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wl1251: use wiphy_dev instead of wl->spi->dev
[linux/fpc-iii.git] / drivers / net / usb / hso.c
blobffe41063573588aa72f30d15ff01f1386f2dbe49
1 /******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
6 * Filip Aben <f.aben@option.com>
7 * Denis Joseph Barrow <d.barow@option.com>
8 * Jan Dumon <j.dumon@option.com>
9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
10 * <ajb@spheresystems.co.uk>
11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
12 * Copyright (C) 2008 Novell, Inc.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
26 * USA
27 *
28 *
29 *****************************************************************************/
30
31 /******************************************************************************
32 *
33 * Description of the device:
34 *
35 * Interface 0: Contains the IP network interface on the bulk end points.
36 * The multiplexed serial ports are using the interrupt and
37 * control endpoints.
38 * Interrupt contains a bitmap telling which multiplexed
39 * serialport needs servicing.
40 *
41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
42 * port is opened, as this have a huge impact on the network port
43 * throughput.
44 *
45 * Interface 2: Standard modem interface - circuit switched interface, this
46 * can be used to make a standard ppp connection however it
47 * should not be used in conjunction with the IP network interface
48 * enabled for USB performance reasons i.e. if using this set
49 * ideally disable_net=1.
50 *
51 *****************************************************************************/
52
53 #include <linux/sched.h>
54 #include <linux/slab.h>
55 #include <linux/init.h>
56 #include <linux/delay.h>
57 #include <linux/netdevice.h>
58 #include <linux/module.h>
59 #include <linux/ethtool.h>
60 #include <linux/usb.h>
61 #include <linux/timer.h>
62 #include <linux/tty.h>
63 #include <linux/tty_driver.h>
64 #include <linux/tty_flip.h>
65 #include <linux/kmod.h>
66 #include <linux/rfkill.h>
67 #include <linux/ip.h>
68 #include <linux/uaccess.h>
69 #include <linux/usb/cdc.h>
70 #include <net/arp.h>
71 #include <asm/byteorder.h>
72 #include <linux/serial_core.h>
73 #include <linux/serial.h>
74
75
76 #define DRIVER_VERSION "1.2"
77 #define MOD_AUTHOR "Option Wireless"
78 #define MOD_DESCRIPTION "USB High Speed Option driver"
79 #define MOD_LICENSE "GPL"
80
81 #define HSO_MAX_NET_DEVICES 10
82 #define HSO__MAX_MTU 2048
83 #define DEFAULT_MTU 1500
84 #define DEFAULT_MRU 1500
85
86 #define CTRL_URB_RX_SIZE 1024
87 #define CTRL_URB_TX_SIZE 64
88
89 #define BULK_URB_RX_SIZE 4096
90 #define BULK_URB_TX_SIZE 8192
91
92 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
93 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
94 #define MUX_BULK_RX_BUF_COUNT 4
95 #define USB_TYPE_OPTION_VENDOR 0x20
96
97 /* These definitions are used with the struct hso_net flags element */
98 /* - use *_bit operations on it. (bit indices not values.) */
99 #define HSO_NET_RUNNING 0
100
101 #define HSO_NET_TX_TIMEOUT (HZ*10)
102
103 #define HSO_SERIAL_MAGIC 0x48534f31
104
105 /* Number of ttys to handle */
106 #define HSO_SERIAL_TTY_MINORS 256
107
108 #define MAX_RX_URBS 2
109
110 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
111 {
112 if (tty)
113 return tty->driver_data;
114 return NULL;
115 }
116
117 /*****************************************************************************/
118 /* Debugging functions */
119 /*****************************************************************************/
120 #define D__(lvl_, fmt, arg...) \
121 do { \
122 printk(lvl_ "[%d:%s]: " fmt "\n", \
123 __LINE__, __func__, ## arg); \
124 } while (0)
125
126 #define D_(lvl, args...) \
127 do { \
128 if (lvl & debug) \
129 D__(KERN_INFO, args); \
130 } while (0)
131
132 #define D1(args...) D_(0x01, ##args)
133 #define D2(args...) D_(0x02, ##args)
134 #define D3(args...) D_(0x04, ##args)
135 #define D4(args...) D_(0x08, ##args)
136 #define D5(args...) D_(0x10, ##args)
137
138 /*****************************************************************************/
139 /* Enumerators */
140 /*****************************************************************************/
141 enum pkt_parse_state {
142 WAIT_IP,
143 WAIT_DATA,
144 WAIT_SYNC
145 };
146
147 /*****************************************************************************/
148 /* Structs */
149 /*****************************************************************************/
150
151 struct hso_shared_int {
152 struct usb_endpoint_descriptor *intr_endp;
153 void *shared_intr_buf;
154 struct urb *shared_intr_urb;
155 struct usb_device *usb;
156 int use_count;
157 int ref_count;
158 struct mutex shared_int_lock;
159 };
160
161 struct hso_net {
162 struct hso_device *parent;
163 struct net_device *net;
164 struct rfkill *rfkill;
165
166 struct usb_endpoint_descriptor *in_endp;
167 struct usb_endpoint_descriptor *out_endp;
168
169 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
170 struct urb *mux_bulk_tx_urb;
171 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
172 void *mux_bulk_tx_buf;
173
174 struct sk_buff *skb_rx_buf;
175 struct sk_buff *skb_tx_buf;
176
177 enum pkt_parse_state rx_parse_state;
178 spinlock_t net_lock;
179
180 unsigned short rx_buf_size;
181 unsigned short rx_buf_missing;
182 struct iphdr rx_ip_hdr;
183
184 unsigned long flags;
185 };
186
187 enum rx_ctrl_state{
188 RX_IDLE,
189 RX_SENT,
190 RX_PENDING
191 };
192
193 #define BM_REQUEST_TYPE (0xa1)
194 #define B_NOTIFICATION (0x20)
195 #define W_VALUE (0x0)
196 #define W_INDEX (0x2)
197 #define W_LENGTH (0x2)
198
199 #define B_OVERRUN (0x1<<6)
200 #define B_PARITY (0x1<<5)
201 #define B_FRAMING (0x1<<4)
202 #define B_RING_SIGNAL (0x1<<3)
203 #define B_BREAK (0x1<<2)
204 #define B_TX_CARRIER (0x1<<1)
205 #define B_RX_CARRIER (0x1<<0)
206
207 struct hso_serial_state_notification {
208 u8 bmRequestType;
209 u8 bNotification;
210 u16 wValue;
211 u16 wIndex;
212 u16 wLength;
213 u16 UART_state_bitmap;
214 } __attribute__((packed));
215
216 struct hso_tiocmget {
217 struct mutex mutex;
218 wait_queue_head_t waitq;
219 int intr_completed;
220 struct usb_endpoint_descriptor *endp;
221 struct urb *urb;
222 struct hso_serial_state_notification serial_state_notification;
223 u16 prev_UART_state_bitmap;
224 struct uart_icount icount;
225 };
226
227
228 struct hso_serial {
229 struct hso_device *parent;
230 int magic;
231 u8 minor;
232
233 struct hso_shared_int *shared_int;
234
235 /* rx/tx urb could be either a bulk urb or a control urb depending
236 on which serial port it is used on. */
237 struct urb *rx_urb[MAX_RX_URBS];
238 u8 num_rx_urbs;
239 u8 *rx_data[MAX_RX_URBS];
240 u16 rx_data_length; /* should contain allocated length */
241
242 struct urb *tx_urb;
243 u8 *tx_data;
244 u8 *tx_buffer;
245 u16 tx_data_length; /* should contain allocated length */
246 u16 tx_data_count;
247 u16 tx_buffer_count;
248 struct usb_ctrlrequest ctrl_req_tx;
249 struct usb_ctrlrequest ctrl_req_rx;
250
251 struct usb_endpoint_descriptor *in_endp;
252 struct usb_endpoint_descriptor *out_endp;
253
254 enum rx_ctrl_state rx_state;
255 u8 rts_state;
256 u8 dtr_state;
257 unsigned tx_urb_used:1;
258
259 /* from usb_serial_port */
260 struct tty_struct *tty;
261 int open_count;
262 spinlock_t serial_lock;
263
264 int (*write_data) (struct hso_serial *serial);
265 struct hso_tiocmget *tiocmget;
266 /* Hacks required to get flow control
267 * working on the serial receive buffers
268 * so as not to drop characters on the floor.
