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Merge tag 'io_uring-5.7-2020-05-22' of git://git.kernel.dk/linux-block
[thirdparty/linux.git] / drivers / net / usb / hso.c
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, ...) \
99 do { \
100 if ((lvl) & debug) \
101 pr_info("[%d:%s] " fmt, \
102 __LINE__, __func__, ##__VA_ARGS__); \
103 } while (0)
104
105 /*****************************************************************************/
106 /* Enumerators */
107 /*****************************************************************************/
108 enum pkt_parse_state {
109 WAIT_IP,
110 WAIT_DATA,
111 WAIT_SYNC
112 };
113
114 /*****************************************************************************/
115 /* Structs */
116 /*****************************************************************************/
117
118 struct 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
128 struct 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
155 enum 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
174 struct 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
183 struct 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
195 struct 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
241 struct 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 */
291 static int hso_serial_tiocmset(struct tty_struct *tty,
292 unsigned int set, unsigned int clear);
293 static void ctrl_callback(struct urb *urb);
294 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
295 static void hso_kick_transmit(struct hso_serial *serial);
296 /* Helper functions */
297 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
298 struct usb_device *usb, gfp_t gfp);
299 static void handle_usb_error(int status, const char *function,
300 struct hso_device *hso_dev);
301 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
302 int type, int dir);
303 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
304 static void hso_free_interface(struct usb_interface *intf);
305 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
306 static int hso_stop_serial_device(struct hso_device *hso_dev);
307 static int hso_start_net_device(struct hso_device *hso_dev);
308 static void hso_free_shared_int(struct hso_shared_int *shared_int);
309 static int hso_stop_net_device(struct hso_device *hso_dev);
310 static void hso_serial_ref_free(struct kref *ref);
311 static void hso_std_serial_read_bulk_callback(struct urb *urb);
312 static int hso_mux_serial_read(struct hso_serial *serial);
313 static void async_get_intf(struct work_struct *data);
314 static void async_put_intf(struct work_struct *data);
315 static int hso_put_activity(struct hso_device *hso_dev);
316 static int hso_get_activity(struct hso_device *hso_dev);
317 static void tiocmget_intr_callback(struct urb *urb);
318 /*****************************************************************************/
319 /* Helping functions */
320 /*****************************************************************************/
321
322 /* #define DEBUG */
323
324 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
325 {
326 return hso_dev->port_data.dev_net;
327 }
328
329 static 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
336 static 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 */
359 static int debug;
360 static int tty_major;
361 static int disable_net;
362
363 /* driver info */
364 static const char driver_name[] = "hso";
365 static const char tty_filename[] = "ttyHS";
366 static const char *version = __FILE__ ": " MOD_AUTHOR;
367 /* the usb driver itself (registered in hso_init) */
368 static struct usb_driver hso_driver;
369 /* serial structures */
370 static struct tty_driver *tty_drv;
371 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
372 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
373 static spinlock_t serial_table_lock;
374
375 static 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
382 static 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 */
399 static 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 };
457 MODULE_DEVICE_TABLE(usb, hso_ids);
458
459 /* Sysfs attribute */
460 static 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 }
508 static DEVICE_ATTR(hsotype, 0444, hso_sysfs_show_porttype, NULL);
509
510 static struct attribute *hso_serial_dev_attrs[] = {
511 &dev_attr_hsotype.attr,
512 NULL
513 };
514
515 ATTRIBUTE_GROUPS(hso_serial_dev);
516
517 static 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 */
529 static 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 */
556 static 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
582 static 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
601 static 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
614 static 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
632 static 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
644 static 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 */
695 static 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 */
725 static 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 */
741 static 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 */
771 static 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
818 static const struct ethtool_ops ops = {
819 .get_link = ethtool_op_get_link
820 };
821
822 /* called when a packet did not ack after watchdogtimeout */
823 static void hso_net_tx_timeout(struct net_device *net, unsigned int txqueue)
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 */
843 static 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
970 static 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) */
983 static 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
1046 static 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
1085 static 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
1114 static 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
1137 static 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
1156 static 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 */
1179 static 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 */
1217 static void hso_unthrottle_tasklet(unsigned long data)
1218 {
1219 struct hso_serial *serial = (struct hso_serial *)data;
1220 unsigned long flags;
1221
1222 spin_lock_irqsave(&serial->serial_lock, flags);
1223 if ((serial->parent->port_spec & HSO_INTF_MUX))
1224 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1225 else
1226 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1227 spin_unlock_irqrestore(&serial->serial_lock, flags);
1228 }
1229
1230 static void hso_unthrottle(struct tty_struct *tty)
1231 {
1232 struct hso_serial *serial = tty->driver_data;
1233
1234 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1235 }
1236
1237 /* open the requested serial port */
1238 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1239 {
1240 struct hso_serial *serial = get_serial_by_index(tty->index);
1241 int result;
1242
1243 /* sanity check */
1244 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1245 WARN_ON(1);
1246 tty->driver_data = NULL;
1247 hso_dbg(0x1, "Failed to open port\n");
1248 return -ENODEV;
1249 }
1250
1251 mutex_lock(&serial->parent->mutex);
1252 result = usb_autopm_get_interface(serial->parent->interface);
1253 if (result < 0)
1254 goto err_out;
1255
1256 hso_dbg(0x1, "Opening %d\n", serial->minor);
1257
1258 /* setup */
1259 tty->driver_data = serial;
1260 tty_port_tty_set(&serial->port, tty);
1261
1262 /* check for port already opened, if not set the termios */
1263 serial->port.count++;
1264 if (serial->port.count == 1) {
1265 serial->rx_state = RX_IDLE;
1266 /* Force default termio settings */
1267 _hso_serial_set_termios(tty, NULL);
1268 tasklet_init(&serial->unthrottle_tasklet,
1269 hso_unthrottle_tasklet,
1270 (unsigned long)serial);
1271 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1272 if (result) {
1273 hso_stop_serial_device(serial->parent);
1274 serial->port.count--;
1275 } else {
1276 kref_get(&serial->parent->ref);
1277 }
1278 } else {
1279 hso_dbg(0x1, "Port was already open\n");
1280 }
1281
1282 usb_autopm_put_interface(serial->parent->interface);
1283
1284 /* done */
1285 if (result)
1286 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1287 err_out:
1288 mutex_unlock(&serial->parent->mutex);
1289 return result;
1290 }
1291
1292 /* close the requested serial port */
1293 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1294 {
1295 struct hso_serial *serial = tty->driver_data;
1296 u8 usb_gone;
1297
1298 hso_dbg(0x1, "Closing serial port\n");
1299
1300 /* Open failed, no close cleanup required */
1301 if (serial == NULL)
1302 return;
1303
1304 mutex_lock(&serial->parent->mutex);
