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1// SPDX-License-Identifier: GPL-2.0-only
2/******************************************************************************
3 *
4 * Driver for Option High Speed Mobile Devices.
5 *
6 * Copyright (C) 2008 Option International
7 * Filip Aben <f.aben@option.com>
8 * Denis Joseph Barrow <d.barow@option.com>
9 * Jan Dumon <j.dumon@option.com>
10 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
11 * <ajb@spheresystems.co.uk>
12 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
13 * Copyright (C) 2008 Novell, Inc.
14 *
15 *****************************************************************************/
16
17/******************************************************************************
18 *
19 * Description of the device:
20 *
21 * Interface 0: Contains the IP network interface on the bulk end points.
22 * The multiplexed serial ports are using the interrupt and
23 * control endpoints.
24 * Interrupt contains a bitmap telling which multiplexed
25 * serialport needs servicing.
26 *
27 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
28 * port is opened, as this have a huge impact on the network port
29 * throughput.
30 *
31 * Interface 2: Standard modem interface - circuit switched interface, this
32 * can be used to make a standard ppp connection however it
33 * should not be used in conjunction with the IP network interface
34 * enabled for USB performance reasons i.e. if using this set
35 * ideally disable_net=1.
36 *
37 *****************************************************************************/
38
39#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
40
41#include <linux/sched/signal.h>
42#include <linux/slab.h>
43#include <linux/init.h>
44#include <linux/delay.h>
45#include <linux/netdevice.h>
46#include <linux/module.h>
47#include <linux/ethtool.h>
48#include <linux/usb.h>
49#include <linux/tty.h>
50#include <linux/tty_driver.h>
51#include <linux/tty_flip.h>
52#include <linux/kmod.h>
53#include <linux/rfkill.h>
54#include <linux/ip.h>
55#include <linux/uaccess.h>
56#include <linux/usb/cdc.h>
57#include <net/arp.h>
58#include <asm/byteorder.h>
59#include <linux/serial_core.h>
60#include <linux/serial.h>
61
62
63#define MOD_AUTHOR "Option Wireless"
64#define MOD_DESCRIPTION "USB High Speed Option driver"
65
66#define HSO_MAX_NET_DEVICES 10
67#define HSO__MAX_MTU 2048
68#define DEFAULT_MTU 1500
69#define DEFAULT_MRU 1500
70
71#define CTRL_URB_RX_SIZE 1024
72#define CTRL_URB_TX_SIZE 64
73
74#define BULK_URB_RX_SIZE 4096
75#define BULK_URB_TX_SIZE 8192
76
77#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
78#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
79#define MUX_BULK_RX_BUF_COUNT 4
80#define USB_TYPE_OPTION_VENDOR 0x20
81
82/* These definitions are used with the struct hso_net flags element */
83/* - use *_bit operations on it. (bit indices not values.) */
84#define HSO_NET_RUNNING 0
85
86#define HSO_NET_TX_TIMEOUT (HZ*10)
87
88#define HSO_SERIAL_MAGIC 0x48534f31
89
90/* Number of ttys to handle */
91#define HSO_SERIAL_TTY_MINORS 256
92
93#define MAX_RX_URBS 2
94
95/*****************************************************************************/
96/* Debugging functions */
97/*****************************************************************************/
98#define hso_dbg(lvl, fmt, ...) \
99do { \
100 if ((lvl) & debug) \
101 pr_info("[%d:%s] " fmt, \
102 __LINE__, __func__, ##__VA_ARGS__); \
103} while (0)
104
105/*****************************************************************************/
106/* Enumerators */
107/*****************************************************************************/
108enum pkt_parse_state {
109 WAIT_IP,
110 WAIT_DATA,
111 WAIT_SYNC
112};
113
114/*****************************************************************************/
115/* Structs */
116/*****************************************************************************/
117
118struct hso_shared_int {
119 struct usb_endpoint_descriptor *intr_endp;
120 void *shared_intr_buf;
121 struct urb *shared_intr_urb;
122 struct usb_device *usb;
123 int use_count;
124 int ref_count;
125 struct mutex shared_int_lock;
126};
127
128struct hso_net {
129 struct hso_device *parent;
130 struct net_device *net;
131 struct rfkill *rfkill;
132 char name[24];
133
134 struct usb_endpoint_descriptor *in_endp;
135 struct usb_endpoint_descriptor *out_endp;
136
137 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
138 struct urb *mux_bulk_tx_urb;
139 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
140 void *mux_bulk_tx_buf;
141
142 struct sk_buff *skb_rx_buf;
143 struct sk_buff *skb_tx_buf;
144
145 enum pkt_parse_state rx_parse_state;
146 spinlock_t net_lock;
147
148 unsigned short rx_buf_size;
149 unsigned short rx_buf_missing;
150 struct iphdr rx_ip_hdr;
151
152 unsigned long flags;
153};
154
155enum rx_ctrl_state{
156 RX_IDLE,
157 RX_SENT,
158 RX_PENDING
159};
160
161#define BM_REQUEST_TYPE (0xa1)
162#define B_NOTIFICATION (0x20)
163#define W_VALUE (0x0)
164#define W_LENGTH (0x2)
165
166#define B_OVERRUN (0x1<<6)
167#define B_PARITY (0x1<<5)
168#define B_FRAMING (0x1<<4)
169#define B_RING_SIGNAL (0x1<<3)
170#define B_BREAK (0x1<<2)
171#define B_TX_CARRIER (0x1<<1)
172#define B_RX_CARRIER (0x1<<0)
173
174struct hso_serial_state_notification {
175 u8 bmRequestType;
176 u8 bNotification;
177 u16 wValue;
178 u16 wIndex;
179 u16 wLength;
180 u16 UART_state_bitmap;
181} __packed;
182
183struct hso_tiocmget {
184 struct mutex mutex;
185 wait_queue_head_t waitq;
186 int intr_completed;
187 struct usb_endpoint_descriptor *endp;
188 struct urb *urb;
189 struct hso_serial_state_notification *serial_state_notification;
190 u16 prev_UART_state_bitmap;
191 struct uart_icount icount;
192};
193
194
195struct hso_serial {
196 struct hso_device *parent;
197 int magic;
198 u8 minor;
199
200 struct hso_shared_int *shared_int;
201
202 /* rx/tx urb could be either a bulk urb or a control urb depending
203 on which serial port it is used on. */
204 struct urb *rx_urb[MAX_RX_URBS];
205 u8 num_rx_urbs;
206 u8 *rx_data[MAX_RX_URBS];
207 u16 rx_data_length; /* should contain allocated length */
208
209 struct urb *tx_urb;
210 u8 *tx_data;
211 u8 *tx_buffer;
212 u16 tx_data_length; /* should contain allocated length */
213 u16 tx_data_count;
214 u16 tx_buffer_count;
215 struct usb_ctrlrequest ctrl_req_tx;
216 struct usb_ctrlrequest ctrl_req_rx;
217
218 struct usb_endpoint_descriptor *in_endp;
219 struct usb_endpoint_descriptor *out_endp;
220
221 enum rx_ctrl_state rx_state;
222 u8 rts_state;
223 u8 dtr_state;
224 unsigned tx_urb_used:1;
225
226 struct tty_port port;
227 /* from usb_serial_port */
228 spinlock_t serial_lock;
229
230 int (*write_data) (struct hso_serial *serial);
231 struct hso_tiocmget *tiocmget;
232 /* Hacks required to get flow control
233 * working on the serial receive buffers
234 * so as not to drop characters on the floor.
235 */
236 int curr_rx_urb_idx;
237 u8 rx_urb_filled[MAX_RX_URBS];
238 struct tasklet_struct unthrottle_tasklet;
239};
240
241struct hso_device {
242 union {
243 struct hso_serial *dev_serial;
244 struct hso_net *dev_net;
245 } port_data;
246
247 u32 port_spec;
248
249 u8 is_active;
250 u8 usb_gone;
251 struct work_struct async_get_intf;
252 struct work_struct async_put_intf;
253
254 struct usb_device *usb;
255 struct usb_interface *interface;
256
257 struct device *dev;
258 struct kref ref;
259 struct mutex mutex;
260};
261
262/* Type of interface */
263#define HSO_INTF_MASK 0xFF00
264#define HSO_INTF_MUX 0x0100
265#define HSO_INTF_BULK 0x0200
266
267/* Type of port */
268#define HSO_PORT_MASK 0xFF
269#define HSO_PORT_NO_PORT 0x0
270#define HSO_PORT_CONTROL 0x1
271#define HSO_PORT_APP 0x2
272#define HSO_PORT_GPS 0x3
273#define HSO_PORT_PCSC 0x4
274#define HSO_PORT_APP2 0x5
275#define HSO_PORT_GPS_CONTROL 0x6
276#define HSO_PORT_MSD 0x7
277#define HSO_PORT_VOICE 0x8
278#define HSO_PORT_DIAG2 0x9
279#define HSO_PORT_DIAG 0x10
280#define HSO_PORT_MODEM 0x11
281#define HSO_PORT_NETWORK 0x12
282
283/* Additional device info */
284#define HSO_INFO_MASK 0xFF000000
285#define HSO_INFO_CRC_BUG 0x01000000
286
287/*****************************************************************************/
288/* Prototypes */
289/*****************************************************************************/
290/* Serial driver functions */
291static int hso_serial_tiocmset(struct tty_struct *tty,
292 unsigned int set, unsigned int clear);
293static void ctrl_callback(struct urb *urb);
294static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
295static void hso_kick_transmit(struct hso_serial *serial);
296/* Helper functions */
297static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
298 struct usb_device *usb, gfp_t gfp);
299static void handle_usb_error(int status, const char *function,
300 struct hso_device *hso_dev);
301static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
302 int type, int dir);
303static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
304static void hso_free_interface(struct usb_interface *intf);
305static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
306static int hso_stop_serial_device(struct hso_device *hso_dev);
307static int hso_start_net_device(struct hso_device *hso_dev);
308static void hso_free_shared_int(struct hso_shared_int *shared_int);
309static int hso_stop_net_device(struct hso_device *hso_dev);
310static void hso_serial_ref_free(struct kref *ref);
311static void hso_std_serial_read_bulk_callback(struct urb *urb);
312static int hso_mux_serial_read(struct hso_serial *serial);
313static void async_get_intf(struct work_struct *data);
314static void async_put_intf(struct work_struct *data);
315static int hso_put_activity(struct hso_device *hso_dev);
316static int hso_get_activity(struct hso_device *hso_dev);
317static void tiocmget_intr_callback(struct urb *urb);
318/*****************************************************************************/
319/* Helping functions */
320/*****************************************************************************/
321
322/* #define DEBUG */
323
324static inline struct hso_net *dev2net(struct hso_device *hso_dev)
325{
326 return hso_dev->port_data.dev_net;
327}
328
329static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
330{
331 return hso_dev->port_data.dev_serial;
332}
333
334/* Debugging functions */
335#ifdef DEBUG
336static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
337 unsigned int len)
338{
339 static char name[255];
340
341 sprintf(name, "hso[%d:%s]", line_count, func_name);
342 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
343}
344
345#define DUMP(buf_, len_) \
346 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
347
348#define DUMP1(buf_, len_) \
349 do { \
350 if (0x01 & debug) \
351 DUMP(buf_, len_); \
352 } while (0)
353#else
354#define DUMP(buf_, len_)
355#define DUMP1(buf_, len_)
356#endif
357
358/* module parameters */
359static int debug;
360static int tty_major;
361static int disable_net;
362
363/* driver info */
364static const char driver_name[] = "hso";
365static const char tty_filename[] = "ttyHS";
366/* the usb driver itself (registered in hso_init) */
367static struct usb_driver hso_driver;
368/* serial structures */
369static struct tty_driver *tty_drv;
370static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
371static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
372static DEFINE_SPINLOCK(serial_table_lock);
373
374static const s32 default_port_spec[] = {
375 HSO_INTF_MUX | HSO_PORT_NETWORK,
376 HSO_INTF_BULK | HSO_PORT_DIAG,
377 HSO_INTF_BULK | HSO_PORT_MODEM,
378 0
379};
380
381static const s32 icon321_port_spec[] = {
382 HSO_INTF_MUX | HSO_PORT_NETWORK,
383 HSO_INTF_BULK | HSO_PORT_DIAG2,
384 HSO_INTF_BULK | HSO_PORT_MODEM,
385 HSO_INTF_BULK | HSO_PORT_DIAG,
386 0
387};
388
389#define default_port_device(vendor, product) \
390 USB_DEVICE(vendor, product), \
391 .driver_info = (kernel_ulong_t)default_port_spec
392
393#define icon321_port_device(vendor, product) \
394 USB_DEVICE(vendor, product), \
395 .driver_info = (kernel_ulong_t)icon321_port_spec
396
397/* list of devices we support */
398static const struct usb_device_id hso_ids[] = {
399 {default_port_device(0x0af0, 0x6711)},
400 {default_port_device(0x0af0, 0x6731)},
401 {default_port_device(0x0af0, 0x6751)},
402 {default_port_device(0x0af0, 0x6771)},
403 {default_port_device(0x0af0, 0x6791)},
404 {default_port_device(0x0af0, 0x6811)},
405 {default_port_device(0x0af0, 0x6911)},
406 {default_port_device(0x0af0, 0x6951)},
407 {default_port_device(0x0af0, 0x6971)},
408 {default_port_device(0x0af0, 0x7011)},
409 {default_port_device(0x0af0, 0x7031)},
410 {default_port_device(0x0af0, 0x7051)},
411 {default_port_device(0x0af0, 0x7071)},
412 {default_port_device(0x0af0, 0x7111)},
413 {default_port_device(0x0af0, 0x7211)},
414 {default_port_device(0x0af0, 0x7251)},
415 {default_port_device(0x0af0, 0x7271)},
416 {default_port_device(0x0af0, 0x7311)},
417 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
418 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
419 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
420 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
421 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
422 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
423 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
424 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
425 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
426 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
427 {USB_DEVICE(0x0af0, 0x7701)},
428 {USB_DEVICE(0x0af0, 0x7706)},
429 {USB_DEVICE(0x0af0, 0x7801)},
430 {USB_DEVICE(0x0af0, 0x7901)},
431 {USB_DEVICE(0x0af0, 0x7A01)},
432 {USB_DEVICE(0x0af0, 0x7A05)},
433 {USB_DEVICE(0x0af0, 0x8200)},
434 {USB_DEVICE(0x0af0, 0x8201)},
435 {USB_DEVICE(0x0af0, 0x8300)},
436 {USB_DEVICE(0x0af0, 0x8302)},
437 {USB_DEVICE(0x0af0, 0x8304)},
438 {USB_DEVICE(0x0af0, 0x8400)},
439 {USB_DEVICE(0x0af0, 0x8600)},
440 {USB_DEVICE(0x0af0, 0x8800)},
441 {USB_DEVICE(0x0af0, 0x8900)},
442 {USB_DEVICE(0x0af0, 0x9000)},
443 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */
444 {USB_DEVICE(0x0af0, 0xd035)},
445 {USB_DEVICE(0x0af0, 0xd055)},
446 {USB_DEVICE(0x0af0, 0xd155)},
447 {USB_DEVICE(0x0af0, 0xd255)},
448 {USB_DEVICE(0x0af0, 0xd057)},
449 {USB_DEVICE(0x0af0, 0xd157)},
450 {USB_DEVICE(0x0af0, 0xd257)},
451 {USB_DEVICE(0x0af0, 0xd357)},
452 {USB_DEVICE(0x0af0, 0xd058)},
453 {USB_DEVICE(0x0af0, 0xc100)},
454 {}
455};
456MODULE_DEVICE_TABLE(usb, hso_ids);
457
458/* Sysfs attribute */
459static ssize_t hsotype_show(struct device *dev,
460 struct device_attribute *attr, char *buf)
461{
462 struct hso_device *hso_dev = dev_get_drvdata(dev);
463 char *port_name;
464
465 if (!hso_dev)
466 return 0;
467
468 switch (hso_dev->port_spec & HSO_PORT_MASK) {
469 case HSO_PORT_CONTROL:
470 port_name = "Control";
471 break;
472 case HSO_PORT_APP:
473 port_name = "Application";
474 break;
475 case HSO_PORT_APP2:
476 port_name = "Application2";
477 break;
478 case HSO_PORT_GPS:
479 port_name = "GPS";
480 break;
481 case HSO_PORT_GPS_CONTROL:
482 port_name = "GPS Control";
483 break;
484 case HSO_PORT_PCSC:
485 port_name = "PCSC";
486 break;
487 case HSO_PORT_DIAG:
488 port_name = "Diagnostic";
489 break;
490 case HSO_PORT_DIAG2:
491 port_name = "Diagnostic2";
492 break;
493 case HSO_PORT_MODEM:
494 port_name = "Modem";
495 break;
496 case HSO_PORT_NETWORK:
497 port_name = "Network";
498 break;
499 default:
500 port_name = "Unknown";
501 break;
502 }
503
504 return sprintf(buf, "%s\n", port_name);
505}
506static DEVICE_ATTR_RO(hsotype);
507
508static struct attribute *hso_serial_dev_attrs[] = {
509 &dev_attr_hsotype.attr,
510 NULL
511};
512
513ATTRIBUTE_GROUPS(hso_serial_dev);
514
515static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
516{
517 int idx;
518
519 for (idx = 0; idx < serial->num_rx_urbs; idx++)
520 if (serial->rx_urb[idx] == urb)
521 return idx;
522 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
523 return -1;
524}
525
526/* converts mux value to a port spec value */
527static u32 hso_mux_to_port(int mux)
528{
529 u32 result;
530
531 switch (mux) {
532 case 0x1:
533 result = HSO_PORT_CONTROL;
534 break;
535 case 0x2:
536 result = HSO_PORT_APP;
537 break;
538 case 0x4:
539 result = HSO_PORT_PCSC;
540 break;
541 case 0x8:
542 result = HSO_PORT_GPS;
543 break;
544 case 0x10:
545 result = HSO_PORT_APP2;
546 break;
547 default:
548 result = HSO_PORT_NO_PORT;
549 }
550 return result;
551}
552
553/* converts port spec value to a mux value */
554static u32 hso_port_to_mux(int port)
555{
556 u32 result;
557
558 switch (port & HSO_PORT_MASK) {
559 case HSO_PORT_CONTROL:
560 result = 0x0;
561 break;
562 case HSO_PORT_APP:
563 result = 0x1;
564 break;
565 case HSO_PORT_PCSC:
566 result = 0x2;
567 break;
568 case HSO_PORT_GPS:
569 result = 0x3;
570 break;
571 case HSO_PORT_APP2:
572 result = 0x4;
573 break;
574 default:
575 result = 0x0;
576 }
577 return result;
578}
579
580static struct hso_serial *get_serial_by_shared_int_and_type(
581 struct hso_shared_int *shared_int,
582 int mux)
583{
584 int i, port;
585
586 port = hso_mux_to_port(mux);
587
588 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
589 if (serial_table[i] &&
590 (dev2ser(serial_table[i])->shared_int == shared_int) &&
591 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
592 return dev2ser(serial_table[i]);
593 }
594 }
595
596 return NULL;
597}
598
599static struct hso_serial *get_serial_by_index(unsigned index)
600{
601 struct hso_serial *serial = NULL;
602 unsigned long flags;
603
604 spin_lock_irqsave(&serial_table_lock, flags);
605 if (serial_table[index])
606 serial = dev2ser(serial_table[index]);
607 spin_unlock_irqrestore(&serial_table_lock, flags);
608
609 return serial;
610}
611
612static int obtain_minor(struct hso_serial *serial)
613{
614 int index;
615 unsigned long flags;
616
617 spin_lock_irqsave(&serial_table_lock, flags);
618 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
619 if (serial_table[index] == NULL) {
620 serial_table[index] = serial->parent;
621 serial->minor = index;
622 spin_unlock_irqrestore(&serial_table_lock, flags);
623 return 0;
624 }
625 }
626 spin_unlock_irqrestore(&serial_table_lock, flags);
627
628 pr_err("%s: no free serial devices in table\n", __func__);
629 return -1;
630}
631
632static void release_minor(struct hso_serial *serial)
633{
634 unsigned long flags;
635
636 spin_lock_irqsave(&serial_table_lock, flags);
637 serial_table[serial->minor] = NULL;
638 spin_unlock_irqrestore(&serial_table_lock, flags);
639}
640
641static void handle_usb_error(int status, const char *function,
642 struct hso_device *hso_dev)
643{
644 char *explanation;
645
646 switch (status) {
647 case -ENODEV:
648 explanation = "no device";
649 break;
650 case -ENOENT:
651 explanation = "endpoint not enabled";
652 break;
653 case -EPIPE:
654 explanation = "endpoint stalled";
655 break;
656 case -ENOSPC:
657 explanation = "not enough bandwidth";
658 break;
659 case -ESHUTDOWN:
660 explanation = "device disabled";
661 break;
662 case -EHOSTUNREACH:
663 explanation = "device suspended";
664 break;
665 case -EINVAL:
666 case -EAGAIN:
667 case -EFBIG:
668 case -EMSGSIZE:
669 explanation = "internal error";
670 break;
671 case -EILSEQ:
672 case -EPROTO:
673 case -ETIME:
674 case -ETIMEDOUT:
675 explanation = "protocol error";
676 if (hso_dev)
677 usb_queue_reset_device(hso_dev->interface);
678 break;
679 default:
680 explanation = "unknown status";
681 break;
682 }
683
684 /* log a meaningful explanation of an USB status */
685 hso_dbg(0x1, "%s: received USB status - %s (%d)\n",
686 function, explanation, status);
687}
688
689/* Network interface functions */
690
691/* called when net interface is brought up by ifconfig */
692static int hso_net_open(struct net_device *net)
693{
694 struct hso_net *odev = netdev_priv(net);
695 unsigned long flags = 0;
696
697 if (!odev) {
698 dev_err(&net->dev, "No net device !\n");
699 return -ENODEV;
700 }
701
702 odev->skb_tx_buf = NULL;
703
704 /* setup environment */
705 spin_lock_irqsave(&odev->net_lock, flags);
706 odev->rx_parse_state = WAIT_IP;
707 odev->rx_buf_size = 0;
708 odev->rx_buf_missing = sizeof(struct iphdr);
709 spin_unlock_irqrestore(&odev->net_lock, flags);
710
711 /* We are up and running. */
712 set_bit(HSO_NET_RUNNING, &odev->flags);
713 hso_start_net_device(odev->parent);
714
715 /* Tell the kernel we are ready to start receiving from it */
716 netif_start_queue(net);
717
718 return 0;
719}
720
721/* called when interface is brought down by ifconfig */
722static int hso_net_close(struct net_device *net)
723{
724 struct hso_net *odev = netdev_priv(net);
725
726 /* we don't need the queue anymore */
727 netif_stop_queue(net);
728 /* no longer running */
729 clear_bit(HSO_NET_RUNNING, &odev->flags);
730
731 hso_stop_net_device(odev->parent);
732
733 /* done */
734 return 0;
735}
736
737/* USB tells is xmit done, we should start the netqueue again */
738static void write_bulk_callback(struct urb *urb)
739{
740 struct hso_net *odev = urb->context;
741 int status = urb->status;
742
743 /* Sanity check */
744 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
745 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
746 return;
747 }
748
749 /* Do we still have a valid kernel network device? */
750 if (!netif_device_present(odev->net)) {
751 dev_err(&urb->dev->dev, "%s: net device not present\n",
752 __func__);
753 return;
754 }
755
756 /* log status, but don't act on it, we don't need to resubmit anything
757 * anyhow */
758 if (status)
759 handle_usb_error(status, __func__, odev->parent);
760
761 hso_put_activity(odev->parent);
762
763 /* Tell the network interface we are ready for another frame */
764 netif_wake_queue(odev->net);
765}
766
767/* called by kernel when we need to transmit a packet */
768static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
769 struct net_device *net)
770{
771 struct hso_net *odev = netdev_priv(net);
772 int result;
773
774 /* Tell the kernel, "No more frames 'til we are done with this one." */
775 netif_stop_queue(net);
776 if (hso_get_activity(odev->parent) == -EAGAIN) {
777 odev->skb_tx_buf = skb;
778 return NETDEV_TX_OK;
779 }
780
781 /* log if asked */
782 DUMP1(skb->data, skb->len);
783 /* Copy it from kernel memory to OUR memory */
784 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
785 hso_dbg(0x1, "len: %d/%d\n", skb->len, MUX_BULK_TX_BUF_SIZE);
786
787 /* Fill in the URB for shipping it out. */
788 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
789 odev->parent->usb,
790 usb_sndbulkpipe(odev->parent->usb,
791 odev->out_endp->
792 bEndpointAddress & 0x7F),
793 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
794 odev);
795
796 /* Deal with the Zero Length packet problem, I hope */
797 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
798
799 /* Send the URB on its merry way. */
800 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
801 if (result) {
