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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/timer.h>
62#include <linux/tty.h>
63#include <linux/tty_driver.h>
64#include <linux/tty_flip.h>
65#include <linux/kmod.h>
66#include <linux/rfkill.h>
67#include <linux/ip.h>
68#include <linux/uaccess.h>
69#include <linux/usb/cdc.h>
70#include <net/arp.h>
71#include <asm/byteorder.h>
72#include <linux/serial_core.h>
73#include <linux/serial.h>
74
75
76#define MOD_AUTHOR "Option Wireless"
77#define MOD_DESCRIPTION "USB High Speed Option driver"
78#define MOD_LICENSE "GPL"
79
80#define HSO_MAX_NET_DEVICES 10
81#define HSO__MAX_MTU 2048
82#define DEFAULT_MTU 1500
83#define DEFAULT_MRU 1500
84
85#define CTRL_URB_RX_SIZE 1024
86#define CTRL_URB_TX_SIZE 64
87
88#define BULK_URB_RX_SIZE 4096
89#define BULK_URB_TX_SIZE 8192
90
91#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
92#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
93#define MUX_BULK_RX_BUF_COUNT 4
94#define USB_TYPE_OPTION_VENDOR 0x20
95
96/* These definitions are used with the struct hso_net flags element */
97/* - use *_bit operations on it. (bit indices not values.) */
98#define HSO_NET_RUNNING 0
99
100#define HSO_NET_TX_TIMEOUT (HZ*10)
101
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 D__(lvl_, fmt, arg...) \
113 do { \
114 printk(lvl_ "[%d:%s]: " fmt "\n", \
115 __LINE__, __func__, ## arg); \
116 } while (0)
117
118#define D_(lvl, args...) \
119 do { \
120 if (lvl & debug) \
121 D__(KERN_INFO, args); \
122 } while (0)
123
124#define D1(args...) D_(0x01, ##args)
125#define D2(args...) D_(0x02, ##args)
126#define D3(args...) D_(0x04, ##args)
127#define D4(args...) D_(0x08, ##args)
128#define D5(args...) D_(0x10, ##args)
129
130/*****************************************************************************/
131/* Enumerators */
132/*****************************************************************************/
133enum pkt_parse_state {
134 WAIT_IP,
135 WAIT_DATA,
136 WAIT_SYNC
137};
138
139/*****************************************************************************/
140/* Structs */
141/*****************************************************************************/
142
143struct hso_shared_int {
144 struct usb_endpoint_descriptor *intr_endp;
145 void *shared_intr_buf;
146 struct urb *shared_intr_urb;
147 struct usb_device *usb;
148 int use_count;
149 int ref_count;
150 struct mutex shared_int_lock;
151};
152
153struct hso_net {
154 struct hso_device *parent;
155 struct net_device *net;
156 struct rfkill *rfkill;
157
158 struct usb_endpoint_descriptor *in_endp;
159 struct usb_endpoint_descriptor *out_endp;
160
161 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
162 struct urb *mux_bulk_tx_urb;
163 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
164 void *mux_bulk_tx_buf;
165
166 struct sk_buff *skb_rx_buf;
167 struct sk_buff *skb_tx_buf;
168
169 enum pkt_parse_state rx_parse_state;
170 spinlock_t net_lock;
171
172 unsigned short rx_buf_size;
173 unsigned short rx_buf_missing;
174 struct iphdr rx_ip_hdr;
175
176 unsigned long flags;
177};
178
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_INDEX (0x2)
189#define W_LENGTH (0x2)
190
191#define B_OVERRUN (0x1<<6)
192#define B_PARITY (0x1<<5)
193#define B_FRAMING (0x1<<4)
194#define B_RING_SIGNAL (0x1<<3)
195#define B_BREAK (0x1<<2)
196#define B_TX_CARRIER (0x1<<1)
197#define B_RX_CARRIER (0x1<<0)
198
199struct hso_serial_state_notification {
200 u8 bmRequestType;
201 u8 bNotification;
202 u16 wValue;
203 u16 wIndex;
204 u16 wLength;
205 u16 UART_state_bitmap;
206} __packed;
207
208struct hso_tiocmget {
209 struct mutex mutex;
210 wait_queue_head_t waitq;
211 int intr_completed;
212 struct usb_endpoint_descriptor *endp;
213 struct urb *urb;
214 struct hso_serial_state_notification serial_state_notification;
215 u16 prev_UART_state_bitmap;
216 struct uart_icount icount;
217};
218
219
220struct hso_serial {
221 struct hso_device *parent;
222 int magic;
223 u8 minor;
224
225 struct hso_shared_int *shared_int;
226
227 /* rx/tx urb could be either a bulk urb or a control urb depending
228 on which serial port it is used on. */
229 struct urb *rx_urb[MAX_RX_URBS];
230 u8 num_rx_urbs;
231 u8 *rx_data[MAX_RX_URBS];
232 u16 rx_data_length; /* should contain allocated length */
233
234 struct urb *tx_urb;
235 u8 *tx_data;
236 u8 *tx_buffer;
237 u16 tx_data_length; /* should contain allocated length */
238 u16 tx_data_count;
239 u16 tx_buffer_count;
240 struct usb_ctrlrequest ctrl_req_tx;
241 struct usb_ctrlrequest ctrl_req_rx;
242
243 struct usb_endpoint_descriptor *in_endp;
244 struct usb_endpoint_descriptor *out_endp;
245
246 enum rx_ctrl_state rx_state;
247 u8 rts_state;
248 u8 dtr_state;
249 unsigned tx_urb_used:1;
250
251 struct tty_port port;
252 /* from usb_serial_port */
253 spinlock_t serial_lock;
254
255 int (*write_data) (struct hso_serial *serial);
256 struct hso_tiocmget *tiocmget;
257 /* Hacks required to get flow control
258 * working on the serial receive buffers
259 * so as not to drop characters on the floor.
260 */
261 int curr_rx_urb_idx;
262 u16 curr_rx_urb_offset;
263 u8 rx_urb_filled[MAX_RX_URBS];
264 struct tasklet_struct unthrottle_tasklet;
265 struct work_struct retry_unthrottle_workqueue;
266};
267
268struct hso_device {
269 union {
270 struct hso_serial *dev_serial;
271 struct hso_net *dev_net;
272 } port_data;
273
274 u32 port_spec;
275
276 u8 is_active;
277 u8 usb_gone;
278 struct work_struct async_get_intf;
279 struct work_struct async_put_intf;
280 struct work_struct reset_device;
281
282 struct usb_device *usb;
283 struct usb_interface *interface;
284
285 struct device *dev;
286 struct kref ref;
287 struct mutex mutex;
288};
289
290/* Type of interface */
291#define HSO_INTF_MASK 0xFF00
292#define HSO_INTF_MUX 0x0100
293#define HSO_INTF_BULK 0x0200
294
295/* Type of port */
296#define HSO_PORT_MASK 0xFF
297#define HSO_PORT_NO_PORT 0x0
298#define HSO_PORT_CONTROL 0x1
299#define HSO_PORT_APP 0x2
300#define HSO_PORT_GPS 0x3
301#define HSO_PORT_PCSC 0x4
302#define HSO_PORT_APP2 0x5
303#define HSO_PORT_GPS_CONTROL 0x6
304#define HSO_PORT_MSD 0x7
305#define HSO_PORT_VOICE 0x8
306#define HSO_PORT_DIAG2 0x9
307#define HSO_PORT_DIAG 0x10
308#define HSO_PORT_MODEM 0x11
309#define HSO_PORT_NETWORK 0x12
310
311/* Additional device info */
312#define HSO_INFO_MASK 0xFF000000
313#define HSO_INFO_CRC_BUG 0x01000000
314
315/*****************************************************************************/
316/* Prototypes */
317/*****************************************************************************/
318/* Serial driver functions */
319static int hso_serial_tiocmset(struct tty_struct *tty,
320 unsigned int set, unsigned int clear);
321static void ctrl_callback(struct urb *urb);
322static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
323static void hso_kick_transmit(struct hso_serial *serial);
324/* Helper functions */
325static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
326 struct usb_device *usb, gfp_t gfp);
327static void handle_usb_error(int status, const char *function,
328 struct hso_device *hso_dev);
329static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
330 int type, int dir);
331static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
332static void hso_free_interface(struct usb_interface *intf);
333static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
334static int hso_stop_serial_device(struct hso_device *hso_dev);
335static int hso_start_net_device(struct hso_device *hso_dev);
336static void hso_free_shared_int(struct hso_shared_int *shared_int);
337static int hso_stop_net_device(struct hso_device *hso_dev);
338static void hso_serial_ref_free(struct kref *ref);
339static void hso_std_serial_read_bulk_callback(struct urb *urb);
340static int hso_mux_serial_read(struct hso_serial *serial);
341static void async_get_intf(struct work_struct *data);
342static void async_put_intf(struct work_struct *data);
343static int hso_put_activity(struct hso_device *hso_dev);
344static int hso_get_activity(struct hso_device *hso_dev);
345static void tiocmget_intr_callback(struct urb *urb);
346static void reset_device(struct work_struct *data);
347/*****************************************************************************/
348/* Helping functions */
349/*****************************************************************************/
350
351/* #define DEBUG */
352
353static inline struct hso_net *dev2net(struct hso_device *hso_dev)
354{
355 return hso_dev->port_data.dev_net;
356}
357
358static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
359{
360 return hso_dev->port_data.dev_serial;
361}
362
363/* Debugging functions */
364#ifdef DEBUG
365static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
366 unsigned int len)
367{
368 static char name[255];
369
370 sprintf(name, "hso[%d:%s]", line_count, func_name);
371 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
372}
373
374#define DUMP(buf_, len_) \
375 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
376
377#define DUMP1(buf_, len_) \
378 do { \
379 if (0x01 & debug) \
380 DUMP(buf_, len_); \
381 } while (0)
382#else
383#define DUMP(buf_, len_)
384#define DUMP1(buf_, len_)
385#endif
386
387/* module parameters */
388static int debug;
389static int tty_major;
390static int disable_net;
391
392/* driver info */
393static const char driver_name[] = "hso";
394static const char tty_filename[] = "ttyHS";
395static const char *version = __FILE__ ": " MOD_AUTHOR;
396/* the usb driver itself (registered in hso_init) */
397static struct usb_driver hso_driver;
398/* serial structures */
399static struct tty_driver *tty_drv;
400static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
401static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
402static spinlock_t serial_table_lock;
403
404static const s32 default_port_spec[] = {
405 HSO_INTF_MUX | HSO_PORT_NETWORK,
406 HSO_INTF_BULK | HSO_PORT_DIAG,
407 HSO_INTF_BULK | HSO_PORT_MODEM,
408 0
409};
410
411static const s32 icon321_port_spec[] = {
412 HSO_INTF_MUX | HSO_PORT_NETWORK,
413 HSO_INTF_BULK | HSO_PORT_DIAG2,
414 HSO_INTF_BULK | HSO_PORT_MODEM,
415 HSO_INTF_BULK | HSO_PORT_DIAG,
416 0
417};
418
419#define default_port_device(vendor, product) \
420 USB_DEVICE(vendor, product), \
421 .driver_info = (kernel_ulong_t)default_port_spec
422
423#define icon321_port_device(vendor, product) \
424 USB_DEVICE(vendor, product), \
425 .driver_info = (kernel_ulong_t)icon321_port_spec
426
427/* list of devices we support */
428static const struct usb_device_id hso_ids[] = {
429 {default_port_device(0x0af0, 0x6711)},
430 {default_port_device(0x0af0, 0x6731)},
431 {default_port_device(0x0af0, 0x6751)},
432 {default_port_device(0x0af0, 0x6771)},
433 {default_port_device(0x0af0, 0x6791)},
434 {default_port_device(0x0af0, 0x6811)},
435 {default_port_device(0x0af0, 0x6911)},
436 {default_port_device(0x0af0, 0x6951)},
437 {default_port_device(0x0af0, 0x6971)},
438 {default_port_device(0x0af0, 0x7011)},
439 {default_port_device(0x0af0, 0x7031)},
440 {default_port_device(0x0af0, 0x7051)},
441 {default_port_device(0x0af0, 0x7071)},
442 {default_port_device(0x0af0, 0x7111)},