1305 usb_gone = serial->parent->usb_gone;
1306
1307 if (!usb_gone)
1308 usb_autopm_get_interface(serial->parent->interface);
1309
1310 /* reset the rts and dtr */
1311 /* do the actual close */
1312 serial->port.count--;
1313
1314 if (serial->port.count <= 0) {
1315 serial->port.count = 0;
1316 tty_port_tty_set(&serial->port, NULL);
1317 if (!usb_gone)
1318 hso_stop_serial_device(serial->parent);
1319 tasklet_kill(&serial->unthrottle_tasklet);
1320 }
1321
1322 if (!usb_gone)
1323 usb_autopm_put_interface(serial->parent->interface);
1324
1325 mutex_unlock(&serial->parent->mutex);
1326 }
1327
1328 /* close the requested serial port */
1329 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1330 int count)
1331 {
1332 struct hso_serial *serial = tty->driver_data;
1333 int space, tx_bytes;
1334 unsigned long flags;
1335
1336 /* sanity check */
1337 if (serial == NULL) {
1338 pr_err("%s: serial is NULL\n", __func__);
1339 return -ENODEV;
1340 }
1341
1342 spin_lock_irqsave(&serial->serial_lock, flags);
1343
1344 space = serial->tx_data_length - serial->tx_buffer_count;
1345 tx_bytes = (count < space) ? count : space;
1346
1347 if (!tx_bytes)
1348 goto out;
1349
1350 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1351 serial->tx_buffer_count += tx_bytes;
1352
1353 out:
1354 spin_unlock_irqrestore(&serial->serial_lock, flags);
1355
1356 hso_kick_transmit(serial);
1357 /* done */
1358 return tx_bytes;
1359 }
1360
1361 /* how much room is there for writing */
1362 static int hso_serial_write_room(struct tty_struct *tty)
1363 {
1364 struct hso_serial *serial = tty->driver_data;
1365 int room;
1366 unsigned long flags;
1367
1368 spin_lock_irqsave(&serial->serial_lock, flags);
1369 room = serial->tx_data_length - serial->tx_buffer_count;
1370 spin_unlock_irqrestore(&serial->serial_lock, flags);
1371
1372 /* return free room */
1373 return room;
1374 }
1375
1376 static void hso_serial_cleanup(struct tty_struct *tty)
1377 {
1378 struct hso_serial *serial = tty->driver_data;
1379
1380 if (!serial)
1381 return;
1382
1383 kref_put(&serial->parent->ref, hso_serial_ref_free);
1384 }
1385
1386 /* setup the term */
1387 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1388 {
1389 struct hso_serial *serial = tty->driver_data;
1390 unsigned long flags;
1391
1392 if (old)
1393 hso_dbg(0x16, "Termios called with: cflags new[%d] - old[%d]\n",
1394 tty->termios.c_cflag, old->c_cflag);
1395
1396 /* the actual setup */
1397 spin_lock_irqsave(&serial->serial_lock, flags);
1398 if (serial->port.count)
1399 _hso_serial_set_termios(tty, old);
1400 else
1401 tty->termios = *old;
1402 spin_unlock_irqrestore(&serial->serial_lock, flags);
1403
1404 /* done */
1405 }
1406
1407 /* how many characters in the buffer */
1408 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1409 {
1410 struct hso_serial *serial = tty->driver_data;
1411 int chars;
1412 unsigned long flags;
1413
1414 /* sanity check */
1415 if (serial == NULL)
1416 return 0;
1417
1418 spin_lock_irqsave(&serial->serial_lock, flags);
1419 chars = serial->tx_buffer_count;
1420 spin_unlock_irqrestore(&serial->serial_lock, flags);
1421
1422 return chars;
1423 }
1424 static int tiocmget_submit_urb(struct hso_serial *serial,
1425 struct hso_tiocmget *tiocmget,
1426 struct usb_device *usb)
1427 {
1428 int result;
1429
1430 if (serial->parent->usb_gone)
1431 return -ENODEV;
1432 usb_fill_int_urb(tiocmget->urb, usb,
1433 usb_rcvintpipe(usb,
1434 tiocmget->endp->
1435 bEndpointAddress & 0x7F),
1436 tiocmget->serial_state_notification,
1437 sizeof(struct hso_serial_state_notification),
1438 tiocmget_intr_callback, serial,
1439 tiocmget->endp->bInterval);
1440 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1441 if (result) {
1442 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1443 result);
1444 }
1445 return result;
1446
1447 }
1448
1449 static void tiocmget_intr_callback(struct urb *urb)
1450 {
1451 struct hso_serial *serial = urb->context;
1452 struct hso_tiocmget *tiocmget;
1453 int status = urb->status;
1454 u16 UART_state_bitmap, prev_UART_state_bitmap;
1455 struct uart_icount *icount;
1456 struct hso_serial_state_notification *serial_state_notification;
1457 struct usb_device *usb;
1458 struct usb_interface *interface;
1459 int if_num;
1460
1461 /* Sanity checks */
1462 if (!serial)
1463 return;
1464 if (status) {
1465 handle_usb_error(status, __func__, serial->parent);
1466 return;
1467 }
1468
1469 /* tiocmget is only supported on HSO_PORT_MODEM */
1470 tiocmget = serial->tiocmget;
1471 if (!tiocmget)
1472 return;
1473 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
1474
1475 usb = serial->parent->usb;
1476 interface = serial->parent->interface;
1477
1478 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1479
1480 /* wIndex should be the USB interface number of the port to which the
1481 * notification applies, which should always be the Modem port.
1482 */
1483 serial_state_notification = tiocmget->serial_state_notification;
1484 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1485 serial_state_notification->bNotification != B_NOTIFICATION ||
1486 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1487 le16_to_cpu(serial_state_notification->wIndex) != if_num ||
1488 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1489 dev_warn(&usb->dev,
1490 "hso received invalid serial state notification\n");
1491 DUMP(serial_state_notification,
1492 sizeof(struct hso_serial_state_notification));
1493 } else {
1494 unsigned long flags;
1495
1496 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1497 UART_state_bitmap);
1498 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1499 icount = &tiocmget->icount;
1500 spin_lock_irqsave(&serial->serial_lock, flags);
1501 if ((UART_state_bitmap & B_OVERRUN) !=
1502 (prev_UART_state_bitmap & B_OVERRUN))
1503 icount->parity++;
1504 if ((UART_state_bitmap & B_PARITY) !=
1505 (prev_UART_state_bitmap & B_PARITY))
1506 icount->parity++;
1507 if ((UART_state_bitmap & B_FRAMING) !=
1508 (prev_UART_state_bitmap & B_FRAMING))
1509 icount->frame++;
1510 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1511 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1512 icount->rng++;
1513 if ((UART_state_bitmap & B_BREAK) !=
1514 (prev_UART_state_bitmap & B_BREAK))
1515 icount->brk++;
1516 if ((UART_state_bitmap & B_TX_CARRIER) !=
1517 (prev_UART_state_bitmap & B_TX_CARRIER))
1518 icount->dsr++;
1519 if ((UART_state_bitmap & B_RX_CARRIER) !=
1520 (prev_UART_state_bitmap & B_RX_CARRIER))
1521 icount->dcd++;
1522 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1523 spin_unlock_irqrestore(&serial->serial_lock, flags);
1524 tiocmget->intr_completed = 1;
1525 wake_up_interruptible(&tiocmget->waitq);
1526 }
1527 memset(serial_state_notification, 0,
1528 sizeof(struct hso_serial_state_notification));
1529 tiocmget_submit_urb(serial,
1530 tiocmget,
1531 serial->parent->usb);
1532 }
1533
1534 /*
1535 * next few functions largely stolen from drivers/serial/serial_core.c
1536 */
1537 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1538 * - mask passed in arg for lines of interest
1539 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1540 * Caller should use TIOCGICOUNT to see which one it was
1541 */
1542 static int
1543 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1544 {
1545 DECLARE_WAITQUEUE(wait, current);
1546 struct uart_icount cprev, cnow;
1547 struct hso_tiocmget *tiocmget;
1548 int ret;
1549
1550 tiocmget = serial->tiocmget;
1551 if (!tiocmget)
1552 return -ENOENT;
1553 /*
1554 * note the counters on entry
1555 */
1556 spin_lock_irq(&serial->serial_lock);
1557 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1558 spin_unlock_irq(&serial->serial_lock);
1559 add_wait_queue(&tiocmget->waitq, &wait);
1560 for (;;) {
1561 spin_lock_irq(&serial->serial_lock);
1562 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1563 spin_unlock_irq(&serial->serial_lock);
1564 set_current_state(TASK_INTERRUPTIBLE);
1565 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1566 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1567 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1568 ret = 0;
1569 break;
1570 }
1571 schedule();
1572 /* see if a signal did it */
1573 if (signal_pending(current)) {
1574 ret = -ERESTARTSYS;
1575 break;
1576 }
1577 cprev = cnow;
1578 }
1579 __set_current_state(TASK_RUNNING);
1580 remove_wait_queue(&tiocmget->waitq, &wait);
1581
1582 return ret;
1583 }
1584
1585 /*
1586 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1587 * Return: write counters to the user passed counter struct
1588 * NB: both 1->0 and 0->1 transitions are counted except for
1589 * RI where only 0->1 is counted.