802 dev_warn(&odev->parent->interface->dev,
803 "failed mux_bulk_tx_urb %d\n", result);
804 net->stats.tx_errors++;
805 netif_start_queue(net);
806 } else {
807 net->stats.tx_packets++;
808 net->stats.tx_bytes += skb->len;
809 }
810 dev_kfree_skb(skb);
811 /* we're done */
812 return NETDEV_TX_OK;
813}
814
815static const struct ethtool_ops ops = {
816 .get_link = ethtool_op_get_link
817};
818
819/* called when a packet did not ack after watchdogtimeout */
820static void hso_net_tx_timeout(struct net_device *net, unsigned int txqueue)
821{
822 struct hso_net *odev = netdev_priv(net);
823
824 if (!odev)
825 return;
826
827 /* Tell syslog we are hosed. */
828 dev_warn(&net->dev, "Tx timed out.\n");
829
830 /* Tear the waiting frame off the list */
831 if (odev->mux_bulk_tx_urb)
832 usb_unlink_urb(odev->mux_bulk_tx_urb);
833
834 /* Update statistics */
835 net->stats.tx_errors++;
836}
837
838/* make a real packet from the received USB buffer */
839static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
840 unsigned int count, unsigned char is_eop)
841{
842 unsigned short temp_bytes;
843 unsigned short buffer_offset = 0;
844 unsigned short frame_len;
845
846 /* log if needed */
847 hso_dbg(0x1, "Rx %d bytes\n", count);
848 DUMP(ip_pkt, min(128, (int)count));
849
850 while (count) {
851 switch (odev->rx_parse_state) {
852 case WAIT_IP:
853 /* waiting for IP header. */
854 /* wanted bytes - size of ip header */
855 temp_bytes =
856 (count <
857 odev->rx_buf_missing) ? count : odev->
858 rx_buf_missing;
859
860 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
861 odev->rx_buf_size, ip_pkt + buffer_offset,
862 temp_bytes);
863
864 odev->rx_buf_size += temp_bytes;
865 buffer_offset += temp_bytes;
866 odev->rx_buf_missing -= temp_bytes;
867 count -= temp_bytes;
868
869 if (!odev->rx_buf_missing) {
870 /* header is complete allocate an sk_buffer and
871 * continue to WAIT_DATA */
872 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
873
874 if ((frame_len > DEFAULT_MRU) ||
875 (frame_len < sizeof(struct iphdr))) {
876 dev_err(&odev->net->dev,
877 "Invalid frame (%d) length\n",
878 frame_len);
879 odev->rx_parse_state = WAIT_SYNC;
880 continue;
881 }
882 /* Allocate an sk_buff */
883 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
884 frame_len);
885 if (!odev->skb_rx_buf) {
886 /* We got no receive buffer. */
887 hso_dbg(0x1, "could not allocate memory\n");
888 odev->rx_parse_state = WAIT_SYNC;
889 continue;
890 }
891
892 /* Copy what we got so far. make room for iphdr
893 * after tail. */
894 skb_put_data(odev->skb_rx_buf,
895 (char *)&(odev->rx_ip_hdr),
896 sizeof(struct iphdr));
897
898 /* ETH_HLEN */
899 odev->rx_buf_size = sizeof(struct iphdr);
900
901 /* Filip actually use .tot_len */
902 odev->rx_buf_missing =
903 frame_len - sizeof(struct iphdr);
904 odev->rx_parse_state = WAIT_DATA;
905 }
906 break;
907
908 case WAIT_DATA:
909 temp_bytes = (count < odev->rx_buf_missing)
910 ? count : odev->rx_buf_missing;
911
912 /* Copy the rest of the bytes that are left in the
913 * buffer into the waiting sk_buf. */
914 /* Make room for temp_bytes after tail. */
915 skb_put_data(odev->skb_rx_buf,
916 ip_pkt + buffer_offset,
917 temp_bytes);
918
919 odev->rx_buf_missing -= temp_bytes;
920 count -= temp_bytes;
921 buffer_offset += temp_bytes;
922 odev->rx_buf_size += temp_bytes;
923 if (!odev->rx_buf_missing) {
924 /* Packet is complete. Inject into stack. */
925 /* We have IP packet here */
926 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
927 skb_reset_mac_header(odev->skb_rx_buf);
928
929 /* Ship it off to the kernel */
930 netif_rx(odev->skb_rx_buf);
931 /* No longer our buffer. */
932 odev->skb_rx_buf = NULL;
933
934 /* update out statistics */
935 odev->net->stats.rx_packets++;
936
937 odev->net->stats.rx_bytes += odev->rx_buf_size;
938
939 odev->rx_buf_size = 0;
940 odev->rx_buf_missing = sizeof(struct iphdr);
941 odev->rx_parse_state = WAIT_IP;
942 }
943 break;
944
945 case WAIT_SYNC:
946 hso_dbg(0x1, " W_S\n");
947 count = 0;
948 break;
949 default:
950 hso_dbg(0x1, "\n");
951 count--;
952 break;
953 }
954 }
955
956 /* Recovery mechanism for WAIT_SYNC state. */
957 if (is_eop) {
958 if (odev->rx_parse_state == WAIT_SYNC) {
959 odev->rx_parse_state = WAIT_IP;
960 odev->rx_buf_size = 0;
961 odev->rx_buf_missing = sizeof(struct iphdr);
962 }
963 }
964}
965
966static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
967{
968 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
969 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
970
971 if (((rest == 5) || (rest == 6)) &&
972 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
973 crc_check, 4)) {
974 urb->actual_length -= 4;
975 }
976}
977
978/* Moving data from usb to kernel (in interrupt state) */
979static void read_bulk_callback(struct urb *urb)
980{
981 struct hso_net *odev = urb->context;
982 struct net_device *net;
983 int result;
984 unsigned long flags;
985 int status = urb->status;
986
987 /* is al ok? (Filip: Who's Al ?) */
988 if (status) {
989 handle_usb_error(status, __func__, odev->parent);
990 return;
991 }
992
993 /* Sanity check */
994 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
995 hso_dbg(0x1, "BULK IN callback but driver is not active!\n");
996 return;
997 }
998 usb_mark_last_busy(urb->dev);
999
1000 net = odev->net;
1001
1002 if (!netif_device_present(net)) {
1003 /* Somebody killed our network interface... */
1004 return;
1005 }
1006
1007 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1008 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1009
1010 /* do we even have a packet? */
1011 if (urb->actual_length) {
1012 /* Handle the IP stream, add header and push it onto network
1013 * stack if the packet is complete. */
1014 spin_lock_irqsave(&odev->net_lock, flags);
1015 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1016 (urb->transfer_buffer_length >
1017 urb->actual_length) ? 1 : 0);
1018 spin_unlock_irqrestore(&odev->net_lock, flags);
1019 }
1020
1021 /* We are done with this URB, resubmit it. Prep the USB to wait for
1022 * another frame. Reuse same as received. */
1023 usb_fill_bulk_urb(urb,
1024 odev->parent->usb,
1025 usb_rcvbulkpipe(odev->parent->usb,
1026 odev->in_endp->
1027 bEndpointAddress & 0x7F),
1028 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1029 read_bulk_callback, odev);
1030
1031 /* Give this to the USB subsystem so it can tell us when more data
1032 * arrives. */
1033 result = usb_submit_urb(urb, GFP_ATOMIC);
1034 if (result)
1035 dev_warn(&odev->parent->interface->dev,
1036 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1037 result);
1038}
1039
1040/* Serial driver functions */
1041
1042static void hso_init_termios(struct ktermios *termios)
1043{
1044 /*
1045 * The default requirements for this device are:
1046 */
1047 termios->c_iflag &=
1048 ~(IGNBRK /* disable ignore break */
1049 | BRKINT /* disable break causes interrupt */
1050 | PARMRK /* disable mark parity errors */
1051 | ISTRIP /* disable clear high bit of input characters */
1052 | INLCR /* disable translate NL to CR */
1053 | IGNCR /* disable ignore CR */
1054 | ICRNL /* disable translate CR to NL */
1055 | IXON); /* disable enable XON/XOFF flow control */
1056
1057 /* disable postprocess output characters */
1058 termios->c_oflag &= ~OPOST;
1059
1060 termios->c_lflag &=
1061 ~(ECHO /* disable echo input characters */
1062 | ECHONL /* disable echo new line */
1063 | ICANON /* disable erase, kill, werase, and rprnt
1064 special characters */
1065 | ISIG /* disable interrupt, quit, and suspend special
1066 characters */
1067 | IEXTEN); /* disable non-POSIX special characters */
1068
1069 termios->c_cflag &=
1070 ~(CSIZE /* no size */
1071 | PARENB /* disable parity bit */
1072 | CBAUD /* clear current baud rate */
1073 | CBAUDEX); /* clear current buad rate */
1074
1075 termios->c_cflag |= CS8; /* character size 8 bits */
1076
1077 /* baud rate 115200 */
1078 tty_termios_encode_baud_rate(termios, 115200, 115200);
1079}
1080
1081static void _hso_serial_set_termios(struct tty_struct *tty)
1082{
1083 struct hso_serial *serial = tty->driver_data;
1084
1085 if (!serial) {
1086 pr_err("%s: no tty structures", __func__);
1087 return;
1088 }
1089
1090 hso_dbg(0x8, "port %d\n", serial->minor);
1091
1092 /*
1093 * Fix up unsupported bits
1094 */
1095 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1096
1097 tty->termios.c_cflag &=
1098 ~(CSIZE /* no size */
1099 | PARENB /* disable parity bit */
1100 | CBAUD /* clear current baud rate */
1101 | CBAUDEX); /* clear current buad rate */
1102
1103 tty->termios.c_cflag |= CS8; /* character size 8 bits */
1104
1105 /* baud rate 115200 */
1106 tty_encode_baud_rate(tty, 115200, 115200);
1107}
1108
1109static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1110{
1111 int result;
1112 /* We are done with this URB, resubmit it. Prep the USB to wait for
1113 * another frame */
1114 usb_fill_bulk_urb(urb, serial->parent->usb,
1115 usb_rcvbulkpipe(serial->parent->usb,
1116 serial->in_endp->
1117 bEndpointAddress & 0x7F),
1118 urb->transfer_buffer, serial->rx_data_length,
1119 hso_std_serial_read_bulk_callback, serial);
1120 /* Give this to the USB subsystem so it can tell us when more data
1121 * arrives. */
1122 result = usb_submit_urb(urb, GFP_ATOMIC);
1123 if (result) {
1124 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1125 __func__, result);
1126 }
1127}
1128
1129
1130
1131
1132static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1133{
1134 int count;
1135 struct urb *curr_urb;
1136
1137 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1138 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1139 count = put_rxbuf_data(curr_urb, serial);
1140 if (count == -1)
1141 return;
1142 if (count == 0) {
1143 serial->curr_rx_urb_idx++;
1144 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1145 serial->curr_rx_urb_idx = 0;
1146 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1147 }
1148 }
1149}
1150
1151static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1152{
1153 int count = 0;
1154 struct urb *urb;
1155
1156 urb = serial->rx_urb[0];
1157 if (serial->port.count > 0) {
1158 count = put_rxbuf_data(urb, serial);
1159 if (count == -1)
1160 return;
1161 }
1162 /* Re issue a read as long as we receive data. */
1163
1164 if (count == 0 && ((urb->actual_length != 0) ||
1165 (serial->rx_state == RX_PENDING))) {
1166 serial->rx_state = RX_SENT;
1167 hso_mux_serial_read(serial);
1168 } else
1169 serial->rx_state = RX_IDLE;
1170}
1171
1172
1173/* read callback for Diag and CS port */
1174static void hso_std_serial_read_bulk_callback(struct urb *urb)
1175{
1176 struct hso_serial *serial = urb->context;
1177 int status = urb->status;
1178 unsigned long flags;
1179
1180 hso_dbg(0x8, "--- Got serial_read_bulk callback %02x ---\n", status);
1181
1182 /* sanity check */
1183 if (!serial) {
1184 hso_dbg(0x1, "serial == NULL\n");
1185 return;
1186 }
1187 if (status) {
1188 handle_usb_error(status, __func__, serial->parent);
1189 return;
1190 }
1191
1192 hso_dbg(0x1, "Actual length = %d\n", urb->actual_length);
1193 DUMP1(urb->transfer_buffer, urb->actual_length);
1194
1195 /* Anyone listening? */
1196 if (serial->port.count == 0)
1197 return;
1198
1199 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1200 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1201 /* Valid data, handle RX data */
1202 spin_lock_irqsave(&serial->serial_lock, flags);
1203 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1204 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1205 spin_unlock_irqrestore(&serial->serial_lock, flags);
1206}
1207
1208/*
1209 * This needs to be a tasklet otherwise we will
1210 * end up recursively calling this function.
1211 */
1212static void hso_unthrottle_tasklet(struct tasklet_struct *t)
1213{
1214 struct hso_serial *serial = from_tasklet(serial, t,
1215 unthrottle_tasklet);
1216 unsigned long flags;
1217
1218 spin_lock_irqsave(&serial->serial_lock, flags);
1219 if ((serial->parent->port_spec & HSO_INTF_MUX))
1220 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1221 else
1222 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1223 spin_unlock_irqrestore(&serial->serial_lock, flags);
1224}
1225
1226static void hso_unthrottle(struct tty_struct *tty)
1227{
1228 struct hso_serial *serial = tty->driver_data;
1229
1230 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1231}
1232
1233/* open the requested serial port */
1234static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1235{
1236 struct hso_serial *serial = get_serial_by_index(tty->index);
1237 int result;
1238
1239 /* sanity check */
1240 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1241 WARN_ON(1);
1242 tty->driver_data = NULL;
1243 hso_dbg(0x1, "Failed to open port\n");
1244 return -ENODEV;
1245 }
1246
1247 mutex_lock(&serial->parent->mutex);
1248 result = usb_autopm_get_interface(serial->parent->interface);
1249 if (result < 0)
1250 goto err_out;
1251
1252 hso_dbg(0x1, "Opening %d\n", serial->minor);
1253
1254 /* setup */
1255 tty->driver_data = serial;
1256 tty_port_tty_set(&serial->port, tty);
1257
1258 /* check for port already opened, if not set the termios */
1259 serial->port.count++;
1260 if (serial->port.count == 1) {
1261 serial->rx_state = RX_IDLE;
1262 /* Force default termio settings */
1263 _hso_serial_set_termios(tty);
1264 tasklet_setup(&serial->unthrottle_tasklet,
1265 hso_unthrottle_tasklet);
1266 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1267 if (result) {
1268 hso_stop_serial_device(serial->parent);
1269 serial->port.count--;
1270 } else {
1271 kref_get(&serial->parent->ref);
1272 }
1273 } else {
1274 hso_dbg(0x1, "Port was already open\n");
1275 }
1276
1277 usb_autopm_put_interface(serial->parent->interface);
1278
1279 /* done */
1280 if (result)
1281 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1282err_out:
1283 mutex_unlock(&serial->parent->mutex);
1284 return result;
1285}
1286
1287/* close the requested serial port */
1288static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1289{
1290 struct hso_serial *serial = tty->driver_data;
1291 u8 usb_gone;
1292
1293 hso_dbg(0x1, "Closing serial port\n");
1294
1295 /* Open failed, no close cleanup required */
1296 if (serial == NULL)
1297 return;
1298
1299 mutex_lock(&serial->parent->mutex);
1300 usb_gone = serial->parent->usb_gone;
1301
1302 if (!usb_gone)
1303 usb_autopm_get_interface(serial->parent->interface);
1304
1305 /* reset the rts and dtr */
1306 /* do the actual close */
1307 serial->port.count--;
1308
1309 if (serial->port.count <= 0) {
1310 serial->port.count = 0;
1311 tty_port_tty_set(&serial->port, NULL);
1312 if (!usb_gone)
1313 hso_stop_serial_device(serial->parent);
1314 tasklet_kill(&serial->unthrottle_tasklet);
1315 }
1316
1317 if (!usb_gone)
1318 usb_autopm_put_interface(serial->parent->interface);
1319
1320 mutex_unlock(&serial->parent->mutex);
1321}
1322
1323/* close the requested serial port */
1324static ssize_t hso_serial_write(struct tty_struct *tty, const u8 *buf,
1325 size_t count)
1326{
1327 struct hso_serial *serial = tty->driver_data;
1328 unsigned long flags;
1329
1330 /* sanity check */
1331 if (serial == NULL) {
1332 pr_err("%s: serial is NULL\n", __func__);
1333 return -ENODEV;
1334 }
1335
1336 spin_lock_irqsave(&serial->serial_lock, flags);
1337
1338 count = min_t(size_t, serial->tx_data_length - serial->tx_buffer_count,
1339 count);
1340 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, count);
1341 serial->tx_buffer_count += count;
1342
1343 spin_unlock_irqrestore(&serial->serial_lock, flags);
1344
1345 hso_kick_transmit(serial);
1346 /* done */
1347 return count;
1348}
1349
1350/* how much room is there for writing */
1351static unsigned int hso_serial_write_room(struct tty_struct *tty)
1352{
1353 struct hso_serial *serial = tty->driver_data;
1354 unsigned int room;
1355 unsigned long flags;
1356
1357 spin_lock_irqsave(&serial->serial_lock, flags);
1358 room = serial->tx_data_length - serial->tx_buffer_count;
1359 spin_unlock_irqrestore(&serial->serial_lock, flags);
1360
1361 /* return free room */
1362 return room;
1363}
1364
1365static void hso_serial_cleanup(struct tty_struct *tty)
1366{
1367 struct hso_serial *serial = tty->driver_data;
1368
1369 if (!serial)
1370 return;
1371
1372 kref_put(&serial->parent->ref, hso_serial_ref_free);
1373}
1374
1375/* setup the term */
1376static void hso_serial_set_termios(struct tty_struct *tty,
1377 const struct ktermios *old)
1378{
1379 struct hso_serial *serial = tty->driver_data;
1380 unsigned long flags;
1381
1382 if (old)
1383 hso_dbg(0x16, "Termios called with: cflags new[%u] - old[%u]\n",
1384 (unsigned int)tty->termios.c_cflag,
1385 (unsigned int)old->c_cflag);
1386
1387 /* the actual setup */
1388 spin_lock_irqsave(&serial->serial_lock, flags);
1389 if (serial->port.count)
1390 _hso_serial_set_termios(tty);
1391 else
1392 tty->termios = *old;
1393 spin_unlock_irqrestore(&serial->serial_lock, flags);
1394
1395 /* done */
1396}
1397
1398/* how many characters in the buffer */
1399static unsigned int hso_serial_chars_in_buffer(struct tty_struct *tty)
1400{
1401 struct hso_serial *serial = tty->driver_data;
1402 unsigned long flags;
1403 unsigned int chars;
1404
1405 /* sanity check */
1406 if (serial == NULL)
1407 return 0;
1408
1409 spin_lock_irqsave(&serial->serial_lock, flags);
1410 chars = serial->tx_buffer_count;
1411 spin_unlock_irqrestore(&serial->serial_lock, flags);
1412
1413 return chars;
1414}
1415static int tiocmget_submit_urb(struct hso_serial *serial,
1416 struct hso_tiocmget *tiocmget,
1417 struct usb_device *usb)
1418{
1419 int result;
1420
1421 if (serial->parent->usb_gone)
1422 return -ENODEV;
1423 usb_fill_int_urb(tiocmget->urb, usb,
1424 usb_rcvintpipe(usb,
1425 tiocmget->endp->
1426 bEndpointAddress & 0x7F),
1427 tiocmget->serial_state_notification,
1428 sizeof(struct hso_serial_state_notification),
1429 tiocmget_intr_callback, serial,
1430 tiocmget->endp->bInterval);
1431 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1432 if (result) {
1433 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1434 result);
1435 }
1436 return result;
1437
1438}
1439
1440static void tiocmget_intr_callback(struct urb *urb)
1441{
1442 struct hso_serial *serial = urb->context;
1443 struct hso_tiocmget *tiocmget;
1444 int status = urb->status;
1445 u16 UART_state_bitmap, prev_UART_state_bitmap;
1446 struct uart_icount *icount;
1447 struct hso_serial_state_notification *serial_state_notification;
1448 struct usb_device *usb;
1449 struct usb_interface *interface;
1450 int if_num;
1451
1452 /* Sanity checks */
1453 if (!serial)
1454 return;
1455 if (status) {
1456 handle_usb_error(status, __func__, serial->parent);
1457 return;
1458 }
1459
1460 /* tiocmget is only supported on HSO_PORT_MODEM */
1461 tiocmget = serial->tiocmget;
1462 if (!tiocmget)
1463 return;
1464 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
1465
1466 usb = serial->parent->usb;
1467 interface = serial->parent->interface;
1468
1469 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1470
1471 /* wIndex should be the USB interface number of the port to which the
1472 * notification applies, which should always be the Modem port.
1473 */
1474 serial_state_notification = tiocmget->serial_state_notification;
1475 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1476 serial_state_notification->bNotification != B_NOTIFICATION ||
1477 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1478 le16_to_cpu(serial_state_notification->wIndex) != if_num ||
1479 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1480 dev_warn(&usb->dev,
1481 "hso received invalid serial state notification\n");
1482 DUMP(serial_state_notification,
1483 sizeof(struct hso_serial_state_notification));
1484 } else {
1485 unsigned long flags;
1486
1487 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1488 UART_state_bitmap);
1489 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1490 icount = &tiocmget->icount;
1491 spin_lock_irqsave(&serial->serial_lock, flags);
1492 if ((UART_state_bitmap & B_OVERRUN) !=
1493 (prev_UART_state_bitmap & B_OVERRUN))
1494 icount->parity++;
1495 if ((UART_state_bitmap & B_PARITY) !=
1496 (prev_UART_state_bitmap & B_PARITY))
1497 icount->parity++;
1498 if ((UART_state_bitmap & B_FRAMING) !=
1499 (prev_UART_state_bitmap & B_FRAMING))
1500 icount->frame++;
1501 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1502 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1503 icount->rng++;
1504 if ((UART_state_bitmap & B_BREAK) !=
1505 (prev_UART_state_bitmap & B_BREAK))
1506 icount->brk++;
1507 if ((UART_state_bitmap & B_TX_CARRIER) !=
1508 (prev_UART_state_bitmap & B_TX_CARRIER))
1509 icount->dsr++;
1510 if ((UART_state_bitmap & B_RX_CARRIER) !=
1511 (prev_UART_state_bitmap & B_RX_CARRIER))
1512 icount->dcd++;
1513 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1514 spin_unlock_irqrestore(&serial->serial_lock, flags);
1515 tiocmget->intr_completed = 1;
1516 wake_up_interruptible(&tiocmget->waitq);
1517 }
1518 memset(serial_state_notification, 0,
1519 sizeof(struct hso_serial_state_notification));
1520 tiocmget_submit_urb(serial,
1521 tiocmget,
1522 serial->parent->usb);
1523}
1524
1525/*
1526 * next few functions largely stolen from drivers/serial/serial_core.c
1527 */
1528/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1529 * - mask passed in arg for lines of interest
1530 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1531 * Caller should use TIOCGICOUNT to see which one it was
1532 */
1533static int
1534hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1535{
1536 DECLARE_WAITQUEUE(wait, current);
1537 struct uart_icount cprev, cnow;
1538 struct hso_tiocmget *tiocmget;
1539 int ret;
1540
1541 tiocmget = serial->tiocmget;
1542 if (!tiocmget)
1543 return -ENOENT;
1544 /*
1545 * note the counters on entry
1546 */
1547 spin_lock_irq(&serial->serial_lock);
1548 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1549 spin_unlock_irq(&serial->serial_lock);
1550 add_wait_queue(&tiocmget->waitq, &wait);
1551 for (;;) {
1552 spin_lock_irq(&serial->serial_lock);
1553 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1554 spin_unlock_irq(&serial->serial_lock);
1555 set_current_state(TASK_INTERRUPTIBLE);
1556 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1557 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1558 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1559 ret = 0;
1560 break;
1561 }
1562 schedule();
1563 /* see if a signal did it */
1564 if (signal_pending(current)) {
1565 ret = -ERESTARTSYS;
1566 break;
1567 }
1568 cprev = cnow;
1569 }
1570 __set_current_state(TASK_RUNNING);
1571 remove_wait_queue(&tiocmget->waitq, &wait);
1572
1573 return ret;
1574}
1575
1576/*
1577 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1578 * Return: write counters to the user passed counter struct
1579 * NB: both 1->0 and 0->1 transitions are counted except for
1580 * RI where only 0->1 is counted.
