPS";
506 break;
507 case HSO_PORT_GPS_CONTROL:
508 port_name = "GPS Control";
509 break;
510 case HSO_PORT_PCSC:
511 port_name = "PCSC";
512 break;
513 case HSO_PORT_DIAG:
514 port_name = "Diagnostic";
515 break;
516 case HSO_PORT_DIAG2:
517 port_name = "Diagnostic2";
518 break;
519 case HSO_PORT_MODEM:
520 port_name = "Modem";
521 break;
522 case HSO_PORT_NETWORK:
523 port_name = "Network";
524 break;
525 default:
526 port_name = "Unknown";
527 break;
528 }
529
530 return sprintf(buf, "%s\n", port_name);
531}
532static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
533
534static struct attribute *hso_serial_dev_attrs[] = {
535 &dev_attr_hsotype.attr,
536 NULL
537};
538
539ATTRIBUTE_GROUPS(hso_serial_dev);
540
541static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
542{
543 int idx;
544
545 for (idx = 0; idx < serial->num_rx_urbs; idx++)
546 if (serial->rx_urb[idx] == urb)
547 return idx;
548 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
549 return -1;
550}
551
552/* converts mux value to a port spec value */
553static u32 hso_mux_to_port(int mux)
554{
555 u32 result;
556
557 switch (mux) {
558 case 0x1:
559 result = HSO_PORT_CONTROL;
560 break;
561 case 0x2:
562 result = HSO_PORT_APP;
563 break;
564 case 0x4:
565 result = HSO_PORT_PCSC;
566 break;
567 case 0x8:
568 result = HSO_PORT_GPS;
569 break;
570 case 0x10:
571 result = HSO_PORT_APP2;
572 break;
573 default:
574 result = HSO_PORT_NO_PORT;
575 }
576 return result;
577}
578
579/* converts port spec value to a mux value */
580static u32 hso_port_to_mux(int port)
581{
582 u32 result;
583
584 switch (port & HSO_PORT_MASK) {
585 case HSO_PORT_CONTROL:
586 result = 0x0;
587 break;
588 case HSO_PORT_APP:
589 result = 0x1;
590 break;
591 case HSO_PORT_PCSC:
592 result = 0x2;
593 break;
594 case HSO_PORT_GPS:
595 result = 0x3;
596 break;
597 case HSO_PORT_APP2:
598 result = 0x4;
599 break;
600 default:
601 result = 0x0;
602 }
603 return result;
604}
605
606static struct hso_serial *get_serial_by_shared_int_and_type(
607 struct hso_shared_int *shared_int,
608 int mux)
609{
610 int i, port;
611
612 port = hso_mux_to_port(mux);
613
614 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
615 if (serial_table[i] &&
616 (dev2ser(serial_table[i])->shared_int == shared_int) &&
617 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
618 return dev2ser(serial_table[i]);
619 }
620 }
621
622 return NULL;
623}
624
625static struct hso_serial *get_serial_by_index(unsigned index)
626{
627 struct hso_serial *serial = NULL;
628 unsigned long flags;
629
630 spin_lock_irqsave(&serial_table_lock, flags);
631 if (serial_table[index])
632 serial = dev2ser(serial_table[index]);
633 spin_unlock_irqrestore(&serial_table_lock, flags);
634
635 return serial;
636}
637
638static int get_free_serial_index(void)
639{
640 int index;
641 unsigned long flags;
642
643 spin_lock_irqsave(&serial_table_lock, flags);
644 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
645 if (serial_table[index] == NULL) {
646 spin_unlock_irqrestore(&serial_table_lock, flags);
647 return index;
648 }
649 }
650 spin_unlock_irqrestore(&serial_table_lock, flags);
651
652 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
653 return -1;
654}
655
656static void set_serial_by_index(unsigned index, struct hso_serial *serial)
657{
658 unsigned long flags;
659
660 spin_lock_irqsave(&serial_table_lock, flags);
661 if (serial)
662 serial_table[index] = serial->parent;
663 else
664 serial_table[index] = NULL;
665 spin_unlock_irqrestore(&serial_table_lock, flags);
666}
667
668static void handle_usb_error(int status, const char *function,
669 struct hso_device *hso_dev)
670{
671 char *explanation;
672
673 switch (status) {
674 case -ENODEV:
675 explanation = "no device";
676 break;
677 case -ENOENT:
678 explanation = "endpoint not enabled";
679 break;
680 case -EPIPE:
681 explanation = "endpoint stalled";
682 break;
683 case -ENOSPC:
684 explanation = "not enough bandwidth";
685 break;
686 case -ESHUTDOWN:
687 explanation = "device disabled";
688 break;
689 case -EHOSTUNREACH:
690 explanation = "device suspended";
691 break;
692 case -EINVAL:
693 case -EAGAIN:
694 case -EFBIG:
695 case -EMSGSIZE:
696 explanation = "internal error";
697 break;
698 case -EILSEQ:
699 case -EPROTO:
700 case -ETIME:
701 case -ETIMEDOUT:
702 explanation = "protocol error";
703 if (hso_dev)
704 usb_queue_reset_device(hso_dev->interface);
705 break;
706 default:
707 explanation = "unknown status";
708 break;
709 }
710
711 /* log a meaningful explanation of an USB status */
712 D1("%s: received USB status - %s (%d)", function, explanation, status);
713}
714
715/* Network interface functions */
716
717/* called when net interface is brought up by ifconfig */
718static int hso_net_open(struct net_device *net)
719{
720 struct hso_net *odev = netdev_priv(net);
721 unsigned long flags = 0;
722
723 if (!odev) {
724 dev_err(&net->dev, "No net device !\n");
725 return -ENODEV;
726 }
727
728 odev->skb_tx_buf = NULL;
729
730 /* setup environment */
731 spin_lock_irqsave(&odev->net_lock, flags);
732 odev->rx_parse_state = WAIT_IP;
733 odev->rx_buf_size = 0;
734 odev->rx_buf_missing = sizeof(struct iphdr);
735 spin_unlock_irqrestore(&odev->net_lock, flags);
736
737 /* We are up and running. */
738 set_bit(HSO_NET_RUNNING, &odev->flags);
739 hso_start_net_device(odev->parent);
740
741 /* Tell the kernel we are ready to start receiving from it */
742 netif_start_queue(net);
743
744 return 0;
745}
746
747/* called when interface is brought down by ifconfig */
748static int hso_net_close(struct net_device *net)
749{
750 struct hso_net *odev = netdev_priv(net);
751
752 /* we don't need the queue anymore */
753 netif_stop_queue(net);
754 /* no longer running */
755 clear_bit(HSO_NET_RUNNING, &odev->flags);
756
757 hso_stop_net_device(odev->parent);
758
759 /* done */
760 return 0;
761}
762
763/* USB tells is xmit done, we should start the netqueue again */
764static void write_bulk_callback(struct urb *urb)
765{
766 struct hso_net *odev = urb->context;
767 int status = urb->status;
768
769 /* Sanity check */
770 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
771 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
772 return;
773 }
774
775 /* Do we still have a valid kernel network device? */
776 if (!netif_device_present(odev->net)) {
777 dev_err(&urb->dev->dev, "%s: net device not present\n",
778 __func__);
779 return;
780 }
781
782 /* log status, but don't act on it, we don't need to resubmit anything
783 * anyhow */
784 if (status)
785 handle_usb_error(status, __func__, odev->parent);
786
787 hso_put_activity(odev->parent);
788
789 /* Tell the network interface we are ready for another frame */
790 netif_wake_queue(odev->net);
791}
792
793/* called by kernel when we need to transmit a packet */
794static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
795 struct net_device *net)
796{
797 struct hso_net *odev = netdev_priv(net);
798 int result;
799
800 /* Tell the kernel, "No more frames 'til we are done with this one." */
801 netif_stop_queue(net);
802 if (hso_get_activity(odev->parent) == -EAGAIN) {
803 odev->skb_tx_buf = skb;
804 return NETDEV_TX_OK;
805 }
806
807 /* log if asked */
808 DUMP1(skb->data, skb->len);
809 /* Copy it from kernel memory to OUR memory */
810 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
811 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
812
813 /* Fill in the URB for shipping it out. */
814 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
815 odev->parent->usb,
816 usb_sndbulkpipe(odev->parent->usb,
817 odev->out_endp->
818 bEndpointAddress & 0x7F),
819 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
820 odev);
821
822 /* Deal with the Zero Length packet problem, I hope */
823 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
824
825 /* Send the URB on its merry way. */
826 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
827 if (result) {
828 dev_warn(&odev->parent->interface->dev,
829 "failed mux_bulk_tx_urb %d\n", result);
830 net->stats.tx_errors++;
831 netif_start_queue(net);
832 } else {
833 net->stats.tx_packets++;
834 net->stats.tx_bytes += skb->len;
835 }
836 dev_kfree_skb(skb);
837 /* we're done */
838 return NETDEV_TX_OK;
839}
840
841static const struct ethtool_ops ops = {
842 .get_link = ethtool_op_get_link
843};
844
845/* called when a packet did not ack after watchdogtimeout */
846static void hso_net_tx_timeout(struct net_device *net)
847{
848 struct hso_net *odev = netdev_priv(net);
849
850 if (!odev)
851 return;
852
853 /* Tell syslog we are hosed. */
854 dev_warn(&net->dev, "Tx timed out.\n");
855
856 /* Tear the waiting frame off the list */
857 if (odev->mux_bulk_tx_urb &&
858 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
859 usb_unlink_urb(odev->mux_bulk_tx_urb);
860
861 /* Update statistics */
862 net->stats.tx_errors++;
863}
864
865/* make a real packet from the received USB buffer */
866static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
867 unsigned int count, unsigned char is_eop)
868{
869 unsigned short temp_bytes;
870 unsigned short buffer_offset = 0;
871 unsigned short frame_len;
872 unsigned char *tmp_rx_buf;
873
874 /* log if needed */
875 D1("Rx %d bytes", count);
876 DUMP(ip_pkt, min(128, (int)count));
877
878 while (count) {
879 switch (odev->rx_parse_state) {
880 case WAIT_IP:
881 /* waiting for IP header. */
882 /* wanted bytes - size of ip header */
883 temp_bytes =
884 (count <
885 odev->rx_buf_missing) ? count : odev->
886 rx_buf_missing;
887
888 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
889 odev->rx_buf_size, ip_pkt + buffer_offset,
890 temp_bytes);
891
892 odev->rx_buf_size += temp_bytes;
893 buffer_offset += temp_bytes;
894 odev->rx_buf_missing -= temp_bytes;
895 count -= temp_bytes;
896
897 if (!odev->rx_buf_missing) {