269 */
270 int curr_rx_urb_idx;
271 u16 curr_rx_urb_offset;
272 u8 rx_urb_filled[MAX_RX_URBS];
273 struct tasklet_struct unthrottle_tasklet;
274 struct work_struct retry_unthrottle_workqueue;
275 };
276
277 struct hso_device {
278 union {
279 struct hso_serial *dev_serial;
280 struct hso_net *dev_net;
281 } port_data;
282
283 u32 port_spec;
284
285 u8 is_active;
286 u8 usb_gone;
287 struct work_struct async_get_intf;
288 struct work_struct async_put_intf;
289
290 struct usb_device *usb;
291 struct usb_interface *interface;
292
293 struct device *dev;
294 struct kref ref;
295 struct mutex mutex;
296 };
297
298 /* Type of interface */
299 #define HSO_INTF_MASK 0xFF00
300 #define HSO_INTF_MUX 0x0100
301 #define HSO_INTF_BULK 0x0200
302
303 /* Type of port */
304 #define HSO_PORT_MASK 0xFF
305 #define HSO_PORT_NO_PORT 0x0
306 #define HSO_PORT_CONTROL 0x1
307 #define HSO_PORT_APP 0x2
308 #define HSO_PORT_GPS 0x3
309 #define HSO_PORT_PCSC 0x4
310 #define HSO_PORT_APP2 0x5
311 #define HSO_PORT_GPS_CONTROL 0x6
312 #define HSO_PORT_MSD 0x7
313 #define HSO_PORT_VOICE 0x8
314 #define HSO_PORT_DIAG2 0x9
315 #define HSO_PORT_DIAG 0x10
316 #define HSO_PORT_MODEM 0x11
317 #define HSO_PORT_NETWORK 0x12
318
319 /* Additional device info */
320 #define HSO_INFO_MASK 0xFF000000
321 #define HSO_INFO_CRC_BUG 0x01000000
322
323 /*****************************************************************************/
324 /* Prototypes */
325 /*****************************************************************************/
326 /* Serial driver functions */
327 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
328 unsigned int set, unsigned int clear);
329 static void ctrl_callback(struct urb *urb);
330 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
331 static void hso_kick_transmit(struct hso_serial *serial);
332 /* Helper functions */
333 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
334 struct usb_device *usb, gfp_t gfp);
335 static void log_usb_status(int status, const char *function);
336 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
337 int type, int dir);
338 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
339 static void hso_free_interface(struct usb_interface *intf);
340 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
341 static int hso_stop_serial_device(struct hso_device *hso_dev);
342 static int hso_start_net_device(struct hso_device *hso_dev);
343 static void hso_free_shared_int(struct hso_shared_int *shared_int);
344 static int hso_stop_net_device(struct hso_device *hso_dev);
345 static void hso_serial_ref_free(struct kref *ref);
346 static void hso_std_serial_read_bulk_callback(struct urb *urb);
347 static int hso_mux_serial_read(struct hso_serial *serial);
348 static void async_get_intf(struct work_struct *data);
349 static void async_put_intf(struct work_struct *data);
350 static int hso_put_activity(struct hso_device *hso_dev);
351 static int hso_get_activity(struct hso_device *hso_dev);
352 static void tiocmget_intr_callback(struct urb *urb);
353 /*****************************************************************************/
354 /* Helping functions */
355 /*****************************************************************************/
356
357 /* #define DEBUG */
358
359 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
360 {
361 return hso_dev->port_data.dev_net;
362 }
363
364 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
365 {
366 return hso_dev->port_data.dev_serial;
367 }
368
369 /* Debugging functions */
370 #ifdef DEBUG
371 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
372 unsigned int len)
373 {
374 static char name[255];
375
376 sprintf(name, "hso[%d:%s]", line_count, func_name);
377 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
378 }
379
380 #define DUMP(buf_, len_) \
381 dbg_dump(__LINE__, __func__, buf_, len_)
382
383 #define DUMP1(buf_, len_) \
384 do { \
385 if (0x01 & debug) \
386 DUMP(buf_, len_); \
387 } while (0)
388 #else
389 #define DUMP(buf_, len_)
390 #define DUMP1(buf_, len_)
391 #endif
392
393 /* module parameters */
394 static int debug;
395 static int tty_major;
396 static int disable_net;
397
398 /* driver info */
399 static const char driver_name[] = "hso";
400 static const char tty_filename[] = "ttyHS";
401 static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
402 /* the usb driver itself (registered in hso_init) */
403 static struct usb_driver hso_driver;
404 /* serial structures */
405 static struct tty_driver *tty_drv;
406 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
407 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
408 static spinlock_t serial_table_lock;
409
410 static const s32 default_port_spec[] = {
411 HSO_INTF_MUX | HSO_PORT_NETWORK,
412 HSO_INTF_BULK | HSO_PORT_DIAG,
413 HSO_INTF_BULK | HSO_PORT_MODEM,
414 0
415 };
416
417 static const s32 icon321_port_spec[] = {
418 HSO_INTF_MUX | HSO_PORT_NETWORK,
419 HSO_INTF_BULK | HSO_PORT_DIAG2,
420 HSO_INTF_BULK | HSO_PORT_MODEM,
421 HSO_INTF_BULK | HSO_PORT_DIAG,
422 0
423 };
424
425 #define default_port_device(vendor, product) \
426 USB_DEVICE(vendor, product), \
427 .driver_info = (kernel_ulong_t)default_port_spec
428
429 #define icon321_port_device(vendor, product) \
430 USB_DEVICE(vendor, product), \
431 .driver_info = (kernel_ulong_t)icon321_port_spec
432
433 /* list of devices we support */
434 static const struct usb_device_id hso_ids[] = {
435 {default_port_device(0x0af0, 0x6711)},
436 {default_port_device(0x0af0, 0x6731)},
437 {default_port_device(0x0af0, 0x6751)},
438 {default_port_device(0x0af0, 0x6771)},
439 {default_port_device(0x0af0, 0x6791)},
440 {default_port_device(0x0af0, 0x6811)},
441 {default_port_device(0x0af0, 0x6911)},
442 {default_port_device(0x0af0, 0x6951)},
443 {default_port_device(0x0af0, 0x6971)},
444 {default_port_device(0x0af0, 0x7011)},
445 {default_port_device(0x0af0, 0x7031)},
446 {default_port_device(0x0af0, 0x7051)},
447 {default_port_device(0x0af0, 0x7071)},
448 {default_port_device(0x0af0, 0x7111)},
449 {default_port_device(0x0af0, 0x7211)},
450 {default_port_device(0x0af0, 0x7251)},
451 {default_port_device(0x0af0, 0x7271)},
452 {default_port_device(0x0af0, 0x7311)},
453 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
454 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
455 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
456 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
457 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
458 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
459 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
460 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
461 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
462 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
463 {USB_DEVICE(0x0af0, 0x7701)},
464 {USB_DEVICE(0x0af0, 0x7801)},
465 {USB_DEVICE(0x0af0, 0x7901)},
466 {USB_DEVICE(0x0af0, 0x8200)},
467 {USB_DEVICE(0x0af0, 0x8201)},
468 {USB_DEVICE(0x0af0, 0xd035)},
469 {USB_DEVICE(0x0af0, 0xd055)},
470 {USB_DEVICE(0x0af0, 0xd155)},
471 {USB_DEVICE(0x0af0, 0xd255)},
472 {USB_DEVICE(0x0af0, 0xd057)},