1581 */
1582static int hso_get_count(struct tty_struct *tty,
1583 struct serial_icounter_struct *icount)
1584{
1585 struct uart_icount cnow;
1586 struct hso_serial *serial = tty->driver_data;
1587 struct hso_tiocmget *tiocmget = serial->tiocmget;
1588
1589 memset(icount, 0, sizeof(struct serial_icounter_struct));
1590
1591 if (!tiocmget)
1592 return -ENOENT;
1593 spin_lock_irq(&serial->serial_lock);
1594 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1595 spin_unlock_irq(&serial->serial_lock);
1596
1597 icount->cts = cnow.cts;
1598 icount->dsr = cnow.dsr;
1599 icount->rng = cnow.rng;
1600 icount->dcd = cnow.dcd;
1601 icount->rx = cnow.rx;
1602 icount->tx = cnow.tx;
1603 icount->frame = cnow.frame;
1604 icount->overrun = cnow.overrun;
1605 icount->parity = cnow.parity;
1606 icount->brk = cnow.brk;
1607 icount->buf_overrun = cnow.buf_overrun;
1608
1609 return 0;
1610}
1611
1612
1613static int hso_serial_tiocmget(struct tty_struct *tty)
1614{
1615 int retval;
1616 struct hso_serial *serial = tty->driver_data;
1617 struct hso_tiocmget *tiocmget;
1618 u16 UART_state_bitmap;
1619
1620 /* sanity check */
1621 if (!serial) {
1622 hso_dbg(0x1, "no tty structures\n");
1623 return -EINVAL;
1624 }
1625 spin_lock_irq(&serial->serial_lock);
1626 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1627 ((serial->dtr_state) ? TIOCM_DTR : 0);
1628 tiocmget = serial->tiocmget;
1629 if (tiocmget) {
1630
1631 UART_state_bitmap = le16_to_cpu(
1632 tiocmget->prev_UART_state_bitmap);
1633 if (UART_state_bitmap & B_RING_SIGNAL)
1634 retval |= TIOCM_RNG;
1635 if (UART_state_bitmap & B_RX_CARRIER)
1636 retval |= TIOCM_CD;
1637 if (UART_state_bitmap & B_TX_CARRIER)
1638 retval |= TIOCM_DSR;
1639 }
1640 spin_unlock_irq(&serial->serial_lock);
1641 return retval;
1642}
1643
1644static int hso_serial_tiocmset(struct tty_struct *tty,
1645 unsigned int set, unsigned int clear)
1646{
1647 int val = 0;
1648 unsigned long flags;
1649 int if_num;
1650 struct hso_serial *serial = tty->driver_data;
1651 struct usb_interface *interface;
1652
1653 /* sanity check */
1654 if (!serial) {
1655 hso_dbg(0x1, "no tty structures\n");
1656 return -EINVAL;
1657 }
1658
1659 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1660 return -EINVAL;
1661
1662 interface = serial->parent->interface;
1663 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1664
1665 spin_lock_irqsave(&serial->serial_lock, flags);
1666 if (set & TIOCM_RTS)
1667 serial->rts_state = 1;
1668 if (set & TIOCM_DTR)
1669 serial->dtr_state = 1;
1670
1671 if (clear & TIOCM_RTS)
1672 serial->rts_state = 0;
1673 if (clear & TIOCM_DTR)
1674 serial->dtr_state = 0;
1675
1676 if (serial->dtr_state)
1677 val |= 0x01;
1678 if (serial->rts_state)
1679 val |= 0x02;
1680
1681 spin_unlock_irqrestore(&serial->serial_lock, flags);
1682
1683 return usb_control_msg(serial->parent->usb,
1684 usb_sndctrlpipe(serial->parent->usb, 0), 0x22,
1685 0x21, val, if_num, NULL, 0,
1686 USB_CTRL_SET_TIMEOUT);
1687}
1688
1689static int hso_serial_ioctl(struct tty_struct *tty,
1690 unsigned int cmd, unsigned long arg)
1691{
1692 struct hso_serial *serial = tty->driver_data;
1693 int ret = 0;
1694 hso_dbg(0x8, "IOCTL cmd: %d, arg: %ld\n", cmd, arg);
1695
1696 if (!serial)
1697 return -ENODEV;
1698 switch (cmd) {
1699 case TIOCMIWAIT:
1700 ret = hso_wait_modem_status(serial, arg);
1701 break;
1702 default:
1703 ret = -ENOIOCTLCMD;
1704 break;
1705 }
1706 return ret;
1707}
1708
1709
1710/* starts a transmit */
1711static void hso_kick_transmit(struct hso_serial *serial)
1712{
1713 unsigned long flags;
1714 int res;
1715
1716 spin_lock_irqsave(&serial->serial_lock, flags);
1717 if (!serial->tx_buffer_count)
1718 goto out;
1719
1720 if (serial->tx_urb_used)
1721 goto out;
1722
1723 /* Wakeup USB interface if necessary */
1724 if (hso_get_activity(serial->parent) == -EAGAIN)
1725 goto out;
1726
1727 /* Switch pointers around to avoid memcpy */
1728 swap(serial->tx_buffer, serial->tx_data);
1729 serial->tx_data_count = serial->tx_buffer_count;
1730 serial->tx_buffer_count = 0;
1731
1732 /* If serial->tx_data is set, it means we switched buffers */
1733 if (serial->tx_data && serial->write_data) {
1734 res = serial->write_data(serial);
1735 if (res >= 0)
1736 serial->tx_urb_used = 1;
1737 }
1738out:
1739 spin_unlock_irqrestore(&serial->serial_lock, flags);
1740}
1741
1742/* make a request (for reading and writing data to muxed serial port) */
1743static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1744 struct urb *ctrl_urb,
1745 struct usb_ctrlrequest *ctrl_req,
1746 u8 *ctrl_urb_data, u32 size)
1747{
1748 int result;
1749 int pipe;
1750
1751 /* Sanity check */
1752 if (!serial || !ctrl_urb || !ctrl_req) {
1753 pr_err("%s: Wrong arguments\n", __func__);
1754 return -EINVAL;
1755 }
1756
1757 /* initialize */
1758 ctrl_req->wValue = 0;
1759 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1760 ctrl_req->wLength = cpu_to_le16(size);
1761
1762 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1763 /* Reading command */
1764 ctrl_req->bRequestType = USB_DIR_IN |
1765 USB_TYPE_OPTION_VENDOR |
1766 USB_RECIP_INTERFACE;
1767 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1768 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1769 } else {
1770 /* Writing command */
1771 ctrl_req->bRequestType = USB_DIR_OUT |
1772 USB_TYPE_OPTION_VENDOR |
1773 USB_RECIP_INTERFACE;
1774 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1775 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1776 }
1777 /* syslog */
1778 hso_dbg(0x2, "%s command (%02x) len: %d, port: %d\n",
1779 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1780 ctrl_req->bRequestType, ctrl_req->wLength, port);
1781
1782 /* Load ctrl urb */
1783 ctrl_urb->transfer_flags = 0;
1784 usb_fill_control_urb(ctrl_urb,
1785 serial->parent->usb,
1786 pipe,
1787 (u8 *) ctrl_req,
1788 ctrl_urb_data, size, ctrl_callback, serial);
1789 /* Send it on merry way */
1790 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1791 if (result) {
1792 dev_err(&ctrl_urb->dev->dev,
1793 "%s failed submit ctrl_urb %d type %d\n", __func__,
1794 result, type);
1795 return result;
1796 }
1797
1798 /* done */
1799 return size;
1800}
1801
1802/* called by intr_callback when read occurs */
1803static int hso_mux_serial_read(struct hso_serial *serial)
1804{
1805 if (!serial)
1806 return -EINVAL;
1807
1808 /* clean data */
1809 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1810 /* make the request */
1811
1812 if (serial->num_rx_urbs != 1) {
1813 dev_err(&serial->parent->interface->dev,
1814 "ERROR: mux'd reads with multiple buffers "
1815 "not possible\n");
1816 return 0;
1817 }
1818 return mux_device_request(serial,
1819 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1820 serial->parent->port_spec & HSO_PORT_MASK,
1821 serial->rx_urb[0],
1822 &serial->ctrl_req_rx,
1823 serial->rx_data[0], serial->rx_data_length);
1824}
1825
1826/* used for muxed serial port callback (muxed serial read) */
1827static void intr_callback(struct urb *urb)
1828{
1829 struct hso_shared_int *shared_int = urb->context;
1830 struct hso_serial *serial;
1831 unsigned char *port_req;
1832 int status = urb->status;
1833 unsigned long flags;
1834 int i;
1835
1836 usb_mark_last_busy(urb->dev);
1837
1838 /* sanity check */
1839 if (!shared_int)
1840 return;
1841
1842 /* status check */
1843 if (status) {
1844 handle_usb_error(status, __func__, NULL);
1845 return;
1846 }
1847 hso_dbg(0x8, "--- Got intr callback 0x%02X ---\n", status);
1848
1849 /* what request? */
1850 port_req = urb->transfer_buffer;
1851 hso_dbg(0x8, "port_req = 0x%.2X\n", *port_req);
1852 /* loop over all muxed ports to find the one sending this */
1853 for (i = 0; i < 8; i++) {
1854 /* max 8 channels on MUX */
1855 if (*port_req & (1 << i)) {
1856 serial = get_serial_by_shared_int_and_type(shared_int,
1857 (1 << i));
1858 if (serial != NULL) {
1859 hso_dbg(0x1, "Pending read interrupt on port %d\n",
1860 i);
1861 spin_lock_irqsave(&serial->serial_lock, flags);
1862 if (serial->rx_state == RX_IDLE &&
1863 serial->port.count > 0) {
1864 /* Setup and send a ctrl req read on
1865 * port i */
1866 if (!serial->rx_urb_filled[0]) {
1867 serial->rx_state = RX_SENT;
1868 hso_mux_serial_read(serial);
1869 } else
1870 serial->rx_state = RX_PENDING;
1871 } else {
1872 hso_dbg(0x1, "Already a read pending on port %d or port not open\n",
1873 i);
1874 }
1875 spin_unlock_irqrestore(&serial->serial_lock,
1876 flags);
1877 }
1878 }
1879 }
1880 /* Resubmit interrupt urb */
1881 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1882}
1883
1884/* called for writing to muxed serial port */
1885static int hso_mux_serial_write_data(struct hso_serial *serial)
1886{
1887 if (NULL == serial)
1888 return -EINVAL;
1889
1890 return mux_device_request(serial,
1891 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1892 serial->parent->port_spec & HSO_PORT_MASK,
1893 serial->tx_urb,
1894 &serial->ctrl_req_tx,
1895 serial->tx_data, serial->tx_data_count);
1896}
1897
1898/* write callback for Diag and CS port */
1899static void hso_std_serial_write_bulk_callback(struct urb *urb)
1900{
1901 struct hso_serial *serial = urb->context;
1902 int status = urb->status;
1903 unsigned long flags;
1904
1905 /* sanity check */
1906 if (!serial) {
1907 hso_dbg(0x1, "serial == NULL\n");
1908 return;
1909 }
1910
1911 spin_lock_irqsave(&serial->serial_lock, flags);
1912 serial->tx_urb_used = 0;
1913 spin_unlock_irqrestore(&serial->serial_lock, flags);
1914 if (status) {
1915 handle_usb_error(status, __func__, serial->parent);
1916 return;
1917 }
1918 hso_put_activity(serial->parent);
1919 tty_port_tty_wakeup(&serial->port);
1920 hso_kick_transmit(serial);
1921
1922 hso_dbg(0x1, "\n");
1923}
1924
1925/* called for writing diag or CS serial port */
1926static int hso_std_serial_write_data(struct hso_serial *serial)
1927{
1928 int count = serial->tx_data_count;
1929 int result;
1930
1931 usb_fill_bulk_urb(serial->tx_urb,
1932 serial->parent->usb,
1933 usb_sndbulkpipe(serial->parent->usb,
1934 serial->out_endp->
1935 bEndpointAddress & 0x7F),
1936 serial->tx_data, serial->tx_data_count,
1937 hso_std_serial_write_bulk_callback, serial);
1938
1939 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1940 if (result) {
1941 dev_warn(&serial->parent->usb->dev,
1942 "Failed to submit urb - res %d\n", result);
1943 return result;
1944 }
1945
1946 return count;
1947}
1948
1949/* callback after read or write on muxed serial port */
1950static void ctrl_callback(struct urb *urb)
1951{
1952 struct hso_serial *serial = urb->context;
1953 struct usb_ctrlrequest *req;
1954 int status = urb->status;
1955 unsigned long flags;
1956
1957 /* sanity check */
1958 if (!serial)
1959 return;
1960
1961 spin_lock_irqsave(&serial->serial_lock, flags);
1962 serial->tx_urb_used = 0;
1963 spin_unlock_irqrestore(&serial->serial_lock, flags);
1964 if (status) {
1965 handle_usb_error(status, __func__, serial->parent);
1966 return;
1967 }
1968
1969 /* what request? */
1970 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1971 hso_dbg(0x8, "--- Got muxed ctrl callback 0x%02X ---\n", status);
1972 hso_dbg(0x8, "Actual length of urb = %d\n", urb->actual_length);
1973 DUMP1(urb->transfer_buffer, urb->actual_length);
1974
1975 if (req->bRequestType ==
1976 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
1977 /* response to a read command */
1978 serial->rx_urb_filled[0] = 1;
1979 spin_lock_irqsave(&serial->serial_lock, flags);
1980 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1981 spin_unlock_irqrestore(&serial->serial_lock, flags);
1982 } else {
1983 hso_put_activity(serial->parent);
1984 tty_port_tty_wakeup(&serial->port);
1985 /* response to a write command */
1986 hso_kick_transmit(serial);
1987 }
1988}
1989
1990/* handle RX data for serial port */
1991static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
1992{
1993 struct tty_struct *tty;
1994 int count;
1995
1996 /* Sanity check */
1997 if (urb == NULL || serial == NULL) {
1998 hso_dbg(0x1, "serial = NULL\n");
1999 return -2;
2000 }
2001
2002 tty = tty_port_tty_get(&serial->port);
2003
2004 if (tty && tty_throttled(tty)) {
2005 tty_kref_put(tty);
2006 return -1;
2007 }
2008
2009 /* Push data to tty */
2010 hso_dbg(0x1, "data to push to tty\n");
2011 count = tty_buffer_request_room(&serial->port, urb->actual_length);
2012 if (count >= urb->actual_length) {
2013 tty_insert_flip_string(&serial->port, urb->transfer_buffer,
2014 urb->actual_length);
2015 tty_flip_buffer_push(&serial->port);
2016 } else {
2017 dev_warn(&serial->parent->usb->dev,
2018 "dropping data, %d bytes lost\n", urb->actual_length);
2019 }
2020
2021 tty_kref_put(tty);
2022
2023 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2024
2025 return 0;
2026}
2027
2028
2029/* Base driver functions */
2030
2031static void hso_log_port(struct hso_device *hso_dev)
2032{
2033 char *port_type;
2034 char port_dev[20];
2035
2036 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2037 case HSO_PORT_CONTROL:
2038 port_type = "Control";
2039 break;
2040 case HSO_PORT_APP:
2041 port_type = "Application";
2042 break;
2043 case HSO_PORT_GPS:
2044 port_type = "GPS";
2045 break;
2046 case HSO_PORT_GPS_CONTROL:
2047 port_type = "GPS control";
2048 break;
2049 case HSO_PORT_APP2:
2050 port_type = "Application2";
2051 break;
2052 case HSO_PORT_PCSC:
2053 port_type = "PCSC";
2054 break;
2055 case HSO_PORT_DIAG:
2056 port_type = "Diagnostic";
2057 break;
2058 case HSO_PORT_DIAG2:
2059 port_type = "Diagnostic2";
2060 break;
2061 case HSO_PORT_MODEM:
2062 port_type = "Modem";
2063 break;
2064 case HSO_PORT_NETWORK:
2065 port_type = "Network";
2066 break;
2067 default:
2068 port_type = "Unknown";
2069 break;
2070 }
2071 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2072 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2073 } else
2074 sprintf(port_dev, "/dev/%s%d", tty_filename,
2075 dev2ser(hso_dev)->minor);
2076
2077 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2078 port_type, port_dev);
2079}
2080
2081static int hso_start_net_device(struct hso_device *hso_dev)
2082{
2083 int i, result = 0;
2084 struct hso_net *hso_net = dev2net(hso_dev);
2085
2086 if (!hso_net)
2087 return -ENODEV;
2088
2089 /* send URBs for all read buffers */
2090 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2091
2092 /* Prep a receive URB */
2093 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2094 hso_dev->usb,
2095 usb_rcvbulkpipe(hso_dev->usb,
2096 hso_net->in_endp->
2097 bEndpointAddress & 0x7F),
2098 hso_net->mux_bulk_rx_buf_pool[i],
2099 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2100 hso_net);
2101
2102 /* Put it out there so the device can send us stuff */
2103 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2104 GFP_NOIO);
2105 if (result)
2106 dev_warn(&hso_dev->usb->dev,
2107 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2108 i, result);
2109 }
2110
2111 return result;
2112}
2113
2114static int hso_stop_net_device(struct hso_device *hso_dev)
2115{
2116 int i;
2117 struct hso_net *hso_net = dev2net(hso_dev);
2118
2119 if (!hso_net)
2120 return -ENODEV;
2121
2122 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2123 if (hso_net->mux_bulk_rx_urb_pool[i])
2124 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2125
2126 }
2127 if (hso_net->mux_bulk_tx_urb)
2128 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2129
2130 return 0;
2131}
2132
2133static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2134{
2135 int i, result = 0;
2136 struct hso_serial *serial = dev2ser(hso_dev);
2137
2138 if (!serial)
2139 return -ENODEV;
2140
2141 /* If it is not the MUX port fill in and submit a bulk urb (already
2142 * allocated in hso_serial_start) */
2143 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2144 for (i = 0; i < serial->num_rx_urbs; i++) {
2145 usb_fill_bulk_urb(serial->rx_urb[i],
2146 serial->parent->usb,
2147 usb_rcvbulkpipe(serial->parent->usb,
2148 serial->in_endp->
2149 bEndpointAddress &
2150 0x7F),
2151 serial->rx_data[i],
2152 serial->rx_data_length,
2153 hso_std_serial_read_bulk_callback,
2154 serial);
2155 result = usb_submit_urb(serial->rx_urb[i], flags);
2156 if (result) {
2157 dev_warn(&serial->parent->usb->dev,
2158 "Failed to submit urb - res %d\n",
2159 result);
2160 break;
2161 }
2162 }
2163 } else {
2164 mutex_lock(&serial->shared_int->shared_int_lock);
2165 if (!serial->shared_int->use_count) {
2166 result =
2167 hso_mux_submit_intr_urb(serial->shared_int,
2168 hso_dev->usb, flags);
2169 }
2170 serial->shared_int->use_count++;
2171 mutex_unlock(&serial->shared_int->shared_int_lock);
2172 }
2173 if (serial->tiocmget)
2174 tiocmget_submit_urb(serial,
2175 serial->tiocmget,
2176 serial->parent->usb);
2177 return result;
2178}
2179
2180static int hso_stop_serial_device(struct hso_device *hso_dev)
2181{
2182 int i;
2183 struct hso_serial *serial = dev2ser(hso_dev);
2184 struct hso_tiocmget *tiocmget;
2185
2186 if (!serial)
2187 return -ENODEV;
2188
2189 for (i = 0; i < serial->num_rx_urbs; i++) {
2190 if (serial->rx_urb[i]) {
2191 usb_kill_urb(serial->rx_urb[i]);
2192 serial->rx_urb_filled[i] = 0;
2193 }
2194 }
2195 serial->curr_rx_urb_idx = 0;
2196
2197 if (serial->tx_urb)
2198 usb_kill_urb(serial->tx_urb);
2199
2200 if (serial->shared_int) {
2201 mutex_lock(&serial->shared_int->shared_int_lock);
2202 if (serial->shared_int->use_count &&
2203 (--serial->shared_int->use_count == 0)) {
2204 struct urb *urb;
2205
2206 urb = serial->shared_int->shared_intr_urb;
2207 if (urb)
2208 usb_kill_urb(urb);
2209 }
2210 mutex_unlock(&serial->shared_int->shared_int_lock);
2211 }
2212 tiocmget = serial->tiocmget;
2213 if (tiocmget) {
2214 wake_up_interruptible(&tiocmget->waitq);
2215 usb_kill_urb(tiocmget->urb);
2216 }
2217
2218 return 0;
2219}
2220
2221static void hso_serial_tty_unregister(struct hso_serial *serial)
2222{
2223 tty_unregister_device(tty_drv, serial->minor);
2224 release_minor(serial);
2225}
2226
2227static void hso_serial_common_free(struct hso_serial *serial)
2228{
2229 int i;
2230
2231 for (i = 0; i < serial->num_rx_urbs; i++) {
2232 /* unlink and free RX URB */
2233 usb_free_urb(serial->rx_urb[i]);
2234 /* free the RX buffer */
2235 kfree(serial->rx_data[i]);
2236 }
2237
2238 /* unlink and free TX URB */
2239 usb_free_urb(serial->tx_urb);
2240 kfree(serial->tx_buffer);
2241 kfree(serial->tx_data);
2242 tty_port_destroy(&serial->port);
2243}
2244
2245static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2246 int rx_size, int tx_size)
2247{
2248 int i;
2249
2250 tty_port_init(&serial->port);
2251
2252 if (obtain_minor(serial))
2253 goto exit2;
2254
2255 /* register our minor number */
2256 serial->parent->dev = tty_port_register_device_attr(&serial->port,
2257 tty_drv, serial->minor, &serial->parent->interface->dev,
2258 serial->parent, hso_serial_dev_groups);
2259 if (IS_ERR(serial->parent->dev)) {
2260 release_minor(serial);
2261 goto exit2;
2262 }
2263
2264 serial->magic = HSO_SERIAL_MAGIC;
2265 spin_lock_init(&serial->serial_lock);
2266 serial->num_rx_urbs = num_urbs;
2267
2268 /* RX, allocate urb and initialize */
2269
2270 /* prepare our RX buffer */
2271 serial->rx_data_length = rx_size;
2272 for (i = 0; i < serial->num_rx_urbs; i++) {
2273 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2274 if (!serial->rx_urb[i])
2275 goto exit;
2276 serial->rx_urb[i]->transfer_buffer = NULL;
2277 serial->rx_urb[i]->transfer_buffer_length = 0;
2278 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2279 GFP_KERNEL);
2280 if (!serial->rx_data[i])
2281 goto exit;
2282 }
2283
2284 /* TX, allocate urb and initialize */
2285 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2286 if (!serial->tx_urb)
2287 goto exit;
2288 serial->tx_urb->transfer_buffer = NULL;
2289 serial->tx_urb->transfer_buffer_length = 0;
2290 /* prepare our TX buffer */
2291 serial->tx_data_count = 0;
2292 serial->tx_buffer_count = 0;
2293 serial->tx_data_length = tx_size;
2294 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2295 if (!serial->tx_data)
2296 goto exit;
2297
2298 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2299 if (!serial->tx_buffer)
2300 goto exit;
2301
2302 return 0;
2303exit:
2304 hso_serial_tty_unregister(serial);
2305exit2:
2306 hso_serial_common_free(serial);
2307 return -1;
2308}
2309
2310/* Creates a general hso device */
2311static struct hso_device *hso_create_device(struct usb_interface *intf,
2312 int port_spec)
2313{
2314 struct hso_device *hso_dev;
2315
2316 hso_dev = kzalloc(sizeof(*hso_dev), GFP_KERNEL);
2317 if (!hso_dev)
2318 return NULL;
2319
2320 hso_dev->port_spec = port_spec;
2321 hso_dev->usb = interface_to_usbdev(intf);
2322 hso_dev->interface = intf;
2323 kref_init(&hso_dev->ref);
2324 mutex_init(&hso_dev->mutex);
2325
2326 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2327 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2328
2329 return hso_dev;
2330}
2331
2332/* Removes a network device in the network device table */
2333static int remove_net_device(struct hso_device *hso_dev)
2334{
2335 int i;
2336
2337 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2338 if (network_table[i] == hso_dev) {
2339 network_table[i] = NULL;
2340 break;
2341 }
2342 }
2343 if (i == HSO_MAX_NET_DEVICES)
2344 return -1;
2345 return 0;
2346}
2347
2348/* Frees our network device */
2349static void hso_free_net_device(struct hso_device *hso_dev)
2350{
2351 int i;
2352 struct hso_net *hso_net = dev2net(hso_dev);
2353
2354 if (!hso_net)
2355 return;
2356
2357 remove_net_device(hso_net->parent);
2358
2359 if (hso_net->net)
2360 unregister_netdev(hso_net->net);
2361
2362 /* start freeing */
2363 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2364 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2365 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2366 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2367 }
2368 usb_free_urb(hso_net->mux_bulk_tx_urb);
2369 kfree(hso_net->mux_bulk_tx_buf);
2370 hso_net->mux_bulk_tx_buf = NULL;
2371
2372 if (hso_net->net)
2373 free_netdev(hso_net->net);
2374
2375 kfree(hso_dev);
2376}
2377
2378static const struct net_device_ops hso_netdev_ops = {
2379 .ndo_open = hso_net_open,
2380 .ndo_stop = hso_net_close,
2381 .ndo_start_xmit = hso_net_start_xmit,
2382 .ndo_tx_timeout = hso_net_tx_timeout,
2383};
2384
2385/* initialize the network interface */
2386static void hso_net_init(struct net_device *net)
2387{
2388 struct hso_net *hso_net = netdev_priv(net);
2389
2390 hso_dbg(0x1, "sizeof hso_net is %zu\n", sizeof(*hso_net));
2391
2392 /* fill in the other fields */
2393 net->netdev_ops = &hso_netdev_ops;
2394 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2395 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2396 net->type = ARPHRD_NONE;
2397 net->mtu = DEFAULT_MTU - 14;
2398 net->tx_queue_len = 10;
2399 net->ethtool_ops = &ops;
2400
2401 /* and initialize the semaphore */
2402 spin_lock_init(&hso_net->net_lock);
2403}
2404
2405/* Adds a network device in the network device table */
2406static int add_net_device(struct hso_device *hso_dev)
2407{
2408 int i;
2409
2410 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2411 if (network_table[i] == NULL) {
2412 network_table[i] = hso_dev;
2413 break;
2414 }
2415 }
2416 if (i == HSO_MAX_NET_DEVICES)
2417 return -1;
2418 return 0;
2419}
2420
2421static int hso_rfkill_set_block(void *data, bool blocked)
2422{
2423 struct hso_device *hso_dev = data;
2424 int enabled = !blocked;
2425 int rv;
2426
2427 mutex_lock(&hso_dev->mutex);
2428 if (hso_dev->usb_gone)
2429 rv = 0;
2430 else
2431 rv = usb_control_msg(hso_dev->usb, usb_sndctrlpipe(hso_dev->usb, 0),
2432 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2433 USB_CTRL_SET_TIMEOUT);
2434 mutex_unlock(&hso_dev->mutex);
2435 return rv;
2436}
2437
2438static const struct rfkill_ops hso_rfkill_ops = {
2439 .set_block = hso_rfkill_set_block,
2440};
2441
2442/* Creates and sets up everything for rfkill */
2443static void hso_create_rfkill(struct hso_device *hso_dev,
2444 struct usb_interface *interface)
2445{
2446 struct hso_net *hso_net = dev2net(hso_dev);
2447 struct device *dev = &hso_net->net->dev;
2448 static u32 rfkill_counter;
2449
2450 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d",
2451 rfkill_counter++);
2452
2453 hso_net->rfkill = rfkill_alloc(hso_net->name,
2454 &interface_to_usbdev(interface)->dev,
2455 RFKILL_TYPE_WWAN,
2456 &hso_rfkill_ops, hso_dev);
2457 if (!hso_net->rfkill)
2458 return;
2459
2460 if (rfkill_register(hso_net->rfkill) < 0) {
2461 rfkill_destroy(hso_net->rfkill);
2462 hso_net->rfkill = NULL;
2463 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2464 return;
2465 }
2466}
2467
2468static struct device_type hso_type = {
2469 .name = "wwan",
2470};
2471
2472/* Creates our network device */
2473static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2474 int port_spec)
2475{
2476 int result, i;
2477 struct net_device *net;
2478 struct hso_net *hso_net;
2479 struct hso_device *hso_dev;
2480
2481 hso_dev = hso_create_device(interface, port_spec);
2482 if (!hso_dev)
2483 return NULL;
2484
2485 /* allocate our network device, then we can put in our private data */
2486 /* call hso_net_init to do the basic initialization */
2487 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN,
2488 hso_net_init);
2489 if (!net) {
2490 dev_err(&interface->dev, "Unable to create ethernet device\n");
2491 goto err_hso_dev;
2492 }
2493
2494 hso_net = netdev_priv(net);
2495
2496 hso_dev->port_data.dev_net = hso_net;
2497 hso_net->net = net;
2498 hso_net->parent = hso_dev;
2499
2500 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2501 USB_DIR_IN);
2502 if (!hso_net->in_endp) {
2503 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2504 goto err_net;
2505 }
2506 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2507 USB_DIR_OUT);
2508 if (!hso_net->out_endp) {
2509 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2510 goto err_net;
2511 }
2512 SET_NETDEV_DEV(net, &interface->dev);
2513 SET_NETDEV_DEVTYPE(net, &hso_type);
2514
2515 /* start allocating */
2516 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2517 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2518 if (!hso_net->mux_bulk_rx_urb_pool[i])
2519 goto err_mux_bulk_rx;
2520 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2521 GFP_KERNEL);
2522 if (!hso_net->mux_bulk_rx_buf_pool[i])
2523 goto err_mux_bulk_rx;
2524 }
2525 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2526 if (!hso_net->mux_bulk_tx_urb)
2527 goto err_mux_bulk_rx;
2528 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2529 if (!hso_net->mux_bulk_tx_buf)
2530 goto err_free_tx_urb;
2531
2532 result = add_net_device(hso_dev);
2533 if (result) {
2534 dev_err(&interface->dev, "Failed to add net device\n");
2535 goto err_free_tx_buf;
2536 }
2537
2538 /* registering our net device */
2539 result = register_netdev(net);
2540 if (result) {
2541 dev_err(&interface->dev, "Failed to register device\n");
2542 goto err_rmv_ndev;
2543 }
2544
2545 hso_log_port(hso_dev);
2546
2547 hso_create_rfkill(hso_dev, interface);
2548
2549 return hso_dev;
2550
2551err_rmv_ndev:
2552 remove_net_device(hso_dev);
2553err_free_tx_buf:
2554 kfree(hso_net->mux_bulk_tx_buf);
2555err_free_tx_urb:
2556 usb_free_urb(hso_net->mux_bulk_tx_urb);
2557err_mux_bulk_rx:
2558 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2559 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2560 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2561 }
2562err_net:
2563 free_netdev(net);
2564err_hso_dev:
2565 kfree(hso_dev);
2566 return NULL;
2567}
2568
2569static void hso_free_tiomget(struct hso_serial *serial)
2570{
2571 struct hso_tiocmget *tiocmget;
2572 if (!serial)
2573 return;
2574 tiocmget = serial->tiocmget;
2575 if (tiocmget) {
2576 usb_free_urb(tiocmget->urb);
2577 tiocmget->urb = NULL;
2578 serial->tiocmget = NULL;
2579 kfree(tiocmget->serial_state_notification);
2580 tiocmget->serial_state_notification = NULL;
2581 kfree(tiocmget);
2582 }
2583}
2584
2585/* Frees an AT channel ( goes for both mux and non-mux ) */
2586static void hso_free_serial_device(struct hso_device *hso_dev)
2587{
2588 struct hso_serial *serial = dev2ser(hso_dev);
2589
2590 if (!serial)
2591 return;
2592
2593 hso_serial_common_free(serial);
2594
2595 if (serial->shared_int) {
2596 mutex_lock(&serial->shared_int->shared_int_lock);
2597 if (--serial->shared_int->ref_count == 0)
2598 hso_free_shared_int(serial->shared_int);
2599 else
2600 mutex_unlock(&serial->shared_int->shared_int_lock);
2601 }
2602 hso_free_tiomget(serial);
2603 kfree(serial);
2604 kfree(hso_dev);
2605}
2606
2607/* Creates a bulk AT channel */
2608static struct hso_device *hso_create_bulk_serial_device(
2609 struct usb_interface *interface, int port)
2610{
2611 struct hso_device *hso_dev;
2612 struct hso_serial *serial;
2613 int num_urbs;
2614 struct hso_tiocmget *tiocmget;
2615
2616 hso_dev = hso_create_device(interface, port);
2617 if (!hso_dev)
2618 return NULL;
2619
2620 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2621 if (!serial)
2622 goto exit;
2623
2624 serial->parent = hso_dev;
2625 hso_dev->port_data.dev_serial = serial;
2626
2627 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2628 num_urbs = 2;
2629 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2630 GFP_KERNEL);
2631 if (!serial->tiocmget)
2632 goto exit;
2633 serial->tiocmget->serial_state_notification
2634 = kzalloc(sizeof(struct hso_serial_state_notification),
2635 GFP_KERNEL);
2636 if (!serial->tiocmget->serial_state_notification)
2637 goto exit;
2638 tiocmget = serial->tiocmget;
2639 tiocmget->endp = hso_get_ep(interface,
2640 USB_ENDPOINT_XFER_INT,
2641 USB_DIR_IN);
2642 if (!tiocmget->endp) {
2643 dev_err(&interface->dev, "Failed to find INT IN ep\n");
2644 goto exit;
2645 }
2646
2647 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2648 if (!tiocmget->urb)
2649 goto exit;
2650
2651 mutex_init(&tiocmget->mutex);
2652 init_waitqueue_head(&tiocmget->waitq);
2653 } else {
2654 num_urbs = 1;
2655 }
2656
2657 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2658 BULK_URB_TX_SIZE))
2659 goto exit;
2660
2661 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2662 USB_DIR_IN);
2663 if (!serial->in_endp) {
2664 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2665 goto exit2;
2666 }
2667
2668 if (!