898 /* header is complete allocate an sk_buffer and
899 * continue to WAIT_DATA */
900 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
901
902 if ((frame_len > DEFAULT_MRU) ||
903 (frame_len < sizeof(struct iphdr))) {
904 dev_err(&odev->net->dev,
905 "Invalid frame (%d) length\n",
906 frame_len);
907 odev->rx_parse_state = WAIT_SYNC;
908 continue;
909 }
910 /* Allocate an sk_buff */
911 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
912 frame_len);
913 if (!odev->skb_rx_buf) {
914 /* We got no receive buffer. */
915 D1("could not allocate memory");
916 odev->rx_parse_state = WAIT_SYNC;
917 continue;
918 }
919
920 /* Copy what we got so far. make room for iphdr
921 * after tail. */
922 tmp_rx_buf =
923 skb_put(odev->skb_rx_buf,
924 sizeof(struct iphdr));
925 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
926 sizeof(struct iphdr));
927
928 /* ETH_HLEN */
929 odev->rx_buf_size = sizeof(struct iphdr);
930
931 /* Filip actually use .tot_len */
932 odev->rx_buf_missing =
933 frame_len - sizeof(struct iphdr);
934 odev->rx_parse_state = WAIT_DATA;
935 }
936 break;
937
938 case WAIT_DATA:
939 temp_bytes = (count < odev->rx_buf_missing)
940 ? count : odev->rx_buf_missing;
941
942 /* Copy the rest of the bytes that are left in the
943 * buffer into the waiting sk_buf. */
944 /* Make room for temp_bytes after tail. */
945 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
946 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
947
948 odev->rx_buf_missing -= temp_bytes;
949 count -= temp_bytes;
950 buffer_offset += temp_bytes;
951 odev->rx_buf_size += temp_bytes;
952 if (!odev->rx_buf_missing) {
953 /* Packet is complete. Inject into stack. */
954 /* We have IP packet here */
955 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
956 skb_reset_mac_header(odev->skb_rx_buf);
957
958 /* Ship it off to the kernel */
959 netif_rx(odev->skb_rx_buf);
960 /* No longer our buffer. */
961 odev->skb_rx_buf = NULL;
962
963 /* update out statistics */
964 odev->net->stats.rx_packets++;
965
966 odev->net->stats.rx_bytes += odev->rx_buf_size;
967
968 odev->rx_buf_size = 0;
969 odev->rx_buf_missing = sizeof(struct iphdr);
970 odev->rx_parse_state = WAIT_IP;
971 }
972 break;
973
974 case WAIT_SYNC:
975 D1(" W_S");
976 count = 0;
977 break;
978 default:
979 D1(" ");
980 count--;
981 break;
982 }
983 }
984
985 /* Recovery mechanism for WAIT_SYNC state. */
986 if (is_eop) {
987 if (odev->rx_parse_state == WAIT_SYNC) {
988 odev->rx_parse_state = WAIT_IP;
989 odev->rx_buf_size = 0;
990 odev->rx_buf_missing = sizeof(struct iphdr);
991 }
992 }
993}
994
995static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
996{
997 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
998 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
999
1000 if (((rest == 5) || (rest == 6)) &&
1001 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
1002 crc_check, 4)) {
1003 urb->actual_length -= 4;
1004 }
1005}
1006
1007/* Moving data from usb to kernel (in interrupt state) */
1008static void read_bulk_callback(struct urb *urb)
1009{
1010 struct hso_net *odev = urb->context;
1011 struct net_device *net;
1012 int result;
1013 int status = urb->status;
1014
1015 /* is al ok? (Filip: Who's Al ?) */
1016 if (status) {
1017 handle_usb_error(status, __func__, odev->parent);
1018 return;
1019 }
1020
1021 /* Sanity check */
1022 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1023 D1("BULK IN callback but driver is not active!");
1024 return;
1025 }
1026 usb_mark_last_busy(urb->dev);
1027
1028 net = odev->net;
1029
1030 if (!netif_device_present(net)) {
1031 /* Somebody killed our network interface... */
1032 return;
1033 }
1034
1035 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1036 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1037
1038 /* do we even have a packet? */
1039 if (urb->actual_length) {
1040 /* Handle the IP stream, add header and push it onto network
1041 * stack if the packet is complete. */
1042 spin_lock(&odev->net_lock);
1043 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1044 (urb->transfer_buffer_length >
1045 urb->actual_length) ? 1 : 0);
1046 spin_unlock(&odev->net_lock);
1047 }
1048
1049 /* We are done with this URB, resubmit it. Prep the USB to wait for
1050 * another frame. Reuse same as received. */
1051 usb_fill_bulk_urb(urb,
1052 odev->parent->usb,
1053 usb_rcvbulkpipe(odev->parent->usb,
1054 odev->in_endp->
1055 bEndpointAddress & 0x7F),
1056 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1057 read_bulk_callback, odev);
1058
1059 /* Give this to the USB subsystem so it can tell us when more data
1060 * arrives. */
1061 result = usb_submit_urb(urb, GFP_ATOMIC);
1062 if (result)
1063 dev_warn(&odev->parent->interface->dev,
1064 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1065 result);
1066}
1067
1068/* Serial driver functions */
1069
1070static void hso_init_termios(struct ktermios *termios)
1071{
1072 /*
1073 * The default requirements for this device are:
1074 */
1075 termios->c_iflag &=
1076 ~(IGNBRK /* disable ignore break */
1077 | BRKINT /* disable break causes interrupt */
1078 | PARMRK /* disable mark parity errors */
1079 | ISTRIP /* disable clear high bit of input characters */
1080 | INLCR /* disable translate NL to CR */
1081 | IGNCR /* disable ignore CR */
1082 | ICRNL /* disable translate CR to NL */
1083 | IXON); /* disable enable XON/XOFF flow control */
1084
1085 /* disable postprocess output characters */
1086 termios->c_oflag &= ~OPOST;
1087
1088 termios->c_lflag &=
1089 ~(ECHO /* disable echo input characters */
1090 | ECHONL /* disable echo new line */
1091 | ICANON /* disable erase, kill, werase, and rprnt
1092 special characters */
1093 | ISIG /* disable interrupt, quit, and suspend special
1094 characters */
1095 | IEXTEN); /* disable non-POSIX special characters */
1096
1097 termios->c_cflag &=
1098 ~(CSIZE /* no size */
1099 | PARENB /* disable parity bit */
1100 | CBAUD /* clear current baud rate */
1101 | CBAUDEX); /* clear current buad rate */
1102
1103 termios->c_cflag |= CS8; /* character size 8 bits */
1104
1105 /* baud rate 115200 */
1106 tty_termios_encode_baud_rate(termios, 115200, 115200);
1107}
1108
1109static void _hso_serial_set_termios(struct tty_struct *tty,
1110 struct ktermios *old)
1111{
1112 struct hso_serial *serial = tty->driver_data;
1113
1114 if (!serial) {
1115 printk(KERN_ERR "%s: no tty structures", __func__);
1116 return;
1117 }
1118
1119 D4("port %d", serial->minor);
1120
1121 /*
1122 * Fix up unsupported bits
1123 */
1124 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1125
1126 tty->termios.c_cflag &=
1127 ~(CSIZE /* no size */
1128 | PARENB /* disable parity bit */
1129 | CBAUD /* clear current baud rate */
1130 | CBAUDEX); /* clear current buad rate */
1131
1132 tty->termios.c_cflag |= CS8; /* character size 8 bits */
1133
1134 /* baud rate 115200 */
1135 tty_encode_baud_rate(tty, 115200, 115200);
1136}
1137
1138static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1139{
1140 int result;
1141 /* We are done with this URB, resubmit it. Prep the USB to wait for
1142 * another frame */
1143 usb_fill_bulk_urb(urb, serial->parent->usb,
1144 usb_rcvbulkpipe(serial->parent->usb,
1145 serial->in_endp->
1146 bEndpointAddress & 0x7F),
1147 urb->transfer_buffer, serial->rx_data_length,
1148 hso_std_serial_read_bulk_callback, serial);
1149 /* Give this to the USB subsystem so it can tell us when more data
1150 * arrives. */
1151 result = usb_submit_urb(urb, GFP_ATOMIC);
1152 if (result) {
1153 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1154 __func__, result);
1155 }
1156}
1157
1158
1159
1160
1161static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1162{
1163 int count;
1164 struct urb *curr_urb;
1165
1166 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1167 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1168 count = put_rxbuf_data(curr_urb, serial);
1169 if (count == -1)
1170 return;
1171 if (count == 0) {
1172 serial->curr_rx_urb_idx++;
1173 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1174 serial->curr_rx_urb_idx = 0;
1175 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1176 }
1177 }
1178}
1179
1180static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1181{
1182 int count = 0;
1183 struct urb *urb;
1184
1185 urb = serial->rx_urb[0];
1186 if (serial->port.count > 0) {
1187 count = put_rxbuf_data(urb, serial);
1188 if (count == -1)
1189 return;
1190 }
1191 /* Re issue a read as long as we receive data. */
1192
1193 if (count == 0 && ((urb->actual_length != 0) ||
1194 (serial->rx_state == RX_PENDING))) {
1195 serial->rx_state = RX_SENT;
1196 hso_mux_serial_read(serial);
1197 } else
1198 serial->rx_state = RX_IDLE;
1199}
1200
1201
1202/* read callback for Diag and CS port */
1203static void hso_std_serial_read_bulk_callback(struct urb *urb)
1204{
1205 struct hso_serial *serial = urb->context;
1206 int status = urb->status;
1207
1208 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1209
1210 /* sanity check */
1211 if (!serial) {
1212 D1("serial == NULL");
1213 return;
1214 }
1215 if (status) {
1216 handle_usb_error(status, __func__, serial->parent);
1217 return;
1218 }
1219
1220 D1("Actual length = %d\n", urb->actual_length);
1221 DUMP1(urb->transfer_buffer, urb->actual_length);
1222
1223 /* Anyone listening? */
1224 if (serial->port.count == 0)
1225 return;
1226
1227 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1228 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1229 /* Valid data, handle RX data */
1230 spin_lock(&serial->serial_lock);
1231 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1232 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1233 spin_unlock(&serial->serial_lock);
1234}
1235
1236/*
1237 * This needs to be a tasklet otherwise we will
1238 * end up recursively calling this function.