473 {USB_DEVICE(0x0af0, 0xd157)},
474 {USB_DEVICE(0x0af0, 0xd257)},
475 {USB_DEVICE(0x0af0, 0xd357)},
476 {}
477 };
478 MODULE_DEVICE_TABLE(usb, hso_ids);
479
480 /* Sysfs attribute */
481 static ssize_t hso_sysfs_show_porttype(struct device *dev,
482 struct device_attribute *attr,
483 char *buf)
484 {
485 struct hso_device *hso_dev = dev_get_drvdata(dev);
486 char *port_name;
487
488 if (!hso_dev)
489 return 0;
490
491 switch (hso_dev->port_spec & HSO_PORT_MASK) {
492 case HSO_PORT_CONTROL:
493 port_name = "Control";
494 break;
495 case HSO_PORT_APP:
496 port_name = "Application";
497 break;
498 case HSO_PORT_APP2:
499 port_name = "Application2";
500 break;
501 case HSO_PORT_GPS:
502 port_name = "GPS";
503 break;
504 case HSO_PORT_GPS_CONTROL:
505 port_name = "GPS Control";
506 break;
507 case HSO_PORT_PCSC:
508 port_name = "PCSC";
509 break;
510 case HSO_PORT_DIAG:
511 port_name = "Diagnostic";
512 break;
513 case HSO_PORT_DIAG2:
514 port_name = "Diagnostic2";
515 break;
516 case HSO_PORT_MODEM:
517 port_name = "Modem";
518 break;
519 case HSO_PORT_NETWORK:
520 port_name = "Network";
521 break;
522 default:
523 port_name = "Unknown";
524 break;
525 }
526
527 return sprintf(buf, "%s\n", port_name);
528 }
529 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
530
531 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
532 {
533 int idx;
534
535 for (idx = 0; idx < serial->num_rx_urbs; idx++)
536 if (serial->rx_urb[idx] == urb)
537 return idx;
538 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
539 return -1;
540 }
541
542 /* converts mux value to a port spec value */
543 static u32 hso_mux_to_port(int mux)
544 {
545 u32 result;
546
547 switch (mux) {
548 case 0x1:
549 result = HSO_PORT_CONTROL;
550 break;
551 case 0x2:
552 result = HSO_PORT_APP;
553 break;
554 case 0x4:
555 result = HSO_PORT_PCSC;
556 break;
557 case 0x8:
558 result = HSO_PORT_GPS;
559 break;
560 case 0x10:
561 result = HSO_PORT_APP2;
562 break;
563 default:
564 result = HSO_PORT_NO_PORT;
565 }
566 return result;
567 }
568
569 /* converts port spec value to a mux value */
570 static u32 hso_port_to_mux(int port)
571 {
572 u32 result;
573
574 switch (port & HSO_PORT_MASK) {
575 case HSO_PORT_CONTROL:
576 result = 0x0;
577 break;
578 case HSO_PORT_APP:
579 result = 0x1;
580 break;
581 case HSO_PORT_PCSC:
582 result = 0x2;
583 break;
584 case HSO_PORT_GPS:
585 result = 0x3;
586 break;
587 case HSO_PORT_APP2:
588 result = 0x4;
589 break;
590 default:
591 result = 0x0;
592 }
593 return result;
594 }
595
596 static struct hso_serial *get_serial_by_shared_int_and_type(
597 struct hso_shared_int *shared_int,
598 int mux)
599 {
600 int i, port;
601
602 port = hso_mux_to_port(mux);
603
604 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
605 if (serial_table[i]
606 && (dev2ser(serial_table[i])->shared_int == shared_int)
607 && ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
608 return dev2ser(serial_table[i]);
609 }
610 }
611
612 return NULL;
613 }
614
615 static struct hso_serial *get_serial_by_index(unsigned index)
616 {
617 struct hso_serial *serial = NULL;
618 unsigned long flags;
619
620 spin_lock_irqsave(&serial_table_lock, flags);
621 if (serial_table[index])
622 serial = dev2ser(serial_table[index]);
623 spin_unlock_irqrestore(&serial_table_lock, flags);
624
625 return serial;
626 }
627
628 static int get_free_serial_index(void)
629 {
630 int index;
631 unsigned long flags;
632
633 spin_lock_irqsave(&serial_table_lock, flags);
634 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
635 if (serial_table[index] == NULL) {
636 spin_unlock_irqrestore(&serial_table_lock, flags);
637 return index;
638 }
639 }
640 spin_unlock_irqrestore(&serial_table_lock, flags);
641
642 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
643 return -1;
644 }
645
646 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
647 {
648 unsigned long flags;
649
650 spin_lock_irqsave(&serial_table_lock, flags);
651 if (serial)
652 serial_table[index] = serial->parent;
653 else
654 serial_table[index] = NULL;
655 spin_unlock_irqrestore(&serial_table_lock, flags);
656 }
657
658 /* log a meaningful explanation of an USB status */
659 static void log_usb_status(int status, const char *function)
660 {
661 char *explanation;
662
663 switch (status) {
664 case -ENODEV:
665 explanation = "no device";
666 break;
667 case -ENOENT:
668 explanation = "endpoint not enabled";
669 break;
670 case -EPIPE:
671 explanation = "endpoint stalled";
672 break;
673 case -ENOSPC:
674 explanation = "not enough bandwidth";
675 break;
676 case -ESHUTDOWN:
677 explanation = "device disabled";
678 break;
679 case -EHOSTUNREACH:
680 explanation = "device suspended";
681 break;
682 case -EINVAL:
683 case -EAGAIN:
684 case -EFBIG:
685 case -EMSGSIZE:
686 explanation = "internal error";
687 break;
688 default:
689 explanation = "unknown status";
690 break;
691 }
692 D1("%s: received USB status - %s (%d)", function, explanation, status);
693 }
694
695 /* Network interface functions */
696
697 /* called when net interface is brought up by ifconfig */
698 static int hso_net_open(struct net_device *net)
699 {
700 struct hso_net *odev = netdev_priv(net);
701 unsigned long flags = 0;
702
703 if (!odev) {
704 dev_err(&net->dev, "No net device !\n");
705 return -ENODEV;
706 }
707
708 odev->skb_tx_buf = NULL;
709
710 /* setup environment */
711 spin_lock_irqsave(&odev->net_lock, flags);
712 odev->rx_parse_state = WAIT_IP;
713 odev->rx_buf_size = 0;
714 odev->rx_buf_missing = sizeof(struct iphdr);
715 spin_unlock_irqrestore(&odev->net_lock, flags);
716
717 /* We are up and running. */
718 set_bit(HSO_NET_RUNNING, &odev->flags);
719 hso_start_net_device(odev->parent);
720
721 /* Tell the kernel we are ready to start receiving from it */
722 netif_start_queue(net);
723
724 return 0;
725 }
726
727 /* called when interface is brought down by ifconfig */
728 static int hso_net_close(struct net_device *net)
729 {
730 struct hso_net *odev = netdev_priv(net);
731
732 /* we don't need the queue anymore */
733 netif_stop_queue(net);
734 /* no longer running */
735 clear_bit(HSO_NET_RUNNING, &odev->flags);
736
737 hso_stop_net_device(odev->parent);
738
739 /* done */
740 return 0;
741 }
742
743 /* USB tells is xmit done, we should start the netqueue again */
744 static void write_bulk_callback(struct urb *urb)
745 {
746 struct hso_net *odev = urb->context;
747 int status = urb->status;
748
749 /* Sanity check */
750 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
751 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
752 return;
753 }
754
755 /* Do we still have a valid kernel network device? */
756 if (!netif_device_present(odev->net)) {
757 dev_err(&urb->dev->dev, "%s: net device not present\n",
758 __func__);
759 return;
760 }
761
762 /* log status, but don't act on it, we don't need to resubmit anything
763 * anyhow */
764 if (status)
765 log_usb_status(status, __func__);
766
767 hso_put_activity(odev->parent);
768
769 /* Tell the network interface we are ready for another frame */
770 netif_wake_queue(odev->net);