1590 */
1591 static int hso_get_count(struct tty_struct *tty,
1592 struct serial_icounter_struct *icount)
1593 {
1594 struct uart_icount cnow;
1595 struct hso_serial *serial = tty->driver_data;
1596 struct hso_tiocmget *tiocmget = serial->tiocmget;
1597
1598 memset(icount, 0, sizeof(struct serial_icounter_struct));
1599
1600 if (!tiocmget)
1601 return -ENOENT;
1602 spin_lock_irq(&serial->serial_lock);
1603 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1604 spin_unlock_irq(&serial->serial_lock);
1605
1606 icount->cts = cnow.cts;
1607 icount->dsr = cnow.dsr;
1608 icount->rng = cnow.rng;
1609 icount->dcd = cnow.dcd;
1610 icount->rx = cnow.rx;
1611 icount->tx = cnow.tx;
1612 icount->frame = cnow.frame;
1613 icount->overrun = cnow.overrun;
1614 icount->parity = cnow.parity;
1615 icount->brk = cnow.brk;
1616 icount->buf_overrun = cnow.buf_overrun;
1617
1618 return 0;
1619 }
1620
1621
1622 static int hso_serial_tiocmget(struct tty_struct *tty)
1623 {
1624 int retval;
1625 struct hso_serial *serial = tty->driver_data;
1626 struct hso_tiocmget *tiocmget;
1627 u16 UART_state_bitmap;
1628
1629 /* sanity check */
1630 if (!serial) {
1631 hso_dbg(0x1, "no tty structures\n");
1632 return -EINVAL;
1633 }
1634 spin_lock_irq(&serial->serial_lock);
1635 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1636 ((serial->dtr_state) ? TIOCM_DTR : 0);
1637 tiocmget = serial->tiocmget;
1638 if (tiocmget) {
1639
1640 UART_state_bitmap = le16_to_cpu(
1641 tiocmget->prev_UART_state_bitmap);
1642 if (UART_state_bitmap & B_RING_SIGNAL)
1643 retval |= TIOCM_RNG;
1644 if (UART_state_bitmap & B_RX_CARRIER)
1645 retval |= TIOCM_CD;
1646 if (UART_state_bitmap & B_TX_CARRIER)
1647 retval |= TIOCM_DSR;
1648 }
1649 spin_unlock_irq(&serial->serial_lock);
1650 return retval;
1651 }
1652
1653 static int hso_serial_tiocmset(struct tty_struct *tty,
1654 unsigned int set, unsigned int clear)
1655 {
1656 int val = 0;
1657 unsigned long flags;
1658 int if_num;
1659 struct hso_serial *serial = tty->driver_data;
1660 struct usb_interface *interface;
1661
1662 /* sanity check */
1663 if (!serial) {
1664 hso_dbg(0x1, "no tty structures\n");
1665 return -EINVAL;
1666 }
1667
1668 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1669 return -EINVAL;
1670
1671 interface = serial->parent->interface;
1672 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
1673
1674 spin_lock_irqsave(&serial->serial_lock, flags);
1675 if (set & TIOCM_RTS)
1676 serial->rts_state = 1;
1677 if (set & TIOCM_DTR)
1678 serial->dtr_state = 1;
1679
1680 if (clear & TIOCM_RTS)
1681 serial->rts_state = 0;
1682 if (clear & TIOCM_DTR)
1683 serial->dtr_state = 0;
1684
1685 if (serial->dtr_state)
1686 val |= 0x01;
1687 if (serial->rts_state)
1688 val |= 0x02;
1689
1690 spin_unlock_irqrestore(&serial->serial_lock, flags);
1691
1692 return usb_control_msg(serial->parent->usb,
1693 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1694 0x21, val, if_num, NULL, 0,
1695 USB_CTRL_SET_TIMEOUT);
1696 }
1697
1698 static int hso_serial_ioctl(struct tty_struct *tty,
1699 unsigned int cmd, unsigned long arg)
1700 {
1701 struct hso_serial *serial = tty->driver_data;
1702 int ret = 0;
1703 hso_dbg(0x8, "IOCTL cmd: %d, arg: %ld\n", cmd, arg);
1704
1705 if (!serial)
1706 return -ENODEV;
1707 switch (cmd) {
1708 case TIOCMIWAIT:
1709 ret = hso_wait_modem_status(serial, arg);
1710 break;
1711 default:
1712 ret = -ENOIOCTLCMD;
1713 break;
1714 }
1715 return ret;
1716 }
1717
1718
1719 /* starts a transmit */
1720 static void hso_kick_transmit(struct hso_serial *serial)
1721 {
1722 unsigned long flags;
1723 int res;
1724
1725 spin_lock_irqsave(&serial->serial_lock, flags);
1726 if (!serial->tx_buffer_count)
1727 goto out;
1728
1729 if (serial->tx_urb_used)
1730 goto out;
1731
1732 /* Wakeup USB interface if necessary */
1733 if (hso_get_activity(serial->parent) == -EAGAIN)
1734 goto out;
1735
1736 /* Switch pointers around to avoid memcpy */
1737 swap(serial->tx_buffer, serial->tx_data);
1738 serial->tx_data_count = serial->tx_buffer_count;
1739 serial->tx_buffer_count = 0;
1740
1741 /* If serial->tx_data is set, it means we switched buffers */
1742 if (serial->tx_data && serial->write_data) {
1743 res = serial->write_data(serial);
1744 if (res >= 0)
1745 serial->tx_urb_used = 1;
1746 }
1747 out:
1748 spin_unlock_irqrestore(&serial->serial_lock, flags);
1749 }
1750
1751 /* make a request (for reading and writing data to muxed serial port) */
1752 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1753 struct urb *ctrl_urb,
1754 struct usb_ctrlrequest *ctrl_req,
1755 u8 *ctrl_urb_data, u32 size)
1756 {
1757 int result;
1758 int pipe;
1759
1760 /* Sanity check */
1761 if (!serial || !ctrl_urb || !ctrl_req) {
1762 pr_err("%s: Wrong arguments\n", __func__);
1763 return -EINVAL;
1764 }
1765
1766 /* initialize */
1767 ctrl_req->wValue = 0;
1768 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1769 ctrl_req->wLength = cpu_to_le16(size);
1770
1771 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1772 /* Reading command */
1773 ctrl_req->bRequestType = USB_DIR_IN |
1774 USB_TYPE_OPTION_VENDOR |
1775 USB_RECIP_INTERFACE;
1776 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1777 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1778 } else {
1779 /* Writing command */
1780 ctrl_req->bRequestType = USB_DIR_OUT |
1781 USB_TYPE_OPTION_VENDOR |
1782 USB_RECIP_INTERFACE;
1783 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1784 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1785 }
1786 /* syslog */
1787 hso_dbg(0x2, "%s command (%02x) len: %d, port: %d\n",
1788 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1789 ctrl_req->bRequestType, ctrl_req->wLength, port);
1790
1791 /* Load ctrl urb */
1792 ctrl_urb->transfer_flags = 0;
1793 usb_fill_control_urb(ctrl_urb,
1794 serial->parent->usb,
1795 pipe,
1796 (u8 *) ctrl_req,
1797 ctrl_urb_data, size, ctrl_callback, serial);
1798 /* Send it on merry way */
1799 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1800 if (result) {
1801 dev_err(&ctrl_urb->dev->dev,
1802 "%s failed submit ctrl_urb %d type %d\n", __func__,
1803 result, type);
1804 return result;
1805 }
1806
1807 /* done */
1808 return size;
1809 }
1810
1811 /* called by intr_callback when read occurs */
1812 static int hso_mux_serial_read(struct hso_serial *serial)
1813 {
1814 if (!serial)
1815 return -EINVAL;
1816
1817 /* clean data */
1818 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1819 /* make the request */
1820
1821 if (serial->num_rx_urbs != 1) {
1822 dev_err(&serial->parent->interface->dev,
1823 "ERROR: mux'd reads with multiple buffers "
1824 "not possible\n");
1825 return 0;
1826 }
1827 return mux_device_request(serial,
1828 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1829 serial->parent->port_spec & HSO_PORT_MASK,
1830 serial->rx_urb[0],
1831 &serial->ctrl_req_rx,
1832 serial->rx_data[0], serial->rx_data_length);
1833 }
1834
1835 /* used for muxed serial port callback (muxed serial read) */
1836 static void intr_callback(struct urb *urb)
1837 {
1838 struct hso_shared_int *shared_int = urb->context;
1839 struct hso_serial *serial;
1840 unsigned char *port_req;
1841 int status = urb->status;
1842 unsigned long flags;
1843 int i;
1844
1845 usb_mark_last_busy(urb->dev);