1239 */
1240static void hso_unthrottle_tasklet(struct hso_serial *serial)
1241{
1242 unsigned long flags;
1243
1244 spin_lock_irqsave(&serial->serial_lock, flags);
1245 if ((serial->parent->port_spec & HSO_INTF_MUX))
1246 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1247 else
1248 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1249 spin_unlock_irqrestore(&serial->serial_lock, flags);
1250}
1251
1252static void hso_unthrottle(struct tty_struct *tty)
1253{
1254 struct hso_serial *serial = tty->driver_data;
1255
1256 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1257}
1258
1259/* open the requested serial port */
1260static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1261{
1262 struct hso_serial *serial = get_serial_by_index(tty->index);
1263 int result;
1264
1265 /* sanity check */
1266 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1267 WARN_ON(1);
1268 tty->driver_data = NULL;
1269 D1("Failed to open port");
1270 return -ENODEV;
1271 }
1272
1273 mutex_lock(&serial->parent->mutex);
1274 result = usb_autopm_get_interface(serial->parent->interface);
1275 if (result < 0)
1276 goto err_out;
1277
1278 D1("Opening %d", serial->minor);
1279
1280 /* setup */
1281 tty->driver_data = serial;
1282 tty_port_tty_set(&serial->port, tty);
1283
1284 /* check for port already opened, if not set the termios */
1285 serial->port.count++;
1286 if (serial->port.count == 1) {
1287 serial->rx_state = RX_IDLE;
1288 /* Force default termio settings */
1289 _hso_serial_set_termios(tty, NULL);
1290 tasklet_init(&serial->unthrottle_tasklet,
1291 (void (*)(unsigned long))hso_unthrottle_tasklet,
1292 (unsigned long)serial);
1293 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1294 if (result) {
1295 hso_stop_serial_device(serial->parent);
1296 serial->port.count--;
1297 } else {
1298 kref_get(&serial->parent->ref);
1299 }
1300 } else {
1301 D1("Port was already open");
1302 }
1303
1304 usb_autopm_put_interface(serial->parent->interface);
1305
1306 /* done */
1307 if (result)
1308 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1309err_out:
1310 mutex_unlock(&serial->parent->mutex);
1311 return result;
1312}
1313
1314/* close the requested serial port */
1315static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1316{
1317 struct hso_serial *serial = tty->driver_data;
1318 u8 usb_gone;
1319
1320 D1("Closing serial port");
1321
1322 /* Open failed, no close cleanup required */
1323 if (serial == NULL)
1324 return;
1325
1326 mutex_lock(&serial->parent->mutex);
1327 usb_gone = serial->parent->usb_gone;
1328
1329 if (!usb_gone)
1330 usb_autopm_get_interface(serial->parent->interface);
1331
1332 /* reset the rts and dtr */
1333 /* do the actual close */
1334 serial->port.count--;
1335
1336 if (serial->port.count <= 0) {
1337 serial->port.count = 0;
1338 tty_port_tty_set(&serial->port, NULL);
1339 if (!usb_gone)
1340 hso_stop_serial_device(serial->parent);
1341 tasklet_kill(&serial->unthrottle_tasklet);
1342 }
1343
1344 if (!usb_gone)
1345 usb_autopm_put_interface(serial->parent->interface);
1346
1347 mutex_unlock(&serial->parent->mutex);
1348}
1349
1350/* close the requested serial port */
1351static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1352 int count)
1353{
1354 struct hso_serial *serial = tty->driver_data;
1355 int space, tx_bytes;
1356 unsigned long flags;
1357
1358 /* sanity check */
1359 if (serial == NULL) {
1360 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1361 return -ENODEV;
1362 }
1363
1364 spin_lock_irqsave(&serial->serial_lock, flags);
1365
1366 space = serial->tx_data_length - serial->tx_buffer_count;
1367 tx_bytes = (count < space) ? count : space;
1368
1369 if (!tx_bytes)
1370 goto out;
1371
1372 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1373 serial->tx_buffer_count += tx_bytes;
1374
1375out:
1376 spin_unlock_irqrestore(&serial->serial_lock, flags);
1377
1378 hso_kick_transmit(serial);
1379 /* done */
1380 return tx_bytes;
1381}
1382
1383/* how much room is there for writing */
1384static int hso_serial_write_room(struct tty_struct *tty)
1385{
1386 struct hso_serial *serial = tty->driver_data;
1387 int room;
1388 unsigned long flags;
1389
1390 spin_lock_irqsave(&serial->serial_lock, flags);
1391 room = serial->tx_data_length - serial->tx_buffer_count;
1392 spin_unlock_irqrestore(&serial->serial_lock, flags);
1393
1394 /* return free room */
1395 return room;
1396}
1397
1398static void hso_serial_cleanup(struct tty_struct *tty)
1399{
1400 struct hso_serial *serial = tty->driver_data;
1401
1402 if (!serial)
1403 return;
1404
1405 kref_put(&serial->parent->ref, hso_serial_ref_free);
1406}
1407
1408/* setup the term */
1409static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1410{
1411 struct hso_serial *serial = tty->driver_data;
1412 unsigned long flags;
1413
1414 if (old)
1415 D5("Termios called with: cflags new[%d] - old[%d]",
1416 tty->termios.c_cflag, old->c_cflag);
1417
1418 /* the actual setup */
1419 spin_lock_irqsave(&serial->serial_lock, flags);
1420 if (serial->port.count)
1421 _hso_serial_set_termios(tty, old);
1422 else
1423 tty->termios = *old;
1424 spin_unlock_irqrestore(&serial->serial_lock, flags);
1425
1426 /* done */
1427}
1428
1429/* how many characters in the buffer */
1430static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1431{
1432 struct hso_serial *serial = tty->driver_data;
1433 int chars;
1434 unsigned long flags;
1435
1436 /* sanity check */
1437 if (serial == NULL)
1438 return 0;
1439
1440 spin_lock_irqsave(&serial->serial_lock, flags);
1441 chars = serial->tx_buffer_count;
1442 spin_unlock_irqrestore(&serial->serial_lock, flags);
1443
1444 return chars;
1445}
1446static int tiocmget_submit_urb(struct hso_serial *serial,
1447 struct hso_tiocmget *tiocmget,
1448 struct usb_device *usb)
1449{
1450 int result;
1451
1452 if (serial->parent->usb_gone)
1453 return -ENODEV;
1454 usb_fill_int_urb(tiocmget->urb, usb,
1455 usb_rcvintpipe(usb,
1456 tiocmget->endp->
1457 bEndpointAddress & 0x7F),
1458 &tiocmget->serial_state_notification,
1459 sizeof(struct hso_serial_state_notification),
1460 tiocmget_intr_callback, serial,
1461 tiocmget->endp->bInterval);
1462 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1463 if (result) {
1464 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1465 result);
1466 }
1467 return result;
1468
1469}
1470
1471static void tiocmget_intr_callback(struct urb *urb)
1472{
1473 struct hso_serial *serial = urb->context;
1474 struct hso_tiocmget *tiocmget;
1475 int status = urb->status;
1476 u16 UART_state_bitmap, prev_UART_state_bitmap;
1477 struct uart_icount *icount;
1478 struct hso_serial_state_notification *serial_state_notification;
1479 struct usb_device *usb;
1480 struct usb_interface *interface;
1481 int if_num;
1482
1483 /* Sanity checks */
1484 if (!serial)
1485 return;
1486 if (status) {
1487 handle_usb_error(status, __func__, serial->parent);
1488 return;
1489 }
1490
1491 /* tiocmget is only supported on HSO_PORT_MODEM */
1492 tiocmget = serial->tiocmget;
1493 if (!tiocmget)
1494 return;
1495 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
1496
1497 usb = serial->parent->usb;
1498 interface = serial->parent->interface;
1499
1500 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1501
1502 /* wIndex should be the USB interface number of the port to which the
1503 * notification applies, which should always be the Modem port.
1504 */
1505 serial_state_notification = &tiocmget->serial_state_notification;
1506 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1507 serial_state_notification->bNotification != B_NOTIFICATION ||
1508 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1509 le16_to_cpu(serial_state_notification->wIndex) != if_num ||
1510 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1511 dev_warn(&usb->dev,
1512 "hso received invalid serial state notification\n");
1513 DUMP(serial_state_notification,
1514 sizeof(struct hso_serial_state_notification));
1515 } else {
1516
1517 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1518 UART_state_bitmap);
1519 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1520 icount = &tiocmget->icount;
1521 spin_lock(&serial->serial_lock);
1522 if ((UART_state_bitmap & B_OVERRUN) !=
1523 (prev_UART_state_bitmap & B_OVERRUN))
1524 icount->parity++;
1525 if ((UART_state_bitmap & B_PARITY) !=
1526 (prev_UART_state_bitmap & B_PARITY))
1527 icount->parity++;
1528 if ((UART_state_bitmap & B_FRAMING) !=
1529 (prev_UART_state_bitmap & B_FRAMING))
1530 icount->frame++;
1531 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1532 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1533 icount->rng++;
1534 if ((UART_state_bitmap & B_BREAK) !=
1535 (prev_UART_state_bitmap & B_BREAK))
1536 icount->brk++;
1537 if ((UART_state_bitmap & B_TX_CARRIER) !=
1538 (prev_UART_state_bitmap & B_TX_CARRIER))
1539 icount->dsr++;
1540 if ((UART_state_bitmap & B_RX_CARRIER) !=
1541 (prev_UART_state_bitmap & B_RX_CARRIER))
1542 icount->dcd++;
1543 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1544 spin_unlock(&serial->serial_lock);
1545 tiocmget->intr_completed = 1;
1546 wake_up_interruptible(&tiocmget->waitq);
1547 }
1548 memset(serial_state_notification, 0,
1549 sizeof(struct hso_serial_state_notification));
1550 tiocmget_submit_urb(serial,
1551 tiocmget,
1552 serial->parent->usb);
1553}
1554
1555/*
1556 * next few functions largely stolen from drivers/serial/serial_core.c
1557 */
1558/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1559 * - mask passed in arg for lines of interest
1560 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1561 * Caller should use TIOCGICOUNT to see which one it was
1562 */
1563static int
1564hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1565{
1566 DECLARE_WAITQUEUE(wait, current);
1567 struct uart_icount cprev, cnow;
1568 struct hso_tiocmget *tiocmget;
1569 int ret;
1570
1571 tiocmget = serial->tiocmget;
1572 if (!tiocmget)
1573 return -ENOENT;
1574 /*
1575 * note the counters on entry
1576 */
1577 spin_lock_irq(&serial->serial_lock);
1578 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1579 spin_unlock_irq(&serial->serial_lock);
1580 add_wait_queue(&tiocmget->waitq, &wait);
1581 for (;;) {
1582 spin_lock_irq(&serial->serial_lock);
1583 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1584 spin_unlock_irq(&serial->serial_lock);
1585 set_current_state(TASK_INTERRUPTIBLE);
1586 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1587 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1588 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1589 ret = 0;
1590 break;
1591 }
1592 schedule();
1593 /* see if a signal did it */
1594 if (signal_pending(current)) {
1595 ret = -ERESTARTSYS;
1596 break;
1597 }
1598 cprev = cnow;
1599 }
1600 __set_current_state(TASK_RUNNING);
1601 remove_wait_queue(&tiocmget->waitq, &wait);
1602
1603 return ret;
1604}
1605
1606/*
1607 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1608 * Return: write counters to the user passed counter struct
1609 * NB: both 1->0 and 0->1 transitions are counted except for
1610 * RI where only 0->1 is counted.