2669 (serial->out_endp =
2670 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2671 dev_err(&interface->dev, "Failed to find BULK OUT ep\n");
2672 goto exit2;
2673 }
2674
2675 serial->write_data = hso_std_serial_write_data;
2676
2677 /* setup the proc dirs and files if needed */
2678 hso_log_port(hso_dev);
2679
2680 /* done, return it */
2681 return hso_dev;
2682
2683exit2:
2684 hso_serial_tty_unregister(serial);
2685 hso_serial_common_free(serial);
2686exit:
2687 hso_free_tiomget(serial);
2688 kfree(serial);
2689 kfree(hso_dev);
2690 return NULL;
2691}
2692
2693/* Creates a multiplexed AT channel */
2694static
2695struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2696 int port,
2697 struct hso_shared_int *mux)
2698{
2699 struct hso_device *hso_dev;
2700 struct hso_serial *serial;
2701 int port_spec;
2702
2703 port_spec = HSO_INTF_MUX;
2704 port_spec &= ~HSO_PORT_MASK;
2705
2706 port_spec |= hso_mux_to_port(port);
2707 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2708 return NULL;
2709
2710 hso_dev = hso_create_device(interface, port_spec);
2711 if (!hso_dev)
2712 return NULL;
2713
2714 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2715 if (!serial)
2716 goto err_free_dev;
2717
2718 hso_dev->port_data.dev_serial = serial;
2719 serial->parent = hso_dev;
2720
2721 if (hso_serial_common_create
2722 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2723 goto err_free_serial;
2724
2725 serial->tx_data_length--;
2726 serial->write_data = hso_mux_serial_write_data;
2727
2728 serial->shared_int = mux;
2729 mutex_lock(&serial->shared_int->shared_int_lock);
2730 serial->shared_int->ref_count++;
2731 mutex_unlock(&serial->shared_int->shared_int_lock);
2732
2733 /* setup the proc dirs and files if needed */
2734 hso_log_port(hso_dev);
2735
2736 /* done, return it */
2737 return hso_dev;
2738
2739err_free_serial:
2740 kfree(serial);
2741err_free_dev:
2742 kfree(hso_dev);
2743 return NULL;
2744
2745}
2746
2747static void hso_free_shared_int(struct hso_shared_int *mux)
2748{
2749 usb_free_urb(mux->shared_intr_urb);
2750 kfree(mux->shared_intr_buf);
2751 mutex_unlock(&mux->shared_int_lock);
2752 kfree(mux);
2753}
2754
2755static
2756struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2757{
2758 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2759
2760 if (!mux)
2761 return NULL;
2762
2763 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2764 USB_DIR_IN);
2765 if (!mux->intr_endp) {
2766 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2767 goto exit;
2768 }
2769
2770 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2771 if (!mux->shared_intr_urb)
2772 goto exit;
2773 mux->shared_intr_buf =
2774 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2775 GFP_KERNEL);
2776 if (!mux->shared_intr_buf)
2777 goto exit;
2778
2779 mutex_init(&mux->shared_int_lock);
2780
2781 return mux;
2782
2783exit:
2784 kfree(mux->shared_intr_buf);
2785 usb_free_urb(mux->shared_intr_urb);
2786 kfree(mux);
2787 return NULL;
2788}
2789
2790/* Gets the port spec for a certain interface */
2791static int hso_get_config_data(struct usb_interface *interface)
2792{
2793 struct usb_device *usbdev = interface_to_usbdev(interface);
2794 u8 *config_data = kmalloc(17, GFP_KERNEL);
2795 u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2796 s32 result;
2797
2798 if (!config_data)
2799 return -ENOMEM;
2800 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2801 0x86, 0xC0, 0, 0, config_data, 17,
2802 USB_CTRL_SET_TIMEOUT) != 0x11) {
2803 kfree(config_data);
2804 return -EIO;
2805 }
2806
2807 /* check if we have a valid interface */
2808 if (if_num > 16) {
2809 kfree(config_data);
2810 return -EINVAL;
2811 }
2812
2813 switch (config_data[if_num]) {
2814 case 0x0:
2815 result = 0;
2816 break;
2817 case 0x1:
2818 result = HSO_PORT_DIAG;
2819 break;
2820 case 0x2:
2821 result = HSO_PORT_GPS;
2822 break;
2823 case 0x3:
2824 result = HSO_PORT_GPS_CONTROL;
2825 break;
2826 case 0x4:
2827 result = HSO_PORT_APP;
2828 break;
2829 case 0x5:
2830 result = HSO_PORT_APP2;
2831 break;
2832 case 0x6:
2833 result = HSO_PORT_CONTROL;
2834 break;
2835 case 0x7:
2836 result = HSO_PORT_NETWORK;
2837 break;
2838 case 0x8:
2839 result = HSO_PORT_MODEM;
2840 break;
2841 case 0x9:
2842 result = HSO_PORT_MSD;
2843 break;
2844 case 0xa:
2845 result = HSO_PORT_PCSC;
2846 break;
2847 case 0xb:
2848 result = HSO_PORT_VOICE;
2849 break;
2850 default:
2851 result = 0;
2852 }
2853
2854 if (result)
2855 result |= HSO_INTF_BULK;
2856
2857 if (config_data[16] & 0x1)
2858 result |= HSO_INFO_CRC_BUG;
2859
2860 kfree(config_data);
2861 return result;
2862}
2863
2864/* called once for each interface upon device insertion */
2865static int hso_probe(struct usb_interface *interface,
2866 const struct usb_device_id *id)
2867{
2868 int mux, i, if_num, port_spec;
2869 unsigned char port_mask;
2870 struct hso_device *hso_dev = NULL;
2871 struct hso_shared_int *shared_int;
2872 struct hso_device *tmp_dev = NULL;
2873
2874 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2875 dev_err(&interface->dev, "Not our interface\n");
2876 return -ENODEV;
2877 }
2878
2879 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2880
2881 /* Get the interface/port specification from either driver_info or from
2882 * the device itself */
2883 if (id->driver_info) {
2884 /* if_num is controlled by the device, driver_info is a 0 terminated
2885 * array. Make sure, the access is in bounds! */
2886 for (i = 0; i <= if_num; ++i)
2887 if (((u32 *)(id->driver_info))[i] == 0)
2888 goto exit;
2889 port_spec = ((u32 *)(id->driver_info))[if_num];
2890 } else {
2891 port_spec = hso_get_config_data(interface);
2892 if (port_spec < 0)
2893 goto exit;
2894 }
2895
2896 /* Check if we need to switch to alt interfaces prior to port
2897 * configuration */
2898 if (interface->num_altsetting > 1)
2899 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2900 interface->needs_remote_wakeup = 1;
2901
2902 /* Allocate new hso device(s) */
2903 switch (port_spec & HSO_INTF_MASK) {
2904 case HSO_INTF_MUX:
2905 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2906 /* Create the network device */
2907 if (!disable_net) {
2908 hso_dev = hso_create_net_device(interface,
2909 port_spec);
2910 if (!hso_dev)
2911 goto exit;
2912 tmp_dev = hso_dev;
2913 }
2914 }
2915
2916 if (hso_get_mux_ports(interface, &port_mask))
2917 /* TODO: de-allocate everything */
2918 goto exit;
2919
2920 shared_int = hso_create_shared_int(interface);
2921 if (!shared_int)
2922 goto exit;
2923
2924 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2925 if (port_mask & i) {
2926 hso_dev = hso_create_mux_serial_device(
2927 interface, i, shared_int);
2928 if (!hso_dev)
2929 goto exit;
2930 }
2931 }
2932
2933 if (tmp_dev)
2934 hso_dev = tmp_dev;
2935 break;
2936
2937 case HSO_INTF_BULK:
2938 /* It's a regular bulk interface */
2939 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2940 if (!disable_net)
2941 hso_dev =
2942 hso_create_net_device(interface, port_spec);
2943 } else {
2944 hso_dev =
2945 hso_create_bulk_serial_device(interface, port_spec);
2946 }
2947 if (!hso_dev)
2948 goto exit;
2949 break;
2950 default:
2951 goto exit;
2952 }
2953
2954 /* save our data pointer in this device */
2955 usb_set_intfdata(interface, hso_dev);
2956
2957 /* done */
2958 return 0;
2959exit:
2960 hso_free_interface(interface);
2961 return -ENODEV;
2962}
2963
2964/* device removed, cleaning up */
2965static void hso_disconnect(struct usb_interface *interface)
2966{
2967 hso_free_interface(interface);
2968
2969 /* remove reference of our private data */
2970 usb_set_intfdata(interface, NULL);
2971}
2972
2973static void async_get_intf(struct work_struct *data)
2974{
2975 struct hso_device *hso_dev =
2976 container_of(data, struct hso_device, async_get_intf);
2977 usb_autopm_get_interface(hso_dev->interface);
2978}
2979
2980static void async_put_intf(struct work_struct *data)
2981{
2982 struct hso_device *hso_dev =
2983 container_of(data, struct hso_device, async_put_intf);
2984 usb_autopm_put_interface(hso_dev->interface);
2985}
2986
2987static int hso_get_activity(struct hso_device *hso_dev)
2988{
2989 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2990 if (!hso_dev->is_active) {
2991 hso_dev->is_active = 1;
2992 schedule_work(&hso_dev->async_get_intf);
2993 }
2994 }
2995
2996 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
2997 return -EAGAIN;
2998
2999 usb_mark_last_busy(hso_dev->usb);
3000
3001 return 0;
3002}
3003
3004static int hso_put_activity(struct hso_device *hso_dev)
3005{
3006 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3007 if (hso_dev->is_active) {
3008 hso_dev->is_active = 0;
3009 schedule_work(&hso_dev->async_put_intf);
3010 return -EAGAIN;
3011 }
3012 }
3013 hso_dev->is_active = 0;
3014 return 0;
3015}
3016
3017/* called by kernel when we need to suspend device */
3018static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3019{
3020 int i, result;
3021
3022 /* Stop all serial ports */
3023 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3024 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3025 result = hso_stop_serial_device(serial_table[i]);
3026 if (result)
3027 goto out;
3028 }
3029 }
3030
3031 /* Stop all network ports */
3032 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3033 if (network_table[i] &&
3034 (network_table[i]->interface == iface)) {
3035 result = hso_stop_net_device(network_table[i]);
3036 if (result)
3037 goto out;
3038 }
3039 }
3040
3041out:
3042 return 0;
3043}
3044
3045/* called by kernel when we need to resume device */
3046static int hso_resume(struct usb_interface *iface)
3047{
3048 int i, result = 0;
3049 struct hso_net *hso_net;
3050
3051 /* Start all serial ports */
3052 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3053 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3054 if (dev2ser(serial_table[i])->port.count) {
3055 result =
3056 hso_start_serial_device(serial_table[i], GFP_NOIO);
3057 hso_kick_transmit(dev2ser(serial_table[i]));
3058 if (result)
3059 goto out;
3060 }
3061 }
3062 }
3063
3064 /* Start all network ports */
3065 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3066 if (network_table[i] &&
3067 (network_table[i]->interface == iface)) {
3068 hso_net = dev2net(network_table[i]);
3069 if (hso_net->flags & IFF_UP) {
3070 /* First transmit any lingering data,
3071 then restart the device. */
3072 if (hso_net->skb_tx_buf) {
3073 dev_dbg(&iface->dev,
3074 "Transmitting"
3075 " lingering data\n");
3076 hso_net_start_xmit(hso_net->skb_tx_buf,
3077 hso_net->net);
3078 hso_net->skb_tx_buf = NULL;
3079 }
3080 result = hso_start_net_device(network_table[i]);
3081 if (result)
3082 goto out;
3083 }
3084 }
3085 }
3086
3087out:
3088 return result;
3089}
3090
3091static void hso_serial_ref_free(struct kref *ref)
3092{
3093 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3094
3095 hso_free_serial_device(hso_dev);
3096}
3097
3098static void hso_free_interface(struct usb_interface *interface)
3099{
3100 struct hso_serial *serial;
3101 int i;
3102
3103 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3104 if (serial_table[i] &&
3105 (serial_table[i]->interface == interface)) {
3106 serial = dev2ser(serial_table[i]);
3107 tty_port_tty_hangup(&serial->port, false);
3108 mutex_lock(&serial->parent->mutex);
3109 serial->parent->usb_gone = 1;
3110 mutex_unlock(&serial->parent->mutex);
3111 cancel_work_sync(&serial_table[i]->async_put_intf);
3112 cancel_work_sync(&serial_table[i]->async_get_intf);
3113 hso_serial_tty_unregister(serial);
3114 kref_put(&serial->parent->ref, hso_serial_ref_free);
3115 }
3116 }
3117
3118 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3119 if (network_table[i] &&
3120 (network_table[i]->interface == interface)) {
3121 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3122 /* hso_stop_net_device doesn't stop the net queue since
3123 * traffic needs to start it again when suspended */
3124 netif_stop_queue(dev2net(network_table[i])->net);
3125 hso_stop_net_device(network_table[i]);
3126 cancel_work_sync(&network_table[i]->async_put_intf);
3127 cancel_work_sync(&network_table[i]->async_get_intf);
3128 if (rfk) {
3129 rfkill_unregister(rfk);
3130 rfkill_destroy(rfk);
3131 }
3132 hso_free_net_device(network_table[i]);
3133 }
3134 }
3135}
3136
3137/* Helper functions */
3138
3139/* Get the endpoint ! */
3140static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3141 int type, int dir)
3142{
3143 int i;
3144 struct usb_host_interface *iface = intf->cur_altsetting;
3145 struct usb_endpoint_descriptor *endp;
3146
3147 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3148 endp = &iface->endpoint[i].desc;
3149 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3150 (usb_endpoint_type(endp) == type))
3151 return endp;
3152 }
3153
3154 return NULL;
3155}
3156
3157/* Get the byte that describes which ports are enabled */
3158static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3159{
3160 int i;
3161 struct usb_host_interface *iface = intf->cur_altsetting;
3162
3163 if (iface->extralen == 3) {
3164 *ports = iface->extra[2];
3165 return 0;
3166 }
3167
3168 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3169 if (iface->endpoint[i].extralen == 3) {
3170 *ports = iface->endpoint[i].extra[2];
3171 return 0;
3172 }
3173 }
3174
3175 return -1;
3176}
3177
3178/* interrupt urb needs to be submitted, used for serial read of muxed port */
3179static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3180 struct usb_device *usb, gfp_t gfp)
3181{
3182 int result;
3183
3184 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3185 usb_rcvintpipe(usb,
3186 shared_int->intr_endp->bEndpointAddress & 0x7F),
3187 shared_int->shared_intr_buf,
3188 1,
3189 intr_callback, shared_int,
3190 shared_int->intr_endp->bInterval);
3191
3192 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3193 if (result)
3194 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3195 result);
3196
3197 return result;
3198}
3199
3200/* operations setup of the serial interface */
3201static const struct tty_operations hso_serial_ops = {
3202 .open = hso_serial_open,
3203 .close = hso_serial_close,
3204 .write = hso_serial_write,
3205 .write_room = hso_serial_write_room,
3206 .cleanup = hso_serial_cleanup,
3207 .ioctl = hso_serial_ioctl,
3208 .set_termios = hso_serial_set_termios,
3209 .chars_in_buffer = hso_serial_chars_in_buffer,
3210 .tiocmget = hso_serial_tiocmget,
3211 .tiocmset = hso_serial_tiocmset,
3212 .get_icount = hso_get_count,
3213 .unthrottle = hso_unthrottle
3214};
3215
3216static struct usb_driver hso_driver = {
3217 .name = driver_name,
3218 .probe = hso_probe,
3219 .disconnect = hso_disconnect,
3220 .id_table = hso_ids,
3221 .suspend = hso_suspend,
3222 .resume = hso_resume,
3223 .reset_resume = hso_resume,
3224 .supports_autosuspend = 1,
3225 .disable_hub_initiated_lpm = 1,
3226};
3227
3228static int __init hso_init(void)
3229{
3230 int result;
3231
3232 /* allocate our driver using the proper amount of supported minors */
3233 tty_drv = tty_alloc_driver(HSO_SERIAL_TTY_MINORS, TTY_DRIVER_REAL_RAW |
3234 TTY_DRIVER_DYNAMIC_DEV);
3235 if (IS_ERR(tty_drv))
3236 return PTR_ERR(tty_drv);
3237
3238 /* fill in all needed values */
3239 tty_drv->driver_name = driver_name;
3240 tty_drv->name = tty_filename;
3241
3242 /* if major number is provided as parameter, use that one */
3243 if (tty_major)
3244 tty_drv->major = tty_major;
3245
3246 tty_drv->minor_start = 0;
3247 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3248 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3249 tty_drv->init_termios = tty_std_termios;
3250 hso_init_termios(&tty_drv->init_termios);
3251 tty_set_operations(tty_drv, &hso_serial_ops);
3252
3253 /* register the tty driver */
3254 result = tty_register_driver(tty_drv);
3255 if (result) {
3256 pr_err("%s - tty_register_driver failed(%d)\n",
3257 __func__, result);
3258 goto err_free_tty;
3259 }
3260
3261 /* register this module as an usb driver */
3262 result = usb_register(&hso_driver);
3263 if (result) {
3264 pr_err("Could not register hso driver - error: %d\n", result);
3265 goto err_unreg_tty;
3266 }
3267
3268 /* done */
3269 return 0;
3270err_unreg_tty:
3271 tty_unregister_driver(tty_drv);
3272err_free_tty:
3273 tty_driver_kref_put(tty_drv);
3274 return result;
3275}
3276
3277static void __exit hso_exit(void)
3278{
3279 tty_unregister_driver(tty_drv);
3280 /* deregister the usb driver */
3281 usb_deregister(&hso_driver);
3282 tty_driver_kref_put(tty_drv);
3283}
3284
3285/* Module definitions */
3286module_init(hso_init);
3287module_exit(hso_exit);
3288
3289MODULE_AUTHOR(MOD_AUTHOR);
3290MODULE_DESCRIPTION(MOD_DESCRIPTION);
3291MODULE_LICENSE("GPL");
3292
3293/* change the debug level (eg: insmod hso.ko debug=0x04) */
3294MODULE_PARM_DESC(debug, "debug level mask [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3295module_param(debug, int, 0644);
3296
3297/* set the major tty number (eg: insmod hso.ko tty_major=245) */
3298MODULE_PARM_DESC(tty_major, "Set the major tty number");
3299module_param(tty_major, int, 0644);
3300
3301/* disable network interface (eg: insmod hso.ko disable_net=1) */
3302MODULE_PARM_DESC(disable_net, "Disable the network interface");
3303module_param(disable_net, int, 0644);
1// SPDX-License-Identifier: GPL-2.0-only
2/******************************************************************************
3 *
4 * Driver for Option High Speed Mobile Devices.