1846
1847 /* sanity check */
1848 if (!shared_int)
1849 return;
1850
1851 /* status check */
1852 if (status) {
1853 handle_usb_error(status, __func__, NULL);
1854 return;
1855 }
1856 hso_dbg(0x8, "--- Got intr callback 0x%02X ---\n", status);
1857
1858 /* what request? */
1859 port_req = urb->transfer_buffer;
1860 hso_dbg(0x8, "port_req = 0x%.2X\n", *port_req);
1861 /* loop over all muxed ports to find the one sending this */
1862 for (i = 0; i < 8; i++) {
1863 /* max 8 channels on MUX */
1864 if (*port_req & (1 << i)) {
1865 serial = get_serial_by_shared_int_and_type(shared_int,
1866 (1 << i));
1867 if (serial != NULL) {
1868 hso_dbg(0x1, "Pending read interrupt on port %d\n",
1869 i);
1870 spin_lock_irqsave(&serial->serial_lock, flags);
1871 if (serial->rx_state == RX_IDLE &&
1872 serial->port.count > 0) {
1873 /* Setup and send a ctrl req read on
1874 * port i */
1875 if (!serial->rx_urb_filled[0]) {
1876 serial->rx_state = RX_SENT;
1877 hso_mux_serial_read(serial);
1878 } else
1879 serial->rx_state = RX_PENDING;
1880 } else {
1881 hso_dbg(0x1, "Already a read pending on port %d or port not open\n",
1882 i);
1883 }
1884 spin_unlock_irqrestore(&serial->serial_lock,
1885 flags);
1886 }
1887 }
1888 }
1889 /* Resubmit interrupt urb */
1890 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1891 }
1892
1893 /* called for writing to muxed serial port */
1894 static int hso_mux_serial_write_data(struct hso_serial *serial)
1895 {
1896 if (NULL == serial)
1897 return -EINVAL;
1898
1899 return mux_device_request(serial,
1900 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1901 serial->parent->port_spec & HSO_PORT_MASK,
1902 serial->tx_urb,
1903 &serial->ctrl_req_tx,
1904 serial->tx_data, serial->tx_data_count);
1905 }
1906
1907 /* write callback for Diag and CS port */
1908 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1909 {
1910 struct hso_serial *serial = urb->context;
1911 int status = urb->status;
1912 unsigned long flags;
1913
1914 /* sanity check */
1915 if (!serial) {
1916 hso_dbg(0x1, "serial == NULL\n");
1917 return;
1918 }
1919
1920 spin_lock_irqsave(&serial->serial_lock, flags);
1921 serial->tx_urb_used = 0;
1922 spin_unlock_irqrestore(&serial->serial_lock, flags);
1923 if (status) {
1924 handle_usb_error(status, __func__, serial->parent);
1925 return;
1926 }
1927 hso_put_activity(serial->parent);
1928 tty_port_tty_wakeup(&serial->port);
1929 hso_kick_transmit(serial);
1930
1931 hso_dbg(0x1, "\n");
1932 }
1933
1934 /* called for writing diag or CS serial port */
1935 static int hso_std_serial_write_data(struct hso_serial *serial)
1936 {
1937 int count = serial->tx_data_count;
1938 int result;
1939
1940 usb_fill_bulk_urb(serial->tx_urb,
1941 serial->parent->usb,
1942 usb_sndbulkpipe(serial->parent->usb,
1943 serial->out_endp->
1944 bEndpointAddress & 0x7F),
1945 serial->tx_data, serial->tx_data_count,
1946 hso_std_serial_write_bulk_callback, serial);
1947
1948 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1949 if (result) {
1950 dev_warn(&serial->parent->usb->dev,
1951 "Failed to submit urb - res %d\n", result);
1952 return result;
1953 }
1954
1955 return count;
1956 }
1957
1958 /* callback after read or write on muxed serial port */
1959 static void ctrl_callback(struct urb *urb)
1960 {
1961 struct hso_serial *serial = urb->context;
1962 struct usb_ctrlrequest *req;
1963 int status = urb->status;
1964 unsigned long flags;
1965
1966 /* sanity check */
1967 if (!serial)
1968 return;
1969
1970 spin_lock_irqsave(&serial->serial_lock, flags);
1971 serial->tx_urb_used = 0;
1972 spin_unlock_irqrestore(&serial->serial_lock, flags);
1973 if (status) {
1974 handle_usb_error(status, __func__, serial->parent);
1975 return;
1976 }
1977
1978 /* what request? */
1979 req = (struct usb_ctrlrequest *)(urb->setup_packet);
1980 hso_dbg(0x8, "--- Got muxed ctrl callback 0x%02X ---\n", status);
1981 hso_dbg(0x8, "Actual length of urb = %d\n", urb->actual_length);
1982 DUMP1(urb->transfer_buffer, urb->actual_length);
1983
1984 if (req->bRequestType ==
1985 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
1986 /* response to a read command */
1987 serial->rx_urb_filled[0] = 1;
1988 spin_lock_irqsave(&serial->serial_lock, flags);
1989 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1990 spin_unlock_irqrestore(&serial->serial_lock, flags);
1991 } else {
1992 hso_put_activity(serial->parent);
1993 tty_port_tty_wakeup(&serial->port);
1994 /* response to a write command */
1995 hso_kick_transmit(serial);
1996 }
1997 }
1998
1999 /* handle RX data for serial port */
2000 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2001 {
2002 struct tty_struct *tty;
2003 int count;
2004
2005 /* Sanity check */
2006 if (urb == NULL || serial == NULL) {
2007 hso_dbg(0x1, "serial = NULL\n");
2008 return -2;
2009 }
2010
2011 tty = tty_port_tty_get(&serial->port);
2012
2013 if (tty && tty_throttled(tty)) {
2014 tty_kref_put(tty);
2015 return -1;
2016 }
2017
2018 /* Push data to tty */
2019 hso_dbg(0x1, "data to push to tty\n");
2020 count = tty_buffer_request_room(&serial->port, urb->actual_length);
2021 if (count >= urb->actual_length) {
2022 tty_insert_flip_string(&serial->port, urb->transfer_buffer,
2023 urb->actual_length);
2024 tty_flip_buffer_push(&serial->port);
2025 } else {
2026 dev_warn(&serial->parent->usb->dev,
2027 "dropping data, %d bytes lost\n", urb->actual_length);
2028 }
2029
2030 tty_kref_put(tty);
2031
2032 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2033
2034 return 0;
2035 }
2036
2037
2038 /* Base driver functions */
2039
2040 static void hso_log_port(struct hso_device *hso_dev)
2041 {
2042 char *port_type;
2043 char port_dev[20];
2044
2045 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2046 case HSO_PORT_CONTROL:
2047 port_type = "Control";
2048 break;
2049 case HSO_PORT_APP:
2050 port_type = "Application";
2051 break;
2052 case HSO_PORT_GPS:
2053 port_type = "GPS";
2054 break;
2055 case HSO_PORT_GPS_CONTROL:
2056 port_type = "GPS control";
2057 break;
2058 case HSO_PORT_APP2:
2059 port_type = "Application2";
2060 break;
2061 case HSO_PORT_PCSC:
2062 port_type = "PCSC";
2063 break;
2064 case HSO_PORT_DIAG:
2065 port_type = "Diagnostic";
2066 break;
2067 case HSO_PORT_DIAG2:
2068 port_type = "Diagnostic2";
2069 break;
2070 case HSO_PORT_MODEM:
2071 port_type = "Modem";
2072 break;
2073 case HSO_PORT_NETWORK:
2074 port_type = "Network";
2075 break;
2076 default:
2077 port_type = "Unknown";
2078 break;
2079 }
2080 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2081 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2082 } else
2083 sprintf(port_dev, "/dev/%s%d", tty_filename,
2084 dev2ser(hso_dev)->minor);
2085
2086 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2087 port_type, port_dev);
2088 }
2089
2090 static int hso_start_net_device(struct hso_device *hso_dev)
2091 {
2092 int i, result = 0;
2093 struct hso_net *hso_net = dev2net(hso_dev);
2094
2095 if (!hso_net)
2096 return -ENODEV;
2097
2098 /* send URBs for all read buffers */
2099 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2100
2101 /* Prep a receive URB */
2102 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2103 hso_dev->usb,
2104 usb_rcvbulkpipe(hso_dev->usb,
2105 hso_net->in_endp->