443 {default_port_device(0x0af0, 0x7211)},
444 {default_port_device(0x0af0, 0x7251)},
445 {default_port_device(0x0af0, 0x7271)},
446 {default_port_device(0x0af0, 0x7311)},
447 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
448 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
449 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
450 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
451 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
452 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
453 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
454 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
455 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
456 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
457 {USB_DEVICE(0x0af0, 0x7701)},
458 {USB_DEVICE(0x0af0, 0x7706)},
459 {USB_DEVICE(0x0af0, 0x7801)},
460 {USB_DEVICE(0x0af0, 0x7901)},
461 {USB_DEVICE(0x0af0, 0x7A01)},
462 {USB_DEVICE(0x0af0, 0x7A05)},
463 {USB_DEVICE(0x0af0, 0x8200)},
464 {USB_DEVICE(0x0af0, 0x8201)},
465 {USB_DEVICE(0x0af0, 0x8300)},
466 {USB_DEVICE(0x0af0, 0x8302)},
467 {USB_DEVICE(0x0af0, 0x8304)},
468 {USB_DEVICE(0x0af0, 0x8400)},
469 {USB_DEVICE(0x0af0, 0x8600)},
470 {USB_DEVICE(0x0af0, 0x8800)},
471 {USB_DEVICE(0x0af0, 0x8900)},
472 {USB_DEVICE(0x0af0, 0x9000)},
473 {USB_DEVICE(0x0af0, 0xd035)},
474 {USB_DEVICE(0x0af0, 0xd055)},
475 {USB_DEVICE(0x0af0, 0xd155)},
476 {USB_DEVICE(0x0af0, 0xd255)},
477 {USB_DEVICE(0x0af0, 0xd057)},
478 {USB_DEVICE(0x0af0, 0xd157)},
479 {USB_DEVICE(0x0af0, 0xd257)},
480 {USB_DEVICE(0x0af0, 0xd357)},
481 {USB_DEVICE(0x0af0, 0xd058)},
482 {USB_DEVICE(0x0af0, 0xc100)},
483 {}
484};
485MODULE_DEVICE_TABLE(usb, hso_ids);
486
487/* Sysfs attribute */
488static ssize_t hso_sysfs_show_porttype(struct device *dev,
489 struct device_attribute *attr,
490 char *buf)
491{
492 struct hso_device *hso_dev = dev_get_drvdata(dev);
493 char *port_name;
494
495 if (!hso_dev)
496 return 0;
497
498 switch (hso_dev->port_spec & HSO_PORT_MASK) {
499 case HSO_PORT_CONTROL:
500 port_name = "Control";
501 break;
502 case HSO_PORT_APP:
503 port_name = "Application";
504 break;
505 case HSO_PORT_APP2:
506 port_name = "Application2";
507 break;
508 case HSO_PORT_GPS:
509 port_name = "GPS";
510 break;
511 case HSO_PORT_GPS_CONTROL:
512 port_name = "GPS Control";
513 break;
514 case HSO_PORT_PCSC:
515 port_name = "PCSC";
516 break;
517 case HSO_PORT_DIAG:
518 port_name = "Diagnostic";
519 break;
520 case HSO_PORT_DIAG2:
521 port_name = "Diagnostic2";
522 break;
523 case HSO_PORT_MODEM:
524 port_name = "Modem";
525 break;
526 case HSO_PORT_NETWORK:
527 port_name = "Network";
528 break;
529 default:
530 port_name = "Unknown";
531 break;
532 }
533
534 return sprintf(buf, "%s\n", port_name);
535}
536static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
537
538static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
539{
540 int idx;
541
542 for (idx = 0; idx < serial->num_rx_urbs; idx++)
543 if (serial->rx_urb[idx] == urb)
544 return idx;
545 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
546 return -1;
547}
548
549/* converts mux value to a port spec value */
550static u32 hso_mux_to_port(int mux)
551{
552 u32 result;
553
554 switch (mux) {
555 case 0x1:
556 result = HSO_PORT_CONTROL;
557 break;
558 case 0x2:
559 result = HSO_PORT_APP;
560 break;
561 case 0x4:
562 result = HSO_PORT_PCSC;
563 break;
564 case 0x8:
565 result = HSO_PORT_GPS;
566 break;
567 case 0x10:
568 result = HSO_PORT_APP2;
569 break;
570 default:
571 result = HSO_PORT_NO_PORT;
572 }
573 return result;
574}
575
576/* converts port spec value to a mux value */
577static u32 hso_port_to_mux(int port)
578{
579 u32 result;
580
581 switch (port & HSO_PORT_MASK) {
582 case HSO_PORT_CONTROL:
583 result = 0x0;
584 break;
585 case HSO_PORT_APP:
586 result = 0x1;
587 break;
588 case HSO_PORT_PCSC:
589 result = 0x2;
590 break;
591 case HSO_PORT_GPS:
592 result = 0x3;
593 break;
594 case HSO_PORT_APP2:
595 result = 0x4;
596 break;
597 default:
598 result = 0x0;
599 }
600 return result;
601}
602
603static struct hso_serial *get_serial_by_shared_int_and_type(
604 struct hso_shared_int *shared_int,
605 int mux)
606{
607 int i, port;
608
609 port = hso_mux_to_port(mux);
610
611 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
612 if (serial_table[i] &&
613 (dev2ser(serial_table[i])->shared_int == shared_int) &&
614 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
615 return dev2ser(serial_table[i]);
616 }
617 }
618
619 return NULL;
620}
621
622static struct hso_serial *get_serial_by_index(unsigned index)
623{
624 struct hso_serial *serial = NULL;
625 unsigned long flags;
626
627 spin_lock_irqsave(&serial_table_lock, flags);
628 if (serial_table[index])
629 serial = dev2ser(serial_table[index]);
630 spin_unlock_irqrestore(&serial_table_lock, flags);
631
632 return serial;
633}
634
635static int get_free_serial_index(void)
636{
637 int index;
638 unsigned long flags;
639
640 spin_lock_irqsave(&serial_table_lock, flags);
641 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
642 if (serial_table[index] == NULL) {
643 spin_unlock_irqrestore(&serial_table_lock, flags);
644 return index;
645 }
646 }
647 spin_unlock_irqrestore(&serial_table_lock, flags);
648
649 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
650 return -1;
651}
652
653static void set_serial_by_index(unsigned index, struct hso_serial *serial)
654{
655 unsigned long flags;
656
657 spin_lock_irqsave(&serial_table_lock, flags);
658 if (serial)
659 serial_table[index] = serial->parent;
660 else
661 serial_table[index] = NULL;
662 spin_unlock_irqrestore(&serial_table_lock, flags);
663}
664
665static void handle_usb_error(int status, const char *function,
666 struct hso_device *hso_dev)
667{
668 char *explanation;
669
670 switch (status) {
671 case -ENODEV:
672 explanation = "no device";
673 break;
674 case -ENOENT:
675 explanation = "endpoint not enabled";
676 break;
677 case -EPIPE:
678 explanation = "endpoint stalled";
679 break;
680 case -ENOSPC:
681 explanation = "not enough bandwidth";
682 break;
683 case -ESHUTDOWN:
684 explanation = "device disabled";
685 break;
686 case -EHOSTUNREACH:
687 explanation = "device suspended";
688 break;
689 case -EINVAL:
690 case -EAGAIN:
691 case -EFBIG:
692 case -EMSGSIZE:
693 explanation = "internal error";
694 break;
695 case -EILSEQ:
696 case -EPROTO:
697 case -ETIME:
698 case -ETIMEDOUT:
699 explanation = "protocol error";
700 if (hso_dev)
701 schedule_work(&hso_dev->reset_device);
702 break;
703 default:
704 explanation = "unknown status";
705 break;
706 }
707
708 /* log a meaningful explanation of an USB status */
709 D1("%s: received USB status - %s (%d)", function, explanation, status);
710}
711
712/* Network interface functions */
713
714/* called when net interface is brought up by ifconfig */
715static int hso_net_open(struct net_device *net)
716{
717 struct hso_net *odev = netdev_priv(net);
718 unsigned long flags = 0;
719
720 if (!odev) {
721 dev_err(&net->dev, "No net device !\n");
722 return -ENODEV;
723 }
724
725 odev->skb_tx_buf = NULL;
726
727 /* setup environment */
728 spin_lock_irqsave(&odev->net_lock, flags);
729 odev->rx_parse_state = WAIT_IP;
730 odev->rx_buf_size = 0;
731 odev->rx_buf_missing = sizeof(struct iphdr);
732 spin_unlock_irqrestore(&odev->net_lock, flags);
733
734 /* We are up and running. */
735 set_bit(HSO_NET_RUNNING, &odev->flags);
736 hso_start_net_device(odev->parent);
737
738 /* Tell the kernel we are ready to start receiving from it */
739 netif_start_queue(net);
740
741 return 0;
742}
743
744/* called when interface is brought down by ifconfig */
745static int hso_net_close(struct net_device *net)
746{
747 struct hso_net *odev = netdev_priv(net);
748
749 /* we don't need the queue anymore */
750 netif_stop_queue(net);
751 /* no longer running */
752 clear_bit(HSO_NET_RUNNING, &odev->flags);
753
754 hso_stop_net_device(odev->parent);
755
756 /* done */
757 return 0;
758}
759
760/* USB tells is xmit done, we should start the netqueue again */
761static void write_bulk_callback(struct urb *urb)
762{
763 struct hso_net *odev = urb->context;
764 int status = urb->status;
765
766 /* Sanity check */
767 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
768 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
769 return;
770 }
771
772 /* Do we still have a valid kernel network device? */
773 if (!netif_device_present(odev->net)) {
774 dev_err(&urb->dev->dev, "%s: net device not present\n",
775 __func__);
776 return;
777 }
778
779 /* log status, but don't act on it, we don't need to resubmit anything
780 * anyhow */
781 if (status)
782 handle_usb_error(status, __func__, odev->parent);
783
784 hso_put_activity(odev->parent);
785
786 /* Tell the network interface we are ready for another frame */
787 netif_wake_queue(odev->net);
788}
789
790/* called by kernel when we need to transmit a packet */
791static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
792 struct net_device *net)
793{
794 struct hso_net *odev = netdev_priv(net);
795 int result;
796
797 /* Tell the kernel, "No more frames 'til we are done with this one." */
798 netif_stop_queue(net);
799 if (hso_get_activity(odev->parent) == -EAGAIN) {
800 odev->skb_tx_buf = skb;
801 return NETDEV_TX_OK;
802 }
803
804 /* log if asked */
805 DUMP1(skb->data, skb->len);
806 /* Copy it from kernel memory to OUR memory */
807 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
808 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
809
810 /* Fill in the URB for shipping it out. */
811 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
812 odev->parent->usb,
813 usb_sndbulkpipe(odev->parent->usb,
814 odev->out_endp->
815 bEndpointAddress & 0x7F),
816 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
817 odev);
818
819 /* Deal with the Zero Length packet problem, I hope */
820 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
821
822 /* Send the URB on its merry way. */
823 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
824 if (result) {
825 dev_warn(&odev->parent->interface->dev,
826 "failed mux_bulk_tx_urb %d\n", result);
827 net->stats.tx_errors++;
828 netif_start_queue(net);
829 } else {
830 net->stats.tx_packets++;
831 net->stats.tx_bytes += skb->len;
832 }
833 dev_kfree_skb(skb);
834 /* we're done */
835 return NETDEV_TX_OK;
836}
837
838static const struct ethtool_ops ops = {
839 .get_link = ethtool_op_get_link
840};
841
842/* called when a packet did not ack after watchdogtimeout */
843static void hso_net_tx_timeout(struct net_device *net)
844{
845 struct hso_net *odev = netdev_priv(net);
846
847 if (!odev)
848 return;
849
850 /* Tell syslog we are hosed. */
851 dev_warn(&net->dev, "Tx timed out.\n");
852
853 /* Tear the waiting frame off the list */
854 if (odev->mux_bulk_tx_urb &&
855 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
856 usb_unlink_urb(odev->mux_bulk_tx_urb);
857
858 /* Update statistics */
859 net->stats.tx_errors++;
860}
861
862/* make a real packet from the received USB buffer */
863static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
864 unsigned int count, unsigned char is_eop)
865{