771 }
772
773 /* called by kernel when we need to transmit a packet */
774 static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net)
775 {
776 struct hso_net *odev = netdev_priv(net);
777 int result;
778
779 /* Tell the kernel, "No more frames 'til we are done with this one." */
780 netif_stop_queue(net);
781 if (hso_get_activity(odev->parent) == -EAGAIN) {
782 odev->skb_tx_buf = skb;
783 return NETDEV_TX_OK;
784 }
785
786 /* log if asked */
787 DUMP1(skb->data, skb->len);
788 /* Copy it from kernel memory to OUR memory */
789 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
790 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
791
792 /* Fill in the URB for shipping it out. */
793 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
794 odev->parent->usb,
795 usb_sndbulkpipe(odev->parent->usb,
796 odev->out_endp->
797 bEndpointAddress & 0x7F),
798 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
799 odev);
800
801 /* Deal with the Zero Length packet problem, I hope */
802 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
803
804 /* Send the URB on its merry way. */
805 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
806 if (result) {
807 dev_warn(&odev->parent->interface->dev,
808 "failed mux_bulk_tx_urb %d", result);
809 net->stats.tx_errors++;
810 netif_start_queue(net);
811 } else {
812 net->stats.tx_packets++;
813 net->stats.tx_bytes += skb->len;
814 /* And tell the kernel when the last transmit started. */
815 net->trans_start = jiffies;
816 }
817 dev_kfree_skb(skb);
818 /* we're done */
819 return NETDEV_TX_OK;
820 }
821
822 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
823 {
824 struct hso_net *odev = netdev_priv(net);
825
826 strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
827 strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
828 usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
829 }
830
831 static struct ethtool_ops ops = {
832 .get_drvinfo = hso_get_drvinfo,
833 .get_link = ethtool_op_get_link
834 };
835
836 /* called when a packet did not ack after watchdogtimeout */
837 static void hso_net_tx_timeout(struct net_device *net)
838 {
839 struct hso_net *odev = netdev_priv(net);
840
841 if (!odev)
842 return;
843
844 /* Tell syslog we are hosed. */
845 dev_warn(&net->dev, "Tx timed out.\n");
846
847 /* Tear the waiting frame off the list */
848 if (odev->mux_bulk_tx_urb
849 && (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
850 usb_unlink_urb(odev->mux_bulk_tx_urb);
851
852 /* Update statistics */
853 net->stats.tx_errors++;
854 }
855
856 /* make a real packet from the received USB buffer */
857 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
858 unsigned int count, unsigned char is_eop)
859 {
860 unsigned short temp_bytes;
861 unsigned short buffer_offset = 0;
862 unsigned short frame_len;
863 unsigned char *tmp_rx_buf;
864
865 /* log if needed */
866 D1("Rx %d bytes", count);
867 DUMP(ip_pkt, min(128, (int)count));
868
869 while (count) {
870 switch (odev->rx_parse_state) {
871 case WAIT_IP:
872 /* waiting for IP header. */
873 /* wanted bytes - size of ip header */
874 temp_bytes =
875 (count <
876 odev->rx_buf_missing) ? count : odev->
877 rx_buf_missing;
878
879 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
880 odev->rx_buf_size, ip_pkt + buffer_offset,
881 temp_bytes);
882
883 odev->rx_buf_size += temp_bytes;
884 buffer_offset += temp_bytes;
885 odev->rx_buf_missing -= temp_bytes;
886 count -= temp_bytes;
887
888 if (!odev->rx_buf_missing) {
889 /* header is complete allocate an sk_buffer and
890 * continue to WAIT_DATA */
891 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
892
893 if ((frame_len > DEFAULT_MRU) ||
894 (frame_len < sizeof(struct iphdr))) {
895 dev_err(&odev->net->dev,
896 "Invalid frame (%d) length\n",
897 frame_len);
898 odev->rx_parse_state = WAIT_SYNC;
899 continue;
900 }
901 /* Allocate an sk_buff */
902 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
903 frame_len);
904 if (!odev->skb_rx_buf) {
905 /* We got no receive buffer. */
906 D1("could not allocate memory");
907 odev->rx_parse_state = WAIT_SYNC;
908 return;
909 }
910
911 /* Copy what we got so far. make room for iphdr
912 * after tail. */
913 tmp_rx_buf =
914 skb_put(odev->skb_rx_buf,
915 sizeof(struct iphdr));
916 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
917 sizeof(struct iphdr));
918
919 /* ETH_HLEN */
920 odev->rx_buf_size = sizeof(struct iphdr);
921
922 /* Filip actually use .tot_len */
923 odev->rx_buf_missing =
924 frame_len - sizeof(struct iphdr);
925 odev->rx_parse_state = WAIT_DATA;
926 }
927 break;
928
929 case WAIT_DATA:
930 temp_bytes = (count < odev->rx_buf_missing)
931 ? count : odev->rx_buf_missing;
932
933 /* Copy the rest of the bytes that are left in the
934 * buffer into the waiting sk_buf. */
935 /* Make room for temp_bytes after tail. */
936 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
937 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
938
939 odev->rx_buf_missing -= temp_bytes;
940 count -= temp_bytes;
941 buffer_offset += temp_bytes;
942 odev->rx_buf_size += temp_bytes;
943 if (!odev->rx_buf_missing) {
944 /* Packet is complete. Inject into stack. */
945 /* We have IP packet here */
946 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
947 /* don't check it */
948 odev->skb_rx_buf->ip_summed =
949 CHECKSUM_UNNECESSARY;
950
951 skb_reset_mac_header(odev->skb_rx_buf);
952
953 /* Ship it off to the kernel */
954 netif_rx(odev->skb_rx_buf);
955 /* No longer our buffer. */
956 odev->skb_rx_buf = NULL;
957
958 /* update out statistics */
959 odev->net->stats.rx_packets++;
960
961 odev->net->stats.rx_bytes += odev->rx_buf_size;
962
963 odev->rx_buf_size = 0;
964 odev->rx_buf_missing = sizeof(struct iphdr);
965 odev->rx_parse_state = WAIT_IP;
966 }
967 break;
968
969 case WAIT_SYNC:
970 D1(" W_S");
971 count = 0;
972 break;
973 default:
974 D1(" ");
975 count--;
976 break;
977 }
978 }
979
980 /* Recovery mechanism for WAIT_SYNC state. */
981 if (is_eop) {
982 if (odev->rx_parse_state == WAIT_SYNC) {
983 odev->rx_parse_state = WAIT_IP;
984 odev->rx_buf_size = 0;
985 odev->rx_buf_missing = sizeof(struct iphdr);
986 }
987 }
988 }
989
990 /* Moving data from usb to kernel (in interrupt state) */
991 static void read_bulk_callback(struct urb *urb)
992 {
993 struct hso_net *odev = urb->context;
994 struct net_device *net;
995 int result;
996 int status = urb->status;
997
998 /* is al ok? (Filip: Who's Al ?) */
999 if (status) {
1000 log_usb_status(status, __func__);
1001 return;
1002 }
1003
1004 /* Sanity check */
1005 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1006 D1("BULK IN callback but driver is not active!");
1007 return;
1008 }
1009 usb_mark_last_busy(urb->dev);
1010
1011 net = odev->net;
1012
1013 if (!netif_device_present(net)) {
1014 /* Somebody killed our network interface... */
1015 return;
1016 }
1017
1018 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1019 u32 rest;
1020 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1021 rest = urb->actual_length % odev->in_endp->wMaxPacketSize;