2106 bEndpointAddress & 0x7F),
2107 hso_net->mux_bulk_rx_buf_pool[i],
2108 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2109 hso_net);
2110
2111 /* Put it out there so the device can send us stuff */
2112 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2113 GFP_NOIO);
2114 if (result)
2115 dev_warn(&hso_dev->usb->dev,
2116 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2117 i, result);
2118 }
2119
2120 return result;
2121 }
2122
2123 static int hso_stop_net_device(struct hso_device *hso_dev)
2124 {
2125 int i;
2126 struct hso_net *hso_net = dev2net(hso_dev);
2127
2128 if (!hso_net)
2129 return -ENODEV;
2130
2131 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2132 if (hso_net->mux_bulk_rx_urb_pool[i])
2133 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2134
2135 }
2136 if (hso_net->mux_bulk_tx_urb)
2137 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2138
2139 return 0;
2140 }
2141
2142 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2143 {
2144 int i, result = 0;
2145 struct hso_serial *serial = dev2ser(hso_dev);
2146
2147 if (!serial)
2148 return -ENODEV;
2149
2150 /* If it is not the MUX port fill in and submit a bulk urb (already
2151 * allocated in hso_serial_start) */
2152 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2153 for (i = 0; i < serial->num_rx_urbs; i++) {
2154 usb_fill_bulk_urb(serial->rx_urb[i],
2155 serial->parent->usb,
2156 usb_rcvbulkpipe(serial->parent->usb,
2157 serial->in_endp->
2158 bEndpointAddress &
2159 0x7F),
2160 serial->rx_data[i],
2161 serial->rx_data_length,
2162 hso_std_serial_read_bulk_callback,
2163 serial);
2164 result = usb_submit_urb(serial->rx_urb[i], flags);
2165 if (result) {
2166 dev_warn(&serial->parent->usb->dev,
2167 "Failed to submit urb - res %d\n",
2168 result);
2169 break;
2170 }
2171 }
2172 } else {
2173 mutex_lock(&serial->shared_int->shared_int_lock);
2174 if (!serial->shared_int->use_count) {
2175 result =
2176 hso_mux_submit_intr_urb(serial->shared_int,
2177 hso_dev->usb, flags);
2178 }
2179 serial->shared_int->use_count++;
2180 mutex_unlock(&serial->shared_int->shared_int_lock);
2181 }
2182 if (serial->tiocmget)
2183 tiocmget_submit_urb(serial,
2184 serial->tiocmget,
2185 serial->parent->usb);
2186 return result;
2187 }
2188
2189 static int hso_stop_serial_device(struct hso_device *hso_dev)
2190 {
2191 int i;
2192 struct hso_serial *serial = dev2ser(hso_dev);
2193 struct hso_tiocmget *tiocmget;
2194
2195 if (!serial)
2196 return -ENODEV;
2197
2198 for (i = 0; i < serial->num_rx_urbs; i++) {
2199 if (serial->rx_urb[i]) {
2200 usb_kill_urb(serial->rx_urb[i]);
2201 serial->rx_urb_filled[i] = 0;
2202 }
2203 }
2204 serial->curr_rx_urb_idx = 0;
2205
2206 if (serial->tx_urb)
2207 usb_kill_urb(serial->tx_urb);
2208
2209 if (serial->shared_int) {
2210 mutex_lock(&serial->shared_int->shared_int_lock);
2211 if (serial->shared_int->use_count &&
2212 (--serial->shared_int->use_count == 0)) {
2213 struct urb *urb;
2214
2215 urb = serial->shared_int->shared_intr_urb;
2216 if (urb)
2217 usb_kill_urb(urb);
2218 }
2219 mutex_unlock(&serial->shared_int->shared_int_lock);
2220 }
2221 tiocmget = serial->tiocmget;
2222 if (tiocmget) {
2223 wake_up_interruptible(&tiocmget->waitq);
2224 usb_kill_urb(tiocmget->urb);
2225 }
2226
2227 return 0;
2228 }
2229
2230 static void hso_serial_tty_unregister(struct hso_serial *serial)
2231 {
2232 tty_unregister_device(tty_drv, serial->minor);
2233 }
2234
2235 static void hso_serial_common_free(struct hso_serial *serial)
2236 {
2237 int i;
2238
2239 for (i = 0; i < serial->num_rx_urbs; i++) {
2240 /* unlink and free RX URB */
2241 usb_free_urb(serial->rx_urb[i]);
2242 /* free the RX buffer */
2243 kfree(serial->rx_data[i]);
2244 }
2245
2246 /* unlink and free TX URB */
2247 usb_free_urb(serial->tx_urb);
2248 kfree(serial->tx_buffer);
2249 kfree(serial->tx_data);
2250 tty_port_destroy(&serial->port);
2251 }
2252
2253 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2254 int rx_size, int tx_size)
2255 {
2256 int minor;
2257 int i;
2258
2259 tty_port_init(&serial->port);
2260
2261 minor = get_free_serial_index();
2262 if (minor < 0)
2263 goto exit;
2264
2265 /* register our minor number */
2266 serial->parent->dev = tty_port_register_device_attr(&serial->port,
2267 tty_drv, minor, &serial->parent->interface->dev,
2268 serial->parent, hso_serial_dev_groups);
2269
2270 /* fill in specific data for later use */
2271 serial->minor = minor;
2272 serial->magic = HSO_SERIAL_MAGIC;
2273 spin_lock_init(&serial->serial_lock);
2274 serial->num_rx_urbs = num_urbs;
2275
2276 /* RX, allocate urb and initialize */
2277
2278 /* prepare our RX buffer */
2279 serial->rx_data_length = rx_size;
2280 for (i = 0; i < serial->num_rx_urbs; i++) {
2281 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2282 if (!serial->rx_urb[i])
2283 goto exit;
2284 serial->rx_urb[i]->transfer_buffer = NULL;
2285 serial->rx_urb[i]->transfer_buffer_length = 0;
2286 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2287 GFP_KERNEL);
2288 if (!serial->rx_data[i])
2289 goto exit;
2290 }
2291
2292 /* TX, allocate urb and initialize */
2293 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2294 if (!serial->tx_urb)
2295 goto exit;
2296 serial->tx_urb->transfer_buffer = NULL;
2297 serial->tx_urb->transfer_buffer_length = 0;
2298 /* prepare our TX buffer */
2299 serial->tx_data_count = 0;
2300 serial->tx_buffer_count = 0;
2301 serial->tx_data_length = tx_size;
2302 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2303 if (!serial->tx_data)
2304 goto exit;
2305
2306 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2307 if (!serial->tx_buffer)
2308 goto exit;
2309
2310 return 0;
2311 exit:
2312 hso_serial_tty_unregister(serial);
2313 hso_serial_common_free(serial);
2314 return -1;
2315 }
2316
2317 /* Creates a general hso device */
2318 static struct hso_device *hso_create_device(struct usb_interface *intf,
2319 int port_spec)
2320 {
2321 struct hso_device *hso_dev;
2322
2323 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2324 if (!hso_dev)
2325 return NULL;
2326
2327 hso_dev->port_spec = port_spec;
2328 hso_dev->usb = interface_to_usbdev(intf);
2329 hso_dev->interface = intf;
2330 kref_init(&hso_dev->ref);
2331 mutex_init(&hso_dev->mutex);
2332
2333 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2334 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2335
2336 return hso_dev;
2337 }
2338
2339 /* Removes a network device in the network device table */
2340 static int remove_net_device(struct hso_device *hso_dev)
2341 {
2342 int i;
2343
2344 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2345 if (network_table[i] == hso_dev) {
2346 network_table[i] = NULL;
2347 break;
2348 }
2349 }
2350 if (i == HSO_MAX_NET_DEVICES)
2351 return -1;
2352 return 0;
2353 }
2354
2355 /* Frees our network device */
2356 static void hso_free_net_device(struct hso_device *hso_dev)
2357 {
2358 int i;
2359 struct hso_net *hso_net = dev2net(hso_dev);
2360
2361 if (!hso_net)
2362 return;
2363
2364 remove_net_device(hso_net->parent);
2365
2366 if (hso_net->net)
2367 unregister_netdev(hso_net->net);
2368
2369 /* start freeing */
2370 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2371 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2372 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2373 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2374 }