866 unsigned short temp_bytes;
867 unsigned short buffer_offset = 0;
868 unsigned short frame_len;
869 unsigned char *tmp_rx_buf;
870
871 /* log if needed */
872 D1("Rx %d bytes", count);
873 DUMP(ip_pkt, min(128, (int)count));
874
875 while (count) {
876 switch (odev->rx_parse_state) {
877 case WAIT_IP:
878 /* waiting for IP header. */
879 /* wanted bytes - size of ip header */
880 temp_bytes =
881 (count <
882 odev->rx_buf_missing) ? count : odev->
883 rx_buf_missing;
884
885 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
886 odev->rx_buf_size, ip_pkt + buffer_offset,
887 temp_bytes);
888
889 odev->rx_buf_size += temp_bytes;
890 buffer_offset += temp_bytes;
891 odev->rx_buf_missing -= temp_bytes;
892 count -= temp_bytes;
893
894 if (!odev->rx_buf_missing) {
895 /* header is complete allocate an sk_buffer and
896 * continue to WAIT_DATA */
897 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
898
899 if ((frame_len > DEFAULT_MRU) ||
900 (frame_len < sizeof(struct iphdr))) {
901 dev_err(&odev->net->dev,
902 "Invalid frame (%d) length\n",
903 frame_len);
904 odev->rx_parse_state = WAIT_SYNC;
905 continue;
906 }
907 /* Allocate an sk_buff */
908 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
909 frame_len);
910 if (!odev->skb_rx_buf) {
911 /* We got no receive buffer. */
912 D1("could not allocate memory");
913 odev->rx_parse_state = WAIT_SYNC;
914 return;
915 }
916
917 /* Copy what we got so far. make room for iphdr
918 * after tail. */
919 tmp_rx_buf =
920 skb_put(odev->skb_rx_buf,
921 sizeof(struct iphdr));
922 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
923 sizeof(struct iphdr));
924
925 /* ETH_HLEN */
926 odev->rx_buf_size = sizeof(struct iphdr);
927
928 /* Filip actually use .tot_len */
929 odev->rx_buf_missing =
930 frame_len - sizeof(struct iphdr);
931 odev->rx_parse_state = WAIT_DATA;
932 }
933 break;
934
935 case WAIT_DATA:
936 temp_bytes = (count < odev->rx_buf_missing)
937 ? count : odev->rx_buf_missing;
938
939 /* Copy the rest of the bytes that are left in the
940 * buffer into the waiting sk_buf. */
941 /* Make room for temp_bytes after tail. */
942 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
943 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
944
945 odev->rx_buf_missing -= temp_bytes;
946 count -= temp_bytes;
947 buffer_offset += temp_bytes;
948 odev->rx_buf_size += temp_bytes;
949 if (!odev->rx_buf_missing) {
950 /* Packet is complete. Inject into stack. */
951 /* We have IP packet here */
952 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
953 skb_reset_mac_header(odev->skb_rx_buf);
954
955 /* Ship it off to the kernel */
956 netif_rx(odev->skb_rx_buf);
957 /* No longer our buffer. */
958 odev->skb_rx_buf = NULL;
959
960 /* update out statistics */
961 odev->net->stats.rx_packets++;
962
963 odev->net->stats.rx_bytes += odev->rx_buf_size;
964
965 odev->rx_buf_size = 0;
966 odev->rx_buf_missing = sizeof(struct iphdr);
967 odev->rx_parse_state = WAIT_IP;
968 }
969 break;
970
971 case WAIT_SYNC:
972 D1(" W_S");
973 count = 0;
974 break;
975 default:
976 D1(" ");
977 count--;
978 break;
979 }
980 }
981
982 /* Recovery mechanism for WAIT_SYNC state. */
983 if (is_eop) {
984 if (odev->rx_parse_state == WAIT_SYNC) {
985 odev->rx_parse_state = WAIT_IP;
986 odev->rx_buf_size = 0;
987 odev->rx_buf_missing = sizeof(struct iphdr);
988 }
989 }
990}
991
992static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
993{
994 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
995 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
996
997 if (((rest == 5) || (rest == 6)) &&
998 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
999 crc_check, 4)) {
1000 urb->actual_length -= 4;
1001 }
1002}
1003
1004/* Moving data from usb to kernel (in interrupt state) */
1005static void read_bulk_callback(struct urb *urb)
1006{
1007 struct hso_net *odev = urb->context;
1008 struct net_device *net;
1009 int result;
1010 int status = urb->status;
1011
1012 /* is al ok? (Filip: Who's Al ?) */
1013 if (status) {
1014 handle_usb_error(status, __func__, odev->parent);
1015 return;
1016 }
1017
1018 /* Sanity check */
1019 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1020 D1("BULK IN callback but driver is not active!");
1021 return;
1022 }
1023 usb_mark_last_busy(urb->dev);
1024
1025 net = odev->net;
1026
1027 if (!netif_device_present(net)) {
1028 /* Somebody killed our network interface... */
1029 return;
1030 }
1031
1032 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1033 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1034
1035 /* do we even have a packet? */
1036 if (urb->actual_length) {
1037 /* Handle the IP stream, add header and push it onto network
1038 * stack if the packet is complete. */
1039 spin_lock(&odev->net_lock);
1040 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1041 (urb->transfer_buffer_length >
1042 urb->actual_length) ? 1 : 0);
1043 spin_unlock(&odev->net_lock);
1044 }
1045
1046 /* We are done with this URB, resubmit it. Prep the USB to wait for
1047 * another frame. Reuse same as received. */
1048 usb_fill_bulk_urb(urb,
1049 odev->parent->usb,
1050 usb_rcvbulkpipe(odev->parent->usb,
1051 odev->in_endp->
1052 bEndpointAddress & 0x7F),
1053 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1054 read_bulk_callback, odev);
1055
1056 /* Give this to the USB subsystem so it can tell us when more data
1057 * arrives. */
1058 result = usb_submit_urb(urb, GFP_ATOMIC);
1059 if (result)
1060 dev_warn(&odev->parent->interface->dev,
1061 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1062 result);
1063}
1064
1065/* Serial driver functions */
1066
1067static void hso_init_termios(struct ktermios *termios)
1068{
1069 /*
1070 * The default requirements for this device are:
1071 */
1072 termios->c_iflag &=
1073 ~(IGNBRK /* disable ignore break */
1074 | BRKINT /* disable break causes interrupt */
1075 | PARMRK /* disable mark parity errors */
1076 | ISTRIP /* disable clear high bit of input characters */
1077 | INLCR /* disable translate NL to CR */
1078 | IGNCR /* disable ignore CR */
1079 | ICRNL /* disable translate CR to NL */
1080 | IXON); /* disable enable XON/XOFF flow control */
1081
1082 /* disable postprocess output characters */
1083 termios->c_oflag &= ~OPOST;
1084
1085 termios->c_lflag &=
1086 ~(ECHO /* disable echo input characters */
1087 | ECHONL /* disable echo new line */
1088 | ICANON /* disable erase, kill, werase, and rprnt
1089 special characters */
1090 | ISIG /* disable interrupt, quit, and suspend special
1091 characters */
1092 | IEXTEN); /* disable non-POSIX special characters */
1093
1094 termios->c_cflag &=
1095 ~(CSIZE /* no size */
1096 | PARENB /* disable parity bit */
1097 | CBAUD /* clear current baud rate */
1098 | CBAUDEX); /* clear current buad rate */
1099
1100 termios->c_cflag |= CS8; /* character size 8 bits */
1101
1102 /* baud rate 115200 */
1103 tty_termios_encode_baud_rate(termios, 115200, 115200);
1104}
1105
1106static void _hso_serial_set_termios(struct tty_struct *tty,
1107 struct ktermios *old)
1108{
1109 struct hso_serial *serial = tty->driver_data;
1110 struct ktermios *termios;
1111
1112 if (!serial) {
1113 printk(KERN_ERR "%s: no tty structures", __func__);
1114 return;
1115 }
1116
1117 D4("port %d", serial->minor);
1118
1119 /*
1120 * Fix up unsupported bits
1121 */
1122 termios = tty->termios;
1123 termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1124
1125 termios->c_cflag &=
1126 ~(CSIZE /* no size */
1127 | PARENB /* disable parity bit */
1128 | CBAUD /* clear current baud rate */
1129 | CBAUDEX); /* clear current buad rate */
1130
1131 termios->c_cflag |= CS8; /* character size 8 bits */
1132
1133 /* baud rate 115200 */
1134 tty_encode_baud_rate(tty, 115200, 115200);
1135}
1136
1137static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1138{
1139 int result;
1140 /* We are done with this URB, resubmit it. Prep the USB to wait for
1141 * another frame */
1142 usb_fill_bulk_urb(urb, serial->parent->usb,
1143 usb_rcvbulkpipe(serial->parent->usb,
1144 serial->in_endp->
1145 bEndpointAddress & 0x7F),
1146 urb->transfer_buffer, serial->rx_data_length,
1147 hso_std_serial_read_bulk_callback, serial);
1148 /* Give this to the USB subsystem so it can tell us when more data
1149 * arrives. */
1150 result = usb_submit_urb(urb, GFP_ATOMIC);
1151 if (result) {
1152 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1153 __func__, result);
1154 }
1155}
1156
1157
1158
1159
1160static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1161{
1162 int count;
1163 struct urb *curr_urb;
1164
1165 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1166 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1167 count = put_rxbuf_data(curr_urb, serial);
1168 if (count == -1)
1169 return;
1170 if (count == 0) {
1171 serial->curr_rx_urb_idx++;
1172 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1173 serial->curr_rx_urb_idx = 0;
1174 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1175 }
1176 }
1177}
1178
1179static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1180{
1181 int count = 0;
1182 struct urb *urb;
1183
1184 urb = serial->rx_urb[0];
1185 if (serial->port.count > 0) {
1186 count = put_rxbuf_data(urb, serial);
1187 if (count == -1)
1188 return;
1189 }
1190 /* Re issue a read as long as we receive data. */
1191
1192 if (count == 0 && ((urb->actual_length != 0) ||
1193 (serial->rx_state == RX_PENDING))) {
1194 serial->rx_state = RX_SENT;
1195 hso_mux_serial_read(serial);
1196 } else
1197 serial->rx_state = RX_IDLE;
1198}
1199
1200
1201/* read callback for Diag and CS port */
1202static void hso_std_serial_read_bulk_callback(struct urb *urb)
1203{
1204 struct hso_serial *serial = urb->context;
1205 int status = urb->status;
1206
1207 /* sanity check */
1208 if (!serial) {
1209 D1("serial == NULL");
1210 return;
1211 } else if (status) {
1212 handle_usb_error(status, __func__, serial->parent);
1213 return;
1214 }
1215
1216 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1217 D1("Actual length = %d\n", urb->actual_length);
1218 DUMP1(urb->transfer_buffer, urb->actual_length);
1219
1220 /* Anyone listening? */
1221 if (serial->port.count == 0)
1222 return;
1223
1224 if (status == 0) {
1225 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1226 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1227 /* Valid data, handle RX data */
1228 spin_lock(&serial->serial_lock);
1229 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1230 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1231 spin_unlock(&serial->serial_lock);
1232 } else if (status == -ENOENT || status == -ECONNRESET) {
1233 /* Unlinked - check for throttled port. */
1234 D2("Port %d, successfully unlinked urb", serial->minor);
1235 spin_lock(&serial->serial_lock);
1236 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1237 hso_resubmit_rx_bulk_urb(serial, urb);
1238 spin_unlock(&serial->serial_lock);
1239 } else {
1240 D2("Port %d, status = %d for read urb", serial->minor, status);
1241 return;
1242 }
1243}
1244
1245/*
1246 * This needs to be a tasklet otherwise we will
1247 * end up recursively calling this function.