1611 */
1612static int hso_get_count(struct tty_struct *tty,
1613 struct serial_icounter_struct *icount)
1614{
1615 struct uart_icount cnow;
1616 struct hso_serial *serial = tty->driver_data;
1617 struct hso_tiocmget *tiocmget = serial->tiocmget;
1618
1619 memset(icount, 0, sizeof(struct serial_icounter_struct));
1620
1621 if (!tiocmget)
1622 return -ENOENT;
1623 spin_lock_irq(&serial->serial_lock);
1624 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1625 spin_unlock_irq(&serial->serial_lock);
1626
1627 icount->cts = cnow.cts;
1628 icount->dsr = cnow.dsr;
1629 icount->rng = cnow.rng;
1630 icount->dcd = cnow.dcd;
1631 icount->rx = cnow.rx;
1632 icount->tx = cnow.tx;
1633 icount->frame = cnow.frame;
1634 icount->overrun = cnow.overrun;
1635 icount->parity = cnow.parity;
1636 icount->brk = cnow.brk;
1637 icount->buf_overrun = cnow.buf_overrun;
1638
1639 return 0;
1640}
1641
1642
1643static int hso_serial_tiocmget(struct tty_struct *tty)
1644{
1645 int retval;
1646 struct hso_serial *serial = tty->driver_data;
1647 struct hso_tiocmget *tiocmget;
1648 u16 UART_state_bitmap;
1649
1650 /* sanity check */
1651 if (!serial) {
1652 D1("no tty structures");
1653 return -EINVAL;
1654 }
1655 spin_lock_irq(&serial->serial_lock);
1656 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1657 ((serial->dtr_state) ? TIOCM_DTR : 0);
1658 tiocmget = serial->tiocmget;
1659 if (tiocmget) {
1660
1661 UART_state_bitmap = le16_to_cpu(
1662 tiocmget->prev_UART_state_bitmap);
1663 if (UART_state_bitmap & B_RING_SIGNAL)
1664 retval |= TIOCM_RNG;
1665 if (UART_state_bitmap & B_RX_CARRIER)
1666 retval |= TIOCM_CD;
1667 if (UART_state_bitmap & B_TX_CARRIER)
1668 retval |= TIOCM_DSR;
1669 }
1670 spin_unlock_irq(&serial->serial_lock);
1671 return retval;
1672}
1673
1674static int hso_serial_tiocmset(struct tty_struct *tty,
1675 unsigned int set, unsigned int clear)
1676{
1677 int val = 0;
1678 unsigned long flags;
1679 int if_num;
1680 struct hso_serial *serial = tty->driver_data;
1681 struct usb_interface *interface;
1682
1683 /* sanity check */
1684 if (!serial) {
1685 D1("no tty structures");
1686 return -EINVAL;
1687 }
1688
1689 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1690 return -EINVAL;
1691
1692 interface = serial->parent->interface;
1693 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1694
1695 spin_lock_irqsave(&serial->serial_lock, flags);
1696 if (set & TIOCM_RTS)
1697 serial->rts_state = 1;
1698 if (set & TIOCM_DTR)
1699 serial->dtr_state = 1;
1700
1701 if (clear & TIOCM_RTS)
1702 serial->rts_state = 0;
1703 if (clear & TIOCM_DTR)
1704 serial->dtr_state = 0;
1705
1706 if (serial->dtr_state)
1707 val |= 0x01;
1708 if (serial->rts_state)
1709 val |= 0x02;
1710
1711 spin_unlock_irqrestore(&serial->serial_lock, flags);
1712
1713 return usb_control_msg(serial->parent->usb,
1714 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1715 0x21, val, if_num, NULL, 0,
1716 USB_CTRL_SET_TIMEOUT);
1717}
1718
1719static int hso_serial_ioctl(struct tty_struct *tty,
1720 unsigned int cmd, unsigned long arg)
1721{
1722 struct hso_serial *serial = tty->driver_data;
1723 int ret = 0;
1724 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1725
1726 if (!serial)
1727 return -ENODEV;
1728 switch (cmd) {
1729 case TIOCMIWAIT:
1730 ret = hso_wait_modem_status(serial, arg);
1731 break;
1732 default:
1733 ret = -ENOIOCTLCMD;
1734 break;
1735 }
1736 return ret;
1737}
1738
1739
1740/* starts a transmit */
1741static void hso_kick_transmit(struct hso_serial *serial)
1742{
1743 u8 *temp;
1744 unsigned long flags;
1745 int res;
1746
1747 spin_lock_irqsave(&serial->serial_lock, flags);
1748 if (!serial->tx_buffer_count)
1749 goto out;
1750
1751 if (serial->tx_urb_used)
1752 goto out;
1753
1754 /* Wakeup USB interface if necessary */
1755 if (hso_get_activity(serial->parent) == -EAGAIN)
1756 goto out;
1757
1758 /* Switch pointers around to avoid memcpy */
1759 temp = serial->tx_buffer;
1760 serial->tx_buffer = serial->tx_data;
1761 serial->tx_data = temp;
1762 serial->tx_data_count = serial->tx_buffer_count;
1763 serial->tx_buffer_count = 0;
1764
1765 /* If temp is set, it means we switched buffers */
1766 if (temp && serial->write_data) {
1767 res = serial->write_data(serial);
1768 if (res >= 0)
1769 serial->tx_urb_used = 1;
1770 }
1771out:
1772 spin_unlock_irqrestore(&serial->serial_lock, flags);
1773}
1774
1775/* make a request (for reading and writing data to muxed serial port) */
1776static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1777 struct urb *ctrl_urb,
1778 struct usb_ctrlrequest *ctrl_req,
1779 u8 *ctrl_urb_data, u32 size)
1780{
1781 int result;
1782 int pipe;
1783
1784 /* Sanity check */
1785 if (!serial || !ctrl_urb || !ctrl_req) {
1786 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1787 return -EINVAL;
1788 }
1789
1790 /* initialize */
1791 ctrl_req->wValue = 0;
1792 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1793 ctrl_req->wLength = cpu_to_le16(size);
1794
1795 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1796 /* Reading command */
1797 ctrl_req->bRequestType = USB_DIR_IN |
1798 USB_TYPE_OPTION_VENDOR |
1799 USB_RECIP_INTERFACE;
1800 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1801 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1802 } else {
1803 /* Writing command */
1804 ctrl_req->bRequestType = USB_DIR_OUT |
1805 USB_TYPE_OPTION_VENDOR |
1806 USB_RECIP_INTERFACE;
1807 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1808 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1809 }
1810 /* syslog */
1811 D2("%s command (%02x) len: %d, port: %d",
1812 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1813 ctrl_req->bRequestType, ctrl_req->wLength, port);
1814
1815 /* Load ctrl urb */
1816 ctrl_urb->transfer_flags = 0;
1817 usb_fill_control_urb(ctrl_urb,
1818 serial->parent->usb,
1819 pipe,
1820 (u8 *) ctrl_req,
1821 ctrl_urb_data, size, ctrl_callback, serial);
1822 /* Send it on merry way */
1823 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1824 if (result) {
1825 dev_err(&ctrl_urb->dev->dev,
1826 "%s failed submit ctrl_urb %d type %d\n", __func__,
1827 result, type);
1828 return result;
1829 }
1830
1831 /* done */
1832 return size;
1833}
1834
1835/* called by intr_callback when read occurs */
1836static int hso_mux_serial_read(struct hso_serial *serial)
1837{
1838 if (!serial)
1839 return -EINVAL;
1840
1841 /* clean data */
1842 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1843 /* make the request */
1844
1845 if (serial->num_rx_urbs != 1) {
1846 dev_err(&serial->parent->interface->dev,
1847 "ERROR: mux'd reads with multiple buffers "
1848 "not possible\n");
1849 return 0;
1850 }
1851 return mux_device_request(serial,
1852 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1853 serial->parent->port_spec & HSO_PORT_MASK,
1854 serial->rx_urb[0],
1855 &serial->ctrl_req_rx,
1856 serial->rx_data[0], serial->rx_data_length);
1857}
1858
1859/* used for muxed serial port callback (muxed serial read) */
1860static void intr_callback(struct urb *urb)
1861{
1862 struct hso_shared_int *shared_int = urb->context;
1863 struct hso_serial *serial;
1864 unsigned char *port_req;
1865 int status = urb->status;
1866 int i;
1867
1868 usb_mark_last_busy(urb->dev);
1869
1870 /* sanity check */
1871 if (!shared_int)
1872 return;
1873
1874 /* status check */
1875 if (status) {
1876 handle_usb_error(status, __func__, NULL);
1877 return;
1878 }
1879 D4("\n--- Got intr callback 0x%02X ---", status);
1880
1881 /* what request? */
1882 port_req = urb->transfer_buffer;
1883 D4(" port_req = 0x%.2X\n", *port_req);
1884 /* loop over all muxed ports to find the one sending this */
1885 for (i = 0; i < 8; i++) {
1886 /* max 8 channels on MUX */
1887 if (*port_req & (1 << i)) {
1888 serial = get_serial_by_shared_int_and_type(shared_int,
1889 (1 << i));
1890 if (serial != NULL) {
1891 D1("Pending read interrupt on port %d\n", i);
1892 spin_lock(&serial->serial_lock);
1893 if (serial->rx_state == RX_IDLE &&
1894 serial->port.count > 0) {
1895 /* Setup and send a ctrl req read on
1896 * port i */
1897 if (!serial->rx_urb_filled[0]) {
1898 serial->rx_state = RX_SENT;
1899 hso_mux_serial_read(serial);
1900 } else
1901 serial->rx_state = RX_PENDING;
1902 } else {
1903 D1("Already a read pending on "
1904 "port %d or port not open\n", i);
1905 }
1906 spin_unlock(&serial->serial_lock);
1907 }
1908 }
1909 }
1910 /* Resubmit interrupt urb */
1911 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1912}
1913
1914/* called for writing to muxed serial port */
1915static int hso_mux_serial_write_data(struct hso_serial *serial)
1916{
1917 if (NULL == serial)
1918 return -EINVAL;
1919
1920 return mux_device_request(serial,
1921 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1922 serial->parent->port_spec & HSO_PORT_MASK,
1923 serial->tx_urb,
1924 &serial->ctrl_req_tx,
1925 serial->tx_data, serial->tx_data_count);
1926}
1927
1928/* write callback for Diag and CS port */
1929static void hso_std_serial_write_bulk_callback(struct urb *urb)
1930{
1931 struct hso_serial *serial = urb->context;
1932 int status = urb->status;
1933
1934 /* sanity check */
1935 if (!serial) {
1936 D1("serial == NULL");
1937 return;
1938 }
1939
1940 spin_lock(&serial->serial_lock);
1941 serial->tx_urb_used = 0;
1942 spin_unlock(&serial->serial_lock);
1943 if (status) {
1944 handle_usb_error(status, __func__, serial->parent);
1945 return;
1946 }
1947 hso_put_activity(serial->parent);
1948 tty_port_tty_wakeup(&serial->port);
1949 hso_kick_transmit(serial);
1950
1951 D1(" ");
1952}
1953
1954/* called for writing diag or CS serial port */