2375 usb_free_urb(hso_net->mux_bulk_tx_urb);
2376 kfree(hso_net->mux_bulk_tx_buf);
2377 hso_net->mux_bulk_tx_buf = NULL;
2378
2379 if (hso_net->net)
2380 free_netdev(hso_net->net);
2381
2382 kfree(hso_dev);
2383 }
2384
2385 static const struct net_device_ops hso_netdev_ops = {
2386 .ndo_open = hso_net_open,
2387 .ndo_stop = hso_net_close,
2388 .ndo_start_xmit = hso_net_start_xmit,
2389 .ndo_tx_timeout = hso_net_tx_timeout,
2390 };
2391
2392 /* initialize the network interface */
2393 static void hso_net_init(struct net_device *net)
2394 {
2395 struct hso_net *hso_net = netdev_priv(net);
2396
2397 hso_dbg(0x1, "sizeof hso_net is %zu\n", sizeof(*hso_net));
2398
2399 /* fill in the other fields */
2400 net->netdev_ops = &hso_netdev_ops;
2401 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2402 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2403 net->type = ARPHRD_NONE;
2404 net->mtu = DEFAULT_MTU - 14;
2405 net->tx_queue_len = 10;
2406 net->ethtool_ops = &ops;
2407
2408 /* and initialize the semaphore */
2409 spin_lock_init(&hso_net->net_lock);
2410 }
2411
2412 /* Adds a network device in the network device table */
2413 static int add_net_device(struct hso_device *hso_dev)
2414 {
2415 int i;
2416
2417 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2418 if (network_table[i] == NULL) {
2419 network_table[i] = hso_dev;
2420 break;
2421 }
2422 }
2423 if (i == HSO_MAX_NET_DEVICES)
2424 return -1;
2425 return 0;
2426 }
2427
2428 static int hso_rfkill_set_block(void *data, bool blocked)
2429 {
2430 struct hso_device *hso_dev = data;
2431 int enabled = !blocked;
2432 int rv;
2433
2434 mutex_lock(&hso_dev->mutex);
2435 if (hso_dev->usb_gone)
2436 rv = 0;
2437 else
2438 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2439 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2440 USB_CTRL_SET_TIMEOUT);
2441 mutex_unlock(&hso_dev->mutex);
2442 return rv;
2443 }
2444
2445 static const struct rfkill_ops hso_rfkill_ops = {
2446 .set_block = hso_rfkill_set_block,
2447 };
2448
2449 /* Creates and sets up everything for rfkill */
2450 static void hso_create_rfkill(struct hso_device *hso_dev,
2451 struct usb_interface *interface)
2452 {
2453 struct hso_net *hso_net = dev2net(hso_dev);
2454 struct device *dev = &hso_net->net->dev;
2455 static u32 rfkill_counter;
2456
2457 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d",
2458 rfkill_counter++);
2459
2460 hso_net->rfkill = rfkill_alloc(hso_net->name,
2461 &interface_to_usbdev(interface)->dev,
2462 RFKILL_TYPE_WWAN,
2463 &hso_rfkill_ops, hso_dev);
2464 if (!hso_net->rfkill) {
2465 dev_err(dev, "%s - Out of memory\n", __func__);
2466 return;
2467 }
2468 if (rfkill_register(hso_net->rfkill) < 0) {
2469 rfkill_destroy(hso_net->rfkill);
2470 hso_net->rfkill = NULL;
2471 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2472 return;
2473 }
2474 }
2475
2476 static struct device_type hso_type = {
2477 .name = "wwan",
2478 };
2479
2480 /* Creates our network device */
2481 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2482 int port_spec)
2483 {
2484 int result, i;
2485 struct net_device *net;
2486 struct hso_net *hso_net;
2487 struct hso_device *hso_dev;
2488
2489 hso_dev = hso_create_device(interface, port_spec);
2490 if (!hso_dev)
2491 return NULL;
2492
2493 /* allocate our network device, then we can put in our private data */
2494 /* call hso_net_init to do the basic initialization */
2495 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN,
2496 hso_net_init);
2497 if (!net) {
2498 dev_err(&interface->dev, "Unable to create ethernet device\n");
2499 goto exit;
2500 }
2501
2502 hso_net = netdev_priv(net);
2503
2504 hso_dev->port_data.dev_net = hso_net;
2505 hso_net->net = net;
2506 hso_net->parent = hso_dev;
2507
2508 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2509 USB_DIR_IN);
2510 if (!hso_net->in_endp) {
2511 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2512 goto exit;
2513 }
2514 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2515 USB_DIR_OUT);
2516 if (!hso_net->out_endp) {
2517 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2518 goto exit;
2519 }
2520 SET_NETDEV_DEV(net, &interface->dev);
2521 SET_NETDEV_DEVTYPE(net, &hso_type);
2522
2523 /* start allocating */
2524 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2525 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2526 if (!hso_net->mux_bulk_rx_urb_pool[i])
2527 goto exit;
2528 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2529 GFP_KERNEL);
2530 if (!hso_net->mux_bulk_rx_buf_pool[i])
2531 goto exit;
2532 }
2533 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2534 if (!hso_net->mux_bulk_tx_urb)
2535 goto exit;
2536 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2537 if (!hso_net->mux_bulk_tx_buf)
2538 goto exit;
2539
2540 add_net_device(hso_dev);
2541
2542 /* registering our net device */
2543 result = register_netdev(net);
2544 if (result) {
2545 dev_err(&interface->dev, "Failed to register device\n");
2546 goto exit;
2547 }
2548
2549 hso_log_port(hso_dev);
2550
2551 hso_create_rfkill(hso_dev, interface);
2552
2553 return hso_dev;
2554 exit:
2555 hso_free_net_device(hso_dev);
2556 return NULL;
2557 }
2558
2559 static void hso_free_tiomget(struct hso_serial *serial)
2560 {
2561 struct hso_tiocmget *tiocmget;
2562 if (!serial)
2563 return;
2564 tiocmget = serial->tiocmget;
2565 if (tiocmget) {
2566 usb_free_urb(tiocmget->urb);
2567 tiocmget->urb = NULL;
2568 serial->tiocmget = NULL;
2569 kfree(tiocmget->serial_state_notification);
2570 tiocmget->serial_state_notification = NULL;
2571 kfree(tiocmget);
2572 }
2573 }
2574
2575 /* Frees an AT channel ( goes for both mux and non-mux ) */
2576 static void hso_free_serial_device(struct hso_device *hso_dev)
2577 {
2578 struct hso_serial *serial = dev2ser(hso_dev);
2579
2580 if (!serial)
2581 return;
2582
2583 hso_serial_common_free(serial);
2584
2585 if (serial->shared_int) {
2586 mutex_lock(&serial->shared_int->shared_int_lock);
2587 if (--serial->shared_int->ref_count == 0)
2588 hso_free_shared_int(serial->shared_int);
2589 else
2590 mutex_unlock(&serial->shared_int->shared_int_lock);
2591 }
2592 hso_free_tiomget(serial);
2593 kfree(serial);
2594 kfree(hso_dev);
2595 }
2596
2597 /* Creates a bulk AT channel */
2598 static struct hso_device *hso_create_bulk_serial_device(
2599 struct usb_interface *interface, int port)
2600 {
2601 struct hso_device *hso_dev;
2602 struct hso_serial *serial;
2603 int num_urbs;
2604 struct hso_tiocmget *tiocmget;
2605
2606 hso_dev = hso_create_device(interface, port);
2607 if (!hso_dev)
2608 return NULL;
2609
2610 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2611 if (!serial)
2612 goto exit;
2613
2614 serial->parent = hso_dev;
2615 hso_dev->port_data.dev_serial = serial;
2616
2617 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2618 num_urbs = 2;
2619 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2620 GFP_KERNEL);
2621 serial->tiocmget->serial_state_notification
2622 = kzalloc(sizeof(struct hso_serial_state_notification),
2623 GFP_KERNEL);
2624 /* it isn't going to break our heart if serial->tiocmget
2625 * allocation fails don't bother checking this.