1248 */
1249static void hso_unthrottle_tasklet(struct hso_serial *serial)
1250{
1251 unsigned long flags;
1252
1253 spin_lock_irqsave(&serial->serial_lock, flags);
1254 if ((serial->parent->port_spec & HSO_INTF_MUX))
1255 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1256 else
1257 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1258 spin_unlock_irqrestore(&serial->serial_lock, flags);
1259}
1260
1261static void hso_unthrottle(struct tty_struct *tty)
1262{
1263 struct hso_serial *serial = tty->driver_data;
1264
1265 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1266}
1267
1268static void hso_unthrottle_workfunc(struct work_struct *work)
1269{
1270 struct hso_serial *serial =
1271 container_of(work, struct hso_serial,
1272 retry_unthrottle_workqueue);
1273 hso_unthrottle_tasklet(serial);
1274}
1275
1276/* open the requested serial port */
1277static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1278{
1279 struct hso_serial *serial = get_serial_by_index(tty->index);
1280 int result;
1281
1282 /* sanity check */
1283 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1284 WARN_ON(1);
1285 tty->driver_data = NULL;
1286 D1("Failed to open port");
1287 return -ENODEV;
1288 }
1289
1290 mutex_lock(&serial->parent->mutex);
1291 result = usb_autopm_get_interface(serial->parent->interface);
1292 if (result < 0)
1293 goto err_out;
1294
1295 D1("Opening %d", serial->minor);
1296 kref_get(&serial->parent->ref);
1297
1298 /* setup */
1299 tty->driver_data = serial;
1300 tty_port_tty_set(&serial->port, tty);
1301
1302 /* check for port already opened, if not set the termios */
1303 serial->port.count++;
1304 if (serial->port.count == 1) {
1305 serial->rx_state = RX_IDLE;
1306 /* Force default termio settings */
1307 _hso_serial_set_termios(tty, NULL);
1308 tasklet_init(&serial->unthrottle_tasklet,
1309 (void (*)(unsigned long))hso_unthrottle_tasklet,
1310 (unsigned long)serial);
1311 INIT_WORK(&serial->retry_unthrottle_workqueue,
1312 hso_unthrottle_workfunc);
1313 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1314 if (result) {
1315 hso_stop_serial_device(serial->parent);
1316 serial->port.count--;
1317 kref_put(&serial->parent->ref, hso_serial_ref_free);
1318 }
1319 } else {
1320 D1("Port was already open");
1321 }
1322
1323 usb_autopm_put_interface(serial->parent->interface);
1324
1325 /* done */
1326 if (result)
1327 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1328err_out:
1329 mutex_unlock(&serial->parent->mutex);
1330 return result;
1331}
1332
1333/* close the requested serial port */
1334static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1335{
1336 struct hso_serial *serial = tty->driver_data;
1337 u8 usb_gone;
1338
1339 D1("Closing serial port");
1340
1341 /* Open failed, no close cleanup required */
1342 if (serial == NULL)
1343 return;
1344
1345 mutex_lock(&serial->parent->mutex);
1346 usb_gone = serial->parent->usb_gone;
1347
1348 if (!usb_gone)
1349 usb_autopm_get_interface(serial->parent->interface);
1350
1351 /* reset the rts and dtr */
1352 /* do the actual close */
1353 serial->port.count--;
1354
1355 if (serial->port.count <= 0) {
1356 serial->port.count = 0;
1357 tty_port_tty_set(&serial->port, NULL);
1358 if (!usb_gone)
1359 hso_stop_serial_device(serial->parent);
1360 tasklet_kill(&serial->unthrottle_tasklet);
1361 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1362 }
1363
1364 if (!usb_gone)
1365 usb_autopm_put_interface(serial->parent->interface);
1366
1367 mutex_unlock(&serial->parent->mutex);
1368
1369 kref_put(&serial->parent->ref, hso_serial_ref_free);
1370}
1371
1372/* close the requested serial port */
1373static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1374 int count)
1375{
1376 struct hso_serial *serial = tty->driver_data;
1377 int space, tx_bytes;
1378 unsigned long flags;
1379
1380 /* sanity check */
1381 if (serial == NULL) {
1382 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1383 return -ENODEV;
1384 }
1385
1386 spin_lock_irqsave(&serial->serial_lock, flags);
1387
1388 space = serial->tx_data_length - serial->tx_buffer_count;
1389 tx_bytes = (count < space) ? count : space;
1390
1391 if (!tx_bytes)
1392 goto out;
1393
1394 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1395 serial->tx_buffer_count += tx_bytes;
1396
1397out:
1398 spin_unlock_irqrestore(&serial->serial_lock, flags);
1399
1400 hso_kick_transmit(serial);
1401 /* done */
1402 return tx_bytes;
1403}
1404
1405/* how much room is there for writing */
1406static int hso_serial_write_room(struct tty_struct *tty)
1407{
1408 struct hso_serial *serial = tty->driver_data;
1409 int room;
1410 unsigned long flags;
1411
1412 spin_lock_irqsave(&serial->serial_lock, flags);
1413 room = serial->tx_data_length - serial->tx_buffer_count;
1414 spin_unlock_irqrestore(&serial->serial_lock, flags);
1415
1416 /* return free room */
1417 return room;
1418}
1419
1420/* setup the term */
1421static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1422{
1423 struct hso_serial *serial = tty->driver_data;
1424 unsigned long flags;
1425
1426 if (old)
1427 D5("Termios called with: cflags new[%d] - old[%d]",
1428 tty->termios->c_cflag, old->c_cflag);
1429
1430 /* the actual setup */
1431 spin_lock_irqsave(&serial->serial_lock, flags);
1432 if (serial->port.count)
1433 _hso_serial_set_termios(tty, old);
1434 else
1435 tty->termios = old;
1436 spin_unlock_irqrestore(&serial->serial_lock, flags);
1437
1438 /* done */
1439}
1440
1441/* how many characters in the buffer */
1442static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1443{
1444 struct hso_serial *serial = tty->driver_data;
1445 int chars;
1446 unsigned long flags;
1447
1448 /* sanity check */
1449 if (serial == NULL)
1450 return 0;
1451
1452 spin_lock_irqsave(&serial->serial_lock, flags);
1453 chars = serial->tx_buffer_count;
1454 spin_unlock_irqrestore(&serial->serial_lock, flags);
1455
1456 return chars;
1457}
1458static int tiocmget_submit_urb(struct hso_serial *serial,
1459 struct hso_tiocmget *tiocmget,
1460 struct usb_device *usb)
1461{
1462 int result;
1463
1464 if (serial->parent->usb_gone)
1465 return -ENODEV;
1466 usb_fill_int_urb(tiocmget->urb, usb,
1467 usb_rcvintpipe(usb,
1468 tiocmget->endp->
1469 bEndpointAddress & 0x7F),
1470 &tiocmget->serial_state_notification,
1471 sizeof(struct hso_serial_state_notification),
1472 tiocmget_intr_callback, serial,
1473 tiocmget->endp->bInterval);
1474 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1475 if (result) {
1476 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1477 result);
1478 }
1479 return result;
1480
1481}
1482
1483static void tiocmget_intr_callback(struct urb *urb)
1484{
1485 struct hso_serial *serial = urb->context;
1486 struct hso_tiocmget *tiocmget;
1487 int status = urb->status;
1488 u16 UART_state_bitmap, prev_UART_state_bitmap;
1489 struct uart_icount *icount;
1490 struct hso_serial_state_notification *serial_state_notification;
1491 struct usb_device *usb;
1492
1493 /* Sanity checks */
1494 if (!serial)
1495 return;
1496 if (status) {
1497 handle_usb_error(status, __func__, serial->parent);
1498 return;
1499 }
1500 tiocmget = serial->tiocmget;
1501 if (!tiocmget)
1502 return;
1503 usb = serial->parent->usb;
1504 serial_state_notification = &tiocmget->serial_state_notification;
1505 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1506 serial_state_notification->bNotification != B_NOTIFICATION ||
1507 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1508 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1509 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1510 dev_warn(&usb->dev,
1511 "hso received invalid serial state notification\n");
1512 DUMP(serial_state_notification,
1513 sizeof(struct hso_serial_state_notification));
1514 } else {
1515
1516 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1517 UART_state_bitmap);
1518 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1519 icount = &tiocmget->icount;
1520 spin_lock(&serial->serial_lock);
1521 if ((UART_state_bitmap & B_OVERRUN) !=
1522 (prev_UART_state_bitmap & B_OVERRUN))
1523 icount->parity++;
1524 if ((UART_state_bitmap & B_PARITY) !=
1525 (prev_UART_state_bitmap & B_PARITY))
1526 icount->parity++;
1527 if ((UART_state_bitmap & B_FRAMING) !=
1528 (prev_UART_state_bitmap & B_FRAMING))
1529 icount->frame++;
1530 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1531 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1532 icount->rng++;
1533 if ((UART_state_bitmap & B_BREAK) !=
1534 (prev_UART_state_bitmap & B_BREAK))
1535 icount->brk++;
1536 if ((UART_state_bitmap & B_TX_CARRIER) !=
1537 (prev_UART_state_bitmap & B_TX_CARRIER))
1538 icount->dsr++;
1539 if ((UART_state_bitmap & B_RX_CARRIER) !=
1540 (prev_UART_state_bitmap & B_RX_CARRIER))
1541 icount->dcd++;
1542 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1543 spin_unlock(&serial->serial_lock);
1544 tiocmget->intr_completed = 1;
1545 wake_up_interruptible(&tiocmget->waitq);
1546 }
1547 memset(serial_state_notification, 0,
1548 sizeof(struct hso_serial_state_notification));
1549 tiocmget_submit_urb(serial,
1550 tiocmget,
1551 serial->parent->usb);
1552}
1553
1554/*
1555 * next few functions largely stolen from drivers/serial/serial_core.c
1556 */
1557/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1558 * - mask passed in arg for lines of interest
1559 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1560 * Caller should use TIOCGICOUNT to see which one it was
1561 */
1562static int
1563hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1564{
1565 DECLARE_WAITQUEUE(wait, current);
1566 struct uart_icount cprev, cnow;
1567 struct hso_tiocmget *tiocmget;
1568 int ret;
1569
1570 tiocmget = serial->tiocmget;
1571 if (!tiocmget)
1572 return -ENOENT;
1573 /*
1574 * note the counters on entry
1575 */
1576 spin_lock_irq(&serial->serial_lock);
1577 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1578 spin_unlock_irq(&serial->serial_lock);
1579 add_wait_queue(&tiocmget->waitq, &wait);
1580 for (;;) {
1581 spin_lock_irq(&serial->serial_lock);
1582 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1583 spin_unlock_irq(&serial->serial_lock);
1584 set_current_state(TASK_INTERRUPTIBLE);
1585 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1586 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1587 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1588 ret = 0;
1589 break;
1590 }
1591 schedule();
1592 /* see if a signal did it */
1593 if (signal_pending(current)) {
1594 ret = -ERESTARTSYS;
1595 break;
1596 }
1597 cprev = cnow;
1598 }
1599 current->state = TASK_RUNNING;
1600 remove_wait_queue(&tiocmget->waitq, &wait);
1601
1602 return ret;
1603}
1604
1605/*
1606 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1607 * Return: write counters to the user passed counter struct
1608 * NB: both 1->0 and 0->1 transitions are counted except for
1609 * RI where only 0->1 is counted.