5 *
6 * Copyright (C) 2008 Option International
7 * Filip Aben <f.aben@option.com>
8 * Denis Joseph Barrow <d.barow@option.com>
9 * Jan Dumon <j.dumon@option.com>
10 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
11 * <ajb@spheresystems.co.uk>
12 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
13 * Copyright (C) 2008 Novell, Inc.
14 *
15 *****************************************************************************/
16
17/******************************************************************************
18 *
19 * Description of the device:
20 *
21 * Interface 0: Contains the IP network interface on the bulk end points.
22 * The multiplexed serial ports are using the interrupt and
23 * control endpoints.
24 * Interrupt contains a bitmap telling which multiplexed
25 * serialport needs servicing.
26 *
27 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
28 * port is opened, as this have a huge impact on the network port
29 * throughput.
30 *
31 * Interface 2: Standard modem interface - circuit switched interface, this
32 * can be used to make a standard ppp connection however it
33 * should not be used in conjunction with the IP network interface
34 * enabled for USB performance reasons i.e. if using this set
35 * ideally disable_net=1.
36 *
37 *****************************************************************************/
38
39#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
40
41#include <linux/sched/signal.h>
42#include <linux/slab.h>
43#include <linux/init.h>
44#include <linux/delay.h>
45#include <linux/netdevice.h>
46#include <linux/module.h>
47#include <linux/ethtool.h>
48#include <linux/usb.h>
49#include <linux/tty.h>
50#include <linux/tty_driver.h>
51#include <linux/tty_flip.h>
52#include <linux/kmod.h>
53#include <linux/rfkill.h>
54#include <linux/ip.h>
55#include <linux/uaccess.h>
56#include <linux/usb/cdc.h>
57#include <net/arp.h>
58#include <asm/byteorder.h>
59#include <linux/serial_core.h>
60#include <linux/serial.h>
61
62
63#define MOD_AUTHOR "Option Wireless"
64#define MOD_DESCRIPTION "USB High Speed Option driver"
65
66#define HSO_MAX_NET_DEVICES 10
67#define HSO__MAX_MTU 2048
68#define DEFAULT_MTU 1500
69#define DEFAULT_MRU 1500
70
71#define CTRL_URB_RX_SIZE 1024
72#define CTRL_URB_TX_SIZE 64
73
74#define BULK_URB_RX_SIZE 4096
75#define BULK_URB_TX_SIZE 8192
76
77#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
78#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
79#define MUX_BULK_RX_BUF_COUNT 4
80#define USB_TYPE_OPTION_VENDOR 0x20
81
82/* These definitions are used with the struct hso_net flags element */
83/* - use *_bit operations on it. (bit indices not values.) */
84#define HSO_NET_RUNNING 0
85
86#define HSO_NET_TX_TIMEOUT (HZ*10)
87
88#define HSO_SERIAL_MAGIC 0x48534f31
89
90/* Number of ttys to handle */
91#define HSO_SERIAL_TTY_MINORS 256
92
93#define MAX_RX_URBS 2
94
95/*****************************************************************************/
96/* Debugging functions */
97/*****************************************************************************/
98#define hso_dbg(lvl, fmt, ...) \
99do { \
100 if ((lvl) & debug) \
101 pr_info("[%d:%s] " fmt, \
102 __LINE__, __func__, ##__VA_ARGS__); \
103} while (0)
104
105/*****************************************************************************/
106/* Enumerators */
107/*****************************************************************************/
108enum pkt_parse_state {
109 WAIT_IP,
110 WAIT_DATA,
111 WAIT_SYNC
112};
113
114/*****************************************************************************/
115/* Structs */
116/*****************************************************************************/
117
118struct hso_shared_int {
119 struct usb_endpoint_descriptor *intr_endp;
120 void *shared_intr_buf;
121 struct urb *shared_intr_urb;
122 struct usb_device *usb;
123 int use_count;
124 int ref_count;
125 struct mutex shared_int_lock;
126};
127
128struct hso_net {
129 struct hso_device *parent;
130 struct net_device *net;
131 struct rfkill *rfkill;
132 char name[24];
133
134 struct usb_endpoint_descriptor *in_endp;
135 struct usb_endpoint_descriptor *out_endp;
136
137 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
138 struct urb *mux_bulk_tx_urb;
139 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
140 void *mux_bulk_tx_buf;
141
142 struct sk_buff *skb_rx_buf;
143 struct sk_buff *skb_tx_buf;
144
145 enum pkt_parse_state rx_parse_state;
146 spinlock_t net_lock;
147
148 unsigned short rx_buf_size;
149 unsigned short rx_buf_missing;
150 struct iphdr rx_ip_hdr;
151
152 unsigned long flags;
153};
154
155enum rx_ctrl_state{
156 RX_IDLE,
157 RX_SENT,
158 RX_PENDING
159};
160
161#define BM_REQUEST_TYPE (0xa1)
162#define B_NOTIFICATION (0x20)
163#define W_VALUE (0x0)
164#define W_LENGTH (0x2)
165
166#define B_OVERRUN (0x1<<6)
167#define B_PARITY (0x1<<5)
168#define B_FRAMING (0x1<<4)
169#define B_RING_SIGNAL (0x1<<3)
170#define B_BREAK (0x1<<2)
171#define B_TX_CARRIER (0x1<<1)
172#define B_RX_CARRIER (0x1<<0)
173
174struct hso_serial_state_notification {
175 u8 bmRequestType;
176 u8 bNotification;
177 u16 wValue;
178 u16 wIndex;
179 u16 wLength;
180 u16 UART_state_bitmap;
181} __packed;
182
183struct hso_tiocmget {
184 struct mutex mutex;
185 wait_queue_head_t waitq;
186 int intr_completed;
187 struct usb_endpoint_descriptor *endp;
188 struct urb *urb;
189 struct hso_serial_state_notification *serial_state_notification;
190 u16 prev_UART_state_bitmap;
191 struct uart_icount icount;
192};
193
194
195struct hso_serial {
196 struct hso_device *parent;
197 int magic;
198 u8 minor;
199
200 struct hso_shared_int *shared_int;
201
202 /* rx/tx urb could be either a bulk urb or a control urb depending
203 on which serial port it is used on. */
204 struct urb *rx_urb[MAX_RX_URBS];
205 u8 num_rx_urbs;
206 u8 *rx_data[MAX_RX_URBS];
207 u16 rx_data_length; /* should contain allocated length */
208
209 struct urb *tx_urb;
210 u8 *tx_data;
211 u8 *tx_buffer;
212 u16 tx_data_length; /* should contain allocated length */
213 u16 tx_data_count;
214 u16 tx_buffer_count;
215 struct usb_ctrlrequest ctrl_req_tx;
216 struct usb_ctrlrequest ctrl_req_rx;
217
218 struct usb_endpoint_descriptor *in_endp;
219 struct usb_endpoint_descriptor *out_endp;
220
221 enum rx_ctrl_state rx_state;
222 u8 rts_state;
223 u8 dtr_state;
224 unsigned tx_urb_used:1;
225
226 struct tty_port port;
227 /* from usb_serial_port */
228 spinlock_t serial_lock;
229
230 int (*write_data) (struct hso_serial *serial);
231 struct hso_tiocmget *tiocmget;
232 /* Hacks required to get flow control
233 * working on the serial receive buffers
234 * so as not to drop characters on the floor.
235 */
236 int curr_rx_urb_idx;
237 u8 rx_urb_filled[MAX_RX_URBS];
238 struct tasklet_struct unthrottle_tasklet;
239};
240
241struct hso_device {
242 union {
243 struct hso_serial *dev_serial;
244 struct hso_net *dev_net;
245 } port_data;
246
247 u32 port_spec;
248
249 u8 is_active;
250 u8 usb_gone;
251 struct work_struct async_get_intf;
252 struct work_struct async_put_intf;
253
254 struct usb_device *usb;
255 struct usb_interface *interface;
256
257 struct device *dev;
258 struct kref ref;
259 struct mutex mutex;
260};
261
262/* Type of interface */
263#define HSO_INTF_MASK 0xFF00
264#define HSO_INTF_MUX 0x0100
265#define HSO_INTF_BULK 0x0200
266
267/* Type of port */
268#define HSO_PORT_MASK 0xFF
269#define HSO_PORT_NO_PORT 0x0
270#define HSO_PORT_CONTROL 0x1
271#define HSO_PORT_APP 0x2
272#define HSO_PORT_GPS 0x3
273#define HSO_PORT_PCSC 0x4
274#define HSO_PORT_APP2 0x5
275#define HSO_PORT_GPS_CONTROL 0x6
276#define HSO_PORT_MSD 0x7
277#define HSO_PORT_VOICE 0x8
278#define HSO_PORT_DIAG2 0x9
279#define HSO_PORT_DIAG 0x10
280#define HSO_PORT_MODEM 0x11
281#define HSO_PORT_NETWORK 0x12
282
283/* Additional device info */
284#define HSO_INFO_MASK 0xFF000000
285#define HSO_INFO_CRC_BUG 0x01000000
286
287/*****************************************************************************/
288/* Prototypes */
289/*****************************************************************************/
290/* Serial driver functions */
291static int hso_serial_tiocmset(struct tty_struct *tty,
292 unsigned int set, unsigned int clear);
293static void ctrl_callback(struct urb *urb);
294static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
295static void hso_kick_transmit(struct hso_serial *serial);
296/* Helper functions */
297static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
298 struct usb_device *usb, gfp_t gfp);
299static void handle_usb_error(int status, const char *function,
300 struct hso_device *hso_dev);
301static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
302 int type, int dir);
303static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
304static void hso_free_interface(struct usb_interface *intf);
305static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
306static int hso_stop_serial_device(struct hso_device *hso_dev);
307static int hso_start_net_device(struct hso_device *hso_dev);
308static void hso_free_shared_int(struct hso_shared_int *shared_int);
309static int hso_stop_net_device(struct hso_device *hso_dev);
310static void hso_serial_ref_free(struct kref *ref);
311static void hso_std_serial_read_bulk_callback(struct urb *urb);
312static int hso_mux_serial_read(struct hso_serial *serial);
313static void async_get_intf(struct work_struct *data);
314static void async_put_intf(struct work_struct *data);
315static int hso_put_activity(struct hso_device *hso_dev);
316static int hso_get_activity(struct hso_device *hso_dev);
317static void tiocmget_intr_callback(struct urb *urb);
318/*****************************************************************************/
319/* Helping functions */
320/*****************************************************************************/
321
322/* #define DEBUG */
323
324static inline struct hso_net *dev2net(struct hso_device *hso_dev)
325{
326 return hso_dev->port_data.dev_net;
327}
328
329static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
330{
331 return hso_dev->port_data.dev_serial;
332}
333
334/* Debugging functions */
335#ifdef DEBUG
336static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
337 unsigned int len)
338{
339 static char name[255];
340
341 sprintf(name, "hso[%d:%s]", line_count, func_name);
342 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
343}
344
345#define DUMP(buf_, len_) \
346 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
347
348#define DUMP1(buf_, len_) \
349 do { \
350 if (0x01 & debug) \
351 DUMP(buf_, len_); \
352 } while (0)
353#else
354#define DUMP(buf_, len_)
355#define DUMP1(buf_, len_)
356#endif
357
358/* module parameters */
359static int debug;
360static int tty_major;
361static int disable_net;
362
363/* driver info */
364static const char driver_name[] = "hso";
365static const char tty_filename[] = "ttyHS";
366static const char *version = __FILE__ ": " MOD_AUTHOR;
367/* the usb driver itself (registered in hso_init) */
368static struct usb_driver hso_driver;
369/* serial structures */
370static struct tty_driver *tty_drv;
371static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
372static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
373static spinlock_t serial_table_lock;
374
375static const s32 default_port_spec[] = {
376 HSO_INTF_MUX | HSO_PORT_NETWORK,
377 HSO_INTF_BULK | HSO_PORT_DIAG,
378 HSO_INTF_BULK | HSO_PORT_MODEM,
379 0
380};
381
382static const s32 icon321_port_spec[] = {
383 HSO_INTF_MUX | HSO_PORT_NETWORK,
384 HSO_INTF_BULK | HSO_PORT_DIAG2,
385 HSO_INTF_BULK | HSO_PORT_MODEM,
386 HSO_INTF_BULK | HSO_PORT_DIAG,
387 0
388};
389
390#define default_port_device(vendor, product) \
391 USB_DEVICE(vendor, product), \
392 .driver_info = (kernel_ulong_t)default_port_spec
393
394#define icon321_port_device(vendor, product) \
395 USB_DEVICE(vendor, product), \
396 .driver_info = (kernel_ulong_t)icon321_port_spec
397
398/* list of devices we support */
399static const struct usb_device_id hso_ids[] = {
400 {default_port_device(0x0af0, 0x6711)},
401 {default_port_device(0x0af0, 0x6731)},
402 {default_port_device(0x0af0, 0x6751)},
403 {default_port_device(0x0af0, 0x6771)},
404 {default_port_device(0x0af0, 0x6791)},
405 {default_port_device(0x0af0, 0x6811)},
406 {default_port_device(0x0af0, 0x6911)},
407 {default_port_device(0x0af0, 0x6951)},
408 {default_port_device(0x0af0, 0x6971)},
409 {default_port_device(0x0af0, 0x7011)},
410 {default_port_device(0x0af0, 0x7031)},
411 {default_port_device(0x0af0, 0x7051)},
412 {default_port_device(0x0af0, 0x7071)},
413 {default_port_device(0x0af0, 0x7111)},
414 {default_port_device(0x0af0, 0x7211)},
415 {default_port_device(0x0af0, 0x7251)},
416 {default_port_device(0x0af0, 0x7271)},
417 {default_port_device(0x0af0, 0x7311)},
418 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
419 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
420 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
421 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
422 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
423 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
424 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
425 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
426 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
427 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
428 {USB_DEVICE(0x0af0, 0x7701)},
429 {USB_DEVICE(0x0af0, 0x7706)},
430 {USB_DEVICE(0x0af0, 0x7801)},
431 {USB_DEVICE(0x0af0, 0x7901)},
432 {USB_DEVICE(0x0af0, 0x7A01)},
433 {USB_DEVICE(0x0af0, 0x7A05)},
434 {USB_DEVICE(0x0af0, 0x8200)},
435 {USB_DEVICE(0x0af0, 0x8201)},
436 {USB_DEVICE(0x0af0, 0x8300)},
437 {USB_DEVICE(0x0af0, 0x8302)},
438 {USB_DEVICE(0x0af0, 0x8304)},
439 {USB_DEVICE(0x0af0, 0x8400)},
440 {USB_DEVICE(0x0af0, 0x8600)},
441 {USB_DEVICE(0x0af0, 0x8800)},
442 {USB_DEVICE(0x0af0, 0x8900)},
443 {USB_DEVICE(0x0af0, 0x9000)},
444 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */
445 {USB_DEVICE(0x0af0, 0xd035)},
446 {USB_DEVICE(0x0af0, 0xd055)},
447 {USB_DEVICE(0x0af0, 0xd155)},
448 {USB_DEVICE(0x0af0, 0xd255)},
449 {USB_DEVICE(0x0af0, 0xd057)},
450 {USB_DEVICE(0x0af0, 0xd157)},
451 {USB_DEVICE(0x0af0, 0xd257)},
452 {USB_DEVICE(0x0af0, 0xd357)},
453 {USB_DEVICE(0x0af0, 0xd058)},
454 {USB_DEVICE(0x0af0, 0xc100)},
455 {}
456};
457MODULE_DEVICE_TABLE(usb, hso_ids);
458
459/* Sysfs attribute */
460static ssize_t hso_sysfs_show_porttype(struct device *dev,
461 struct device_attribute *attr,
462 char *buf)
463{
464 struct hso_device *hso_dev = dev_get_drvdata(dev);
465 char *port_name;
466
467 if (!hso_dev)
468 return 0;
469
470 switch (hso_dev->port_spec & HSO_PORT_MASK) {
471 case HSO_PORT_CONTROL:
472 port_name = "Control";
473 break;
474 case HSO_PORT_APP:
475 port_name = "Application";
476 break;
477 case HSO_PORT_APP2:
478 port_name = "Application2";
479 break;
480 case HSO_PORT_GPS:
481 port_name = "GPS";
482 break;
483 case HSO_PORT_GPS_CONTROL:
484 port_name = "GPS Control";
485 break;
486 case HSO_PORT_PCSC:
487 port_name = "PCSC";
488 break;
489 case HSO_PORT_DIAG:
490 port_name = "Diagnostic";
491 break;
492 case HSO_PORT_DIAG2:
493 port_name = "Diagnostic2";
494 break;
495 case HSO_PORT_MODEM:
496 port_name = "Modem";
497 break;
498 case HSO_PORT_NETWORK:
499 port_name = "Network";
500 break;
501 default:
502 port_name = "Unknown";
503 break;
504 }
505
506 return sprintf(buf, "%s\n", port_name);
507}
508static DEVICE_ATTR(hsotype, 0444, hso_sysfs_show_porttype, NULL);
509
510static struct attribute *hso_serial_dev_attrs[] = {
511 &dev_attr_hsotype.attr,
512 NULL
513};
514
515ATTRIBUTE_GROUPS(hso_serial_dev);
516
517static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
518{
519 int idx;
520
521 for (idx = 0; idx < serial->num_rx_urbs; idx++)
522 if (serial->rx_urb[idx] == urb)
523 return idx;
524 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
525 return -1;
526}
527
528/* converts mux value to a port spec value */
529static u32 hso_mux_to_port(int mux)
530{
531 u32 result;
532
533 switch (mux) {
534 case 0x1:
535 result = HSO_PORT_CONTROL;
536 break;
537 case 0x2:
538 result = HSO_PORT_APP;
539 break;
540 case 0x4:
541 result = HSO_PORT_PCSC;
542 break;
543 case 0x8:
544 result = HSO_PORT_GPS;
545 break;
546 case 0x10:
547 result = HSO_PORT_APP2;
548 break;
549 default:
550 result = HSO_PORT_NO_PORT;
551 }
552 return result;
553}
554
555/* converts port spec value to a mux value */
556static u32 hso_port_to_mux(int port)
557{
558 u32 result;
559
560 switch (port & HSO_PORT_MASK) {
561 case HSO_PORT_CONTROL:
562 result = 0x0;
563 break;
564 case HSO_PORT_APP:
565 result = 0x1;
566 break;
567 case HSO_PORT_PCSC:
568 result = 0x2;
569 break;
570 case HSO_PORT_GPS:
571 result = 0x3;
572 break;
573 case HSO_PORT_APP2:
574 result = 0x4;
575 break;
576 default:
577 result = 0x0;
578 }
579 return result;
580}
581
582static struct hso_serial *get_serial_by_shared_int_and_type(
583 struct hso_shared_int *shared_int,
584 int mux)
585{
586 int i, port;
587
588 port = hso_mux_to_port(mux);
589
590 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
591 if (serial_table[i] &&
592 (dev2ser(serial_table[i])->shared_int == shared_int) &&
593 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
594 return dev2ser(serial_table[i]);
595 }
596 }
597
598 return NULL;
599}
600
601static struct hso_serial *get_serial_by_index(unsigned index)
602{
603 struct hso_serial *serial = NULL;
604 unsigned long flags;
605
606 spin_lock_irqsave(&serial_table_lock, flags);
607 if (serial_table[index])
608 serial = dev2ser(serial_table[index]);
609 spin_unlock_irqrestore(&serial_table_lock, flags);
610
611 return serial;
612}
613
614static int get_free_serial_index(void)
615{
616 int index;
617 unsigned long flags;
618
619 spin_lock_irqsave(&serial_table_lock, flags);
620 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
621 if (serial_table[index] == NULL) {
622 spin_unlock_irqrestore(&serial_table_lock, flags);
623 return index;
624 }
625 }
626 spin_unlock_irqrestore(&serial_table_lock, flags);
627
628 pr_err("%s: no free serial devices in table\n", __func__);
629 return -1;
630}
631
632static void set_serial_by_index(unsigned index, struct hso_serial *serial)
633{
634 unsigned long flags;
635
636 spin_lock_irqsave(&serial_table_lock, flags);
637 if (serial)
638 serial_table[index] = serial->parent;
639 else
640 serial_table[index] = NULL;
641 spin_unlock_irqrestore(&serial_table_lock, flags);
642}
643
644static void handle_usb_error(int status, const char *function,
645 struct hso_device *hso_dev)
646{
647 char *explanation;
648
649 switch (status) {
650 case -ENODEV:
651 explanation = "no device";
652 break;
653 case -ENOENT:
654 explanation = "endpoint not enabled";
655 break;
656 case -EPIPE:
657 explanation = "endpoint stalled";
658 break;
659 case -ENOSPC:
660 explanation = "not enough bandwidth";
661 break;
662 case -ESHUTDOWN:
663 explanation = "device disabled";
664 break;
665 case -EHOSTUNREACH:
666 explanation = "device suspended";
667 break;
668 case -EINVAL:
669 case -EAGAIN:
670 case -EFBIG:
671 case -EMSGSIZE:
672 explanation = "internal error";
673 break;
674 case -EILSEQ:
675 case -EPROTO:
676 case -ETIME:
677 case -ETIMEDOUT:
678 explanation = "protocol error";
679 if (hso_dev)
680 usb_queue_reset_device(hso_dev->interface);
681 break;
682 default:
683 explanation = "unknown status";
684 break;
685 }
686
687 /* log a meaningful explanation of an USB status */
688 hso_dbg(0x1, "%s: received USB status - %s (%d)\n",
689 function, explanation, status);
690}
691
692/* Network interface functions */
693
694/* called when net interface is brought up by ifconfig */
695static int hso_net_open(struct net_device *net)
696{
697 struct hso_net *odev = netdev_priv(net);
698 unsigned long flags = 0;
699
700 if (!odev) {
701 dev_err(&net->dev, "No net device !\n");
702 return -ENODEV;
703 }
704
705 odev->skb_tx_buf = NULL;
706
707 /* setup environment */
708 spin_lock_irqsave(&odev->net_lock, flags);
709 odev->rx_parse_state = WAIT_IP;
710 odev->rx_buf_size = 0;
711 odev->rx_buf_missing = sizeof(struct iphdr);
712 spin_unlock_irqrestore(&odev->net_lock, flags);
713
714 /* We are up and running. */
715 set_bit(HSO_NET_RUNNING, &odev->flags);
716 hso_start_net_device(odev->parent);
717
718 /* Tell the kernel we are ready to start receiving from it */
719 netif_start_queue(net);
720
721 return 0;
722}
723
724/* called when interface is brought down by ifconfig */
725static int hso_net_close(struct net_device *net)
726{
727 struct hso_net *odev = netdev_priv(net);
728
729 /* we don't need the queue anymore */
730 netif_stop_queue(net);
731 /* no longer running */
732 clear_bit(HSO_NET_RUNNING, &odev->flags);
733
734 hso_stop_net_device(odev->parent);
735
736 /* done */
737 return 0;
738}
739
740/* USB tells is xmit done, we should start the netqueue again */
741static void write_bulk_callback(struct urb *urb)
742{
743 struct hso_net *odev = urb->context;
744 int status = urb->status;
745
746 /* Sanity check */
747 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
748 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
749 return;
750 }
751
752 /* Do we still have a valid kernel network device? */
753 if (!netif_device_present(odev->net)) {
754 dev_err(&urb->dev->dev, "%s: net device not present\n",
755 __func__);
756 return;
757 }
758
759 /* log status, but don't act on it, we don't need to resubmit anything
760 * anyhow */
761 if (status)
762 handle_usb_error(status, __func__, odev->parent);
763
764 hso_put_activity(odev->parent);
765
766 /* Tell the network interface we are ready for another frame */
767 netif_wake_queue(odev->net);
768}
769
770/* called by kernel when we need to transmit a packet */
771static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
772 struct net_device *net)
773{
774 struct hso_net *odev = netdev_priv(net);
775 int result;
776
777 /* Tell the kernel, "No more frames 'til we are done with this one." */
778 netif_stop_queue(net);
779 if (hso_get_activity(odev->parent) == -EAGAIN) {
780 odev->skb_tx_buf = skb;
781 return NETDEV_TX_OK;
782 }
783
784 /* log if asked */
785 DUMP1(skb->data, skb->len);
786 /* Copy it from kernel memory to OUR memory */
787 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
788 hso_dbg(0x1, "len: %d/%d\n", skb->len, MUX_BULK_TX_BUF_SIZE);
789
790 /* Fill in the URB for shipping it out. */
791 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
792 odev->parent->usb,
793 usb_sndbulkpipe(odev->parent->usb,
794 odev->out_endp->
795 bEndpointAddress & 0x7F),
796 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
797 odev);
798
799 /* Deal with the Zero Length packet problem, I hope */
800 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
801
802 /* Send the URB on its merry way. */
803 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
804 if (result) {
805 dev_warn(&odev->parent->interface->dev,
806 "failed mux_bulk_tx_urb %d\n", result);