1022 if (((rest == 5) || (rest == 6))
1023 && !memcmp(((u8 *) urb->transfer_buffer) +
1024 urb->actual_length - 4, crc_check, 4)) {
1025 urb->actual_length -= 4;
1026 }
1027 }
1028
1029 /* do we even have a packet? */
1030 if (urb->actual_length) {
1031 /* Handle the IP stream, add header and push it onto network
1032 * stack if the packet is complete. */
1033 spin_lock(&odev->net_lock);
1034 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1035 (urb->transfer_buffer_length >
1036 urb->actual_length) ? 1 : 0);
1037 spin_unlock(&odev->net_lock);
1038 }
1039
1040 /* We are done with this URB, resubmit it. Prep the USB to wait for
1041 * another frame. Reuse same as received. */
1042 usb_fill_bulk_urb(urb,
1043 odev->parent->usb,
1044 usb_rcvbulkpipe(odev->parent->usb,
1045 odev->in_endp->
1046 bEndpointAddress & 0x7F),
1047 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1048 read_bulk_callback, odev);
1049
1050 /* Give this to the USB subsystem so it can tell us when more data
1051 * arrives. */
1052 result = usb_submit_urb(urb, GFP_ATOMIC);
1053 if (result)
1054 dev_warn(&odev->parent->interface->dev,
1055 "%s failed submit mux_bulk_rx_urb %d", __func__,
1056 result);
1057 }
1058
1059 /* Serial driver functions */
1060
1061 static void hso_init_termios(struct ktermios *termios)
1062 {
1063 /*
1064 * The default requirements for this device are:
1065 */
1066 termios->c_iflag &=
1067 ~(IGNBRK /* disable ignore break */
1068 | BRKINT /* disable break causes interrupt */
1069 | PARMRK /* disable mark parity errors */
1070 | ISTRIP /* disable clear high bit of input characters */
1071 | INLCR /* disable translate NL to CR */
1072 | IGNCR /* disable ignore CR */
1073 | ICRNL /* disable translate CR to NL */
1074 | IXON); /* disable enable XON/XOFF flow control */
1075
1076 /* disable postprocess output characters */
1077 termios->c_oflag &= ~OPOST;
1078
1079 termios->c_lflag &=
1080 ~(ECHO /* disable echo input characters */
1081 | ECHONL /* disable echo new line */
1082 | ICANON /* disable erase, kill, werase, and rprnt
1083 special characters */
1084 | ISIG /* disable interrupt, quit, and suspend special
1085 characters */
1086 | IEXTEN); /* disable non-POSIX special characters */
1087
1088 termios->c_cflag &=
1089 ~(CSIZE /* no size */
1090 | PARENB /* disable parity bit */
1091 | CBAUD /* clear current baud rate */
1092 | CBAUDEX); /* clear current buad rate */
1093
1094 termios->c_cflag |= CS8; /* character size 8 bits */
1095
1096 /* baud rate 115200 */
1097 tty_termios_encode_baud_rate(termios, 115200, 115200);
1098 }
1099
1100 static void _hso_serial_set_termios(struct tty_struct *tty,
1101 struct ktermios *old)
1102 {
1103 struct hso_serial *serial = get_serial_by_tty(tty);
1104 struct ktermios *termios;
1105
1106 if (!serial) {
1107 printk(KERN_ERR "%s: no tty structures", __func__);
1108 return;
1109 }
1110
1111 D4("port %d", serial->minor);
1112
1113 /*
1114 * Fix up unsupported bits
1115 */
1116 termios = tty->termios;
1117 termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1118
1119 termios->c_cflag &=
1120 ~(CSIZE /* no size */
1121 | PARENB /* disable parity bit */
1122 | CBAUD /* clear current baud rate */
1123 | CBAUDEX); /* clear current buad rate */
1124
1125 termios->c_cflag |= CS8; /* character size 8 bits */
1126
1127 /* baud rate 115200 */
1128 tty_encode_baud_rate(tty, 115200, 115200);
1129 }
1130
1131 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1132 {
1133 int result;
1134 #ifdef CONFIG_HSO_AUTOPM
1135 usb_mark_last_busy(urb->dev);
1136 #endif
1137 /* We are done with this URB, resubmit it. Prep the USB to wait for
1138 * another frame */
1139 usb_fill_bulk_urb(urb, serial->parent->usb,
1140 usb_rcvbulkpipe(serial->parent->usb,
1141 serial->in_endp->
1142 bEndpointAddress & 0x7F),
1143 urb->transfer_buffer, serial->rx_data_length,
1144 hso_std_serial_read_bulk_callback, serial);
1145 /* Give this to the USB subsystem so it can tell us when more data
1146 * arrives. */
1147 result = usb_submit_urb(urb, GFP_ATOMIC);
1148 if (result) {
1149 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1150 __func__, result);
1151 }
1152 }
1153
1154
1155
1156
1157 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1158 {
1159 int count;
1160 struct urb *curr_urb;
1161
1162 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1163 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1164 count = put_rxbuf_data(curr_urb, serial);
1165 if (count == -1)
1166 return;
1167 if (count == 0) {
1168 serial->curr_rx_urb_idx++;
1169 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1170 serial->curr_rx_urb_idx = 0;
1171 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1172 }
1173 }
1174 }
1175
1176 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1177 {
1178 int count = 0;
1179 struct urb *urb;
1180
1181 urb = serial->rx_urb[0];
1182 if (serial->open_count > 0) {
1183 count = put_rxbuf_data(urb, serial);
1184 if (count == -1)
1185 return;
1186 }
1187 /* Re issue a read as long as we receive data. */
1188
1189 if (count == 0 && ((urb->actual_length != 0) ||
1190 (serial->rx_state == RX_PENDING))) {
1191 serial->rx_state = RX_SENT;
1192 hso_mux_serial_read(serial);
1193 } else
1194 serial->rx_state = RX_IDLE;
1195 }
1196
1197
1198 /* read callback for Diag and CS port */
1199 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1200 {
1201 struct hso_serial *serial = urb->context;
1202 int status = urb->status;
1203
1204 /* sanity check */
1205 if (!serial) {
1206 D1("serial == NULL");
1207 return;
1208 } else if (status) {
1209 log_usb_status(status, __func__);
1210 return;
1211 }
1212
1213 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1214 D1("Actual length = %d\n", urb->actual_length);
1215 DUMP1(urb->transfer_buffer, urb->actual_length);
1216
1217 /* Anyone listening? */
1218 if (serial->open_count == 0)
1219 return;
1220
1221 if (status == 0) {
1222 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1223 u32 rest;
1224 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1225 rest =
1226 urb->actual_length %
1227 serial->in_endp->wMaxPacketSize;
1228 if (((rest == 5) || (rest == 6))
1229 && !memcmp(((u8 *) urb->transfer_buffer) +
1230 urb->actual_length - 4, crc_check, 4)) {
1231 urb->actual_length -= 4;
1232 }
1233 }
1234 /* Valid data, handle RX data */
1235 spin_lock(&serial->serial_lock);
1236 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1237 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1238 spin_unlock(&serial->serial_lock);
1239 } else if (status == -ENOENT || status == -ECONNRESET) {
1240 /* Unlinked - check for throttled port. */
1241 D2("Port %d, successfully unlinked urb", serial->minor);
1242 spin_lock(&serial->serial_lock);
1243 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1244 hso_resubmit_rx_bulk_urb(serial, urb);
1245 spin_unlock(&serial->serial_lock);
1246 } else {
1247 D2("Port %d, status = %d for read urb", serial->minor, status);
1248 return;
1249 }
1250 }
1251
1252 /*
1253 * This needs to be a tasklet otherwise we will
1254 * end up recursively calling this function.