1610 */
1611static int hso_get_count(struct tty_struct *tty,
1612 struct serial_icounter_struct *icount)
1613{
1614 struct uart_icount cnow;
1615 struct hso_serial *serial = tty->driver_data;
1616 struct hso_tiocmget *tiocmget = serial->tiocmget;
1617
1618 memset(icount, 0, sizeof(struct serial_icounter_struct));
1619
1620 if (!tiocmget)
1621 return -ENOENT;
1622 spin_lock_irq(&serial->serial_lock);
1623 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1624 spin_unlock_irq(&serial->serial_lock);
1625
1626 icount->cts = cnow.cts;
1627 icount->dsr = cnow.dsr;
1628 icount->rng = cnow.rng;
1629 icount->dcd = cnow.dcd;
1630 icount->rx = cnow.rx;
1631 icount->tx = cnow.tx;
1632 icount->frame = cnow.frame;
1633 icount->overrun = cnow.overrun;
1634 icount->parity = cnow.parity;
1635 icount->brk = cnow.brk;
1636 icount->buf_overrun = cnow.buf_overrun;
1637
1638 return 0;
1639}
1640
1641
1642static int hso_serial_tiocmget(struct tty_struct *tty)
1643{
1644 int retval;
1645 struct hso_serial *serial = tty->driver_data;
1646 struct hso_tiocmget *tiocmget;
1647 u16 UART_state_bitmap;
1648
1649 /* sanity check */
1650 if (!serial) {
1651 D1("no tty structures");
1652 return -EINVAL;
1653 }
1654 spin_lock_irq(&serial->serial_lock);
1655 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1656 ((serial->dtr_state) ? TIOCM_DTR : 0);
1657 tiocmget = serial->tiocmget;
1658 if (tiocmget) {
1659
1660 UART_state_bitmap = le16_to_cpu(
1661 tiocmget->prev_UART_state_bitmap);
1662 if (UART_state_bitmap & B_RING_SIGNAL)
1663 retval |= TIOCM_RNG;
1664 if (UART_state_bitmap & B_RX_CARRIER)
1665 retval |= TIOCM_CD;
1666 if (UART_state_bitmap & B_TX_CARRIER)
1667 retval |= TIOCM_DSR;
1668 }
1669 spin_unlock_irq(&serial->serial_lock);
1670 return retval;
1671}
1672
1673static int hso_serial_tiocmset(struct tty_struct *tty,
1674 unsigned int set, unsigned int clear)
1675{
1676 int val = 0;
1677 unsigned long flags;
1678 int if_num;
1679 struct hso_serial *serial = tty->driver_data;
1680
1681 /* sanity check */
1682 if (!serial) {
1683 D1("no tty structures");
1684 return -EINVAL;
1685 }
1686
1687 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1688 return -EINVAL;
1689
1690 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1691
1692 spin_lock_irqsave(&serial->serial_lock, flags);
1693 if (set & TIOCM_RTS)
1694 serial->rts_state = 1;
1695 if (set & TIOCM_DTR)
1696 serial->dtr_state = 1;
1697
1698 if (clear & TIOCM_RTS)
1699 serial->rts_state = 0;
1700 if (clear & TIOCM_DTR)
1701 serial->dtr_state = 0;
1702
1703 if (serial->dtr_state)
1704 val |= 0x01;
1705 if (serial->rts_state)
1706 val |= 0x02;
1707
1708 spin_unlock_irqrestore(&serial->serial_lock, flags);
1709
1710 return usb_control_msg(serial->parent->usb,
1711 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1712 0x21, val, if_num, NULL, 0,
1713 USB_CTRL_SET_TIMEOUT);
1714}
1715
1716static int hso_serial_ioctl(struct tty_struct *tty,
1717 unsigned int cmd, unsigned long arg)
1718{
1719 struct hso_serial *serial = tty->driver_data;
1720 int ret = 0;
1721 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1722
1723 if (!serial)
1724 return -ENODEV;
1725 switch (cmd) {
1726 case TIOCMIWAIT:
1727 ret = hso_wait_modem_status(serial, arg);
1728 break;
1729 default:
1730 ret = -ENOIOCTLCMD;
1731 break;
1732 }
1733 return ret;
1734}
1735
1736
1737/* starts a transmit */
1738static void hso_kick_transmit(struct hso_serial *serial)
1739{
1740 u8 *temp;
1741 unsigned long flags;
1742 int res;
1743
1744 spin_lock_irqsave(&serial->serial_lock, flags);
1745 if (!serial->tx_buffer_count)
1746 goto out;
1747
1748 if (serial->tx_urb_used)
1749 goto out;
1750
1751 /* Wakeup USB interface if necessary */
1752 if (hso_get_activity(serial->parent) == -EAGAIN)
1753 goto out;
1754
1755 /* Switch pointers around to avoid memcpy */
1756 temp = serial->tx_buffer;
1757 serial->tx_buffer = serial->tx_data;
1758 serial->tx_data = temp;
1759 serial->tx_data_count = serial->tx_buffer_count;
1760 serial->tx_buffer_count = 0;
1761
1762 /* If temp is set, it means we switched buffers */
1763 if (temp && serial->write_data) {
1764 res = serial->write_data(serial);
1765 if (res >= 0)
1766 serial->tx_urb_used = 1;
1767 }
1768out:
1769 spin_unlock_irqrestore(&serial->serial_lock, flags);
1770}
1771
1772/* make a request (for reading and writing data to muxed serial port) */
1773static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1774 struct urb *ctrl_urb,
1775 struct usb_ctrlrequest *ctrl_req,
1776 u8 *ctrl_urb_data, u32 size)
1777{
1778 int result;
1779 int pipe;
1780
1781 /* Sanity check */
1782 if (!serial || !ctrl_urb || !ctrl_req) {
1783 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1784 return -EINVAL;
1785 }
1786
1787 /* initialize */
1788 ctrl_req->wValue = 0;
1789 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1790 ctrl_req->wLength = cpu_to_le16(size);
1791
1792 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1793 /* Reading command */
1794 ctrl_req->bRequestType = USB_DIR_IN |
1795 USB_TYPE_OPTION_VENDOR |
1796 USB_RECIP_INTERFACE;
1797 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1798 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1799 } else {
1800 /* Writing command */
1801 ctrl_req->bRequestType = USB_DIR_OUT |
1802 USB_TYPE_OPTION_VENDOR |
1803 USB_RECIP_INTERFACE;
1804 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1805 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1806 }
1807 /* syslog */
1808 D2("%s command (%02x) len: %d, port: %d",
1809 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1810 ctrl_req->bRequestType, ctrl_req->wLength, port);
1811
1812 /* Load ctrl urb */
1813 ctrl_urb->transfer_flags = 0;
1814 usb_fill_control_urb(ctrl_urb,
1815 serial->parent->usb,
1816 pipe,
1817 (u8 *) ctrl_req,
1818 ctrl_urb_data, size, ctrl_callback, serial);
1819 /* Send it on merry way */
1820 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1821 if (result) {
1822 dev_err(&ctrl_urb->dev->dev,
1823 "%s failed submit ctrl_urb %d type %d\n", __func__,
1824 result, type);
1825 return result;
1826 }
1827
1828 /* done */
1829 return size;
1830}
1831
1832/* called by intr_callback when read occurs */
1833static int hso_mux_serial_read(struct hso_serial *serial)
1834{
1835 if (!serial)
1836 return -EINVAL;
1837
1838 /* clean data */
1839 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1840 /* make the request */
1841
1842 if (serial->num_rx_urbs != 1) {
1843 dev_err(&serial->parent->interface->dev,
1844 "ERROR: mux'd reads with multiple buffers "
1845 "not possible\n");
1846 return 0;
1847 }
1848 return mux_device_request(serial,
1849 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1850 serial->parent->port_spec & HSO_PORT_MASK,
1851 serial->rx_urb[0],
1852 &serial->ctrl_req_rx,
1853 serial->rx_data[0], serial->rx_data_length);
1854}
1855
1856/* used for muxed serial port callback (muxed serial read) */
1857static void intr_callback(struct urb *urb)
1858{
1859 struct hso_shared_int *shared_int = urb->context;
1860 struct hso_serial *serial;
1861 unsigned char *port_req;
1862 int status = urb->status;
1863 int i;
1864
1865 usb_mark_last_busy(urb->dev);
1866
1867 /* sanity check */
1868 if (!shared_int)
1869 return;
1870
1871 /* status check */
1872 if (status) {
1873 handle_usb_error(status, __func__, NULL);
1874 return;
1875 }
1876 D4("\n--- Got intr callback 0x%02X ---", status);
1877
1878 /* what request? */
1879 port_req = urb->transfer_buffer;
1880 D4(" port_req = 0x%.2X\n", *port_req);
1881 /* loop over all muxed ports to find the one sending this */
1882 for (i = 0; i < 8; i++) {
1883 /* max 8 channels on MUX */
1884 if (*port_req & (1 << i)) {
1885 serial = get_serial_by_shared_int_and_type(shared_int,
1886 (1 << i));
1887 if (serial != NULL) {
1888 D1("Pending read interrupt on port %d\n", i);
1889 spin_lock(&serial->serial_lock);
1890 if (serial->rx_state == RX_IDLE &&
1891 serial->port.count > 0) {
1892 /* Setup and send a ctrl req read on
1893 * port i */
1894 if (!serial->rx_urb_filled[0]) {
1895 serial->rx_state = RX_SENT;
1896 hso_mux_serial_read(serial);
1897 } else
1898 serial->rx_state = RX_PENDING;
1899 } else {
1900 D1("Already a read pending on "
1901 "port %d or port not open\n", i);
1902 }
1903 spin_unlock(&serial->serial_lock);
1904 }
1905 }
1906 }
1907 /* Resubmit interrupt urb */
1908 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1909}
1910
1911/* called for writing to muxed serial port */
1912static int hso_mux_serial_write_data(struct hso_serial *serial)
1913{
1914 if (NULL == serial)
1915 return -EINVAL;
1916
1917 return mux_device_request(serial,
1918 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1919 serial->parent->port_spec & HSO_PORT_MASK,
1920 serial->tx_urb,
1921 &serial->ctrl_req_tx,
1922 serial->tx_data, serial->tx_data_count);
1923}
1924
1925/* write callback for Diag and CS port */
1926static void hso_std_serial_write_bulk_callback(struct urb *urb)
1927{
1928 struct hso_serial *serial = urb->context;
1929 int status = urb->status;
1930 struct tty_struct *tty;
1931
1932 /* sanity check */
1933 if (!serial) {
1934 D1("serial == NULL");
1935 return;
1936 }
1937
1938 spin_lock(&serial->serial_lock);
1939 serial->tx_urb_used = 0;
1940 spin_unlock(&serial->serial_lock);
1941 if (status) {
1942 handle_usb_error(status, __func__, serial->parent);
1943 return;
1944 }
1945 hso_put_activity(serial->parent);
1946 tty = tty_port_tty_get(&serial->port);
1947 if (tty) {
1948 tty_wakeup(tty);
1949 tty_kref_put(tty);
1950 }
1951 hso_kick_transmit(serial);
1952
1953 D1(" ");
1954}
1955
1956/* called for writing diag or CS serial port */
1957static int hso_std_serial_write_data(struct hso_serial *serial)
1958{
1959 int count = serial->tx_data_count;
1960 int result;
1961
1962 usb_fill_bulk_urb(serial->tx_urb,
1963 serial->parent->usb,
1964 usb_sndbulkpipe(serial->parent->usb,
1965 serial->out_endp->
1966 bEndpointAddress & 0x7F),
1967 serial->tx_data, serial->tx_data_count,
1968 hso_std_serial_write_bulk_callback, serial);
1969
1970 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1971 if (result) {
1972 dev_warn(&serial->parent->usb->dev,
1973 "Failed to submit urb - res %d\n", result);
1974 return result;
1975 }
1976
1977 return count;
1978}
1979
1980/* callback after read or write on muxed serial port */
1981static void ctrl_callback(struct urb *urb)
1982{
1983 struct hso_serial *serial = urb->context;
1984 struct usb_ctrlrequest *req;
1985 int status = urb->status;
1986
1987 /* sanity check */
1988 if (!serial)
1989 return;
1990
1991 spin_lock(&serial->serial_lock);
1992 serial->tx_urb_used = 0;
1993 spin_unlock(&serial->serial_lock);
1994 if (status) {
1995 handle_usb_error(status, __func__, serial->parent);
1996 return;
1997 }
1998
1999 /* what request? */
2000 req = (struct usb_ctrlrequest *)(urb->setup_packet);
2001 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2002 D4("Actual length of urb = %d\n", urb->actual_length);
2003 DUMP1(urb->transfer_buffer, urb->actual_length);
2004
2005 if (req->bRequestType ==
2006 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2007 /* response to a read command */
2008 serial->rx_urb_filled[0] = 1;
2009 spin_lock(&serial->serial_lock);
2010 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2011 spin_unlock(&serial->serial_lock);
2012 } else {
2013 struct tty_struct *tty = tty_port_tty_get(&serial->port);
2014 hso_put_activity(serial->parent);
2015 if (tty) {
2016 tty_wakeup(tty);
2017 tty_kref_put(tty);
2018 }
2019 /* response to a write command */
2020 hso_kick_transmit(serial);
2021 }
2022}
2023
2024/* handle RX data for serial port */
2025static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2026{
2027 struct tty_struct *tty;
2028 int write_length_remaining = 0;
2029 int curr_write_len;
2030
2031 /* Sanity check */
2032 if (urb == NULL || serial == NULL) {
2033 D1("serial = NULL");
2034 return -2;
2035 }
2036
2037 tty = tty_port_tty_get(&serial->port);
2038
2039 /* Push data to tty */
2040 if (tty) {