1955static int hso_std_serial_write_data(struct hso_serial *serial)
1956{
1957 int count = serial->tx_data_count;
1958 int result;
1959
1960 usb_fill_bulk_urb(serial->tx_urb,
1961 serial->parent->usb,
1962 usb_sndbulkpipe(serial->parent->usb,
1963 serial->out_endp->
1964 bEndpointAddress & 0x7F),
1965 serial->tx_data, serial->tx_data_count,
1966 hso_std_serial_write_bulk_callback, serial);
1967
1968 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1969 if (result) {
1970 dev_warn(&serial->parent->usb->dev,
1971 "Failed to submit urb - res %d\n", result);
1972 return result;
1973 }
1974
1975 return count;
1976}
1977
1978/* callback after read or write on muxed serial port */
1979static void ctrl_callback(struct urb *urb)
1980{
1981 struct hso_serial *serial = urb->context;
1982 struct usb_ctrlrequest *req;
1983 int status = urb->status;
1984
1985 /* sanity check */
1986 if (!serial)
1987 return;
1988
1989 spin_lock(&serial->serial_lock);
1990 serial->tx_urb_used = 0;
1991 spin_unlock(&serial->serial_lock);
1992 if (status) {
1993 handle_usb_error(status, __func__, serial->parent);
1994 return;
1995 }
1996
1997 /* what request? */
1998 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1999 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2000 D4("Actual length of urb = %d\n", urb->actual_length);
2001 DUMP1(urb->transfer_buffer, urb->actual_length);
2002
2003 if (req->bRequestType ==
2004 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2005 /* response to a read command */
2006 serial->rx_urb_filled[0] = 1;
2007 spin_lock(&serial->serial_lock);
2008 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2009 spin_unlock(&serial->serial_lock);
2010 } else {
2011 hso_put_activity(serial->parent);
2012 tty_port_tty_wakeup(&serial->port);
2013 /* response to a write command */
2014 hso_kick_transmit(serial);
2015 }
2016}
2017
2018/* handle RX data for serial port */
2019static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2020{
2021 struct tty_struct *tty;
2022 int count;
2023
2024 /* Sanity check */
2025 if (urb == NULL || serial == NULL) {
2026 D1("serial = NULL");
2027 return -2;
2028 }
2029
2030 tty = tty_port_tty_get(&serial->port);
2031
2032 if (tty && test_bit(TTY_THROTTLED, &tty->flags)) {
2033 tty_kref_put(tty);
2034 return -1;
2035 }
2036
2037 /* Push data to tty */
2038 D1("data to push to tty");
2039 count = tty_buffer_request_room(&serial->port, urb->actual_length);
2040 if (count >= urb->actual_length) {
2041 tty_insert_flip_string(&serial->port, urb->transfer_buffer,
2042 urb->actual_length);
2043 tty_flip_buffer_push(&serial->port);
2044 } else {
2045 dev_warn(&serial->parent->usb->dev,
2046 "dropping data, %d bytes lost\n", urb->actual_length);
2047 }
2048
2049 tty_kref_put(tty);
2050
2051 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2052
2053 return 0;
2054}
2055
2056
2057/* Base driver functions */
2058
2059static void hso_log_port(struct hso_device *hso_dev)
2060{
2061 char *port_type;
2062 char port_dev[20];
2063
2064 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2065 case HSO_PORT_CONTROL:
2066 port_type = "Control";
2067 break;
2068 case HSO_PORT_APP:
2069 port_type = "Application";
2070 break;
2071 case HSO_PORT_GPS:
2072 port_type = "GPS";
2073 break;
2074 case HSO_PORT_GPS_CONTROL:
2075 port_type = "GPS control";
2076 break;
2077 case HSO_PORT_APP2:
2078 port_type = "Application2";
2079 break;
2080 case HSO_PORT_PCSC:
2081 port_type = "PCSC";
2082 break;
2083 case HSO_PORT_DIAG:
2084 port_type = "Diagnostic";
2085 break;
2086 case HSO_PORT_DIAG2:
2087 port_type = "Diagnostic2";
2088 break;
2089 case HSO_PORT_MODEM:
2090 port_type = "Modem";
2091 break;
2092 case HSO_PORT_NETWORK:
2093 port_type = "Network";
2094 break;
2095 default:
2096 port_type = "Unknown";
2097 break;
2098 }
2099 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2100 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2101 } else
2102 sprintf(port_dev, "/dev/%s%d", tty_filename,
2103 dev2ser(hso_dev)->minor);
2104
2105 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2106 port_type, port_dev);
2107}
2108
2109static int hso_start_net_device(struct hso_device *hso_dev)
2110{
2111 int i, result = 0;
2112 struct hso_net *hso_net = dev2net(hso_dev);
2113
2114 if (!hso_net)
2115 return -ENODEV;
2116
2117 /* send URBs for all read buffers */
2118 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2119
2120 /* Prep a receive URB */
2121 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2122 hso_dev->usb,
2123 usb_rcvbulkpipe(hso_dev->usb,
2124 hso_net->in_endp->
2125 bEndpointAddress & 0x7F),
2126 hso_net->mux_bulk_rx_buf_pool[i],
2127 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2128 hso_net);
2129
2130 /* Put it out there so the device can send us stuff */
2131 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2132 GFP_NOIO);
2133 if (result)
2134 dev_warn(&hso_dev->usb->dev,
2135 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2136 i, result);
2137 }
2138
2139 return result;
2140}
2141
2142static int hso_stop_net_device(struct hso_device *hso_dev)
2143{
2144 int i;
2145 struct hso_net *hso_net = dev2net(hso_dev);
2146
2147 if (!hso_net)
2148 return -ENODEV;
2149
2150 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2151 if (hso_net->mux_bulk_rx_urb_pool[i])
2152 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2153
2154 }
2155 if (hso_net->mux_bulk_tx_urb)
2156 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2157
2158 return 0;
2159}
2160
2161static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2162{
2163 int i, result = 0;
2164 struct hso_serial *serial = dev2ser(hso_dev);
2165
2166 if (!serial)
2167 return -ENODEV;
2168
2169 /* If it is not the MUX port fill in and submit a bulk urb (already
2170 * allocated in hso_serial_start) */
2171 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2172 for (i = 0; i < serial->num_rx_urbs; i++) {
2173 usb_fill_bulk_urb(serial->rx_urb[i],
2174 serial->parent->usb,
2175 usb_rcvbulkpipe(serial->parent->usb,
2176 serial->in_endp->
2177 bEndpointAddress &
2178 0x7F),
2179 serial->rx_data[i],
2180 serial->rx_data_length,
2181 hso_std_serial_read_bulk_callback,
2182 serial);
2183 result = usb_submit_urb(serial->rx_urb[i], flags);
2184 if (result) {
2185 dev_warn(&serial->parent->usb->dev,
2186 "Failed to submit urb - res %d\n",
2187 result);
2188 break;
2189 }
2190 }
2191 } else {
2192 mutex_lock(&serial->shared_int->shared_int_lock);
2193 if (!serial->shared_int->use_count) {
2194 result =
2195 hso_mux_submit_intr_urb(serial->shared_int,
2196 hso_dev->usb, flags);
2197 }
2198 serial->shared_int->use_count++;
2199 mutex_unlock(&serial->shared_int->shared_int_lock);
2200 }
2201 if (serial->tiocmget)
2202 tiocmget_submit_urb(serial,
2203 serial->tiocmget,
2204 serial->parent->usb);
2205 return result;
2206}
2207
2208static int hso_stop_serial_device(struct hso_device *hso_dev)
2209{
2210 int i;
2211 struct hso_serial *serial = dev2ser(hso_dev);
2212 struct hso_tiocmget *tiocmget;
2213
2214 if (!serial)
2215 return -ENODEV;
2216
2217 for (i = 0; i < serial->num_rx_urbs; i++) {
2218 if (serial->rx_urb[i]) {
2219 usb_kill_urb(serial->rx_urb[i]);
2220 serial->rx_urb_filled[i] = 0;
2221 }
2222 }
2223 serial->curr_rx_urb_idx = 0;
2224
2225 if (serial->tx_urb)
2226 usb_kill_urb(serial->tx_urb);
2227
2228 if (serial->shared_int) {
2229 mutex_lock(&serial->shared_int->shared_int_lock);
2230 if (serial->shared_int->use_count &&
2231 (--serial->shared_int->use_count == 0)) {
2232 struct urb *urb;
2233
2234 urb = serial->shared_int->shared_intr_urb;
2235 if (urb)
2236 usb_kill_urb(urb);
2237 }
2238 mutex_unlock(&serial->shared_int->shared_int_lock);
2239 }
2240 tiocmget = serial->tiocmget;
2241 if (tiocmget) {
2242 wake_up_interruptible(&tiocmget->waitq);
2243 usb_kill_urb(tiocmget->urb);
2244 }
2245
2246 return 0;
2247}
2248
2249static void hso_serial_tty_unregister(struct hso_serial *serial)
2250{
2251 tty_unregister_device(tty_drv, serial->minor);
2252}
2253
2254static void hso_serial_common_free(struct hso_serial *serial)
2255{
2256 int i;
2257
2258 for (i = 0; i < serial->num_rx_urbs; i++) {
2259 /* unlink and free RX URB */
2260 usb_free_urb(serial->rx_urb[i]);
2261 /* free the RX buffer */
2262 kfree(serial->rx_data[i]);
2263 }
2264
2265 /* unlink and free TX URB */
2266 usb_free_urb(serial->tx_urb);
2267 kfree(serial->tx_buffer);
2268 kfree(serial->tx_data);
2269 tty_port_destroy(&serial->port);
2270}
2271
2272static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2273 int rx_size, int tx_size)
2274{
2275 struct device *dev;
2276 int minor;
2277 int i;
2278
2279 tty_port_init(&serial->port);
2280
2281 minor = get_free_serial_index();
2282 if (minor < 0)
2283 goto exit;
2284
2285 /* register our minor number */
2286 serial->parent->dev = tty_port_register_device_attr(&serial->port,
2287 tty_drv, minor, &serial->parent->interface->dev,
2288 serial->parent, hso_serial_dev_groups);
2289 dev = serial->parent->dev;
2290
2291 /* fill in specific data for later use */
2292 serial->minor = minor;
2293 serial->magic = HSO_SERIAL_MAGIC;
2294 spin_lock_init(&serial->serial_lock);
2295 serial->num_rx_urbs = num_urbs;
2296
2297 /* RX, allocate urb and initialize */
2298
2299 /* prepare our RX buffer */
2300 serial->rx_data_length = rx_size;
2301 for (i = 0; i < serial->num_rx_urbs; i++) {
2302 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2303 if (!serial->rx_urb[i]) {
2304 dev_err(dev, "Could not allocate urb?\n");
2305 goto exit;
2306 }
2307 serial->rx_urb[i]->transfer_buffer = NULL;
