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