2041 write_length_remaining = urb->actual_length -
2042 serial->curr_rx_urb_offset;
2043 D1("data to push to tty");
2044 while (write_length_remaining) {
2045 if (test_bit(TTY_THROTTLED, &tty->flags)) {
2046 tty_kref_put(tty);
2047 return -1;
2048 }
2049 curr_write_len = tty_insert_flip_string
2050 (tty, urb->transfer_buffer +
2051 serial->curr_rx_urb_offset,
2052 write_length_remaining);
2053 serial->curr_rx_urb_offset += curr_write_len;
2054 write_length_remaining -= curr_write_len;
2055 tty_flip_buffer_push(tty);
2056 }
2057 tty_kref_put(tty);
2058 }
2059 if (write_length_remaining == 0) {
2060 serial->curr_rx_urb_offset = 0;
2061 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2062 }
2063 return write_length_remaining;
2064}
2065
2066
2067/* Base driver functions */
2068
2069static void hso_log_port(struct hso_device *hso_dev)
2070{
2071 char *port_type;
2072 char port_dev[20];
2073
2074 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2075 case HSO_PORT_CONTROL:
2076 port_type = "Control";
2077 break;
2078 case HSO_PORT_APP:
2079 port_type = "Application";
2080 break;
2081 case HSO_PORT_GPS:
2082 port_type = "GPS";
2083 break;
2084 case HSO_PORT_GPS_CONTROL:
2085 port_type = "GPS control";
2086 break;
2087 case HSO_PORT_APP2:
2088 port_type = "Application2";
2089 break;
2090 case HSO_PORT_PCSC:
2091 port_type = "PCSC";
2092 break;
2093 case HSO_PORT_DIAG:
2094 port_type = "Diagnostic";
2095 break;
2096 case HSO_PORT_DIAG2:
2097 port_type = "Diagnostic2";
2098 break;
2099 case HSO_PORT_MODEM:
2100 port_type = "Modem";
2101 break;
2102 case HSO_PORT_NETWORK:
2103 port_type = "Network";
2104 break;
2105 default:
2106 port_type = "Unknown";
2107 break;
2108 }
2109 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2110 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2111 } else
2112 sprintf(port_dev, "/dev/%s%d", tty_filename,
2113 dev2ser(hso_dev)->minor);
2114
2115 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2116 port_type, port_dev);
2117}
2118
2119static int hso_start_net_device(struct hso_device *hso_dev)
2120{
2121 int i, result = 0;
2122 struct hso_net *hso_net = dev2net(hso_dev);
2123
2124 if (!hso_net)
2125 return -ENODEV;
2126
2127 /* send URBs for all read buffers */
2128 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2129
2130 /* Prep a receive URB */
2131 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2132 hso_dev->usb,
2133 usb_rcvbulkpipe(hso_dev->usb,
2134 hso_net->in_endp->
2135 bEndpointAddress & 0x7F),
2136 hso_net->mux_bulk_rx_buf_pool[i],
2137 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2138 hso_net);
2139
2140 /* Put it out there so the device can send us stuff */
2141 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2142 GFP_NOIO);
2143 if (result)
2144 dev_warn(&hso_dev->usb->dev,
2145 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2146 i, result);
2147 }
2148
2149 return result;
2150}
2151
2152static int hso_stop_net_device(struct hso_device *hso_dev)
2153{
2154 int i;
2155 struct hso_net *hso_net = dev2net(hso_dev);
2156
2157 if (!hso_net)
2158 return -ENODEV;
2159
2160 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2161 if (hso_net->mux_bulk_rx_urb_pool[i])
2162 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2163
2164 }
2165 if (hso_net->mux_bulk_tx_urb)
2166 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2167
2168 return 0;
2169}
2170
2171static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2172{
2173 int i, result = 0;
2174 struct hso_serial *serial = dev2ser(hso_dev);
2175
2176 if (!serial)
2177 return -ENODEV;
2178
2179 /* If it is not the MUX port fill in and submit a bulk urb (already
2180 * allocated in hso_serial_start) */
2181 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2182 for (i = 0; i < serial->num_rx_urbs; i++) {
2183 usb_fill_bulk_urb(serial->rx_urb[i],
2184 serial->parent->usb,
2185 usb_rcvbulkpipe(serial->parent->usb,
2186 serial->in_endp->
2187 bEndpointAddress &
2188 0x7F),
2189 serial->rx_data[i],
2190 serial->rx_data_length,
2191 hso_std_serial_read_bulk_callback,
2192 serial);
2193 result = usb_submit_urb(serial->rx_urb[i], flags);
2194 if (result) {
2195 dev_warn(&serial->parent->usb->dev,
2196 "Failed to submit urb - res %d\n",
2197 result);
2198 break;
2199 }
2200 }
2201 } else {
2202 mutex_lock(&serial->shared_int->shared_int_lock);
2203 if (!serial->shared_int->use_count) {
2204 result =
2205 hso_mux_submit_intr_urb(serial->shared_int,
2206 hso_dev->usb, flags);
2207 }
2208 serial->shared_int->use_count++;
2209 mutex_unlock(&serial->shared_int->shared_int_lock);
2210 }
2211 if (serial->tiocmget)
2212 tiocmget_submit_urb(serial,
2213 serial->tiocmget,
2214 serial->parent->usb);
2215 return result;
2216}
2217
2218static int hso_stop_serial_device(struct hso_device *hso_dev)
2219{
2220 int i;
2221 struct hso_serial *serial = dev2ser(hso_dev);
2222 struct hso_tiocmget *tiocmget;
2223
2224 if (!serial)
2225 return -ENODEV;
2226
2227 for (i = 0; i < serial->num_rx_urbs; i++) {
2228 if (serial->rx_urb[i]) {
2229 usb_kill_urb(serial->rx_urb[i]);
2230 serial->rx_urb_filled[i] = 0;
2231 }
2232 }
2233 serial->curr_rx_urb_idx = 0;
2234 serial->curr_rx_urb_offset = 0;
2235
2236 if (serial->tx_urb)
2237 usb_kill_urb(serial->tx_urb);
2238
2239 if (serial->shared_int) {
2240 mutex_lock(&serial->shared_int->shared_int_lock);
2241 if (serial->shared_int->use_count &&
2242 (--serial->shared_int->use_count == 0)) {
2243 struct urb *urb;
2244
2245 urb = serial->shared_int->shared_intr_urb;
2246 if (urb)
2247 usb_kill_urb(urb);
2248 }
2249 mutex_unlock(&serial->shared_int->shared_int_lock);
2250 }
2251 tiocmget = serial->tiocmget;
2252 if (tiocmget) {
2253 wake_up_interruptible(&tiocmget->waitq);
2254 usb_kill_urb(tiocmget->urb);
2255 }
2256
2257 return 0;
2258}
2259
2260static void hso_serial_common_free(struct hso_serial *serial)
2261{
2262 int i;
2263
2264 if (serial->parent->dev)
2265 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2266
2267 tty_unregister_device(tty_drv, serial->minor);
2268
2269 for (i = 0; i < serial->num_rx_urbs; i++) {
2270 /* unlink and free RX URB */
2271 usb_free_urb(serial->rx_urb[i]);
2272 /* free the RX buffer */
2273 kfree(serial->rx_data[i]);
2274 }
2275
2276 /* unlink and free TX URB */
2277 usb_free_urb(serial->tx_urb);
2278 kfree(serial->tx_data);
2279}
2280
2281static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2282 int rx_size, int tx_size)
2283{
2284 struct device *dev;
2285 int minor;
2286 int i;
2287
2288 minor = get_free_serial_index();
2289 if (minor < 0)
2290 goto exit;
2291
2292 /* register our minor number */
2293 serial->parent->dev = tty_register_device(tty_drv, minor,
2294 &serial->parent->interface->dev);
2295 dev = serial->parent->dev;
2296 dev_set_drvdata(dev, serial->parent);
2297 i = device_create_file(dev, &dev_attr_hsotype);
2298
2299 /* fill in specific data for later use */
2300 serial->minor = minor;
2301 serial->magic = HSO_SERIAL_MAGIC;
2302 spin_lock_init(&serial->serial_lock);
2303 tty_port_init(&serial->port);
2304 serial->num_rx_urbs = num_urbs;
2305
2306 /* RX, allocate urb and initialize */
2307
2308 /* prepare our RX buffer */
2309 serial->rx_data_length = rx_size;
2310 for (i = 0; i < serial->num_rx_urbs; i++) {
2311 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2312 if (!serial->rx_urb[i]) {
2313 dev_err(dev, "Could not allocate urb?\n");
2314 goto exit;
2315 }
2316 serial->rx_urb[i]->transfer_buffer = NULL;
2317 serial->rx_urb[i]->transfer_buffer_length = 0;
2318 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2319 GFP_KERNEL);
2320 if (!serial->rx_data[i]) {
2321 dev_err(dev, "%s - Out of memory\n", __func__);
2322 goto exit;
2323 }
2324 }
2325
2326 /* TX, allocate urb and initialize */
2327 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2328 if (!serial->tx_urb) {
2329 dev_err(dev, "Could not allocate urb?\n");
2330 goto exit;
2331 }
2332 serial->tx_urb->transfer_buffer = NULL;
2333 serial->tx_urb->transfer_buffer_length = 0;
2334 /* prepare our TX buffer */
2335 serial->tx_data_count = 0;
2336 serial->tx_buffer_count = 0;
2337 serial->tx_data_length = tx_size;
2338 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2339 if (!serial->tx_data) {
2340 dev_err(dev, "%s - Out of memory\n", __func__);
2341 goto exit;
2342 }
2343 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2344 if (!serial->tx_buffer) {
2345 dev_err(dev, "%s - Out of memory\n", __func__);
2346 goto exit;
2347 }
2348
2349 return 0;
2350exit:
2351 hso_serial_common_free(serial);
2352 return -1;
2353}
2354
2355/* Creates a general hso device */
2356static struct hso_device *hso_create_device(struct usb_interface *intf,
2357 int port_spec)
2358{
2359 struct hso_device *hso_dev;
2360
2361 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2362 if (!hso_dev)
2363 return NULL;
2364
2365 hso_dev->port_spec = port_spec;
2366 hso_dev->usb = interface_to_usbdev(intf);
2367 hso_dev->interface = intf;
2368 kref_init(&hso_dev->ref);
2369 mutex_init(&hso_dev->mutex);
2370
2371 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2372 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2373 INIT_WORK(&hso_dev->reset_device, reset_device);
2374
2375 return hso_dev;
2376}
2377
2378/* Removes a network device in the network device table */
2379static int remove_net_device(struct hso_device *hso_dev)
2380{
2381 int i;
2382
2383 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2384 if (network_table[i] == hso_dev) {
2385 network_table[i] = NULL;
2386 break;
2387 }
2388 }
2389 if (i == HSO_MAX_NET_DEVICES)
2390 return -1;
2391 return 0;
2392}
2393
2394/* Frees our network device */
2395static void hso_free_net_device(struct hso_device *hso_dev)
2396{
2397 int i;
2398 struct hso_net *hso_net = dev2net(hso_dev);
2399
2400 if (!hso_net)
2401 return;
2402
2403 remove_net_device(hso_net->parent);
2404
2405 if (hso_net->net)
2406 unregister_netdev(hso_net->net);
2407
2408 /* start freeing */
2409 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2410 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2411 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2412 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2413 }
2414 usb_free_urb(hso_net->mux_bulk_tx_urb);
2415 kfree(hso_net->mux_bulk_tx_buf);
2416 hso_net->mux_bulk_tx_buf = NULL;
2417
2418 if (hso_net->net)
2419 free_netdev(hso_net->net);
2420
2421 kfree(hso_dev);
2422}
2423
2424static const struct net_device_ops hso_netdev_ops = {
2425 .ndo_open = hso_net_open,
2426 .ndo_stop = hso_net_close,
2427 .ndo_start_xmit = hso_net_start_xmit,
2428 .ndo_tx_timeout = hso_net_tx_timeout,
2429};
2430
2431/* initialize the network interface */
2432static void hso_net_init(struct net_device *net)
2433{
2434 struct hso_net *hso_net = netdev_priv(net);
2435
2436 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2437
2438 /* fill in the other fields */
2439 net->netdev_ops = &hso_netdev_ops;
2440 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2441 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2442 net->type = ARPHRD_NONE;
2443 net->mtu = DEFAULT_MTU - 14;
2444 net->tx_queue_len = 10;
2445 SET_ETHTOOL_OPS(net, &ops);
2446
2447 /* and initialize the semaphore */
2448 spin_lock_init(&hso_net->net_lock);
2449}
2450
2451/* Adds a network device in the network device table */
2452static int add_net_device(struct hso_device *hso_dev)
2453{
2454 int i;
2455
2456 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2457 if (network_table[i] == NULL) {
2458 network_table[i] = hso_dev;
2459 break;
2460 }
2461 }
2462 if (i == HSO_MAX_NET_DEVICES)
2463 return -1;
2464 return 0;
2465}
2466
2467static int hso_rfkill_set_block(void *data, bool blocked)
2468{
2469 struct hso_device *hso_dev = data;
2470 int enabled = !blocked;
2471 int rv;
2472
2473 mutex_lock(&hso_dev->mutex);
2474 if (hso_dev->usb_gone)
2475 rv = 0;
2476 else
2477 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2478 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2479 USB_CTRL_SET_TIMEOUT);
2480 mutex_unlock(&hso_dev->mutex);