2308 serial->rx_urb[i]->transfer_buffer_length = 0;
2309 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2310 GFP_KERNEL);
2311 if (!serial->rx_data[i])
2312 goto exit;
2313 }
2314
2315 /* TX, allocate urb and initialize */
2316 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2317 if (!serial->tx_urb) {
2318 dev_err(dev, "Could not allocate urb?\n");
2319 goto exit;
2320 }
2321 serial->tx_urb->transfer_buffer = NULL;
2322 serial->tx_urb->transfer_buffer_length = 0;
2323 /* prepare our TX buffer */
2324 serial->tx_data_count = 0;
2325 serial->tx_buffer_count = 0;
2326 serial->tx_data_length = tx_size;
2327 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2328 if (!serial->tx_data)
2329 goto exit;
2330
2331 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2332 if (!serial->tx_buffer)
2333 goto exit;
2334
2335 return 0;
2336exit:
2337 hso_serial_tty_unregister(serial);
2338 hso_serial_common_free(serial);
2339 return -1;
2340}
2341
2342/* Creates a general hso device */
2343static struct hso_device *hso_create_device(struct usb_interface *intf,
2344 int port_spec)
2345{
2346 struct hso_device *hso_dev;
2347
2348 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2349 if (!hso_dev)
2350 return NULL;
2351
2352 hso_dev->port_spec = port_spec;
2353 hso_dev->usb = interface_to_usbdev(intf);
2354 hso_dev->interface = intf;
2355 kref_init(&hso_dev->ref);
2356 mutex_init(&hso_dev->mutex);
2357
2358 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2359 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2360
2361 return hso_dev;
2362}
2363
2364/* Removes a network device in the network device table */
2365static int remove_net_device(struct hso_device *hso_dev)
2366{
2367 int i;
2368
2369 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2370 if (network_table[i] == hso_dev) {
2371 network_table[i] = NULL;
2372 break;
2373 }
2374 }
2375 if (i == HSO_MAX_NET_DEVICES)
2376 return -1;
2377 return 0;
2378}
2379
2380/* Frees our network device */
2381static void hso_free_net_device(struct hso_device *hso_dev)
2382{
2383 int i;
2384 struct hso_net *hso_net = dev2net(hso_dev);
2385
2386 if (!hso_net)
2387 return;
2388
2389 remove_net_device(hso_net->parent);
2390
2391 if (hso_net->net)
2392 unregister_netdev(hso_net->net);
2393
2394 /* start freeing */
2395 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2396 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2397 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2398 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2399 }
2400 usb_free_urb(hso_net->mux_bulk_tx_urb);
2401 kfree(hso_net->mux_bulk_tx_buf);
2402 hso_net->mux_bulk_tx_buf = NULL;
2403
2404 if (hso_net->net)
2405 free_netdev(hso_net->net);
2406
2407 kfree(hso_dev);
2408}
2409
2410static const struct net_device_ops hso_netdev_ops = {
2411 .ndo_open = hso_net_open,
2412 .ndo_stop = hso_net_close,
2413 .ndo_start_xmit = hso_net_start_xmit,
2414 .ndo_tx_timeout = hso_net_tx_timeout,
2415};
2416
2417/* initialize the network interface */
2418static void hso_net_init(struct net_device *net)
2419{
2420 struct hso_net *hso_net = netdev_priv(net);
2421
2422 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2423
2424 /* fill in the other fields */
2425 net->netdev_ops = &hso_netdev_ops;
2426 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2427 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2428 net->type = ARPHRD_NONE;
2429 net->mtu = DEFAULT_MTU - 14;
2430 net->tx_queue_len = 10;
2431 net->ethtool_ops = &ops;
2432
2433 /* and initialize the semaphore */
2434 spin_lock_init(&hso_net->net_lock);
2435}
2436
2437/* Adds a network device in the network device table */
2438static int add_net_device(struct hso_device *hso_dev)
2439{
2440 int i;
2441
2442 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2443 if (network_table[i] == NULL) {
2444 network_table[i] = hso_dev;
2445 break;
2446 }
2447 }
2448 if (i == HSO_MAX_NET_DEVICES)
2449 return -1;
2450 return 0;
2451}
2452
2453static int hso_rfkill_set_block(void *data, bool blocked)
2454{
2455 struct hso_device *hso_dev = data;
2456 int enabled = !blocked;
2457 int rv;
2458
2459 mutex_lock(&hso_dev->mutex);
2460 if (hso_dev->usb_gone)
2461 rv = 0;
2462 else
2463 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2464 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2465 USB_CTRL_SET_TIMEOUT);
2466 mutex_unlock(&hso_dev->mutex);
2467 return rv;
2468}
2469
2470static const struct rfkill_ops hso_rfkill_ops = {
2471 .set_block = hso_rfkill_set_block,
2472};
2473
2474/* Creates and sets up everything for rfkill */
2475static void hso_create_rfkill(struct hso_device *hso_dev,
2476 struct usb_interface *interface)
2477{
2478 struct hso_net *hso_net = dev2net(hso_dev);
2479 struct device *dev = &hso_net->net->dev;
2480 static u32 rfkill_counter;
2481
2482 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d",
2483 rfkill_counter++);
2484
2485 hso_net->rfkill = rfkill_alloc(hso_net->name,
2486 &interface_to_usbdev(interface)->dev,
2487 RFKILL_TYPE_WWAN,
2488 &hso_rfkill_ops, hso_dev);
2489 if (!hso_net->rfkill) {
2490 dev_err(dev, "%s - Out of memory\n", __func__);
2491 return;
2492 }
2493 if (rfkill_register(hso_net->rfkill) < 0) {
2494 rfkill_destroy(hso_net->rfkill);
2495 hso_net->rfkill = NULL;
2496 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2497 return;
2498 }
2499}
2500
2501static struct device_type hso_type = {
2502 .name = "wwan",
2503};
2504
2505/* Creates our network device */
2506static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2507 int port_spec)
2508{
2509 int result, i;
2510 struct net_device *net;
2511 struct hso_net *hso_net;
2512 struct hso_device *hso_dev;
2513
2514 hso_dev = hso_create_device(interface, port_spec);
2515 if (!hso_dev)
2516 return NULL;
2517
2518 /* allocate our network device, then we can put in our private data */
2519 /* call hso_net_init to do the basic initialization */
2520 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN,
2521 hso_net_init);
2522 if (!net) {
2523 dev_err(&interface->dev, "Unable to create ethernet device\n");
2524 goto exit;
2525 }
2526
2527 hso_net = netdev_priv(net);
2528
2529 hso_dev->port_data.dev_net = hso_net;
2530 hso_net->net = net;
2531 hso_net->parent = hso_dev;
2532
2533 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2534 USB_DIR_IN);
2535 if (!hso_net->in_endp) {
2536 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2537 goto exit;
2538 }
2539 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2540 USB_DIR_OUT);
2541 if (!hso_net->out_endp) {
2542 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2543 goto exit;
2544 }
2545 SET_NETDEV_DEV(net, &interface->dev);
2546 SET_NETDEV_DEVTYPE(net, &hso_type);
2547
2548 /* registering our net device */
2549 result = register_netdev(net);
2550 if (result) {
2551 dev_err(&interface->dev, "Failed to register device\n");
2552 goto exit;
2553 }
2554
2555 /* start allocating */
2556 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2557 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2558 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2559 dev_err(&interface->dev, "Could not allocate rx urb\n");
2560 goto exit;
2561 }
2562 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2563 GFP_KERNEL);
2564 if (!hso_net->mux_bulk_rx_buf_pool[i])
2565 goto exit;
2566 }
2567 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2568 if (!hso_net->mux_bulk_tx_urb) {
2569 dev_err(&interface->dev, "Could not allocate tx urb\n");
2570 goto exit;
2571 }
2572 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2573 if (!hso_net->mux_bulk_tx_buf)
2574 goto exit;
2575
2576 add_net_device(hso_dev);
2577
2578 hso_log_port(hso_dev);
2579
2580 hso_create_rfkill(hso_dev, interface);
2581
2582 return hso_dev;
2583exit:
2584 hso_free_net_device(hso_dev);
2585 return NULL;
2586}
2587
2588static void hso_free_tiomget(struct hso_serial *serial)
2589{
2590 struct hso_tiocmget *tiocmget;
2591 if (!serial)
2592 return;
2593 tiocmget = serial->tiocmget;
2594 if (tiocmget) {
2595 usb_free_urb(tiocmget->urb);
2596 tiocmget->urb = NULL;
2597 serial->tiocmget = NULL;
2598 kfree(tiocmget);
2599 }
2600}
2601
2602/* Frees an AT channel ( goes for both mux and non-mux ) */
2603static void hso_free_serial_device(struct hso_device *hso_dev)
2604{
2605 struct hso_serial *serial = dev2ser(hso_dev);
2606
2607 if (!serial)
2608 return;
2609
2610 hso_serial_common_free(serial);
2611
2612 if (serial->shared_int) {
2613 mutex_lock(&serial->shared_int->shared_int_lock);
2614 if (--serial->shared_int->ref_count == 0)
2615 hso_free_shared_int(serial->shared_int);
2616 else
2617 mutex_unlock(&serial->shared_int->shared_int_lock);
2618 }
2619 hso_free_tiomget(serial);
2620 kfree(serial);
2621 kfree(hso_dev);
2622}
2623
2624/* Creates a bulk AT channel */
2625static struct hso_device *hso_create_bulk_serial_device(
2626 struct usb_interface *interface, int port)
2627{
2628 struct hso_device *hso_dev;
2629 struct hso_serial *serial;
2630 int num_urbs;
2631 struct hso_tiocmget *tiocmget;
2632
2633 hso_dev = hso_create_device(interface, port);
2634 if (!hso_dev)
2635 return NULL;
2636
2637 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2638 if (!serial)
2639 goto exit;
2640
2641 serial->parent = hso_dev;
2642 hso_dev->port_data.dev_serial = serial;
2643
2644 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2645 num_urbs = 2;
2646 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2647 GFP_KERNEL);
2648 /* it isn't going to break our heart if serial->tiocmget
2649 * allocation fails don't bother checking this.