807 net->stats.tx_errors++;
808 netif_start_queue(net);
809 } else {
810 net->stats.tx_packets++;
811 net->stats.tx_bytes += skb->len;
812 }
813 dev_kfree_skb(skb);
814 /* we're done */
815 return NETDEV_TX_OK;
816}
817
818static const struct ethtool_ops ops = {
819 .get_link = ethtool_op_get_link
820};
821
822/* called when a packet did not ack after watchdogtimeout */
823static void hso_net_tx_timeout(struct net_device *net)
824{
825 struct hso_net *odev = netdev_priv(net);
826
827 if (!odev)
828 return;
829
830 /* Tell syslog we are hosed. */
831 dev_warn(&net->dev, "Tx timed out.\n");
832
833 /* Tear the waiting frame off the list */
834 if (odev->mux_bulk_tx_urb &&
835 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
836 usb_unlink_urb(odev->mux_bulk_tx_urb);
837
838 /* Update statistics */
839 net->stats.tx_errors++;
840}
841
842/* make a real packet from the received USB buffer */
843static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
844 unsigned int count, unsigned char is_eop)
845{
846 unsigned short temp_bytes;
847 unsigned short buffer_offset = 0;
848 unsigned short frame_len;
849
850 /* log if needed */
851 hso_dbg(0x1, "Rx %d bytes\n", count);
852 DUMP(ip_pkt, min(128, (int)count));
853
854 while (count) {
855 switch (odev->rx_parse_state) {
856 case WAIT_IP:
857 /* waiting for IP header. */
858 /* wanted bytes - size of ip header */
859 temp_bytes =
860 (count <
861 odev->rx_buf_missing) ? count : odev->
862 rx_buf_missing;
863
864 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
865 odev->rx_buf_size, ip_pkt + buffer_offset,
866 temp_bytes);
867
868 odev->rx_buf_size += temp_bytes;
869 buffer_offset += temp_bytes;
870 odev->rx_buf_missing -= temp_bytes;
871 count -= temp_bytes;
872
873 if (!odev->rx_buf_missing) {
874 /* header is complete allocate an sk_buffer and
875 * continue to WAIT_DATA */
876 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
877
878 if ((frame_len > DEFAULT_MRU) ||
879 (frame_len < sizeof(struct iphdr))) {
880 dev_err(&odev->net->dev,
881 "Invalid frame (%d) length\n",
882 frame_len);
883 odev->rx_parse_state = WAIT_SYNC;
884 continue;
885 }
886 /* Allocate an sk_buff */
887 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
888 frame_len);
889 if (!odev->skb_rx_buf) {
890 /* We got no receive buffer. */
891 hso_dbg(0x1, "could not allocate memory\n");
892 odev->rx_parse_state = WAIT_SYNC;
893 continue;
894 }
895
896 /* Copy what we got so far. make room for iphdr
897 * after tail. */
898 skb_put_data(odev->skb_rx_buf,
899 (char *)&(odev->rx_ip_hdr),
900 sizeof(struct iphdr));
901
902 /* ETH_HLEN */
903 odev->rx_buf_size = sizeof(struct iphdr);
904
905 /* Filip actually use .tot_len */
906 odev->rx_buf_missing =
907 frame_len - sizeof(struct iphdr);
908 odev->rx_parse_state = WAIT_DATA;
909 }
910 break;
911
912 case WAIT_DATA:
913 temp_bytes = (count < odev->rx_buf_missing)
914 ? count : odev->rx_buf_missing;
915
916 /* Copy the rest of the bytes that are left in the
917 * buffer into the waiting sk_buf. */
918 /* Make room for temp_bytes after tail. */
919 skb_put_data(odev->skb_rx_buf,
920 ip_pkt + buffer_offset,
921 temp_bytes);
922
923 odev->rx_buf_missing -= temp_bytes;
924 count -= temp_bytes;
925 buffer_offset += temp_bytes;
926 odev->rx_buf_size += temp_bytes;
927 if (!odev->rx_buf_missing) {
928 /* Packet is complete. Inject into stack. */
929 /* We have IP packet here */
930 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
931 skb_reset_mac_header(odev->skb_rx_buf);
932
933 /* Ship it off to the kernel */
934 netif_rx(odev->skb_rx_buf);
935 /* No longer our buffer. */
936 odev->skb_rx_buf = NULL;
937
938 /* update out statistics */
939 odev->net->stats.rx_packets++;
940
941 odev->net->stats.rx_bytes += odev->rx_buf_size;
942
943 odev->rx_buf_size = 0;
944 odev->rx_buf_missing = sizeof(struct iphdr);
945 odev->rx_parse_state = WAIT_IP;
946 }
947 break;
948
949 case WAIT_SYNC:
950 hso_dbg(0x1, " W_S\n");
951 count = 0;
952 break;
953 default:
954 hso_dbg(0x1, "\n");
955 count--;
956 break;
957 }
958 }
959
960 /* Recovery mechanism for WAIT_SYNC state. */
961 if (is_eop) {
962 if (odev->rx_parse_state == WAIT_SYNC) {
963 odev->rx_parse_state = WAIT_IP;
964 odev->rx_buf_size = 0;
965 odev->rx_buf_missing = sizeof(struct iphdr);
966 }
967 }
968}
969
970static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
971{
972 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
973 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
974
975 if (((rest == 5) || (rest == 6)) &&
976 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
977 crc_check, 4)) {
978 urb->actual_length -= 4;
979 }
980}
981
982/* Moving data from usb to kernel (in interrupt state) */
983static void read_bulk_callback(struct urb *urb)
984{
985 struct hso_net *odev = urb->context;
986 struct net_device *net;
987 int result;
988 unsigned long flags;
989 int status = urb->status;
990
991 /* is al ok? (Filip: Who's Al ?) */
992 if (status) {
993 handle_usb_error(status, __func__, odev->parent);
994 return;
995 }
996
997 /* Sanity check */
998 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
999 hso_dbg(0x1, "BULK IN callback but driver is not active!\n");
1000 return;
1001 }
1002 usb_mark_last_busy(urb->dev);
1003
1004 net = odev->net;
1005
1006 if (!netif_device_present(net)) {
1007 /* Somebody killed our network interface... */
1008 return;
1009 }
1010
1011 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1012 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1013
1014 /* do we even have a packet? */
1015 if (urb->actual_length) {
1016 /* Handle the IP stream, add header and push it onto network
1017 * stack if the packet is complete. */
1018 spin_lock_irqsave(&odev->net_lock, flags);
1019 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1020 (urb->transfer_buffer_length >
1021 urb->actual_length) ? 1 : 0);
1022 spin_unlock_irqrestore(&odev->net_lock, flags);
1023 }
1024
1025 /* We are done with this URB, resubmit it. Prep the USB to wait for
1026 * another frame. Reuse same as received. */
1027 usb_fill_bulk_urb(urb,
1028 odev->parent->usb,
1029 usb_rcvbulkpipe(odev->parent->usb,
1030 odev->in_endp->
1031 bEndpointAddress & 0x7F),
1032 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1033 read_bulk_callback, odev);
1034
1035 /* Give this to the USB subsystem so it can tell us when more data
1036 * arrives. */
1037 result = usb_submit_urb(urb, GFP_ATOMIC);
1038 if (result)
1039 dev_warn(&odev->parent->interface->dev,
1040 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1041 result);
1042}
1043
1044/* Serial driver functions */
1045
1046static void hso_init_termios(struct ktermios *termios)
1047{
1048 /*
1049 * The default requirements for this device are:
1050 */
1051 termios->c_iflag &=
1052 ~(IGNBRK /* disable ignore break */
1053 | BRKINT /* disable break causes interrupt */
1054 | PARMRK /* disable mark parity errors */
1055 | ISTRIP /* disable clear high bit of input characters */
1056 | INLCR /* disable translate NL to CR */
1057 | IGNCR /* disable ignore CR */
1058 | ICRNL /* disable translate CR to NL */
1059 | IXON); /* disable enable XON/XOFF flow control */
1060
1061 /* disable postprocess output characters */
1062 termios->c_oflag &= ~OPOST;
1063
1064 termios->c_lflag &=
1065 ~(ECHO /* disable echo input characters */
1066 | ECHONL /* disable echo new line */
1067 | ICANON /* disable erase, kill, werase, and rprnt
1068 special characters */
1069 | ISIG /* disable interrupt, quit, and suspend special
1070 characters */
1071 | IEXTEN); /* disable non-POSIX special characters */
1072
1073 termios->c_cflag &=
1074 ~(CSIZE /* no size */
1075 | PARENB /* disable parity bit */
1076 | CBAUD /* clear current baud rate */
1077 | CBAUDEX); /* clear current buad rate */
1078
1079 termios->c_cflag |= CS8; /* character size 8 bits */
1080
1081 /* baud rate 115200 */
1082 tty_termios_encode_baud_rate(termios, 115200, 115200);
1083}
1084
1085static void _hso_serial_set_termios(struct tty_struct *tty,
1086 struct ktermios *old)
1087{
1088 struct hso_serial *serial = tty->driver_data;
1089
1090 if (!serial) {
1091 pr_err("%s: no tty structures", __func__);
1092 return;
1093 }
1094
1095 hso_dbg(0x8, "port %d\n", serial->minor);
1096
1097 /*
1098 * Fix up unsupported bits
1099 */
1100 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1101
1102 tty->termios.c_cflag &=
1103 ~(CSIZE /* no size */
1104 | PARENB /* disable parity bit */
1105 | CBAUD /* clear current baud rate */
1106 | CBAUDEX); /* clear current buad rate */
1107
1108 tty->termios.c_cflag |= CS8; /* character size 8 bits */
1109
1110 /* baud rate 115200 */
1111 tty_encode_baud_rate(tty, 115200, 115200);
1112}
1113
1114static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1115{
1116 int result;
1117 /* We are done with this URB, resubmit it. Prep the USB to wait for
1118 * another frame */
1119 usb_fill_bulk_urb(urb, serial->parent->usb,
1120 usb_rcvbulkpipe(serial->parent->usb,
1121 serial->in_endp->
1122 bEndpointAddress & 0x7F),
1123 urb->transfer_buffer, serial->rx_data_length,
1124 hso_std_serial_read_bulk_callback, serial);
1125 /* Give this to the USB subsystem so it can tell us when more data
1126 * arrives. */
1127 result = usb_submit_urb(urb, GFP_ATOMIC);
1128 if (result) {
1129 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1130 __func__, result);
1131 }
1132}
1133
1134
1135
1136
1137static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1138{
1139 int count;
1140 struct urb *curr_urb;
1141
1142 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1143 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1144 count = put_rxbuf_data(curr_urb, serial);
1145 if (count == -1)
1146 return;
1147 if (count == 0) {
1148 serial->curr_rx_urb_idx++;
1149 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1150 serial->curr_rx_urb_idx = 0;
1151 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1152 }
1153 }
1154}
1155
1156static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1157{
1158 int count = 0;
1159 struct urb *urb;
1160
1161 urb = serial->rx_urb[0];
1162 if (serial->port.count > 0) {
1163 count = put_rxbuf_data(urb, serial);
1164 if (count == -1)
1165 return;
1166 }
1167 /* Re issue a read as long as we receive data. */
1168
1169 if (count == 0 && ((urb->actual_length != 0) ||
1170 (serial->rx_state == RX_PENDING))) {
1171 serial->rx_state = RX_SENT;
1172 hso_mux_serial_read(serial);
1173 } else
1174 serial->rx_state = RX_IDLE;
1175}
1176
1177
1178/* read callback for Diag and CS port */
1179static void hso_std_serial_read_bulk_callback(struct urb *urb)
1180{
1181 struct hso_serial *serial = urb->context;
1182 int status = urb->status;
1183 unsigned long flags;
1184
1185 hso_dbg(0x8, "--- Got serial_read_bulk callback %02x ---\n", status);
1186
1187 /* sanity check */
1188 if (!serial) {
1189 hso_dbg(0x1, "serial == NULL\n");
1190 return;
1191 }
1192 if (status) {
1193 handle_usb_error(status, __func__, serial->parent);
1194 return;
1195 }
1196
1197 hso_dbg(0x1, "Actual length = %d\n", urb->actual_length);
1198 DUMP1(urb->transfer_buffer, urb->actual_length);
1199
1200 /* Anyone listening? */
1201 if (serial->port.count == 0)
1202 return;
1203
1204 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1205 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1206 /* Valid data, handle RX data */
1207 spin_lock_irqsave(&serial->serial_lock, flags);
1208 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1209 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1210 spin_unlock_irqrestore(&serial->serial_lock, flags);
1211}
1212
1213/*
1214 * This needs to be a tasklet otherwise we will
1215 * end up recursively calling this function.
1216 */
1217static void hso_unthrottle_tasklet(struct hso_serial *serial)
1218{
1219 unsigned long flags;
1220
1221 spin_lock_irqsave(&serial->serial_lock, flags);
1222 if ((serial->parent->port_spec & HSO_INTF_MUX))
1223 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1224 else
1225 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1226 spin_unlock_irqrestore(&serial->serial_lock, flags);
1227}
1228
1229static void hso_unthrottle(struct tty_struct *tty)
1230{
1231 struct hso_serial *serial = tty->driver_data;
1232
1233 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1234}
1235
1236/* open the requested serial port */
1237static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1238{
1239 struct hso_serial *serial = get_serial_by_index(tty->index);
1240 int result;
1241
1242 /* sanity check */
1243 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1244 WARN_ON(1);
1245 tty->driver_data = NULL;
1246 hso_dbg(0x1, "Failed to open port\n");
1247 return -ENODEV;
1248 }
1249
1250 mutex_lock(&serial->parent->mutex);
1251 result = usb_autopm_get_interface(serial->parent->interface);
1252 if (result < 0)
1253 goto err_out;
1254
1255 hso_dbg(0x1, "Opening %d\n", serial->minor);
1256
1257 /* setup */
1258 tty->driver_data = serial;
1259 tty_port_tty_set(&serial->port, tty);
1260
1261 /* check for port already opened, if not set the termios */
1262 serial->port.count++;
1263 if (serial->port.count == 1) {
1264 serial->rx_state = RX_IDLE;
1265 /* Force default termio settings */
1266 _hso_serial_set_termios(tty, NULL);
1267 tasklet_init(&serial->unthrottle_tasklet,
1268 (void (*)(unsigned long))hso_unthrottle_tasklet,
1269 (unsigned long)serial);
1270 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1271 if (result) {
1272 hso_stop_serial_device(serial->parent);
1273 serial->port.count--;
1274 } else {
1275 kref_get(&serial->parent->ref);
1276 }
1277 } else {
1278 hso_dbg(0x1, "Port was already open\n");
1279 }
1280
1281 usb_autopm_put_interface(serial->parent->interface);
1282
1283 /* done */
1284 if (result)
1285 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1286err_out:
1287 mutex_unlock(&serial->parent->mutex);
1288 return result;
1289}
1290
1291/* close the requested serial port */
1292static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1293{
1294 struct hso_serial *serial = tty->driver_data;
1295 u8 usb_gone;
1296
1297 hso_dbg(0x1, "Closing serial port\n");
1298
1299 /* Open failed, no close cleanup required */
1300 if (serial == NULL)
1301 return;
1302
1303 mutex_lock(&serial->parent->mutex);
1304 usb_gone = serial->parent->usb_gone;
1305
1306 if (!usb_gone)
1307 usb_autopm_get_interface(serial->parent->interface);
1308
1309 /* reset the rts and dtr */
1310 /* do the actual close */
1311 serial->port.count--;
1312
1313 if (serial->port.count <= 0) {
1314 serial->port.count = 0;
1315 tty_port_tty_set(&serial->port, NULL);
1316 if (!usb_gone)
1317 hso_stop_serial_device(serial->parent);
1318 tasklet_kill(&serial->unthrottle_tasklet);
1319 }
1320
1321 if (!usb_gone)
1322 usb_autopm_put_interface(serial->parent->interface);
1323
1324 mutex_unlock(&serial->parent->mutex);
1325}
1326
1327/* close the requested serial port */
1328static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1329 int count)
1330{
1331 struct hso_serial *serial = tty->driver_data;
1332 int space, tx_bytes;
1333 unsigned long flags;
1334
1335 /* sanity check */
1336 if (serial == NULL) {
1337 pr_err("%s: serial is NULL\n", __func__);
1338 return -ENODEV;
1339 }
1340
1341 spin_lock_irqsave(&serial->serial_lock, flags);
1342
1343 space = serial->tx_data_length - serial->tx_buffer_count;
1344 tx_bytes = (count < space) ? count : space;
1345
1346 if (!tx_bytes)
1347 goto out;
1348
1349 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1350 serial->tx_buffer_count += tx_bytes;
1351
1352out:
1353 spin_unlock_irqrestore(&serial->serial_lock, flags);
1354
1355 hso_kick_transmit(serial);
1356 /* done */
1357 return tx_bytes;
1358}
1359
1360/* how much room is there for writing */
1361static int hso_serial_write_room(struct tty_struct *tty)
1362{
1363 struct hso_serial *serial = tty->driver_data;
1364 int room;
1365 unsigned long flags;
1366
1367 spin_lock_irqsave(&serial->serial_lock, flags);
1368 room = serial->tx_data_length - serial->tx_buffer_count;
1369 spin_unlock_irqrestore(&serial->serial_lock, flags);
1370
1371 /* return free room */
1372 return room;
1373}
1374
1375static void hso_serial_cleanup(struct tty_struct *tty)
1376{
1377 struct hso_serial *serial = tty->driver_data;
1378
1379 if (!serial)
1380 return;
1381
1382 kref_put(&serial->parent->ref, hso_serial_ref_free);
1383}
1384
1385/* setup the term */
1386static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1387{
1388 struct hso_serial *serial = tty->driver_data;
1389 unsigned long flags;
1390
1391 if (old)
1392 hso_dbg(0x16, "Termios called with: cflags new[%d] - old[%d]\n",
1393 tty->termios.c_cflag, old->c_cflag);
1394
1395 /* the actual setup */
1396 spin_lock_irqsave(&serial->serial_lock, flags);
1397 if (serial->port.count)
1398 _hso_serial_set_termios(tty, old);
1399 else
1400 tty->termios = *old;
1401 spin_unlock_irqrestore(&serial->serial_lock, flags);
1402
1403 /* done */
1404}
1405
1406/* how many characters in the buffer */
1407static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1408{
1409 struct hso_serial *serial = tty->driver_data;
1410 int chars;
1411 unsigned long flags;
1412
1413 /* sanity check */
1414 if (serial == NULL)
1415 return 0;
1416
1417 spin_lock_irqsave(&serial->serial_lock, flags);
1418 chars = serial->tx_buffer_count;
1419 spin_unlock_irqrestore(&serial->serial_lock, flags);
1420
1421 return chars;
1422}
1423static int tiocmget_submit_urb(struct hso_serial *serial,
1424 struct hso_tiocmget *tiocmget,
1425 struct usb_device *usb)
1426{
1427 int result;
1428
1429 if (serial->parent->usb_gone)
1430 return -ENODEV;
1431 usb_fill_int_urb(tiocmget->urb, usb,
1432 usb_rcvintpipe(usb,
1433 tiocmget->endp->
1434 bEndpointAddress & 0x7F),
1435 tiocmget->serial_state_notification,
1436 sizeof(struct hso_serial_state_notification),
1437 tiocmget_intr_callback, serial,
1438 tiocmget->endp->bInterval);
1439 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1440 if (result) {
1441 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1442 result);
1443 }
1444 return result;
1445
1446}
1447
1448static void tiocmget_intr_callback(struct urb *urb)
1449{
1450 struct hso_serial *serial = urb->context;
1451 struct hso_tiocmget *tiocmget;
1452 int status = urb->status;
1453 u16 UART_state_bitmap, prev_UART_state_bitmap;
1454 struct uart_icount *icount;
1455 struct hso_serial_state_notification *serial_state_notification;
1456 struct usb_device *usb;
1457 struct usb_interface *interface;
1458 int if_num;
1459
1460 /* Sanity checks */
1461 if (!serial)
1462 return;
1463 if (status) {
1464 handle_usb_error(status, __func__, serial->parent);
1465 return;
1466 }
1467
1468 /* tiocmget is only supported on HSO_PORT_MODEM */
1469 tiocmget = serial->tiocmget;
1470 if (!tiocmget)
1471 return;
1472 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
1473
1474 usb = serial->parent->usb;
1475 interface = serial->parent->interface;
1476
1477 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1478
1479 /* wIndex should be the USB interface number of the port to which the
1480 * notification applies, which should always be the Modem port.
1481 */
1482 serial_state_notification = tiocmget->serial_state_notification;
1483 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1484 serial_state_notification->bNotification != B_NOTIFICATION ||
1485 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1486 le16_to_cpu(serial_state_notification->wIndex) != if_num ||
1487 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1488 dev_warn(&usb->dev,
1489 "hso received invalid serial state notification\n");
1490 DUMP(serial_state_notification,
1491 sizeof(struct hso_serial_state_notification));
1492 } else {
1493 unsigned long flags;
1494
1495 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1496 UART_state_bitmap);
1497 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1498 icount = &tiocmget->icount;
1499 spin_lock_irqsave(&serial->serial_lock, flags);
1500 if ((UART_state_bitmap & B_OVERRUN) !=
1501 (prev_UART_state_bitmap & B_OVERRUN))
1502 icount->parity++;
1503 if ((UART_state_bitmap & B_PARITY) !=
1504 (prev_UART_state_bitmap & B_PARITY))
1505 icount->parity++;
1506 if ((UART_state_bitmap & B_FRAMING) !=
1507 (prev_UART_state_bitmap & B_FRAMING))
1508 icount->frame++;
1509 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1510 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1511 icount->rng++;
1512 if ((UART_state_bitmap & B_BREAK) !=
1513 (prev_UART_state_bitmap & B_BREAK))
1514 icount->brk++;
1515 if ((UART_state_bitmap & B_TX_CARRIER) !=
1516 (prev_UART_state_bitmap & B_TX_CARRIER))
1517 icount->dsr++;
1518 if ((UART_state_bitmap & B_RX_CARRIER) !=
1519 (prev_UART_state_bitmap & B_RX_CARRIER))
1520 icount->dcd++;
1521 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1522 spin_unlock_irqrestore(&serial->serial_lock, flags);
1523 tiocmget->intr_completed = 1;
1524 wake_up_interruptible(&tiocmget->waitq);
1525 }
1526 memset(serial_state_notification, 0,
1527 sizeof(struct hso_serial_state_notification));
1528 tiocmget_submit_urb(serial,
1529 tiocmget,
1530 serial->parent->usb);
1531}
1532
1533/*
1534 * next few functions largely stolen from drivers/serial/serial_core.c
1535 */
1536/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1537 * - mask passed in arg for lines of interest
1538 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1539 * Caller should use TIOCGICOUNT to see which one it was
1540 */
1541static int
1542hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1543{
1544 DECLARE_WAITQUEUE(wait, current);
1545 struct uart_icount cprev, cnow;
1546 struct hso_tiocmget *tiocmget;
1547 int ret;
1548
1549 tiocmget = serial->tiocmget;
1550 if (!tiocmget)
1551 return -ENOENT;
1552 /*
1553 * note the counters on entry
1554 */
1555 spin_lock_irq(&serial->serial_lock);
1556 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1557 spin_unlock_irq(&serial->serial_lock);
1558 add_wait_queue(&tiocmget->waitq, &wait);
1559 for (;;) {
1560 spin_lock_irq(&serial->serial_lock);
1561 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1562 spin_unlock_irq(&serial->serial_lock);
1563 set_current_state(TASK_INTERRUPTIBLE);
1564 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1565 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1566 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1567 ret = 0;
1568 break;
1569 }
1570 schedule();
1571 /* see if a signal did it */
1572 if (signal_pending(current)) {
1573 ret = -ERESTARTSYS;
1574 break;
1575 }
1576 cprev = cnow;
1577 }
1578 __set_current_state(TASK_RUNNING);
1579 remove_wait_queue(&tiocmget->waitq, &wait);
1580
1581 return ret;
1582}
1583
1584/*
1585 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1586 * Return: write counters to the user passed counter struct
1587 * NB: both 1->0 and 0->1 transitions are counted except for
1588 * RI where only 0->1 is counted.