2481 return rv;
2482}
2483
2484static const struct rfkill_ops hso_rfkill_ops = {
2485 .set_block = hso_rfkill_set_block,
2486};
2487
2488/* Creates and sets up everything for rfkill */
2489static void hso_create_rfkill(struct hso_device *hso_dev,
2490 struct usb_interface *interface)
2491{
2492 struct hso_net *hso_net = dev2net(hso_dev);
2493 struct device *dev = &hso_net->net->dev;
2494 char *rfkn;
2495
2496 rfkn = kzalloc(20, GFP_KERNEL);
2497 if (!rfkn)
2498 dev_err(dev, "%s - Out of memory\n", __func__);
2499
2500 snprintf(rfkn, 20, "hso-%d",
2501 interface->altsetting->desc.bInterfaceNumber);
2502
2503 hso_net->rfkill = rfkill_alloc(rfkn,
2504 &interface_to_usbdev(interface)->dev,
2505 RFKILL_TYPE_WWAN,
2506 &hso_rfkill_ops, hso_dev);
2507 if (!hso_net->rfkill) {
2508 dev_err(dev, "%s - Out of memory\n", __func__);
2509 kfree(rfkn);
2510 return;
2511 }
2512 if (rfkill_register(hso_net->rfkill) < 0) {
2513 rfkill_destroy(hso_net->rfkill);
2514 kfree(rfkn);
2515 hso_net->rfkill = NULL;
2516 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2517 return;
2518 }
2519}
2520
2521static struct device_type hso_type = {
2522 .name = "wwan",
2523};
2524
2525/* Creates our network device */
2526static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2527 int port_spec)
2528{
2529 int result, i;
2530 struct net_device *net;
2531 struct hso_net *hso_net;
2532 struct hso_device *hso_dev;
2533
2534 hso_dev = hso_create_device(interface, port_spec);
2535 if (!hso_dev)
2536 return NULL;
2537
2538 /* allocate our network device, then we can put in our private data */
2539 /* call hso_net_init to do the basic initialization */
2540 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2541 if (!net) {
2542 dev_err(&interface->dev, "Unable to create ethernet device\n");
2543 goto exit;
2544 }
2545
2546 hso_net = netdev_priv(net);
2547
2548 hso_dev->port_data.dev_net = hso_net;
2549 hso_net->net = net;
2550 hso_net->parent = hso_dev;
2551
2552 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2553 USB_DIR_IN);
2554 if (!hso_net->in_endp) {
2555 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2556 goto exit;
2557 }
2558 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2559 USB_DIR_OUT);
2560 if (!hso_net->out_endp) {
2561 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2562 goto exit;
2563 }
2564 SET_NETDEV_DEV(net, &interface->dev);
2565 SET_NETDEV_DEVTYPE(net, &hso_type);
2566
2567 /* registering our net device */
2568 result = register_netdev(net);
2569 if (result) {
2570 dev_err(&interface->dev, "Failed to register device\n");
2571 goto exit;
2572 }
2573
2574 /* start allocating */
2575 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2576 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2577 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2578 dev_err(&interface->dev, "Could not allocate rx urb\n");
2579 goto exit;
2580 }
2581 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2582 GFP_KERNEL);
2583 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2584 dev_err(&interface->dev, "Could not allocate rx buf\n");
2585 goto exit;
2586 }
2587 }
2588 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2589 if (!hso_net->mux_bulk_tx_urb) {
2590 dev_err(&interface->dev, "Could not allocate tx urb\n");
2591 goto exit;
2592 }
2593 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2594 if (!hso_net->mux_bulk_tx_buf) {
2595 dev_err(&interface->dev, "Could not allocate tx buf\n");
2596 goto exit;
2597 }
2598
2599 add_net_device(hso_dev);
2600
2601 hso_log_port(hso_dev);
2602
2603 hso_create_rfkill(hso_dev, interface);
2604
2605 return hso_dev;
2606exit:
2607 hso_free_net_device(hso_dev);
2608 return NULL;
2609}
2610
2611static void hso_free_tiomget(struct hso_serial *serial)
2612{
2613 struct hso_tiocmget *tiocmget;
2614 if (!serial)
2615 return;
2616 tiocmget = serial->tiocmget;
2617 if (tiocmget) {
2618 usb_free_urb(tiocmget->urb);
2619 tiocmget->urb = NULL;
2620 serial->tiocmget = NULL;
2621 kfree(tiocmget);
2622 }
2623}
2624
2625/* Frees an AT channel ( goes for both mux and non-mux ) */
2626static void hso_free_serial_device(struct hso_device *hso_dev)
2627{
2628 struct hso_serial *serial = dev2ser(hso_dev);
2629
2630 if (!serial)
2631 return;
2632 set_serial_by_index(serial->minor, NULL);
2633
2634 hso_serial_common_free(serial);
2635
2636 if (serial->shared_int) {
2637 mutex_lock(&serial->shared_int->shared_int_lock);
2638 if (--serial->shared_int->ref_count == 0)
2639 hso_free_shared_int(serial->shared_int);
2640 else
2641 mutex_unlock(&serial->shared_int->shared_int_lock);
2642 }
2643 hso_free_tiomget(serial);
2644 kfree(serial);
2645 kfree(hso_dev);
2646}
2647
2648/* Creates a bulk AT channel */
2649static struct hso_device *hso_create_bulk_serial_device(
2650 struct usb_interface *interface, int port)
2651{
2652 struct hso_device *hso_dev;
2653 struct hso_serial *serial;
2654 int num_urbs;
2655 struct hso_tiocmget *tiocmget;
2656
2657 hso_dev = hso_create_device(interface, port);
2658 if (!hso_dev)
2659 return NULL;
2660
2661 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2662 if (!serial)
2663 goto exit;
2664
2665 serial->parent = hso_dev;
2666 hso_dev->port_data.dev_serial = serial;
2667
2668 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2669 num_urbs = 2;
2670 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2671 GFP_KERNEL);
2672 /* it isn't going to break our heart if serial->tiocmget
2673 * allocation fails don't bother checking this.
2674 */
2675 if (serial->tiocmget) {
2676 tiocmget = serial->tiocmget;
2677 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2678 if (tiocmget->urb) {
2679 mutex_init(&tiocmget->mutex);
2680 init_waitqueue_head(&tiocmget->waitq);
2681 tiocmget->endp = hso_get_ep(
2682 interface,
2683 USB_ENDPOINT_XFER_INT,
2684 USB_DIR_IN);
2685 } else
2686 hso_free_tiomget(serial);
2687 }
2688 }
2689 else
2690 num_urbs = 1;
2691
2692 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2693 BULK_URB_TX_SIZE))
2694 goto exit;
2695
2696 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2697 USB_DIR_IN);
2698 if (!serial->in_endp) {
2699 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2700 goto exit2;
2701 }
2702
2703 if (!
2704 (serial->out_endp =
2705 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2706 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2707 goto exit2;
2708 }
2709
2710 serial->write_data = hso_std_serial_write_data;
2711
2712 /* and record this serial */
2713 set_serial_by_index(serial->minor, serial);
2714
2715 /* setup the proc dirs and files if needed */
2716 hso_log_port(hso_dev);
2717
2718 /* done, return it */
2719 return hso_dev;
2720
2721exit2:
2722 hso_serial_common_free(serial);
2723exit:
2724 hso_free_tiomget(serial);
2725 kfree(serial);
2726 kfree(hso_dev);
2727 return NULL;
2728}
2729
2730/* Creates a multiplexed AT channel */
2731static
2732struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2733 int port,
2734 struct hso_shared_int *mux)
2735{
2736 struct hso_device *hso_dev;
2737 struct hso_serial *serial;
2738 int port_spec;
2739
2740 port_spec = HSO_INTF_MUX;
2741 port_spec &= ~HSO_PORT_MASK;
2742
2743 port_spec |= hso_mux_to_port(port);
2744 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2745 return NULL;
2746
2747 hso_dev = hso_create_device(interface, port_spec);
2748 if (!hso_dev)
2749 return NULL;
2750
2751 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2752 if (!serial)
2753 goto exit;
2754
2755 hso_dev->port_data.dev_serial = serial;
2756 serial->parent = hso_dev;
2757
2758 if (hso_serial_common_create
2759 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2760 goto exit;
2761
2762 serial->tx_data_length--;
2763 serial->write_data = hso_mux_serial_write_data;
2764
2765 serial->shared_int = mux;
2766 mutex_lock(&serial->shared_int->shared_int_lock);
2767 serial->shared_int->ref_count++;
2768 mutex_unlock(&serial->shared_int->shared_int_lock);
2769
2770 /* and record this serial */
2771 set_serial_by_index(serial->minor, serial);
2772
2773 /* setup the proc dirs and files if needed */
2774 hso_log_port(hso_dev);
2775
2776 /* done, return it */
2777 return hso_dev;
2778
2779exit:
2780 if (serial) {
2781 tty_unregister_device(tty_drv, serial->minor);
2782 kfree(serial);
2783 }
2784 if (hso_dev)
2785 kfree(hso_dev);
2786 return NULL;
2787
2788}
2789
2790static void hso_free_shared_int(struct hso_shared_int *mux)
2791{
2792 usb_free_urb(mux->shared_intr_urb);
2793 kfree(mux->shared_intr_buf);
2794 mutex_unlock(&mux->shared_int_lock);
2795 kfree(mux);
2796}
2797
2798static
2799struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2800{
2801 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2802
2803 if (!mux)
2804 return NULL;
2805
2806 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2807 USB_DIR_IN);
2808 if (!mux->intr_endp) {
2809 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2810 goto exit;
2811 }
2812
2813 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2814 if (!mux->shared_intr_urb) {
2815 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2816 goto exit;
2817 }
2818 mux->shared_intr_buf =
2819 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2820 GFP_KERNEL);
2821 if (!mux->shared_intr_buf) {
2822 dev_err(&interface->dev, "Could not allocate intr buf?\n");
2823 goto exit;
2824 }
2825
2826 mutex_init(&mux->shared_int_lock);
2827
2828 return mux;
2829
2830exit:
2831 kfree(mux->shared_intr_buf);
2832 usb_free_urb(mux->shared_intr_urb);
2833 kfree(mux);
2834 return NULL;
2835}
2836
2837/* Gets the port spec for a certain interface */
2838static int hso_get_config_data(struct usb_interface *interface)
2839{
2840 struct usb_device *usbdev = interface_to_usbdev(interface);
2841 u8 config_data[17];
2842 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2843 s32 result;
2844
2845 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2846 0x86, 0xC0, 0, 0, config_data, 17,
2847 USB_CTRL_SET_TIMEOUT) != 0x11) {
2848 return -EIO;
2849 }
2850
2851 switch (config_data[if_num]) {
2852 case 0x0:
2853 result = 0;
2854 break;
2855 case 0x1:
2856 result = HSO_PORT_DIAG;
2857 break;
2858 case 0x2:
2859 result = HSO_PORT_GPS;
2860 break;
2861 case 0x3:
2862 result = HSO_PORT_GPS_CONTROL;
2863 break;
2864 case 0x4:
2865 result = HSO_PORT_APP;
2866 break;
2867 case 0x5:
2868 result = HSO_PORT_APP2;
2869 break;
2870 case 0x6:
2871 result = HSO_PORT_CONTROL;
2872 break;
2873 case 0x7:
2874 result = HSO_PORT_NETWORK;
2875 break;
2876 case 0x8:
2877 result = HSO_PORT_MODEM;
2878 break;
2879 case 0x9:
2880 result = HSO_PORT_MSD;
2881 break;
2882 case 0xa:
2883 result = HSO_PORT_PCSC;
2884 break;
2885 case 0xb:
2886 result = HSO_PORT_VOICE;
2887 break;
2888 default:
2889 result = 0;
2890 }
2891
2892 if (result)
2893 result |= HSO_INTF_BULK;
2894
2895 if (config_data[16] & 0x1)
2896 result |= HSO_INFO_CRC_BUG;
2897
2898 return result;
2899}
2900
2901/* called once for each interface upon device insertion */
2902static int hso_probe(struct usb_interface *interface,
2903 const struct usb_device_id *id)
2904{
2905 int mux, i, if_num, port_spec;
2906 unsigned char port_mask;
2907 struct hso_device *hso_dev = NULL;
2908 struct hso_shared_int *shared_int;
2909 struct hso_device *tmp_dev = NULL;
2910
2911 if_num = interface->altsetting->desc.bInterfaceNumber;
2912
2913 /* Get the interface/port specification from either driver_info or from
2914 * the device itself */
2915 if (id->driver_info)
2916 port_spec = ((u32 *)(id->driver_info))[if_num];
2917 else
2918 port_spec = hso_get_config_data(interface);
2919
2920 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2921 dev_err(&interface->dev, "Not our interface\n");
2922 return -ENODEV;
2923 }
2924 /* Check if we need to switch to alt interfaces prior to port
2925 * configuration */
2926 if (interface->num_altsetting > 1)
2927 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2928 interface->needs_remote_wakeup = 1;
2929
2930 /* Allocate new hso device(s) */
2931 switch (port_spec & HSO_INTF_MASK) {