1255 */
1256 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1257 {
1258 unsigned long flags;
1259
1260 spin_lock_irqsave(&serial->serial_lock, flags);
1261 if ((serial->parent->port_spec & HSO_INTF_MUX))
1262 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1263 else
1264 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1265 spin_unlock_irqrestore(&serial->serial_lock, flags);
1266 }
1267
1268 static void hso_unthrottle(struct tty_struct *tty)
1269 {
1270 struct hso_serial *serial = get_serial_by_tty(tty);
1271
1272 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1273 }
1274
1275 static void hso_unthrottle_workfunc(struct work_struct *work)
1276 {
1277 struct hso_serial *serial =
1278 container_of(work, struct hso_serial,
1279 retry_unthrottle_workqueue);
1280 hso_unthrottle_tasklet(serial);
1281 }
1282
1283 /* open the requested serial port */
1284 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1285 {
1286 struct hso_serial *serial = get_serial_by_index(tty->index);
1287 int result;
1288
1289 /* sanity check */
1290 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1291 WARN_ON(1);
1292 tty->driver_data = NULL;
1293 D1("Failed to open port");
1294 return -ENODEV;
1295 }
1296
1297 mutex_lock(&serial->parent->mutex);
1298 result = usb_autopm_get_interface(serial->parent->interface);
1299 if (result < 0)
1300 goto err_out;
1301
1302 D1("Opening %d", serial->minor);
1303 kref_get(&serial->parent->ref);
1304
1305 /* setup */
1306 spin_lock_irq(&serial->serial_lock);
1307 tty->driver_data = serial;
1308 tty_kref_put(serial->tty);
1309 serial->tty = tty_kref_get(tty);
1310 spin_unlock_irq(&serial->serial_lock);
1311
1312 /* check for port already opened, if not set the termios */
1313 serial->open_count++;
1314 if (serial->open_count == 1) {
1315 tty->low_latency = 1;
1316 serial->rx_state = RX_IDLE;
1317 /* Force default termio settings */
1318 _hso_serial_set_termios(tty, NULL);
1319 tasklet_init(&serial->unthrottle_tasklet,
1320 (void (*)(unsigned long))hso_unthrottle_tasklet,
1321 (unsigned long)serial);
1322 INIT_WORK(&serial->retry_unthrottle_workqueue,
1323 hso_unthrottle_workfunc);
1324 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1325 if (result) {
1326 hso_stop_serial_device(serial->parent);
1327 serial->open_count--;
1328 kref_put(&serial->parent->ref, hso_serial_ref_free);
1329 }
1330 } else {
1331 D1("Port was already open");
1332 }
1333
1334 usb_autopm_put_interface(serial->parent->interface);
1335
1336 /* done */
1337 if (result)
1338 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1339 err_out:
1340 mutex_unlock(&serial->parent->mutex);
1341 return result;
1342 }
1343
1344 /* close the requested serial port */
1345 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1346 {
1347 struct hso_serial *serial = tty->driver_data;
1348 u8 usb_gone;
1349
1350 D1("Closing serial port");
1351
1352 /* Open failed, no close cleanup required */
1353 if (serial == NULL)
1354 return;
1355
1356 mutex_lock(&serial->parent->mutex);
1357 usb_gone = serial->parent->usb_gone;
1358
1359 if (!usb_gone)
1360 usb_autopm_get_interface(serial->parent->interface);
1361
1362 /* reset the rts and dtr */
1363 /* do the actual close */
1364 serial->open_count--;
1365 kref_put(&serial->parent->ref, hso_serial_ref_free);
1366 if (serial->open_count <= 0) {
1367 serial->open_count = 0;
1368 spin_lock_irq(&serial->serial_lock);
1369 if (serial->tty == tty) {
1370 serial->tty->driver_data = NULL;
1371 serial->tty = NULL;
1372 tty_kref_put(tty);
1373 }
1374 spin_unlock_irq(&serial->serial_lock);
1375 if (!usb_gone)
1376 hso_stop_serial_device(serial->parent);
1377 tasklet_kill(&serial->unthrottle_tasklet);
1378 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1379 }
1380
1381 if (!usb_gone)
1382 usb_autopm_put_interface(serial->parent->interface);
1383
1384 mutex_unlock(&serial->parent->mutex);
1385 }
1386
1387 /* close the requested serial port */
1388 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1389 int count)
1390 {
1391 struct hso_serial *serial = get_serial_by_tty(tty);
1392 int space, tx_bytes;
1393 unsigned long flags;
1394
1395 /* sanity check */
1396 if (serial == NULL) {
1397 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1398 return -ENODEV;
1399 }
1400
1401 spin_lock_irqsave(&serial->serial_lock, flags);
1402
1403 space = serial->tx_data_length - serial->tx_buffer_count;
1404 tx_bytes = (count < space) ? count : space;
1405
1406 if (!tx_bytes)
1407 goto out;
1408
1409 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1410 serial->tx_buffer_count += tx_bytes;
1411
1412 out:
1413 spin_unlock_irqrestore(&serial->serial_lock, flags);
1414
1415 hso_kick_transmit(serial);
1416 /* done */
1417 return tx_bytes;
1418 }
1419
1420 /* how much room is there for writing */
1421 static int hso_serial_write_room(struct tty_struct *tty)
1422 {
1423 struct hso_serial *serial = get_serial_by_tty(tty);
1424 int room;
1425 unsigned long flags;
1426
1427 spin_lock_irqsave(&serial->serial_lock, flags);
1428 room = serial->tx_data_length - serial->tx_buffer_count;
1429 spin_unlock_irqrestore(&serial->serial_lock, flags);
1430
1431 /* return free room */
1432 return room;
1433 }
1434
1435 /* setup the term */
1436 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1437 {
1438 struct hso_serial *serial = get_serial_by_tty(tty);
1439 unsigned long flags;
1440
1441 if (old)
1442 D5("Termios called with: cflags new[%d] - old[%d]",
1443 tty->termios->c_cflag, old->c_cflag);
1444
1445 /* the actual setup */
1446 spin_lock_irqsave(&serial->serial_lock, flags);
1447 if (serial->open_count)