1589 */
1590static int hso_get_count(struct tty_struct *tty,
1591 struct serial_icounter_struct *icount)
1592{
1593 struct uart_icount cnow;
1594 struct hso_serial *serial = tty->driver_data;
1595 struct hso_tiocmget *tiocmget = serial->tiocmget;
1596
1597 memset(icount, 0, sizeof(struct serial_icounter_struct));
1598
1599 if (!tiocmget)
1600 return -ENOENT;
1601 spin_lock_irq(&serial->serial_lock);
1602 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1603 spin_unlock_irq(&serial->serial_lock);
1604
1605 icount->cts = cnow.cts;
1606 icount->dsr = cnow.dsr;
1607 icount->rng = cnow.rng;
1608 icount->dcd = cnow.dcd;
1609 icount->rx = cnow.rx;
1610 icount->tx = cnow.tx;
1611 icount->frame = cnow.frame;
1612 icount->overrun = cnow.overrun;
1613 icount->parity = cnow.parity;
1614 icount->brk = cnow.brk;
1615 icount->buf_overrun = cnow.buf_overrun;
1616
1617 return 0;
1618}
1619
1620
1621static int hso_serial_tiocmget(struct tty_struct *tty)
1622{
1623 int retval;
1624 struct hso_serial *serial = tty->driver_data;
1625 struct hso_tiocmget *tiocmget;
1626 u16 UART_state_bitmap;
1627
1628 /* sanity check */
1629 if (!serial) {
1630 hso_dbg(0x1, "no tty structures\n");
1631 return -EINVAL;
1632 }
1633 spin_lock_irq(&serial->serial_lock);
1634 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1635 ((serial->dtr_state) ? TIOCM_DTR : 0);
1636 tiocmget = serial->tiocmget;
1637 if (tiocmget) {
1638
1639 UART_state_bitmap = le16_to_cpu(
1640 tiocmget->prev_UART_state_bitmap);
1641 if (UART_state_bitmap & B_RING_SIGNAL)
1642 retval |= TIOCM_RNG;
1643 if (UART_state_bitmap & B_RX_CARRIER)
1644 retval |= TIOCM_CD;
1645 if (UART_state_bitmap & B_TX_CARRIER)
1646 retval |= TIOCM_DSR;
1647 }
1648 spin_unlock_irq(&serial->serial_lock);
1649 return retval;
1650}
1651
1652static int hso_serial_tiocmset(struct tty_struct *tty,
1653 unsigned int set, unsigned int clear)
1654{
1655 int val = 0;
1656 unsigned long flags;
1657 int if_num;
1658 struct hso_serial *serial = tty->driver_data;
1659 struct usb_interface *interface;
1660
1661 /* sanity check */
1662 if (!serial) {
1663 hso_dbg(0x1, "no tty structures\n");
1664 return -EINVAL;
1665 }
1666
1667 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1668 return -EINVAL;
1669
1670 interface = serial->parent->interface;
1671 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1672
1673 spin_lock_irqsave(&serial->serial_lock, flags);
1674 if (set & TIOCM_RTS)
1675 serial->rts_state = 1;
1676 if (set & TIOCM_DTR)
1677 serial->dtr_state = 1;
1678
1679 if (clear & TIOCM_RTS)
1680 serial->rts_state = 0;
1681 if (clear & TIOCM_DTR)
1682 serial->dtr_state = 0;
1683
1684 if (serial->dtr_state)
1685 val |= 0x01;
1686 if (serial->rts_state)
1687 val |= 0x02;
1688
1689 spin_unlock_irqrestore(&serial->serial_lock, flags);
1690
1691 return usb_control_msg(serial->parent->usb,
1692 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1693 0x21, val, if_num, NULL, 0,
1694 USB_CTRL_SET_TIMEOUT);
1695}
1696
1697static int hso_serial_ioctl(struct tty_struct *tty,
1698 unsigned int cmd, unsigned long arg)
1699{
1700 struct hso_serial *serial = tty->driver_data;
1701 int ret = 0;
1702 hso_dbg(0x8, "IOCTL cmd: %d, arg: %ld\n", cmd, arg);
1703
1704 if (!serial)
1705 return -ENODEV;
1706 switch (cmd) {
1707 case TIOCMIWAIT:
1708 ret = hso_wait_modem_status(serial, arg);
1709 break;
1710 default:
1711 ret = -ENOIOCTLCMD;
1712 break;
1713 }
1714 return ret;
1715}
1716
1717
1718/* starts a transmit */
1719static void hso_kick_transmit(struct hso_serial *serial)
1720{
1721 unsigned long flags;
1722 int res;
1723
1724 spin_lock_irqsave(&serial->serial_lock, flags);
1725 if (!serial->tx_buffer_count)
1726 goto out;
1727
1728 if (serial->tx_urb_used)
1729 goto out;
1730
1731 /* Wakeup USB interface if necessary */
1732 if (hso_get_activity(serial->parent) == -EAGAIN)
1733 goto out;
1734
1735 /* Switch pointers around to avoid memcpy */
1736 swap(serial->tx_buffer, serial->tx_data);
1737 serial->tx_data_count = serial->tx_buffer_count;
1738 serial->tx_buffer_count = 0;
1739
1740 /* If serial->tx_data is set, it means we switched buffers */
1741 if (serial->tx_data && serial->write_data) {
1742 res = serial->write_data(serial);
1743 if (res >= 0)
1744 serial->tx_urb_used = 1;
1745 }
1746out:
1747 spin_unlock_irqrestore(&serial->serial_lock, flags);
1748}
1749
1750/* make a request (for reading and writing data to muxed serial port) */
1751static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1752 struct urb *ctrl_urb,
1753 struct usb_ctrlrequest *ctrl_req,
1754 u8 *ctrl_urb_data, u32 size)
1755{
1756 int result;
1757 int pipe;
1758
1759 /* Sanity check */
1760 if (!serial || !ctrl_urb || !ctrl_req) {
1761 pr_err("%s: Wrong arguments\n", __func__);
1762 return -EINVAL;
1763 }
1764
1765 /* initialize */
1766 ctrl_req->wValue = 0;
1767 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1768 ctrl_req->wLength = cpu_to_le16(size);
1769
1770 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1771 /* Reading command */
1772 ctrl_req->bRequestType = USB_DIR_IN |
1773 USB_TYPE_OPTION_VENDOR |
1774 USB_RECIP_INTERFACE;
1775 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1776 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1777 } else {
1778 /* Writing command */
1779 ctrl_req->bRequestType = USB_DIR_OUT |
1780 USB_TYPE_OPTION_VENDOR |
1781 USB_RECIP_INTERFACE;
1782 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1783 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1784 }
1785 /* syslog */
1786 hso_dbg(0x2, "%s command (%02x) len: %d, port: %d\n",
1787 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1788 ctrl_req->bRequestType, ctrl_req->wLength, port);
1789
1790 /* Load ctrl urb */
1791 ctrl_urb->transfer_flags = 0;
1792 usb_fill_control_urb(ctrl_urb,
1793 serial->parent->usb,
1794 pipe,
1795 (u8 *) ctrl_req,
1796 ctrl_urb_data, size, ctrl_callback, serial);
1797 /* Send it on merry way */
1798 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1799 if (result) {
1800 dev_err(&ctrl_urb->dev->dev,
1801 "%s failed submit ctrl_urb %d type %d\n", __func__,
1802 result, type);
1803 return result;
1804 }
1805
1806 /* done */
1807 return size;
1808}
1809
1810/* called by intr_callback when read occurs */
1811static int hso_mux_serial_read(struct hso_serial *serial)
1812{
1813 if (!serial)
1814 return -EINVAL;
1815
1816 /* clean data */
1817 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1818 /* make the request */
1819
1820 if (serial->num_rx_urbs != 1) {
1821 dev_err(&serial->parent->interface->dev,
1822 "ERROR: mux'd reads with multiple buffers "
1823 "not possible\n");
1824 return 0;
1825 }
1826 return mux_device_request(serial,
1827 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1828 serial->parent->port_spec & HSO_PORT_MASK,
1829 serial->rx_urb[0],
1830 &serial->ctrl_req_rx,
1831 serial->rx_data[0], serial->rx_data_length);
1832}
1833
1834/* used for muxed serial port callback (muxed serial read) */
1835static void intr_callback(struct urb *urb)
1836{
1837 struct hso_shared_int *shared_int = urb->context;
1838 struct hso_serial *serial;
1839 unsigned char *port_req;
1840 int status = urb->status;
1841 unsigned long flags;
1842 int i;
1843
1844 usb_mark_last_busy(urb->dev);
1845
1846 /* sanity check */
1847 if (!shared_int)
1848 return;
1849
1850 /* status check */
1851 if (status) {
1852 handle_usb_error(status, __func__, NULL);
1853 return;
1854 }
1855 hso_dbg(0x8, "--- Got intr callback 0x%02X ---\n", status);
1856
1857 /* what request? */
1858 port_req = urb->transfer_buffer;
1859 hso_dbg(0x8, "port_req = 0x%.2X\n", *port_req);
1860 /* loop over all muxed ports to find the one sending this */
1861 for (i = 0; i < 8; i++) {
1862 /* max 8 channels on MUX */
1863 if (*port_req & (1 << i)) {
1864 serial = get_serial_by_shared_int_and_type(shared_int,
1865 (1 << i));
1866 if (serial != NULL) {
1867 hso_dbg(0x1, "Pending read interrupt on port %d\n",
1868 i);
1869 spin_lock_irqsave(&serial->serial_lock, flags);
1870 if (serial->rx_state == RX_IDLE &&
1871 serial->port.count > 0) {
1872 /* Setup and send a ctrl req read on
1873 * port i */
1874 if (!serial->rx_urb_filled[0]) {
1875 serial->rx_state = RX_SENT;
1876 hso_mux_serial_read(serial);
1877 } else
1878 serial->rx_state = RX_PENDING;
1879 } else {
1880 hso_dbg(0x1, "Already a read pending on port %d or port not open\n",
1881 i);
1882 }
1883 spin_unlock_irqrestore(&serial->serial_lock,
1884 flags);
1885 }
1886 }
1887 }
1888 /* Resubmit interrupt urb */
1889 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1890}
1891
1892/* called for writing to muxed serial port */
1893static int hso_mux_serial_write_data(struct hso_serial *serial)
1894{
1895 if (NULL == serial)
1896 return -EINVAL;
1897
1898 return mux_device_request(serial,
1899 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1900 serial->parent->port_spec & HSO_PORT_MASK,
1901 serial->tx_urb,
1902 &serial->ctrl_req_tx,
1903 serial->tx_data, serial->tx_data_count);
1904}
1905
1906/* write callback for Diag and CS port */
1907static void hso_std_serial_write_bulk_callback(struct urb *urb)
1908{
1909 struct hso_serial *serial = urb->context;
1910 int status = urb->status;
1911 unsigned long flags;
1912
1913 /* sanity check */
1914 if (!serial) {
1915 hso_dbg(0x1, "serial == NULL\n");
1916 return;
1917 }
1918
1919 spin_lock_irqsave(&serial->serial_lock, flags);
1920 serial->tx_urb_used = 0;
1921 spin_unlock_irqrestore(&serial->serial_lock, flags);
1922 if (status) {
1923 handle_usb_error(status, __func__, serial->parent);
1924 return;
1925 }
1926 hso_put_activity(serial->parent);
1927 tty_port_tty_wakeup(&serial->port);
1928 hso_kick_transmit(serial);
1929
1930 hso_dbg(0x1, "\n");
1931}
1932
1933/* called for writing diag or CS serial port */
1934static int hso_std_serial_write_data(struct hso_serial *serial)
1935{
1936 int count = serial->tx_data_count;
1937 int result;
1938
1939 usb_fill_bulk_urb(serial->tx_urb,
1940 serial->parent->usb,
1941 usb_sndbulkpipe(serial->parent->usb,
1942 serial->out_endp->
1943 bEndpointAddress & 0x7F),
1944 serial->tx_data, serial->tx_data_count,
1945 hso_std_serial_write_bulk_callback, serial);
1946
1947 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1948 if (result) {
1949 dev_warn(&serial->parent->usb->dev,
1950 "Failed to submit urb - res %d\n", result);
1951 return result;
1952 }
1953
1954 return count;
1955}
1956
1957/* callback after read or write on muxed serial port */
1958static void ctrl_callback(struct urb *urb)
1959{
1960 struct hso_serial *serial = urb->context;
1961 struct usb_ctrlrequest *req;
1962 int status = urb->status;
1963 unsigned long flags;
1964
1965 /* sanity check */
1966 if (!serial)
1967 return;
1968
1969 spin_lock_irqsave(&serial->serial_lock, flags);
1970 serial->tx_urb_used = 0;
1971 spin_unlock_irqrestore(&serial->serial_lock, flags);
1972 if (status) {
1973 handle_usb_error(status, __func__, serial->parent);
1974 return;
1975 }
1976
1977 /* what request? */
1978 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1979 hso_dbg(0x8, "--- Got muxed ctrl callback 0x%02X ---\n", status);
1980 hso_dbg(0x8, "Actual length of urb = %d\n", urb->actual_length);
1981 DUMP1(urb->transfer_buffer, urb->actual_length);
1982
1983 if (req->bRequestType ==
1984 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
1985 /* response to a read command */
1986 serial->rx_urb_filled[0] = 1;
1987 spin_lock_irqsave(&serial->serial_lock, flags);
1988 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1989 spin_unlock_irqrestore(&serial->serial_lock, flags);
1990 } else {
1991 hso_put_activity(serial->parent);
1992 tty_port_tty_wakeup(&serial->port);
1993 /* response to a write command */
1994 hso_kick_transmit(serial);
1995 }
1996}
1997
1998/* handle RX data for serial port */
1999static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2000{
2001 struct tty_struct *tty;
2002 int count;
2003
2004 /* Sanity check */
2005 if (urb == NULL || serial == NULL) {
2006 hso_dbg(0x1, "serial = NULL\n");
2007 return -2;
2008 }
2009
2010 tty = tty_port_tty_get(&serial->port);
2011
2012 if (tty && tty_throttled(tty)) {
2013 tty_kref_put(tty);
2014 return -1;
2015 }
2016
2017 /* Push data to tty */
2018 hso_dbg(0x1, "data to push to tty\n");
2019 count = tty_buffer_request_room(&serial->port, urb->actual_length);
2020 if (count >= urb->actual_length) {
2021 tty_insert_flip_string(&serial->port, urb->transfer_buffer,
2022 urb->actual_length);
2023 tty_flip_buffer_push(&serial->port);
2024 } else {
2025 dev_warn(&serial->parent->usb->dev,
2026 "dropping data, %d bytes lost\n", urb->actual_length);
2027 }
2028
2029 tty_kref_put(tty);
2030
2031 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2032
2033 return 0;
2034}
2035
2036
2037/* Base driver functions */
2038
2039static void hso_log_port(struct hso_device *hso_dev)
2040{
2041 char *port_type;
2042 char port_dev[20];
2043
2044 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2045 case HSO_PORT_CONTROL:
2046 port_type = "Control";
2047 break;
2048 case HSO_PORT_APP:
2049 port_type = "Application";
2050 break;
2051 case HSO_PORT_GPS:
2052 port_type = "GPS";
2053 break;
2054 case HSO_PORT_GPS_CONTROL:
2055 port_type = "GPS control";
2056 break;
2057 case HSO_PORT_APP2:
2058 port_type = "Application2";
2059 break;
2060 case HSO_PORT_PCSC:
2061 port_type = "PCSC";
2062 break;
2063 case HSO_PORT_DIAG:
2064 port_type = "Diagnostic";
2065 break;
2066 case HSO_PORT_DIAG2:
2067 port_type = "Diagnostic2";
2068 break;
2069 case HSO_PORT_MODEM:
2070 port_type = "Modem";
2071 break;
2072 case HSO_PORT_NETWORK:
2073 port_type = "Network";
2074 break;
2075 default:
2076 port_type = "Unknown";
2077 break;
2078 }
2079 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2080 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2081 } else
2082 sprintf(port_dev, "/dev/%s%d", tty_filename,
2083 dev2ser(hso_dev)->minor);
2084
2085 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2086 port_type, port_dev);
2087}
2088
2089static int hso_start_net_device(struct hso_device *hso_dev)
2090{
2091 int i, result = 0;
2092 struct hso_net *hso_net = dev2net(hso_dev);
2093
2094 if (!hso_net)
2095 return -ENODEV;
2096
2097 /* send URBs for all read buffers */
2098 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2099
2100 /* Prep a receive URB */
2101 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2102 hso_dev->usb,
2103 usb_rcvbulkpipe(hso_dev->usb,
2104 hso_net->in_endp->
2105 bEndpointAddress & 0x7F),
2106 hso_net->mux_bulk_rx_buf_pool[i],
2107 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2108 hso_net);
2109
2110 /* Put it out there so the device can send us stuff */
2111 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2112 GFP_NOIO);
2113 if (result)
2114 dev_warn(&hso_dev->usb->dev,
2115 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2116 i, result);
2117 }
2118
2119 return result;
2120}
2121
2122static int hso_stop_net_device(struct hso_device *hso_dev)
2123{
2124 int i;
2125 struct hso_net *hso_net = dev2net(hso_dev);
2126
2127 if (!hso_net)
2128 return -ENODEV;
2129
2130 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2131 if (hso_net->mux_bulk_rx_urb_pool[i])
2132 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2133
2134 }
2135 if (hso_net->mux_bulk_tx_urb)
2136 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2137
2138 return 0;
2139}
2140
2141static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2142{
2143 int i, result = 0;
2144 struct hso_serial *serial = dev2ser(hso_dev);
2145
2146 if (!serial)
2147 return -ENODEV;
2148
2149 /* If it is not the MUX port fill in and submit a bulk urb (already
2150 * allocated in hso_serial_start) */
2151 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2152 for (i = 0; i < serial->num_rx_urbs; i++) {
2153 usb_fill_bulk_urb(serial->rx_urb[i],
2154 serial->parent->usb,
2155 usb_rcvbulkpipe(serial->parent->usb,
2156 serial->in_endp->
2157 bEndpointAddress &
2158 0x7F),
2159 serial->rx_data[i],
2160 serial->rx_data_length,
2161 hso_std_serial_read_bulk_callback,
2162 serial);
2163 result = usb_submit_urb(serial->rx_urb[i], flags);
2164 if (result) {
2165 dev_warn(&serial->parent->usb->dev,
2166 "Failed to submit urb - res %d\n",
2167 result);
2168 break;
2169 }
2170 }
2171 } else {
2172 mutex_lock(&serial->shared_int->shared_int_lock);
2173 if (!serial->shared_int->use_count) {
2174 result =
2175 hso_mux_submit_intr_urb(serial->shared_int,
2176 hso_dev->usb, flags);
2177 }
2178 serial->shared_int->use_count++;
2179 mutex_unlock(&serial->shared_int->shared_int_lock);
2180 }
2181 if (serial->tiocmget)
2182 tiocmget_submit_urb(serial,
2183 serial->tiocmget,
2184 serial->parent->usb);
2185 return result;
2186}
2187
2188static int hso_stop_serial_device(struct hso_device *hso_dev)
2189{
2190 int i;
2191 struct hso_serial *serial = dev2ser(hso_dev);
2192 struct hso_tiocmget *tiocmget;
2193
2194 if (!serial)
2195 return -ENODEV;
2196
2197 for (i = 0; i < serial->num_rx_urbs; i++) {
2198 if (serial->rx_urb[i]) {
2199 usb_kill_urb(serial->rx_urb[i]);
2200 serial->rx_urb_filled[i] = 0;
2201 }
2202 }
2203 serial->curr_rx_urb_idx = 0;
2204
2205 if (serial->tx_urb)
2206 usb_kill_urb(serial->tx_urb);
2207
2208 if (serial->shared_int) {
2209 mutex_lock(&serial->shared_int->shared_int_lock);
2210 if (serial->shared_int->use_count &&
2211 (--serial->shared_int->use_count == 0)) {
2212 struct urb *urb;
2213
2214 urb = serial->shared_int->shared_intr_urb;
2215 if (urb)
2216 usb_kill_urb(urb);
2217 }
2218 mutex_unlock(&serial->shared_int->shared_int_lock);
2219 }
2220 tiocmget = serial->tiocmget;
2221 if (tiocmget) {
2222 wake_up_interruptible(&tiocmget->waitq);
2223 usb_kill_urb(tiocmget->urb);
2224 }
2225
2226 return 0;
2227}
2228
2229static void hso_serial_tty_unregister(struct hso_serial *serial)
2230{
2231 tty_unregister_device(tty_drv, serial->minor);
2232}
2233
2234static void hso_serial_common_free(struct hso_serial *serial)
2235{
2236 int i;
2237
2238 for (i = 0; i < serial->num_rx_urbs; i++) {
2239 /* unlink and free RX URB */
2240 usb_free_urb(serial->rx_urb[i]);
2241 /* free the RX buffer */
2242 kfree(serial->rx_data[i]);
2243 }
2244
2245 /* unlink and free TX URB */
2246 usb_free_urb(serial->tx_urb);
2247 kfree(serial->tx_buffer);
2248 kfree(serial->tx_data);
2249 tty_port_destroy(&serial->port);
2250}
2251
2252static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2253 int rx_size, int tx_size)
2254{
2255 int minor;
2256 int i;
2257
2258 tty_port_init(&serial->port);
2259
2260 minor = get_free_serial_index();
2261 if (minor < 0)
2262 goto exit;
2263
2264 /* register our minor number */
2265 serial->parent->dev = tty_port_register_device_attr(&serial->port,
2266 tty_drv, minor, &serial->parent->interface->dev,
2267 serial->parent, hso_serial_dev_groups);
2268
2269 /* fill in specific data for later use */
2270 serial->minor = minor;
2271 serial->magic = HSO_SERIAL_MAGIC;
2272 spin_lock_init(&serial->serial_lock);
2273 serial->num_rx_urbs = num_urbs;
2274
2275 /* RX, allocate urb and initialize */
2276
2277 /* prepare our RX buffer */
2278 serial->rx_data_length = rx_size;
2279 for (i = 0; i < serial->num_rx_urbs; i++) {
2280 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2281 if (!serial->rx_urb[i])
2282 goto exit;
2283 serial->rx_urb[i]->transfer_buffer = NULL;
2284 serial->rx_urb[i]->transfer_buffer_length = 0;
2285 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2286 GFP_KERNEL);
2287 if (!serial->rx_data[i])
2288 goto exit;
2289 }
2290
2291 /* TX, allocate urb and initialize */
2292 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2293 if (!serial->tx_urb)
2294 goto exit;
2295 serial->tx_urb->transfer_buffer = NULL;
2296 serial->tx_urb->transfer_buffer_length = 0;
2297 /* prepare our TX buffer */
2298 serial->tx_data_count = 0;
2299 serial->tx_buffer_count = 0;
2300 serial->tx_data_length = tx_size;
2301 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2302 if (!serial->tx_data)
2303 goto exit;
2304
2305 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2306 if (!serial->tx_buffer)
2307 goto exit;
2308
2309 return 0;
2310exit:
2311 hso_serial_tty_unregister(serial);
2312 hso_serial_common_free(serial);
2313 return -1;
2314}
2315
2316/* Creates a general hso device */
2317static struct hso_device *hso_create_device(struct usb_interface *intf,
2318 int port_spec)
2319{
2320 struct hso_device *hso_dev;
2321
2322 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2323 if (!hso_dev)
2324 return NULL;
2325
2326 hso_dev->port_spec = port_spec;
2327 hso_dev->usb = interface_to_usbdev(intf);
2328 hso_dev->interface = intf;
2329 kref_init(&hso_dev->ref);
2330 mutex_init(&hso_dev->mutex);
2331
2332 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2333 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2334
2335 return hso_dev;
2336}
2337
2338/* Removes a network device in the network device table */
2339static int remove_net_device(struct hso_device *hso_dev)
2340{
2341 int i;
2342
2343 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2344 if (network_table[i] == hso_dev) {
2345 network_table[i] = NULL;
2346 break;
2347 }
2348 }
2349 if (i == HSO_MAX_NET_DEVICES)
2350 return -1;
2351 return 0;
2352}
2353
2354/* Frees our network device */
2355static void hso_free_net_device(struct hso_device *hso_dev)
2356{
2357 int i;
2358 struct hso_net *hso_net = dev2net(hso_dev);
2359
2360 if (!hso_net)
2361 return;
2362
2363 remove_net_device(hso_net->parent);
2364
2365 if (hso_net->net)
2366 unregister_netdev(hso_net->net);
2367
2368 /* start freeing */
2369 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2370 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2371 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2372 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2373 }
2374 usb_free_urb(hso_net->mux_bulk_tx_urb);
2375 kfree(hso_net->mux_bulk_tx_buf);
2376 hso_net->mux_bulk_tx_buf = NULL;
2377
2378 if (hso_net->net)
2379 free_netdev(hso_net->net);
2380
2381 kfree(hso_dev);
2382}
2383
2384static const struct net_device_ops hso_netdev_ops = {
2385 .ndo_open = hso_net_open,
2386 .ndo_stop = hso_net_close,
2387 .ndo_start_xmit = hso_net_start_xmit,
2388 .ndo_tx_timeout = hso_net_tx_timeout,
2389};
2390
2391/* initialize the network interface */
2392static void hso_net_init(struct net_device *net)
2393{
2394 struct hso_net *hso_net = netdev_priv(net);
2395
2396 hso_dbg(0x1, "sizeof hso_net is %zu\n", sizeof(*hso_net));
2397
2398 /* fill in the other fields */
2399 net->netdev_ops = &hso_netdev_ops;
2400 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2401 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2402 net->type = ARPHRD_NONE;
2403 net->mtu = DEFAULT_MTU - 14;
2404 net->tx_queue_len = 10;
2405 net->ethtool_ops = &ops;
2406
2407 /* and initialize the semaphore */
2408 spin_lock_init(&hso_net->net_lock);
2409}
2410
2411/* Adds a network device in the network device table */
2412static int add_net_device(struct hso_device *hso_dev)
2413{
2414 int i;
2415
2416 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2417 if (network_table[i] == NULL) {
2418 network_table[i] = hso_dev;
2419 break;
2420 }
2421 }
2422 if (i == HSO_MAX_NET_DEVICES)
2423 return -1;
2424 return 0;
2425}
2426
2427static int hso_rfkill_set_block(void *data, bool blocked)
2428{
2429 struct hso_device *hso_dev = data;
2430 int enabled = !blocked;
2431 int rv;
2432
2433 mutex_lock(&hso_dev->mutex);
2434 if (hso_dev->usb_gone)
2435 rv = 0;
2436 else
2437 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2438 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2439 USB_CTRL_SET_TIMEOUT);
2440 mutex_unlock(&hso_dev->mutex);
2441 return rv;
2442}
2443
2444static const struct rfkill_ops hso_rfkill_ops = {
2445 .set_block = hso_rfkill_set_block,
2446};
2447
2448/* Creates and sets up everything for rfkill */
2449static void hso_create_rfkill(struct hso_device *hso_dev,
2450 struct usb_interface *interface)
2451{
2452 struct hso_net *hso_net = dev2net(hso_dev);
2453 struct device *dev = &hso_net->net->dev;
2454 static u32 rfkill_counter;
2455
2456 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d",
2457 rfkill_counter++);
2458
2459 hso_net->rfkill = rfkill_alloc(hso_net->name,
2460 &interface_to_usbdev(interface)->dev,
2461 RFKILL_TYPE_WWAN,
2462 &hso_rfkill_ops, hso_dev);
2463 if (!hso_net->rfkill) {
2464 dev_err(dev, "%s - Out of memory\n", __func__);
2465 return;
2466 }
2467 if (rfkill_register(hso_net->rfkill) < 0) {
2468 rfkill_destroy(hso_net->rfkill);
2469 hso_net->rfkill = NULL;
2470 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2471 return;
2472 }
2473}
2474
2475static struct device_type hso_type = {
2476 .name = "wwan",
2477};
2478
2479/* Creates our network device */
2480static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2481 int port_spec)
2482{
2483 int result, i;
2484 struct net_device *net;
2485 struct hso_net *hso_net;
2486 struct hso_device *hso_dev;
2487
2488 hso_dev = hso_create_device(interface, port_spec);
2489 if (!hso_dev)
2490 return NULL;
2491
2492 /* allocate our network device, then we can put in our private data */
2493 /* call hso_net_init to do the basic initialization */
2494 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN,
2495 hso_net_init);
2496 if (!net) {
2497 dev_err(&interface->dev, "Unable to create ethernet device\n");
2498 goto exit;
2499 }
2500
2501 hso_net = netdev_priv(net);
2502
2503 hso_dev->port_data.dev_net = hso_net;
2504 hso_net->net = net;
2505 hso_net->parent = hso_dev;
2506
2507 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2508 USB_DIR_IN);
2509 if (!hso_net->in_endp) {
2510 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2511 goto exit;
2512 }
2513 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2514 USB_DIR_OUT);
2515 if (!hso_net->out_endp) {
2516 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2517 goto exit;
2518 }
2519 SET_NETDEV_DEV(net, &interface->dev);
2520 SET_NETDEV_DEVTYPE(net, &hso_type);
2521
2522 /* start allocating */
2523 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2524 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2525 if (!hso_net->mux_bulk_rx_urb_pool[i])
2526 goto exit;
2527 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2528 GFP_KERNEL);
2529 if (!hso_net->mux_bulk_rx_buf_pool[i])
2530 goto exit;
2531 }
2532 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2533 if (!hso_net->mux_bulk_tx_urb)
2534 goto exit;
2535 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2536 if (!hso_net->mux_bulk_tx_buf)
2537 goto exit;
2538
2539 add_net_device(hso_dev);
2540
2541 /* registering our net device */
2542 result = register_netdev(net);
2543 if (result) {
2544 dev_err(&interface->dev, "Failed to register device\n");
2545 goto exit;
2546 }
2547
2548 hso_log_port(hso_dev);
2549
2550 hso_create_rfkill(hso_dev, interface);
2551
2552 return hso_dev;
2553exit:
2554 hso_free_net_device(hso_dev);
2555 return NULL;
2556}
2557
2558static void hso_free_tiomget(struct hso_serial *serial)
2559{
2560 struct hso_tiocmget *tiocmget;
2561 if (!serial)
2562 return;
2563 tiocmget = serial->tiocmget;
2564 if (tiocmget) {
2565 usb_free_urb(tiocmget->urb);
2566 tiocmget->urb = NULL;
2567 serial->tiocmget = NULL;
2568 kfree(tiocmget->serial_state_notification);
2569 tiocmget->serial_state_notification = NULL;
2570 kfree(tiocmget);
2571 }
2572}
2573
2574/* Frees an AT channel ( goes for both mux and non-mux ) */
2575static void hso_free_serial_device(struct hso_device *hso_dev)
2576{
2577 struct hso_serial *serial = dev2ser(hso_dev);
2578
2579 if (!serial)
2580 return;
2581
2582 hso_serial_common_free(serial);
2583
2584 if (serial->shared_int) {
2585 mutex_lock(&serial->shared_int->shared_int_lock);
2586 if (--serial->shared_int->ref_count == 0)
2587 hso_free_shared_int(serial->shared_int);
2588 else
2589 mutex_unlock(&serial->shared_int->shared_int_lock);
2590 }
2591 hso_free_tiomget(serial);
2592 kfree(serial);
2593 kfree(hso_dev);
2594}
2595
2596/* Creates a bulk AT channel */
2597static struct hso_device *hso_create_bulk_serial_device(
2598 struct usb_interface *interface, int port)
2599{
2600 struct hso_device *hso_dev;
2601 struct hso_serial *serial;
2602 int num_urbs;
2603 struct hso_tiocmget *tiocmget;
2604
2605 hso_dev = hso_create_device(interface, port);
2606 if (!hso_dev)
2607 return NULL;
2608
2609 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2610 if (!serial)
2611 goto exit;
2612
2613 serial->parent = hso_dev;
2614 hso_dev->port_data.dev_serial = serial;
2615
2616 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2617 num_urbs = 2;
2618 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2619 GFP_KERNEL);
2620 serial->tiocmget->serial_state_notification
2621 = kzalloc(sizeof(struct hso_serial_state_notification),
2622 GFP_KERNEL);
2623 /* it isn't going to break our heart if serial->tiocmget
2624 * allocation fails don't bother checking this.