2932 case HSO_INTF_MUX:
2933 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2934 /* Create the network device */
2935 if (!disable_net) {
2936 hso_dev = hso_create_net_device(interface,
2937 port_spec);
2938 if (!hso_dev)
2939 goto exit;
2940 tmp_dev = hso_dev;
2941 }
2942 }
2943
2944 if (hso_get_mux_ports(interface, &port_mask))
2945 /* TODO: de-allocate everything */
2946 goto exit;
2947
2948 shared_int = hso_create_shared_int(interface);
2949 if (!shared_int)
2950 goto exit;
2951
2952 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2953 if (port_mask & i) {
2954 hso_dev = hso_create_mux_serial_device(
2955 interface, i, shared_int);
2956 if (!hso_dev)
2957 goto exit;
2958 }
2959 }
2960
2961 if (tmp_dev)
2962 hso_dev = tmp_dev;
2963 break;
2964
2965 case HSO_INTF_BULK:
2966 /* It's a regular bulk interface */
2967 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2968 if (!disable_net)
2969 hso_dev =
2970 hso_create_net_device(interface, port_spec);
2971 } else {
2972 hso_dev =
2973 hso_create_bulk_serial_device(interface, port_spec);
2974 }
2975 if (!hso_dev)
2976 goto exit;
2977 break;
2978 default:
2979 goto exit;
2980 }
2981
2982 /* save our data pointer in this device */
2983 usb_set_intfdata(interface, hso_dev);
2984
2985 /* done */
2986 return 0;
2987exit:
2988 hso_free_interface(interface);
2989 return -ENODEV;
2990}
2991
2992/* device removed, cleaning up */
2993static void hso_disconnect(struct usb_interface *interface)
2994{
2995 hso_free_interface(interface);
2996
2997 /* remove reference of our private data */
2998 usb_set_intfdata(interface, NULL);
2999}
3000
3001static void async_get_intf(struct work_struct *data)
3002{
3003 struct hso_device *hso_dev =
3004 container_of(data, struct hso_device, async_get_intf);
3005 usb_autopm_get_interface(hso_dev->interface);
3006}
3007
3008static void async_put_intf(struct work_struct *data)
3009{
3010 struct hso_device *hso_dev =
3011 container_of(data, struct hso_device, async_put_intf);
3012 usb_autopm_put_interface(hso_dev->interface);
3013}
3014
3015static int hso_get_activity(struct hso_device *hso_dev)
3016{
3017 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3018 if (!hso_dev->is_active) {
3019 hso_dev->is_active = 1;
3020 schedule_work(&hso_dev->async_get_intf);
3021 }
3022 }
3023
3024 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3025 return -EAGAIN;
3026
3027 usb_mark_last_busy(hso_dev->usb);
3028
3029 return 0;
3030}
3031
3032static int hso_put_activity(struct hso_device *hso_dev)
3033{
3034 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3035 if (hso_dev->is_active) {
3036 hso_dev->is_active = 0;
3037 schedule_work(&hso_dev->async_put_intf);
3038 return -EAGAIN;
3039 }
3040 }
3041 hso_dev->is_active = 0;
3042 return 0;
3043}
3044
3045/* called by kernel when we need to suspend device */
3046static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3047{
3048 int i, result;
3049
3050 /* Stop all serial ports */
3051 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3052 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3053 result = hso_stop_serial_device(serial_table[i]);
3054 if (result)
3055 goto out;
3056 }
3057 }
3058
3059 /* Stop all network ports */
3060 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3061 if (network_table[i] &&
3062 (network_table[i]->interface == iface)) {
3063 result = hso_stop_net_device(network_table[i]);
3064 if (result)
3065 goto out;
3066 }
3067 }
3068
3069out:
3070 return 0;
3071}
3072
3073/* called by kernel when we need to resume device */
3074static int hso_resume(struct usb_interface *iface)
3075{
3076 int i, result = 0;
3077 struct hso_net *hso_net;
3078
3079 /* Start all serial ports */
3080 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3081 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3082 if (dev2ser(serial_table[i])->port.count) {
3083 result =
3084 hso_start_serial_device(serial_table[i], GFP_NOIO);
3085 hso_kick_transmit(dev2ser(serial_table[i]));
3086 if (result)
3087 goto out;
3088 }
3089 }
3090 }
3091
3092 /* Start all network ports */
3093 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3094 if (network_table[i] &&
3095 (network_table[i]->interface == iface)) {
3096 hso_net = dev2net(network_table[i]);
3097 if (hso_net->flags & IFF_UP) {
3098 /* First transmit any lingering data,
3099 then restart the device. */
3100 if (hso_net->skb_tx_buf) {
3101 dev_dbg(&iface->dev,
3102 "Transmitting"
3103 " lingering data\n");
3104 hso_net_start_xmit(hso_net->skb_tx_buf,
3105 hso_net->net);
3106 hso_net->skb_tx_buf = NULL;
3107 }
3108 result = hso_start_net_device(network_table[i]);
3109 if (result)
3110 goto out;
3111 }
3112 }
3113 }
3114
3115out:
3116 return result;
3117}
3118
3119static void reset_device(struct work_struct *data)
3120{
3121 struct hso_device *hso_dev =
3122 container_of(data, struct hso_device, reset_device);
3123 struct usb_device *usb = hso_dev->usb;
3124 int result;
3125
3126 if (hso_dev->usb_gone) {
3127 D1("No reset during disconnect\n");
3128 } else {
3129 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3130 if (result < 0)
3131 D1("unable to lock device for reset: %d\n", result);
3132 else {
3133 usb_reset_device(usb);
3134 usb_unlock_device(usb);
3135 }
3136 }
3137}
3138
3139static void hso_serial_ref_free(struct kref *ref)
3140{
3141 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3142
3143 hso_free_serial_device(hso_dev);
3144}
3145
3146static void hso_free_interface(struct usb_interface *interface)
3147{
3148 struct hso_serial *hso_dev;
3149 struct tty_struct *tty;
3150 int i;
3151
3152 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3153 if (serial_table[i] &&
3154 (serial_table[i]->interface == interface)) {
3155 hso_dev = dev2ser(serial_table[i]);
3156 tty = tty_port_tty_get(&hso_dev->port);
3157 if (tty) {
3158 tty_hangup(tty);
3159 tty_kref_put(tty);
3160 }
3161 mutex_lock(&hso_dev->parent->mutex);
3162 hso_dev->parent->usb_gone = 1;
3163 mutex_unlock(&hso_dev->parent->mutex);
3164 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3165 }
3166 }
3167
3168 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3169 if (network_table[i] &&
3170 (network_table[i]->interface == interface)) {
3171 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3172 /* hso_stop_net_device doesn't stop the net queue since
3173 * traffic needs to start it again when suspended */
3174 netif_stop_queue(dev2net(network_table[i])->net);
3175 hso_stop_net_device(network_table[i]);
3176 cancel_work_sync(&network_table[i]->async_put_intf);
3177 cancel_work_sync(&network_table[i]->async_get_intf);
3178 if (rfk) {
3179 rfkill_unregister(rfk);
3180 rfkill_destroy(rfk);
3181 }
3182 hso_free_net_device(network_table[i]);
3183 }
3184 }
3185}
3186
3187/* Helper functions */
3188
3189/* Get the endpoint ! */
3190static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3191 int type, int dir)
3192{
3193 int i;
3194 struct usb_host_interface *iface = intf->cur_altsetting;
3195 struct usb_endpoint_descriptor *endp;
3196
3197 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3198 endp = &iface->endpoint[i].desc;
3199 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3200 (usb_endpoint_type(endp) == type))
3201 return endp;
3202 }
3203
3204 return NULL;
3205}
3206
3207/* Get the byte that describes which ports are enabled */
3208static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3209{
3210 int i;
3211 struct usb_host_interface *iface = intf->cur_altsetting;
3212
3213 if (iface->extralen == 3) {
3214 *ports = iface->extra[2];
3215 return 0;
3216 }
3217
3218 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3219 if (iface->endpoint[i].extralen == 3) {
3220 *ports = iface->endpoint[i].extra[2];
3221 return 0;
3222 }
3223 }
3224
3225 return -1;
3226}
3227
3228/* interrupt urb needs to be submitted, used for serial read of muxed port */
3229static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3230 struct usb_device *usb, gfp_t gfp)
3231{
3232 int result;
3233
3234 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3235 usb_rcvintpipe(usb,
3236 shared_int->intr_endp->bEndpointAddress & 0x7F),
3237 shared_int->shared_intr_buf,
3238 1,
3239 intr_callback, shared_int,
3240 shared_int->intr_endp->bInterval);
3241
3242 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3243 if (result)
3244 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3245 result);
3246
3247 return result;
3248}
3249
3250/* operations setup of the serial interface */
3251static const struct tty_operations hso_serial_ops = {
3252 .open = hso_serial_open,
3253 .close = hso_serial_close,
3254 .write = hso_serial_write,
3255 .write_room = hso_serial_write_room,
3256 .ioctl = hso_serial_ioctl,
3257 .set_termios = hso_serial_set_termios,
3258 .chars_in_buffer = hso_serial_chars_in_buffer,
3259 .tiocmget = hso_serial_tiocmget,
3260 .tiocmset = hso_serial_tiocmset,
3261 .get_icount = hso_get_count,
3262 .unthrottle = hso_unthrottle
3263};
3264
3265static struct usb_driver hso_driver = {
3266 .name = driver_name,
3267 .probe = hso_probe,
3268 .disconnect = hso_disconnect,
3269 .id_table = hso_ids,
3270 .suspend = hso_suspend,
3271 .resume = hso_resume,
3272 .reset_resume = hso_resume,
3273 .supports_autosuspend = 1,
3274 .disable_hub_initiated_lpm = 1,
3275};
3276
3277static int __init hso_init(void)
3278{
3279 int i;
3280 int result;
3281
3282 /* put it in the log */
3283 printk(KERN_INFO "hso: %s\n", version);
3284
3285 /* Initialise the serial table semaphore and table */
3286 spin_lock_init(&serial_table_lock);
3287 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3288 serial_table[i] = NULL;
3289
3290 /* allocate our driver using the proper amount of supported minors */
3291 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3292 if (!tty_drv)
3293 return -ENOMEM;
3294
3295 /* fill in all needed values */
3296 tty_drv->driver_name = driver_name;
3297 tty_drv->name = tty_filename;
3298
3299 /* if major number is provided as parameter, use that one */
3300 if (tty_major)
3301 tty_drv->major = tty_major;
3302
3303 tty_drv->minor_start = 0;
3304 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3305 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3306 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3307 tty_drv->init_termios = tty_std_termios;
3308 hso_init_termios(&tty_drv->init_termios);
3309 tty_set_operations(tty_drv, &hso_serial_ops);
3310
3311 /* register the tty driver */
3312 result = tty_register_driver(tty_drv);
3313 if (result) {
3314 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3315 __func__, result);
3316 goto err_free_tty;
3317 }
3318
3319 /* register this module as an usb driver */
3320 result = usb_register(&hso_driver);
3321 if (result) {
3322 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3323 result);
3324 goto err_unreg_tty;
3325 }
3326
3327 /* done */
3328 return 0;
3329err_unreg_tty:
3330 tty_unregister_driver(tty_drv);
3331err_free_tty:
3332 put_tty_driver(tty_drv);
3333 return result;
3334}
3335
3336static void __exit hso_exit(void)
3337{
3338 printk(KERN_INFO "hso: unloaded\n");
3339
3340 tty_unregister_driver(tty_drv);
3341 put_tty_driver(tty_drv);
3342 /* deregister the usb driver */
3343 usb_deregister(&hso_driver);
3344}
3345
3346/* Module definitions */
3347module_init(hso_init);
3348module_exit(hso_exit);
3349
3350MODULE_AUTHOR(MOD_AUTHOR);
3351MODULE_DESCRIPTION(MOD_DESCRIPTION);
3352MODULE_LICENSE(MOD_LICENSE);
3353
3354/* change the debug level (eg: insmod hso.ko debug=0x04) */
3355MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3356module_param(debug, int, S_IRUGO | S_IWUSR);
3357
3358/* set the major tty number (eg: insmod hso.ko tty_major=245) */
3359MODULE_PARM_DESC(tty_major, "Set the major tty number");
3360module_param(tty_major, int, S_IRUGO | S_IWUSR);
3361
3362/* disable network interface (eg: insmod hso.ko disable_net=1) */
3363MODULE_PARM_DESC(disable_net, "Disable the network interface");
3364module_param(disable_net, int, S_IRUGO | S_IWUSR);