2626 */
2627 if (serial->tiocmget && serial->tiocmget->serial_state_notification) {
2628 tiocmget = serial->tiocmget;
2629 tiocmget->endp = hso_get_ep(interface,
2630 USB_ENDPOINT_XFER_INT,
2631 USB_DIR_IN);
2632 if (!tiocmget->endp) {
2633 dev_err(&interface->dev, "Failed to find INT IN ep\n");
2634 goto exit;
2635 }
2636
2637 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2638 if (tiocmget->urb) {
2639 mutex_init(&tiocmget->mutex);
2640 init_waitqueue_head(&tiocmget->waitq);
2641 } else
2642 hso_free_tiomget(serial);
2643 }
2644 }
2645 else
2646 num_urbs = 1;
2647
2648 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2649 BULK_URB_TX_SIZE))
2650 goto exit;
2651
2652 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2653 USB_DIR_IN);
2654 if (!serial->in_endp) {
2655 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2656 goto exit2;
2657 }
2658
2659 if (!
2660 (serial->out_endp =
2661 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2662 dev_err(&interface->dev, "Failed to find BULK OUT ep\n");
2663 goto exit2;
2664 }
2665
2666 serial->write_data = hso_std_serial_write_data;
2667
2668 /* and record this serial */
2669 set_serial_by_index(serial->minor, serial);
2670
2671 /* setup the proc dirs and files if needed */
2672 hso_log_port(hso_dev);
2673
2674 /* done, return it */
2675 return hso_dev;
2676
2677 exit2:
2678 hso_serial_tty_unregister(serial);
2679 hso_serial_common_free(serial);
2680 exit:
2681 hso_free_tiomget(serial);
2682 kfree(serial);
2683 kfree(hso_dev);
2684 return NULL;
2685 }
2686
2687 /* Creates a multiplexed AT channel */
2688 static
2689 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2690 int port,
2691 struct hso_shared_int *mux)
2692 {
2693 struct hso_device *hso_dev;
2694 struct hso_serial *serial;
2695 int port_spec;
2696
2697 port_spec = HSO_INTF_MUX;
2698 port_spec &= ~HSO_PORT_MASK;
2699
2700 port_spec |= hso_mux_to_port(port);
2701 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2702 return NULL;
2703
2704 hso_dev = hso_create_device(interface, port_spec);
2705 if (!hso_dev)
2706 return NULL;
2707
2708 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2709 if (!serial)
2710 goto exit;
2711
2712 hso_dev->port_data.dev_serial = serial;
2713 serial->parent = hso_dev;
2714
2715 if (hso_serial_common_create
2716 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2717 goto exit;
2718
2719 serial->tx_data_length--;
2720 serial->write_data = hso_mux_serial_write_data;
2721
2722 serial->shared_int = mux;
2723 mutex_lock(&serial->shared_int->shared_int_lock);
2724 serial->shared_int->ref_count++;
2725 mutex_unlock(&serial->shared_int->shared_int_lock);
2726
2727 /* and record this serial */
2728 set_serial_by_index(serial->minor, serial);
2729
2730 /* setup the proc dirs and files if needed */
2731 hso_log_port(hso_dev);
2732
2733 /* done, return it */
2734 return hso_dev;
2735
2736 exit:
2737 if (serial) {
2738 tty_unregister_device(tty_drv, serial->minor);
2739 kfree(serial);
2740 }
2741 kfree(hso_dev);
2742 return NULL;
2743
2744 }
2745
2746 static void hso_free_shared_int(struct hso_shared_int *mux)
2747 {
2748 usb_free_urb(mux->shared_intr_urb);
2749 kfree(mux->shared_intr_buf);
2750 mutex_unlock(&mux->shared_int_lock);
2751 kfree(mux);
2752 }
2753
2754 static
2755 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2756 {
2757 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2758
2759 if (!mux)
2760 return NULL;
2761
2762 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2763 USB_DIR_IN);
2764 if (!mux->intr_endp) {
2765 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2766 goto exit;
2767 }
2768
2769 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2770 if (!mux->shared_intr_urb)
2771 goto exit;
2772 mux->shared_intr_buf =
2773 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2774 GFP_KERNEL);
2775 if (!mux->shared_intr_buf)
2776 goto exit;
2777
2778 mutex_init(&mux->shared_int_lock);
2779
2780 return mux;
2781
2782 exit:
2783 kfree(mux->shared_intr_buf);
2784 usb_free_urb(mux->shared_intr_urb);
2785 kfree(mux);
2786 return NULL;
2787 }
2788
2789 /* Gets the port spec for a certain interface */
2790 static int hso_get_config_data(struct usb_interface *interface)
2791 {
2792 struct usb_device *usbdev = interface_to_usbdev(interface);
2793 u8 *config_data = kmalloc(17, GFP_KERNEL);
2794 u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2795 s32 result;
2796
2797 if (!config_data)
2798 return -ENOMEM;
2799 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2800 0x86, 0xC0, 0, 0, config_data, 17,
2801 USB_CTRL_SET_TIMEOUT) != 0x11) {
2802 kfree(config_data);
2803 return -EIO;
2804 }
2805
2806 /* check if we have a valid interface */
2807 if (if_num > 16) {
2808 kfree(config_data);
2809 return -EINVAL;
2810 }
2811
2812 switch (config_data[if_num]) {
2813 case 0x0:
2814 result = 0;
2815 break;
2816 case 0x1:
2817 result = HSO_PORT_DIAG;
2818 break;
2819 case 0x2:
2820 result = HSO_PORT_GPS;
2821 break;
2822 case 0x3:
2823 result = HSO_PORT_GPS_CONTROL;
2824 break;
2825 case 0x4:
2826 result = HSO_PORT_APP;
2827 break;
2828 case 0x5:
2829 result = HSO_PORT_APP2;
2830 break;
2831 case 0x6:
2832 result = HSO_PORT_CONTROL;
2833 break;
2834 case 0x7:
2835 result = HSO_PORT_NETWORK;
2836 break;
2837 case 0x8:
2838 result = HSO_PORT_MODEM;
2839 break;
2840 case 0x9:
2841 result = HSO_PORT_MSD;
2842 break;
2843 case 0xa:
2844 result = HSO_PORT_PCSC;
2845 break;
2846 case 0xb:
2847 result = HSO_PORT_VOICE;
2848 break;
2849 default:
2850 result = 0;
2851 }
2852
2853 if (result)
2854 result |= HSO_INTF_BULK;
2855
2856 if (config_data[16] & 0x1)
2857 result |= HSO_INFO_CRC_BUG;
2858
2859 kfree(config_data);
2860 return result;
2861 }
2862
2863 /* called once for each interface upon device insertion */
2864 static int hso_probe(struct usb_interface *interface,
2865 const struct usb_device_id *id)
2866 {
2867 int mux, i, if_num, port_spec;
2868 unsigned char port_mask;
2869 struct hso_device *hso_dev = NULL;
2870 struct hso_shared_int *shared_int;
2871 struct hso_device *tmp_dev = NULL;
2872
2873 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2874 dev_err(&interface->dev, "Not our interface\n");
2875 return -ENODEV;
2876 }
2877
2878 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
2879
2880 /* Get the interface/port specification from either driver_info or from
2881 * the device itself */
2882 if (id->driver_info) {
2883 /* if_num is controlled by the device, driver_info is a 0 terminated
2884 * array. Make sure, the access is in bounds! */
2885 for (i = 0; i <= if_num; ++i)
2886 if (((u32 *)(id->driver_info))[i] == 0)
2887 goto exit;
2888 port_spec = ((u32 *)(id->driver_info))[if_num];
2889 } else {
2890 port_spec = hso_get_config_data(interface);
2891 if (port_spec < 0)
2892 goto exit;
2893 }
2894
2895 /* Check if we need to switch to alt interfaces prior to port
2896 * configuration */
2897 if (interface->num_altsetting > 1)
2898 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2899 interface->needs_remote_wakeup = 1;
2900
2901 /* Allocate new hso device(s) */
2902 switch (port_spec & HSO_INTF_MASK) {
2903 case HSO_INTF_MUX:
2904 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2905 /* Create the network device */
2906 if (!disable_net) {
2907 hso_dev = hso_create_net_device(interface,
2908 port_spec);
2909 if (!hso_dev)
2910 goto exit;
2911 tmp_dev = hso_dev;
2912 }
2913 }
2914
2915 if (hso_get_mux_ports(interface, &port_mask))
2916 /* TODO: de-allocate everything */
2917 goto exit;
2918
2919 shared_int = hso_create_shared_int(interface);
2920 if (!shared_int)
2921 goto exit;
2922
2923 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2924 if (port_mask & i) {
2925 hso_dev = hso_create_mux_serial_device(
2926 interface, i, shared_int);
2927 if (!hso_dev)
2928 goto exit;
2929 }
2930 }
2931
2932 if (tmp_dev)
2933 hso_dev = tmp_dev;
2934 break;
2935
2936 case HSO_INTF_BULK:
2937 /* It's a regular bulk interface */