2625 */
2626 if (serial->tiocmget && serial->tiocmget->serial_state_notification) {
2627 tiocmget = serial->tiocmget;
2628 tiocmget->endp = hso_get_ep(interface,
2629 USB_ENDPOINT_XFER_INT,
2630 USB_DIR_IN);
2631 if (!tiocmget->endp) {
2632 dev_err(&interface->dev, "Failed to find INT IN ep\n");
2633 goto exit;
2634 }
2635
2636 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2637 if (tiocmget->urb) {
2638 mutex_init(&tiocmget->mutex);
2639 init_waitqueue_head(&tiocmget->waitq);
2640 } else
2641 hso_free_tiomget(serial);
2642 }
2643 }
2644 else
2645 num_urbs = 1;
2646
2647 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2648 BULK_URB_TX_SIZE))
2649 goto exit;
2650
2651 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2652 USB_DIR_IN);
2653 if (!serial->in_endp) {
2654 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2655 goto exit2;
2656 }
2657
2658 if (!
2659 (serial->out_endp =
2660 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2661 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2662 goto exit2;
2663 }
2664
2665 serial->write_data = hso_std_serial_write_data;
2666
2667 /* and record this serial */
2668 set_serial_by_index(serial->minor, serial);
2669
2670 /* setup the proc dirs and files if needed */
2671 hso_log_port(hso_dev);
2672
2673 /* done, return it */
2674 return hso_dev;
2675
2676exit2:
2677 hso_serial_tty_unregister(serial);
2678 hso_serial_common_free(serial);
2679exit:
2680 hso_free_tiomget(serial);
2681 kfree(serial);
2682 kfree(hso_dev);
2683 return NULL;
2684}
2685
2686/* Creates a multiplexed AT channel */
2687static
2688struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2689 int port,
2690 struct hso_shared_int *mux)
2691{
2692 struct hso_device *hso_dev;
2693 struct hso_serial *serial;
2694 int port_spec;
2695
2696 port_spec = HSO_INTF_MUX;
2697 port_spec &= ~HSO_PORT_MASK;
2698
2699 port_spec |= hso_mux_to_port(port);
2700 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2701 return NULL;
2702
2703 hso_dev = hso_create_device(interface, port_spec);
2704 if (!hso_dev)
2705 return NULL;
2706
2707 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2708 if (!serial)
2709 goto exit;
2710
2711 hso_dev->port_data.dev_serial = serial;
2712 serial->parent = hso_dev;
2713
2714 if (hso_serial_common_create
2715 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2716 goto exit;
2717
2718 serial->tx_data_length--;
2719 serial->write_data = hso_mux_serial_write_data;
2720
2721 serial->shared_int = mux;
2722 mutex_lock(&serial->shared_int->shared_int_lock);
2723 serial->shared_int->ref_count++;
2724 mutex_unlock(&serial->shared_int->shared_int_lock);
2725
2726 /* and record this serial */
2727 set_serial_by_index(serial->minor, serial);
2728
2729 /* setup the proc dirs and files if needed */
2730 hso_log_port(hso_dev);
2731
2732 /* done, return it */
2733 return hso_dev;
2734
2735exit:
2736 if (serial) {
2737 tty_unregister_device(tty_drv, serial->minor);
2738 kfree(serial);
2739 }
2740 kfree(hso_dev);
2741 return NULL;
2742
2743}
2744
2745static void hso_free_shared_int(struct hso_shared_int *mux)
2746{
2747 usb_free_urb(mux->shared_intr_urb);
2748 kfree(mux->shared_intr_buf);
2749 mutex_unlock(&mux->shared_int_lock);
2750 kfree(mux);
2751}
2752
2753static
2754struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2755{
2756 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2757
2758 if (!mux)
2759 return NULL;
2760
2761 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2762 USB_DIR_IN);
2763 if (!mux->intr_endp) {
2764 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2765 goto exit;
2766 }
2767
2768 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2769 if (!mux->shared_intr_urb)
2770 goto exit;
2771 mux->shared_intr_buf =
2772 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2773 GFP_KERNEL);
2774 if (!mux->shared_intr_buf)
2775 goto exit;
2776
2777 mutex_init(&mux->shared_int_lock);
2778
2779 return mux;
2780
2781exit:
2782 kfree(mux->shared_intr_buf);
2783 usb_free_urb(mux->shared_intr_urb);
2784 kfree(mux);
2785 return NULL;
2786}
2787
2788/* Gets the port spec for a certain interface */
2789static int hso_get_config_data(struct usb_interface *interface)
2790{
2791 struct usb_device *usbdev = interface_to_usbdev(interface);
2792 u8 *config_data = kmalloc(17, GFP_KERNEL);
2793 u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2794 s32 result;
2795
2796 if (!config_data)
2797 return -ENOMEM;
2798 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2799 0x86, 0xC0, 0, 0, config_data, 17,
2800 USB_CTRL_SET_TIMEOUT) != 0x11) {
2801 kfree(config_data);
2802 return -EIO;
2803 }
2804
2805 /* check if we have a valid interface */
2806 if (if_num > 16) {
2807 kfree(config_data);
2808 return -EINVAL;
2809 }
2810
2811 switch (config_data[if_num]) {
2812 case 0x0:
2813 result = 0;
2814 break;
2815 case 0x1:
2816 result = HSO_PORT_DIAG;
2817 break;
2818 case 0x2:
2819 result = HSO_PORT_GPS;
2820 break;
2821 case 0x3:
2822 result = HSO_PORT_GPS_CONTROL;
2823 break;
2824 case 0x4:
2825 result = HSO_PORT_APP;
2826 break;
2827 case 0x5:
2828 result = HSO_PORT_APP2;
2829 break;
2830 case 0x6:
2831 result = HSO_PORT_CONTROL;
2832 break;
2833 case 0x7:
2834 result = HSO_PORT_NETWORK;
2835 break;
2836 case 0x8:
2837 result = HSO_PORT_MODEM;
2838 break;
2839 case 0x9:
2840 result = HSO_PORT_MSD;
2841 break;
2842 case 0xa:
2843 result = HSO_PORT_PCSC;
2844 break;
2845 case 0xb:
2846 result = HSO_PORT_VOICE;
2847 break;
2848 default:
2849 result = 0;
2850 }
2851
2852 if (result)
2853 result |= HSO_INTF_BULK;
2854
2855 if (config_data[16] & 0x1)
2856 result |= HSO_INFO_CRC_BUG;
2857
2858 kfree(config_data);
2859 return result;
2860}
2861
2862/* called once for each interface upon device insertion */
2863static int hso_probe(struct usb_interface *interface,
2864 const struct usb_device_id *id)
2865{
2866 int mux, i, if_num, port_spec;
2867 unsigned char port_mask;
2868 struct hso_device *hso_dev = NULL;
2869 struct hso_shared_int *shared_int;
2870 struct hso_device *tmp_dev = NULL;
2871
2872 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2873 dev_err(&interface->dev, "Not our interface\n");
2874 return -ENODEV;
2875 }
2876
2877 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2878
2879 /* Get the interface/port specification from either driver_info or from
2880 * the device itself */
2881 if (id->driver_info) {
2882 /* if_num is controlled by the device, driver_info is a 0 terminated
2883 * array. Make sure, the access is in bounds! */
2884 for (i = 0; i <= if_num; ++i)
2885 if (((u32 *)(id->driver_info))[i] == 0)
2886 goto exit;
2887 port_spec = ((u32 *)(id->driver_info))[if_num];
2888 } else {
2889 port_spec = hso_get_config_data(interface);
2890 if (port_spec < 0)
2891 goto exit;
2892 }
2893
2894 /* Check if we need to switch to alt interfaces prior to port
2895 * configuration */
2896 if (interface->num_altsetting > 1)
2897 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2898 interface->needs_remote_wakeup = 1;
2899
2900 /* Allocate new hso device(s) */
2901 switch (port_spec & HSO_INTF_MASK) {
2902 case HSO_INTF_MUX:
2903 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2904 /* Create the network device */
2905 if (!disable_net) {
2906 hso_dev = hso_create_net_device(interface,
2907 port_spec);
2908 if (!hso_dev)
2909 goto exit;
2910 tmp_dev = hso_dev;
2911 }
2912 }
2913
2914 if (hso_get_mux_ports(interface, &port_mask))
2915 /* TODO: de-allocate everything */
2916 goto exit;
2917
2918 shared_int = hso_create_shared_int(interface);
2919 if (!shared_int)
2920 goto exit;
2921
2922 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2923 if (port_mask & i) {
2924 hso_dev = hso_create_mux_serial_device(
2925 interface, i, shared_int);
2926 if (!hso_dev)
2927 goto exit;
2928 }
2929 }
2930
2931 if (tmp_dev)
2932 hso_dev = tmp_dev;
2933 break;
2934
2935 case HSO_INTF_BULK:
2936 /* It's a regular bulk interface */
2937 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2938 if (!disable_net)
2939 hso_dev =
2940 hso_create_net_device(interface, port_spec);
2941 } else {
2942 hso_dev =
2943 hso_create_bulk_serial_device(interface, port_spec);
2944 }
2945 if (!hso_dev)
2946 goto exit;
2947 break;
2948 default:
2949 goto exit;
2950 }
2951
2952 /* save our data pointer in this device */
2953 usb_set_intfdata(interface, hso_dev);
2954
2955 /* done */
2956 return 0;
2957exit:
2958 hso_free_interface(interface);
2959 return -ENODEV;
2960}
2961
2962/* device removed, cleaning up */
2963static void hso_disconnect(struct usb_interface *interface)
2964{
2965 hso_free_interface(interface);
2966
2967 /* remove reference of our private data */
2968 usb_set_intfdata(interface, NULL);
2969}
2970
2971static void async_get_intf(struct work_struct *data)
2972{
2973 struct hso_device *hso_dev =
2974 container_of(data, struct hso_device, async_get_intf);
2975 usb_autopm_get_interface(hso_dev->interface);
2976}
2977
2978static void async_put_intf(struct work_struct *data)
2979{
2980 struct hso_device *hso_dev =
2981 container_of(data, struct hso_device, async_put_intf);
2982 usb_autopm_put_interface(hso_dev->interface);
2983}
2984
2985static int hso_get_activity(struct hso_device *hso_dev)
2986{
2987 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2988 if (!hso_dev->is_active) {
2989 hso_dev->is_active = 1;
2990 schedule_work(&hso_dev->async_get_intf);
2991 }
2992 }
2993
2994 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
2995 return -EAGAIN;
2996
2997 usb_mark_last_busy(hso_dev->usb);
2998
2999 return 0;
3000}
3001
3002static int hso_put_activity(struct hso_device *hso_dev)
3003{
3004 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3005 if (hso_dev->is_active) {
3006 hso_dev->is_active = 0;
3007 schedule_work(&hso_dev->async_put_intf);
3008 return -EAGAIN;
3009 }
3010 }
3011 hso_dev->is_active = 0;
3012 return 0;
3013}
3014
3015/* called by kernel when we need to suspend device */
3016static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3017{
3018 int i, result;
3019
3020 /* Stop all serial ports */
3021 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3022 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3023 result = hso_stop_serial_device(serial_table[i]);
3024 if (result)
3025 goto out;
3026 }
3027 }
3028
3029 /* Stop all network ports */
3030 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3031 if (network_table[i] &&
3032 (network_table[i]->interface == iface)) {
3033 result = hso_stop_net_device(network_table[i]);
3034 if (result)
3035 goto out;
3036 }
3037 }
3038
3039out:
3040 return 0;
3041}
3042
3043/* called by kernel when we need to resume device */
3044static int hso_resume(struct usb_interface *iface)
3045{
3046 int i, result = 0;
3047 struct hso_net *hso_net;
3048
3049 /* Start all serial ports */
3050 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3051 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3052 if (dev2ser(serial_table[i])->port.count) {
3053 result =
3054 hso_start_serial_device(serial_table[i], GFP_NOIO);
3055 hso_kick_transmit(dev2ser(serial_table[i]));
3056 if (result)
3057 goto out;
3058 }
3059 }
3060 }
3061
3062 /* Start all network ports */
3063 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3064 if (network_table[i] &&
3065 (network_table[i]->interface == iface)) {
3066 hso_net = dev2net(network_table[i]);
3067 if (hso_net->flags & IFF_UP) {
3068 /* First transmit any lingering data,
3069 then restart the device. */
3070 if (hso_net->skb_tx_buf) {
3071 dev_dbg(&iface->dev,
3072 "Transmitting"
3073 " lingering data\n");
3074 hso_net_start_xmit(hso_net->skb_tx_buf,
3075 hso_net->net);
3076 hso_net->skb_tx_buf = NULL;
3077 }
3078 result = hso_start_net_device(network_table[i]);
3079 if (result)
3080 goto out;
3081 }
3082 }
3083 }
3084
3085out:
3086 return result;
3087}
3088
3089static void hso_serial_ref_free(struct kref *ref)
3090{
3091 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3092
3093 hso_free_serial_device(hso_dev);
3094}
3095
3096static void hso_free_interface(struct usb_interface *interface)
3097{
3098 struct hso_serial *serial;
3099 int i;
3100
3101 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3102 if (serial_table[i] &&
3103 (serial_table[i]->interface == interface)) {
3104 serial = dev2ser(serial_table[i]);
3105 tty_port_tty_hangup(&serial->port, false);
3106 mutex_lock(&serial->parent->mutex);
3107 serial->parent->usb_gone = 1;
3108 mutex_unlock(&serial->parent->mutex);
3109 cancel_work_sync(&serial_table[i]->async_put_intf);
3110 cancel_work_sync(&serial_table[i]->async_get_intf);
3111 hso_serial_tty_unregister(serial);
3112 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3113 set_serial_by_index(i, NULL);
3114 }
3115 }
3116
3117 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3118 if (network_table[i] &&
3119 (network_table[i]->interface == interface)) {
3120 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3121 /* hso_stop_net_device doesn't stop the net queue since
3122 * traffic needs to start it again when suspended */
3123 netif_stop_queue(dev2net(network_table[i])->net);
3124 hso_stop_net_device(network_table[i]);
3125 cancel_work_sync(&network_table[i]->async_put_intf);
3126 cancel_work_sync(&network_table[i]->async_get_intf);
3127 if (rfk) {
3128 rfkill_unregister(rfk);
3129 rfkill_destroy(rfk);
3130 }
3131 hso_free_net_device(network_table[i]);
3132 }
3133 }
3134}
3135
3136/* Helper functions */
3137
3138/* Get the endpoint ! */
3139static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3140 int type, int dir)
3141{
3142 int i;
3143 struct usb_host_interface *iface = intf->cur_altsetting;
3144 struct usb_endpoint_descriptor *endp;
3145
3146 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3147 endp = &iface->endpoint[i].desc;
3148 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3149 (usb_endpoint_type(endp) == type))
3150 return endp;
3151 }
3152
3153 return NULL;
3154}
3155
3156/* Get the byte that describes which ports are enabled */
3157static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3158{
3159 int i;
3160 struct usb_host_interface *iface = intf->cur_altsetting;
3161
3162 if (iface->extralen == 3) {
3163 *ports = iface->extra[2];
3164 return 0;
3165 }
3166
3167 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3168 if (iface->endpoint[i].extralen == 3) {
3169 *ports = iface->endpoint[i].extra[2];
3170 return 0;
3171 }
3172 }
3173
3174 return -1;
3175}
3176
3177/* interrupt urb needs to be submitted, used for serial read of muxed port */
3178static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3179 struct usb_device *usb, gfp_t gfp)
3180{
3181 int result;
3182
3183 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3184 usb_rcvintpipe(usb,
3185 shared_int->intr_endp->bEndpointAddress & 0x7F),
3186 shared_int->shared_intr_buf,
3187 1,
3188 intr_callback, shared_int,
3189 shared_int->intr_endp->bInterval);
3190
3191 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3192 if (result)
3193 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3194 result);
3195
3196 return result;
3197}
3198
3199/* operations setup of the serial interface */
3200static const struct tty_operations hso_serial_ops = {
3201 .open = hso_serial_open,
3202 .close = hso_serial_close,
3203 .write = hso_serial_write,
3204 .write_room = hso_serial_write_room,
3205 .cleanup = hso_serial_cleanup,
3206 .ioctl = hso_serial_ioctl,
3207 .set_termios = hso_serial_set_termios,
3208 .chars_in_buffer = hso_serial_chars_in_buffer,
3209 .tiocmget = hso_serial_tiocmget,
3210 .tiocmset = hso_serial_tiocmset,
3211 .get_icount = hso_get_count,
3212 .unthrottle = hso_unthrottle
3213};
3214
3215static struct usb_driver hso_driver = {
3216 .name = driver_name,
3217 .probe = hso_probe,
3218 .disconnect = hso_disconnect,
3219 .id_table = hso_ids,
3220 .suspend = hso_suspend,
3221 .resume = hso_resume,
3222 .reset_resume = hso_resume,
3223 .supports_autosuspend = 1,
3224 .disable_hub_initiated_lpm = 1,
3225};
3226
3227static int __init hso_init(void)
3228{
3229 int i;
3230 int result;
3231
3232 /* put it in the log */
3233 pr_info("%s\n", version);
3234
3235 /* Initialise the serial table semaphore and table */
3236 spin_lock_init(&serial_table_lock);
3237 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3238 serial_table[i] = NULL;
3239
3240 /* allocate our driver using the proper amount of supported minors */
3241 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3242 if (!tty_drv)
3243 return -ENOMEM;
3244
3245 /* fill in all needed values */
3246 tty_drv->driver_name = driver_name;
3247 tty_drv->name = tty_filename;
3248
3249 /* if major number is provided as parameter, use that one */
3250 if (tty_major)
3251 tty_drv->major = tty_major;
3252
3253 tty_drv->minor_start = 0;
3254 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3255 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3256 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3257 tty_drv->init_termios = tty_std_termios;
3258 hso_init_termios(&tty_drv->init_termios);
3259 tty_set_operations(tty_drv, &hso_serial_ops);
3260
3261 /* register the tty driver */
3262 result = tty_register_driver(tty_drv);
3263 if (result) {
3264 pr_err("%s - tty_register_driver failed(%d)\n",
3265 __func__, result);
3266 goto err_free_tty;
3267 }
3268
3269 /* register this module as an usb driver */
3270 result = usb_register(&hso_driver);
3271 if (result) {
3272 pr_err("Could not register hso driver - error: %d\n", result);
3273 goto err_unreg_tty;
3274 }
3275
3276 /* done */
3277 return 0;
3278err_unreg_tty:
3279 tty_unregister_driver(tty_drv);
3280err_free_tty:
3281 put_tty_driver(tty_drv);
3282 return result;
3283}
3284
3285static void __exit hso_exit(void)
3286{
3287 pr_info("unloaded\n");
3288
3289 tty_unregister_driver(tty_drv);
3290 /* deregister the usb driver */
3291 usb_deregister(&hso_driver);
3292 put_tty_driver(tty_drv);
3293}
3294
3295/* Module definitions */
3296module_init(hso_init);
3297module_exit(hso_exit);
3298
3299MODULE_AUTHOR(MOD_AUTHOR);
3300MODULE_DESCRIPTION(MOD_DESCRIPTION);
3301MODULE_LICENSE("GPL");
3302
3303/* change the debug level (eg: insmod hso.ko debug=0x04) */
3304MODULE_PARM_DESC(debug, "debug level mask [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3305module_param(debug, int, 0644);
3306
3307/* set the major tty number (eg: insmod hso.ko tty_major=245) */
3308MODULE_PARM_DESC(tty_major, "Set the major tty number");
3309module_param(tty_major, int, 0644);
3310
3311/* disable network interface (eg: insmod hso.ko disable_net=1) */
3312MODULE_PARM_DESC(disable_net, "Disable the network interface");
3313module_param(disable_net, int, 0644);