2650 */
2651 if (serial->tiocmget) {
2652 tiocmget = serial->tiocmget;
2653 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2654 if (tiocmget->urb) {
2655 mutex_init(&tiocmget->mutex);
2656 init_waitqueue_head(&tiocmget->waitq);
2657 tiocmget->endp = hso_get_ep(
2658 interface,
2659 USB_ENDPOINT_XFER_INT,
2660 USB_DIR_IN);
2661 } else
2662 hso_free_tiomget(serial);
2663 }
2664 }
2665 else
2666 num_urbs = 1;
2667
2668 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2669 BULK_URB_TX_SIZE))
2670 goto exit;
2671
2672 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2673 USB_DIR_IN);
2674 if (!serial->in_endp) {
2675 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2676 goto exit2;
2677 }
2678
2679 if (!
2680 (serial->out_endp =
2681 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2682 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2683 goto exit2;
2684 }
2685
2686 serial->write_data = hso_std_serial_write_data;
2687
2688 /* and record this serial */
2689 set_serial_by_index(serial->minor, serial);
2690
2691 /* setup the proc dirs and files if needed */
2692 hso_log_port(hso_dev);
2693
2694 /* done, return it */
2695 return hso_dev;
2696
2697exit2:
2698 hso_serial_tty_unregister(serial);
2699 hso_serial_common_free(serial);
2700exit:
2701 hso_free_tiomget(serial);
2702 kfree(serial);
2703 kfree(hso_dev);
2704 return NULL;
2705}
2706
2707/* Creates a multiplexed AT channel */
2708static
2709struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2710 int port,
2711 struct hso_shared_int *mux)
2712{
2713 struct hso_device *hso_dev;
2714 struct hso_serial *serial;
2715 int port_spec;
2716
2717 port_spec = HSO_INTF_MUX;
2718 port_spec &= ~HSO_PORT_MASK;
2719
2720 port_spec |= hso_mux_to_port(port);
2721 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2722 return NULL;
2723
2724 hso_dev = hso_create_device(interface, port_spec);
2725 if (!hso_dev)
2726 return NULL;
2727
2728 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2729 if (!serial)
2730 goto exit;
2731
2732 hso_dev->port_data.dev_serial = serial;
2733 serial->parent = hso_dev;
2734
2735 if (hso_serial_common_create
2736 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2737 goto exit;
2738
2739 serial->tx_data_length--;
2740 serial->write_data = hso_mux_serial_write_data;
2741
2742 serial->shared_int = mux;
2743 mutex_lock(&serial->shared_int->shared_int_lock);
2744 serial->shared_int->ref_count++;
2745 mutex_unlock(&serial->shared_int->shared_int_lock);
2746
2747 /* and record this serial */
2748 set_serial_by_index(serial->minor, serial);
2749
2750 /* setup the proc dirs and files if needed */
2751 hso_log_port(hso_dev);
2752
2753 /* done, return it */
2754 return hso_dev;
2755
2756exit:
2757 if (serial) {
2758 tty_unregister_device(tty_drv, serial->minor);
2759 kfree(serial);
2760 }
2761 kfree(hso_dev);
2762 return NULL;
2763
2764}
2765
2766static void hso_free_shared_int(struct hso_shared_int *mux)
2767{
2768 usb_free_urb(mux->shared_intr_urb);
2769 kfree(mux->shared_intr_buf);
2770 mutex_unlock(&mux->shared_int_lock);
2771 kfree(mux);
2772}
2773
2774static
2775struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2776{
2777 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2778
2779 if (!mux)
2780 return NULL;
2781
2782 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2783 USB_DIR_IN);
2784 if (!mux->intr_endp) {
2785 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2786 goto exit;
2787 }
2788
2789 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2790 if (!mux->shared_intr_urb) {
2791 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2792 goto exit;
2793 }
2794 mux->shared_intr_buf =
2795 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2796 GFP_KERNEL);
2797 if (!mux->shared_intr_buf)
2798 goto exit;
2799
2800 mutex_init(&mux->shared_int_lock);
2801
2802 return mux;
2803
2804exit:
2805 kfree(mux->shared_intr_buf);
2806 usb_free_urb(mux->shared_intr_urb);
2807 kfree(mux);
2808 return NULL;
2809}
2810
2811/* Gets the port spec for a certain interface */
2812static int hso_get_config_data(struct usb_interface *interface)
2813{
2814 struct usb_device *usbdev = interface_to_usbdev(interface);
2815 u8 *config_data = kmalloc(17, GFP_KERNEL);
2816 u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2817 s32 result;
2818
2819 if (!config_data)
2820 return -ENOMEM;
2821 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2822 0x86, 0xC0, 0, 0, config_data, 17,
2823 USB_CTRL_SET_TIMEOUT) != 0x11) {
2824 kfree(config_data);
2825 return -EIO;
2826 }
2827
2828 switch (config_data[if_num]) {
2829 case 0x0:
2830 result = 0;
2831 break;
2832 case 0x1:
2833 result = HSO_PORT_DIAG;
2834 break;
2835 case 0x2:
2836 result = HSO_PORT_GPS;
2837 break;
2838 case 0x3:
2839 result = HSO_PORT_GPS_CONTROL;
2840 break;
2841 case 0x4:
2842 result = HSO_PORT_APP;
2843 break;
2844 case 0x5:
2845 result = HSO_PORT_APP2;
2846 break;
2847 case 0x6:
2848 result = HSO_PORT_CONTROL;
2849 break;
2850 case 0x7:
2851 result = HSO_PORT_NETWORK;
2852 break;
2853 case 0x8:
2854 result = HSO_PORT_MODEM;
2855 break;
2856 case 0x9:
2857 result = HSO_PORT_MSD;
2858 break;
2859 case 0xa:
2860 result = HSO_PORT_PCSC;
2861 break;
2862 case 0xb:
2863 result = HSO_PORT_VOICE;
2864 break;
2865 default:
2866 result = 0;
2867 }
2868
2869 if (result)
2870 result |= HSO_INTF_BULK;
2871
2872 if (config_data[16] & 0x1)
2873 result |= HSO_INFO_CRC_BUG;
2874
2875 kfree(config_data);
2876 return result;
2877}
2878
2879/* called once for each interface upon device insertion */
2880static int hso_probe(struct usb_interface *interface,
2881 const struct usb_device_id *id)
2882{
2883 int mux, i, if_num, port_spec;
2884 unsigned char port_mask;
2885 struct hso_device *hso_dev = NULL;
2886 struct hso_shared_int *shared_int;
2887 struct hso_device *tmp_dev = NULL;
2888
2889 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2890 dev_err(&interface->dev, "Not our interface\n");
2891 return -ENODEV;
2892 }
2893
2894 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2895
2896 /* Get the interface/port specification from either driver_info or from
2897 * the device itself */
2898 if (id->driver_info)
2899 port_spec = ((u32 *)(id->driver_info))[if_num];
2900 else
2901 port_spec = hso_get_config_data(interface);
2902
2903 /* Check if we need to switch to alt interfaces prior to port
2904 * configuration */
2905 if (interface->num_altsetting > 1)
2906 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2907 interface->needs_remote_wakeup = 1;
2908
2909 /* Allocate new hso device(s) */
2910 switch (port_spec & HSO_INTF_MASK) {
2911 case HSO_INTF_MUX:
2912 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2913 /* Create the network device */
2914 if (!disable_net) {
2915 hso_dev = hso_create_net_device(interface,
2916 port_spec);
2917 if (!hso_dev)
2918 goto exit;
2919 tmp_dev = hso_dev;
2920 }
2921 }
2922
2923 if (hso_get_mux_ports(interface, &port_mask))
2924 /* TODO: de-allocate everything */
2925 goto exit;
2926
2927 shared_int = hso_create_shared_int(interface);
2928 if (!shared_int)
2929 goto exit;
2930
2931 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2932 if (port_mask & i) {
2933 hso_dev = hso_create_mux_serial_device(
2934 interface, i, shared_int);
2935 if (!hso_dev)
2936 goto exit;
2937 }
2938 }
2939
2940 if (tmp_dev)
2941 hso_dev = tmp_dev;
2942 break;
2943
2944 case HSO_INTF_BULK:
2945 /* It's a regular bulk interface */
2946 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2947 if (!disable_net)
2948 hso_dev =
2949 hso_create_net_device(interface, port_spec);
2950 } else {
2951 hso_dev =
2952 hso_create_bulk_serial_device(interface, port_spec);
2953 }
2954 if (!hso_dev)
2955 goto exit;
2956 break;
2957 default:
2958 goto exit;
2959 }
2960
2961 /* save our data pointer in this device */
2962 usb_set_intfdata(interface, hso_dev);
2963
2964 /* done */
2965 return 0;
2966exit:
2967 hso_free_interface(interface);
2968 return -ENODEV;
2969}
2970
2971/* device removed, cleaning up */
2972static void hso_disconnect(struct usb_interface *interface)
2973{
2974 hso_free_interface(interface);
2975
2976 /* remove reference of our private data */
2977 usb_set_intfdata(interface, NULL);
2978}
2979
2980static void async_get_intf(struct work_struct *data)
2981{
2982 struct hso_device *hso_dev =
2983 container_of(data, struct hso_device, async_get_intf);
2984 usb_autopm_get_interface(hso_dev->interface);
2985}
2986
2987static void async_put_intf(struct work_struct *data)
2988{
2989 struct hso_device *hso_dev =
2990 container_of(data, struct hso_device, async_put_intf);
2991 usb_autopm_put_interface(hso_dev->interface);
2992}
2993
2994static int hso_get_activity(struct hso_device *hso_dev)
2995{
2996 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2997 if (!hso_dev->is_active) {
2998 hso_dev->is_active = 1;
2999 schedule_work(&hso_dev->async_get_intf);
3000 }
3001 }
3002
3003 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3004 return -EAGAIN;
3005
3006 usb_mark_last_busy(hso_dev->usb);
3007
3008 return 0;
3009}
3010
3011static int hso_put_activity(struct hso_device *hso_dev)