2938 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2939 if (!disable_net)
2940 hso_dev =
2941 hso_create_net_device(interface, port_spec);
2942 } else {
2943 hso_dev =
2944 hso_create_bulk_serial_device(interface, port_spec);
2945 }
2946 if (!hso_dev)
2947 goto exit;
2948 break;
2949 default:
2950 goto exit;
2951 }
2952
2953 /* save our data pointer in this device */
2954 usb_set_intfdata(interface, hso_dev);
2955
2956 /* done */
2957 return 0;
2958 exit:
2959 hso_free_interface(interface);
2960 return -ENODEV;
2961 }
2962
2963 /* device removed, cleaning up */
2964 static void hso_disconnect(struct usb_interface *interface)
2965 {
2966 hso_free_interface(interface);
2967
2968 /* remove reference of our private data */
2969 usb_set_intfdata(interface, NULL);
2970 }
2971
2972 static void async_get_intf(struct work_struct *data)
2973 {
2974 struct hso_device *hso_dev =
2975 container_of(data, struct hso_device, async_get_intf);
2976 usb_autopm_get_interface(hso_dev->interface);
2977 }
2978
2979 static void async_put_intf(struct work_struct *data)
2980 {
2981 struct hso_device *hso_dev =
2982 container_of(data, struct hso_device, async_put_intf);
2983 usb_autopm_put_interface(hso_dev->interface);
2984 }
2985
2986 static int hso_get_activity(struct hso_device *hso_dev)
2987 {
2988 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2989 if (!hso_dev->is_active) {
2990 hso_dev->is_active = 1;
2991 schedule_work(&hso_dev->async_get_intf);
2992 }
2993 }
2994
2995 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
2996 return -EAGAIN;
2997
2998 usb_mark_last_busy(hso_dev->usb);
2999
3000 return 0;
3001 }
3002
3003 static int hso_put_activity(struct hso_device *hso_dev)
3004 {
3005 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3006 if (hso_dev->is_active) {
3007 hso_dev->is_active = 0;
3008 schedule_work(&hso_dev->async_put_intf);
3009 return -EAGAIN;
3010 }
3011 }
3012 hso_dev->is_active = 0;
3013 return 0;
3014 }
3015
3016 /* called by kernel when we need to suspend device */
3017 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3018 {
3019 int i, result;
3020
3021 /* Stop all serial ports */
3022 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3023 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3024 result = hso_stop_serial_device(serial_table[i]);
3025 if (result)
3026 goto out;
3027 }
3028 }
3029
3030 /* Stop all network ports */
3031 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3032 if (network_table[i] &&
3033 (network_table[i]->interface == iface)) {
3034 result = hso_stop_net_device(network_table[i]);
3035 if (result)
3036 goto out;
3037 }
3038 }
3039
3040 out:
3041 return 0;
3042 }
3043
3044 /* called by kernel when we need to resume device */
3045 static int hso_resume(struct usb_interface *iface)
3046 {
3047 int i, result = 0;
3048 struct hso_net *hso_net;
3049
3050 /* Start all serial ports */
3051 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3052 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3053 if (dev2ser(serial_table[i])->port.count) {
3054 result =
3055 hso_start_serial_device(serial_table[i], GFP_NOIO);
3056 hso_kick_transmit(dev2ser(serial_table[i]));
3057 if (result)
3058 goto out;
3059 }
3060 }
3061 }
3062
3063 /* Start all network ports */
3064 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3065 if (network_table[i] &&
3066 (network_table[i]->interface == iface)) {
3067 hso_net = dev2net(network_table[i]);
3068 if (hso_net->flags & IFF_UP) {
3069 /* First transmit any lingering data,
3070 then restart the device. */
3071 if (hso_net->skb_tx_buf) {
3072 dev_dbg(&iface->dev,
3073 "Transmitting"
3074 " lingering data\n");
3075 hso_net_start_xmit(hso_net->skb_tx_buf,
3076 hso_net->net);
3077 hso_net->skb_tx_buf = NULL;
3078 }
3079 result = hso_start_net_device(network_table[i]);
3080 if (result)
3081 goto out;
3082 }
3083 }
3084 }
3085
3086 out:
3087 return result;
3088 }
3089
3090 static void hso_serial_ref_free(struct kref *ref)
3091 {
3092 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3093
3094 hso_free_serial_device(hso_dev);
3095 }
3096
3097 static void hso_free_interface(struct usb_interface *interface)
3098 {
3099 struct hso_serial *serial;
3100 int i;
3101
3102 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3103 if (serial_table[i] &&
3104 (serial_table[i]->interface == interface)) {
3105 serial = dev2ser(serial_table[i]);
3106 tty_port_tty_hangup(&serial->port, false);
3107 mutex_lock(&serial->parent->mutex);
3108 serial->parent->usb_gone = 1;
3109 mutex_unlock(&serial->parent->mutex);
3110 cancel_work_sync(&serial_table[i]->async_put_intf);
3111 cancel_work_sync(&serial_table[i]->async_get_intf);
3112 hso_serial_tty_unregister(serial);
3113 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3114 set_serial_by_index(i, NULL);
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 ! */
3140 static 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 */
3158 static 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 */
3179 static 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 */
3201 static 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
3216 static 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
3228 static int __init hso_init(void)
3229 {
3230 int i;
3231 int result;
3232
3233 /* put it in the log */
3234 pr_info("%s\n", version);
3235
3236 /* Initialise the serial table semaphore and table */
3237 spin_lock_init(&serial_table_lock);
3238 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3239 serial_table[i] = NULL;
3240
3241 /* allocate our driver using the proper amount of supported minors */
3242 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3243 if (!tty_drv)
3244 return -ENOMEM;
3245
3246 /* fill in all needed values */
3247 tty_drv->driver_name = driver_name;
3248 tty_drv->name = tty_filename;
3249
3250 /* if major number is provided as parameter, use that one */
3251 if (tty_major)
3252 tty_drv->major = tty_major;
3253
3254 tty_drv->minor_start = 0;
3255 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3256 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3257 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3258 tty_drv->init_termios = tty_std_termios;
3259 hso_init_termios(&tty_drv->init_termios);
3260 tty_set_operations(tty_drv, &hso_serial_ops);
3261
3262 /* register the tty driver */
3263 result = tty_register_driver(tty_drv);
3264 if (result) {
3265 pr_err("%s - tty_register_driver failed(%d)\n",
3266 __func__, result);
3267 goto err_free_tty;
3268 }
3269
3270 /* register this module as an usb driver */
3271 result = usb_register(&hso_driver);
3272 if (result) {
3273 pr_err("Could not register hso driver - error: %d\n", result);
3274 goto err_unreg_tty;
3275 }
3276
3277 /* done */
3278 return 0;
3279 err_unreg_tty:
3280 tty_unregister_driver(tty_drv);
3281 err_free_tty:
3282 put_tty_driver(tty_drv);
3283 return result;
3284 }
3285
3286 static void __exit hso_exit(void)
3287 {
3288 pr_info("unloaded\n");
3289
3290 tty_unregister_driver(tty_drv);
3291 /* deregister the usb driver */
3292 usb_deregister(&hso_driver);
3293 put_tty_driver(tty_drv);
3294 }
3295
3296 /* Module definitions */
3297 module_init(hso_init);
3298 module_exit(hso_exit);
3299
3300 MODULE_AUTHOR(MOD_AUTHOR);
3301 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3302 MODULE_LICENSE("GPL");
3303
3304 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3305 MODULE_PARM_DESC(debug, "debug level mask [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3306 module_param(debug, int, 0644);
3307
3308 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3309 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3310 module_param(tty_major, int, 0644);
3311
3312 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3313 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3314 module_param(disable_net, int, 0644);
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