1448 _hso_serial_set_termios(tty, old);
1449 else
1450 tty->termios = old;
1451 spin_unlock_irqrestore(&serial->serial_lock, flags);
1452
1453 /* done */
1454 return;
1455 }
1456
1457 /* how many characters in the buffer */
1458 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1459 {
1460 struct hso_serial *serial = get_serial_by_tty(tty);
1461 int chars;
1462 unsigned long flags;
1463
1464 /* sanity check */
1465 if (serial == NULL)
1466 return 0;
1467
1468 spin_lock_irqsave(&serial->serial_lock, flags);
1469 chars = serial->tx_buffer_count;
1470 spin_unlock_irqrestore(&serial->serial_lock, flags);
1471
1472 return chars;
1473 }
1474 static int tiocmget_submit_urb(struct hso_serial *serial,
1475 struct hso_tiocmget *tiocmget,
1476 struct usb_device *usb)
1477 {
1478 int result;
1479
1480 if (serial->parent->usb_gone)
1481 return -ENODEV;
1482 usb_fill_int_urb(tiocmget->urb, usb,
1483 usb_rcvintpipe(usb,
1484 tiocmget->endp->
1485 bEndpointAddress & 0x7F),
1486 &tiocmget->serial_state_notification,
1487 sizeof(struct hso_serial_state_notification),
1488 tiocmget_intr_callback, serial,
1489 tiocmget->endp->bInterval);
1490 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1491 if (result) {
1492 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1493 result);
1494 }
1495 return result;
1496
1497 }
1498
1499 static void tiocmget_intr_callback(struct urb *urb)
1500 {
1501 struct hso_serial *serial = urb->context;
1502 struct hso_tiocmget *tiocmget;
1503 int status = urb->status;
1504 u16 UART_state_bitmap, prev_UART_state_bitmap;
1505 struct uart_icount *icount;
1506 struct hso_serial_state_notification *serial_state_notification;
1507 struct usb_device *usb;
1508
1509 /* Sanity checks */
1510 if (!serial)
1511 return;
1512 if (status) {
1513 log_usb_status(status, __func__);
1514 return;
1515 }
1516 tiocmget = serial->tiocmget;
1517 if (!tiocmget)
1518 return;
1519 usb = serial->parent->usb;
1520 serial_state_notification = &tiocmget->serial_state_notification;
1521 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1522 serial_state_notification->bNotification != B_NOTIFICATION ||
1523 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1524 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1525 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1526 dev_warn(&usb->dev,
1527 "hso received invalid serial state notification\n");
1528 DUMP(serial_state_notification,
1529 sizeof(hso_serial_state_notifation))
1530 } else {
1531
1532 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1533 UART_state_bitmap);
1534 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1535 icount = &tiocmget->icount;
1536 spin_lock(&serial->serial_lock);
1537 if ((UART_state_bitmap & B_OVERRUN) !=
1538 (prev_UART_state_bitmap & B_OVERRUN))
1539 icount->parity++;
1540 if ((UART_state_bitmap & B_PARITY) !=
1541 (prev_UART_state_bitmap & B_PARITY))
1542 icount->parity++;
1543 if ((UART_state_bitmap & B_FRAMING) !=
1544 (prev_UART_state_bitmap & B_FRAMING))
1545 icount->frame++;
1546 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1547 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1548 icount->rng++;
1549 if ((UART_state_bitmap & B_BREAK) !=
1550 (prev_UART_state_bitmap & B_BREAK))
1551 icount->brk++;
1552 if ((UART_state_bitmap & B_TX_CARRIER) !=
1553 (prev_UART_state_bitmap & B_TX_CARRIER))
1554 icount->dsr++;
1555 if ((UART_state_bitmap & B_RX_CARRIER) !=
1556 (prev_UART_state_bitmap & B_RX_CARRIER))
1557 icount->dcd++;
1558 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1559 spin_unlock(&serial->serial_lock);
1560 tiocmget->intr_completed = 1;
1561 wake_up_interruptible(&tiocmget->waitq);
1562 }
1563 memset(serial_state_notification, 0,
1564 sizeof(struct hso_serial_state_notification));
1565 tiocmget_submit_urb(serial,
1566 tiocmget,
1567 serial->parent->usb);
1568 }
1569
1570 /*
1571 * next few functions largely stolen from drivers/serial/serial_core.c
1572 */
1573 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1574 * - mask passed in arg for lines of interest
1575 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1576 * Caller should use TIOCGICOUNT to see which one it was
1577 */
1578 static int
1579 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1580 {
1581 DECLARE_WAITQUEUE(wait, current);
1582 struct uart_icount cprev, cnow;
1583 struct hso_tiocmget *tiocmget;
1584 int ret;
1585
1586 tiocmget = serial->tiocmget;
1587 if (!tiocmget)
1588 return -ENOENT;
1589 /*
1590 * note the counters on entry
1591 */
1592 spin_lock_irq(&serial->serial_lock);
1593 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1594 spin_unlock_irq(&serial->serial_lock);
1595 add_wait_queue(&tiocmget->waitq, &wait);
1596 for (;;) {
1597 spin_lock_irq(&serial->serial_lock);
1598 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1599 spin_unlock_irq(&serial->serial_lock);
1600 set_current_state(TASK_INTERRUPTIBLE);
1601 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1602 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1603 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1604 ret = 0;
1605 break;
1606 }
1607 schedule();
1608 /* see if a signal did it */
1609 if (signal_pending(current)) {
1610 ret = -ERESTARTSYS;
1611 break;
1612 }
1613 cprev = cnow;
1614 }
1615 current->state = TASK_RUNNING;
1616 remove_wait_queue(&tiocmget->waitq, &wait);
1617
1618 return ret;
1619 }
1620
1621 /*
1622 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1623 * Return: write counters to the user passed counter struct
1624 * NB: both 1->0 and 0->1 transitions are counted except for
1625 * RI where only 0->1 is counted.