3012{
3013 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3014 if (hso_dev->is_active) {
3015 hso_dev->is_active = 0;
3016 schedule_work(&hso_dev->async_put_intf);
3017 return -EAGAIN;
3018 }
3019 }
3020 hso_dev->is_active = 0;
3021 return 0;
3022}
3023
3024/* called by kernel when we need to suspend device */
3025static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3026{
3027 int i, result;
3028
3029 /* Stop all serial ports */
3030 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3031 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3032 result = hso_stop_serial_device(serial_table[i]);
3033 if (result)
3034 goto out;
3035 }
3036 }
3037
3038 /* Stop all network ports */
3039 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3040 if (network_table[i] &&
3041 (network_table[i]->interface == iface)) {
3042 result = hso_stop_net_device(network_table[i]);
3043 if (result)
3044 goto out;
3045 }
3046 }
3047
3048out:
3049 return 0;
3050}
3051
3052/* called by kernel when we need to resume device */
3053static int hso_resume(struct usb_interface *iface)
3054{
3055 int i, result = 0;
3056 struct hso_net *hso_net;
3057
3058 /* Start all serial ports */
3059 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3060 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3061 if (dev2ser(serial_table[i])->port.count) {
3062 result =
3063 hso_start_serial_device(serial_table[i], GFP_NOIO);
3064 hso_kick_transmit(dev2ser(serial_table[i]));
3065 if (result)
3066 goto out;
3067 }
3068 }
3069 }
3070
3071 /* Start all network ports */
3072 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3073 if (network_table[i] &&
3074 (network_table[i]->interface == iface)) {
3075 hso_net = dev2net(network_table[i]);
3076 if (hso_net->flags & IFF_UP) {
3077 /* First transmit any lingering data,
3078 then restart the device. */
3079 if (hso_net->skb_tx_buf) {
3080 dev_dbg(&iface->dev,
3081 "Transmitting"
3082 " lingering data\n");
3083 hso_net_start_xmit(hso_net->skb_tx_buf,
3084 hso_net->net);
3085 hso_net->skb_tx_buf = NULL;
3086 }
3087 result = hso_start_net_device(network_table[i]);
3088 if (result)
3089 goto out;
3090 }
3091 }
3092 }
3093
3094out:
3095 return result;
3096}
3097
3098static void hso_serial_ref_free(struct kref *ref)
3099{
3100 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3101
3102 hso_free_serial_device(hso_dev);
3103}
3104
3105static void hso_free_interface(struct usb_interface *interface)
3106{
3107 struct hso_serial *serial;
3108 int i;
3109
3110 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3111 if (serial_table[i] &&
3112 (serial_table[i]->interface == interface)) {
3113 serial = dev2ser(serial_table[i]);
3114 tty_port_tty_hangup(&serial->port, false);
3115 mutex_lock(&serial->parent->mutex);
3116 serial->parent->usb_gone = 1;
3117 mutex_unlock(&serial->parent->mutex);
3118 cancel_work_sync(&serial_table[i]->async_put_intf);
3119 cancel_work_sync(&serial_table[i]->async_get_intf);
3120 hso_serial_tty_unregister(serial);
3121 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3122 set_serial_by_index(i, NULL);
3123 }
3124 }
3125
3126 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3127 if (network_table[i] &&
3128 (network_table[i]->interface == interface)) {
3129 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3130 /* hso_stop_net_device doesn't stop the net queue since
3131 * traffic needs to start it again when suspended */
3132 netif_stop_queue(dev2net(network_table[i])->net);
3133 hso_stop_net_device(network_table[i]);
3134 cancel_work_sync(&network_table[i]->async_put_intf);
3135 cancel_work_sync(&network_table[i]->async_get_intf);
3136 if (rfk) {
3137 rfkill_unregister(rfk);
3138 rfkill_destroy(rfk);
3139 }
3140 hso_free_net_device(network_table[i]);
3141 }
3142 }
3143}
3144
3145/* Helper functions */
3146
3147/* Get the endpoint ! */
3148static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3149 int type, int dir)
3150{
3151 int i;
3152 struct usb_host_interface *iface = intf->cur_altsetting;
3153 struct usb_endpoint_descriptor *endp;
3154
3155 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3156 endp = &iface->endpoint[i].desc;
3157 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3158 (usb_endpoint_type(endp) == type))
3159 return endp;
3160 }
3161
3162 return NULL;
3163}
3164
3165/* Get the byte that describes which ports are enabled */
3166static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3167{
3168 int i;
3169 struct usb_host_interface *iface = intf->cur_altsetting;
3170
3171 if (iface->extralen == 3) {
3172 *ports = iface->extra[2];
3173 return 0;
3174 }
3175
3176 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3177 if (iface->endpoint[i].extralen == 3) {
3178 *ports = iface->endpoint[i].extra[2];
3179 return 0;
3180 }
3181 }
3182
3183 return -1;
3184}
3185
3186/* interrupt urb needs to be submitted, used for serial read of muxed port */
3187static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3188 struct usb_device *usb, gfp_t gfp)
3189{
3190 int result;
3191
3192 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3193 usb_rcvintpipe(usb,
3194 shared_int->intr_endp->bEndpointAddress & 0x7F),
3195 shared_int->shared_intr_buf,
3196 1,
3197 intr_callback, shared_int,
3198 shared_int->intr_endp->bInterval);
3199
3200 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3201 if (result)
3202 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3203 result);
3204
3205 return result;
3206}
3207
3208/* operations setup of the serial interface */
3209static const struct tty_operations hso_serial_ops = {
3210 .open = hso_serial_open,
3211 .close = hso_serial_close,
3212 .write = hso_serial_write,
3213 .write_room = hso_serial_write_room,
3214 .cleanup = hso_serial_cleanup,
3215 .ioctl = hso_serial_ioctl,
3216 .set_termios = hso_serial_set_termios,
3217 .chars_in_buffer = hso_serial_chars_in_buffer,
3218 .tiocmget = hso_serial_tiocmget,
3219 .tiocmset = hso_serial_tiocmset,
3220 .get_icount = hso_get_count,
3221 .unthrottle = hso_unthrottle
3222};
3223
3224static struct usb_driver hso_driver = {
3225 .name = driver_name,
3226 .probe = hso_probe,
3227 .disconnect = hso_disconnect,
3228 .id_table = hso_ids,
3229 .suspend = hso_suspend,
3230 .resume = hso_resume,
3231 .reset_resume = hso_resume,
3232 .supports_autosuspend = 1,
3233 .disable_hub_initiated_lpm = 1,
3234};
3235
3236static int __init hso_init(void)
3237{
3238 int i;
3239 int result;
3240
3241 /* put it in the log */
3242 printk(KERN_INFO "hso: %s\n", version);
3243
3244 /* Initialise the serial table semaphore and table */
3245 spin_lock_init(&serial_table_lock);
3246 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3247 serial_table[i] = NULL;
3248
3249 /* allocate our driver using the proper amount of supported minors */
3250 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3251 if (!tty_drv)
3252 return -ENOMEM;
3253
3254 /* fill in all needed values */
3255 tty_drv->driver_name = driver_name;
3256 tty_drv->name = tty_filename;
3257
3258 /* if major number is provided as parameter, use that one */
3259 if (tty_major)
3260 tty_drv->major = tty_major;
3261
3262 tty_drv->minor_start = 0;
3263 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3264 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3265 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3266 tty_drv->init_termios = tty_std_termios;
3267 hso_init_termios(&tty_drv->init_termios);
3268 tty_set_operations(tty_drv, &hso_serial_ops);
3269
3270 /* register the tty driver */
3271 result = tty_register_driver(tty_drv);
3272 if (result) {
3273 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3274 __func__, result);
3275 goto err_free_tty;
3276 }
3277
3278 /* register this module as an usb driver */
3279 result = usb_register(&hso_driver);
3280 if (result) {
3281 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3282 result);
3283 goto err_unreg_tty;
3284 }
3285
3286 /* done */
3287 return 0;
3288err_unreg_tty:
3289 tty_unregister_driver(tty_drv);
3290err_free_tty:
3291 put_tty_driver(tty_drv);
3292 return result;
3293}
3294
3295static void __exit hso_exit(void)
3296{
3297 printk(KERN_INFO "hso: unloaded\n");
3298
3299 tty_unregister_driver(tty_drv);
3300 put_tty_driver(tty_drv);
3301 /* deregister the usb driver */
3302 usb_deregister(&hso_driver);
3303}
3304
3305/* Module definitions */
3306module_init(hso_init);
3307module_exit(hso_exit);
3308
3309MODULE_AUTHOR(MOD_AUTHOR);
3310MODULE_DESCRIPTION(MOD_DESCRIPTION);
3311MODULE_LICENSE(MOD_LICENSE);
3312
3313/* change the debug level (eg: insmod hso.ko debug=0x04) */
3314MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3315module_param(debug, int, S_IRUGO | S_IWUSR);
3316
3317/* set the major tty number (eg: insmod hso.ko tty_major=245) */
3318MODULE_PARM_DESC(tty_major, "Set the major tty number");
3319module_param(tty_major, int, S_IRUGO | S_IWUSR);
3320
3321/* disable network interface (eg: insmod hso.ko disable_net=1) */
3322MODULE_PARM_DESC(disable_net, "Disable the network interface");
3323module_param(disable_net, int, S_IRUGO | S_IWUSR);