1626 */
1627 static int hso_get_count(struct hso_serial *serial,
1628 struct serial_icounter_struct __user *icnt)
1629 {
1630 struct serial_icounter_struct icount;
1631 struct uart_icount cnow;
1632 struct hso_tiocmget *tiocmget = serial->tiocmget;
1633
1634 if (!tiocmget)
1635 return -ENOENT;
1636 spin_lock_irq(&serial->serial_lock);
1637 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1638 spin_unlock_irq(&serial->serial_lock);
1639
1640 icount.cts = cnow.cts;
1641 icount.dsr = cnow.dsr;
1642 icount.rng = cnow.rng;
1643 icount.dcd = cnow.dcd;
1644 icount.rx = cnow.rx;
1645 icount.tx = cnow.tx;
1646 icount.frame = cnow.frame;
1647 icount.overrun = cnow.overrun;
1648 icount.parity = cnow.parity;
1649 icount.brk = cnow.brk;
1650 icount.buf_overrun = cnow.buf_overrun;
1651
1652 return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
1653 }
1654
1655
1656 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1657 {
1658 int retval;
1659 struct hso_serial *serial = get_serial_by_tty(tty);
1660 struct hso_tiocmget *tiocmget;
1661 u16 UART_state_bitmap;
1662
1663 /* sanity check */
1664 if (!serial) {
1665 D1("no tty structures");
1666 return -EINVAL;
1667 }
1668 spin_lock_irq(&serial->serial_lock);
1669 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1670 ((serial->dtr_state) ? TIOCM_DTR : 0);
1671 tiocmget = serial->tiocmget;
1672 if (tiocmget) {
1673
1674 UART_state_bitmap = le16_to_cpu(
1675 tiocmget->prev_UART_state_bitmap);
1676 if (UART_state_bitmap & B_RING_SIGNAL)
1677 retval |= TIOCM_RNG;
1678 if (UART_state_bitmap & B_RX_CARRIER)
1679 retval |= TIOCM_CD;
1680 if (UART_state_bitmap & B_TX_CARRIER)
1681 retval |= TIOCM_DSR;
1682 }
1683 spin_unlock_irq(&serial->serial_lock);
1684 return retval;
1685 }
1686
1687 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1688 unsigned int set, unsigned int clear)
1689 {
1690 int val = 0;
1691 unsigned long flags;
1692 int if_num;
1693 struct hso_serial *serial = get_serial_by_tty(tty);
1694
1695 /* sanity check */
1696 if (!serial) {
1697 D1("no tty structures");
1698 return -EINVAL;
1699 }
1700 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1701
1702 spin_lock_irqsave(&serial->serial_lock, flags);
1703 if (set & TIOCM_RTS)
1704 serial->rts_state = 1;
1705 if (set & TIOCM_DTR)
1706 serial->dtr_state = 1;
1707
1708 if (clear & TIOCM_RTS)
1709 serial->rts_state = 0;
1710 if (clear & TIOCM_DTR)
1711 serial->dtr_state = 0;
1712
1713 if (serial->dtr_state)
1714 val |= 0x01;
1715 if (serial->rts_state)
1716 val |= 0x02;
1717
1718 spin_unlock_irqrestore(&serial->serial_lock, flags);
1719
1720 return usb_control_msg(serial->parent->usb,
1721 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1722 0x21, val, if_num, NULL, 0,
1723 USB_CTRL_SET_TIMEOUT);
1724 }
1725
1726 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1727 unsigned int cmd, unsigned long arg)
1728 {
1729 struct hso_serial *serial = get_serial_by_tty(tty);
1730 void __user *uarg = (void __user *)arg;
1731 int ret = 0;
1732 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1733
1734 if (!serial)
1735 return -ENODEV;
1736 switch (cmd) {
1737 case TIOCMIWAIT:
1738 ret = hso_wait_modem_status(serial, arg);
1739 break;
1740
1741 case TIOCGICOUNT:
1742 ret = hso_get_count(serial, uarg);
1743 break;
1744 default:
1745 ret = -ENOIOCTLCMD;
1746 break;
1747 }
1748 return ret;
1749 }
1750
1751
1752 /* starts a transmit */
1753 static void hso_kick_transmit(struct hso_serial *serial)
1754 {
1755 u8 *temp;
1756 unsigned long flags;
1757 int res;
1758
1759 spin_lock_irqsave(&serial->serial_lock, flags);
1760 if (!serial->tx_buffer_count)
1761 goto out;
1762
1763 if (serial->tx_urb_used)
1764 goto out;
1765
1766 /* Wakeup USB interface if necessary */
1767 if (hso_get_activity(serial->parent) == -EAGAIN)
1768 goto out;
1769
1770 /* Switch pointers around to avoid memcpy */
1771 temp = serial->tx_buffer;
1772 serial->tx_buffer = serial->tx_data;
1773 serial->tx_data = temp;
1774 serial->tx_data_count = serial->tx_buffer_count;
1775 serial->tx_buffer_count = 0;
1776
1777 /* If temp is set, it means we switched buffers */
1778 if (temp && serial->write_data) {
1779 res = serial->write_data(serial);
1780 if (res >= 0)
1781 serial->tx_urb_used = 1;
1782 }
1783 out:
1784 spin_unlock_irqrestore(&serial->serial_lock, flags);
1785 }
1786
1787 /* make a request (for reading and writing data to muxed serial port) */
1788 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1789 struct urb *ctrl_urb,
1790 struct usb_ctrlrequest *ctrl_req,
1791 u8 *ctrl_urb_data, u32 size)
1792 {
1793 int result;
1794 int pipe;
1795
1796 /* Sanity check */
1797 if (!serial || !ctrl_urb || !ctrl_req) {
1798 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1799 return -EINVAL;
1800 }
1801
1802 /* initialize */
1803 ctrl_req->wValue = 0;
1804 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1805 ctrl_req->wLength = cpu_to_le16(size);
1806
1807 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1808 /* Reading command */
1809 ctrl_req->bRequestType = USB_DIR_IN |
1810 USB_TYPE_OPTION_VENDOR |
1811 USB_RECIP_INTERFACE;
1812 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1813 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1814 } else {
1815 /* Writing command */
1816 ctrl_req->bRequestType = USB_DIR_OUT |
1817 USB_TYPE_OPTION_VENDOR |
1818 USB_RECIP_INTERFACE;
1819 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1820 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1821 }
1822 /* syslog */
1823 D2("%s command (%02x) len: %d, port: %d",
1824 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1825 ctrl_req->bRequestType, ctrl_req->wLength, port);
1826
1827 /* Load ctrl urb */
1828 ctrl_urb->transfer_flags = 0;
1829 usb_fill_control_urb(ctrl_urb,
1830 serial->parent->usb,
1831 pipe,
1832 (u8 *) ctrl_req,
1833 ctrl_urb_data, size, ctrl_callback, serial);
1834 /* Send it on merry way */
1835 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1836 if (result) {
1837 dev_err(&ctrl_urb->dev->dev,
1838 "%s failed submit ctrl_urb %d type %d", __func__,
1839 result, type);
1840 return result;
1841 }
1842
1843 /* done */
1844 return size;
1845 }
1846
1847 /* called by intr_callback when read occurs */
1848 static int hso_mux_serial_read(struct hso_serial *serial)
1849 {
1850 if (!serial)
1851 return -EINVAL;
1852
1853 /* clean data */
1854 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1855 /* make the request */
1856
1857 if (serial->num_rx_urbs != 1) {
1858 dev_err(&serial->parent->interface->dev,
1859 "ERROR: mux'd reads with multiple buffers "
1860 "not possible\n");
1861 return 0;
1862 }
1863 return mux_device_request(serial,
1864 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1865 serial->parent->port_spec & HSO_PORT_MASK,
1866 serial->rx_urb[0],
1867 &serial->ctrl_req_rx,
1868 serial->rx_data[0], serial->rx_data_length);
1869 }
1870
1871 /* used for muxed serial port callback (muxed serial read) */
1872 static void intr_callback(struct urb *urb)
1873 {
1874 struct hso_shared_int *shared_int = urb->context;
1875 struct hso_serial *serial;
1876 unsigned char *port_req;
1877 int status = urb->status;
1878 int i;
1879
1880 usb_mark_last_busy(urb->dev);
1881
1882 /* sanity check */
1883 if (!shared_int)
1884 return;
1885
1886 /* status check */
1887 if (status) {
1888 log_usb_status(status, __func__);
1889 return;
1890 }
1891 D4("\n--- Got intr callback 0x%02X ---", status);
1892
1893 /* what request? */
1894 port_req = urb->transfer_buffer;
1895 D4(" port_req = 0x%.2X\n", *port_req);
1896 /* loop over all muxed ports to find the one sending this */
1897 for (i = 0; i < 8; i++) {
1898 /* max 8 channels on MUX */
1899 if (*port_req & (1 << i)) {
1900 serial = get_serial_by_shared_int_and_type(shared_int,
1901 (1 << i));
1902 if (serial != NULL) {
1903 D1("Pending read interrupt on port %d\n", i);
1904 spin_lock(&serial->serial_lock);
1905 if (serial->rx_state == RX_IDLE) {
1906 /* Setup and send a ctrl req read on
1907 * port i */
1908 if (!serial->rx_urb_filled[0]) {
1909 serial->rx_state = RX_SENT;
1910 hso_mux_serial_read(serial);
1911 } else
1912 serial->rx_state = RX_PENDING;
1913
1914 } else {
1915 D1("Already pending a read on "
1916 "port %d\n", i);
1917 }
1918 spin_unlock(&serial->serial_lock);
1919 }
1920 }
1921 }
1922 /* Resubmit interrupt urb */
1923 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1924 }
1925
1926 /* called for writing to muxed serial port */
1927 static int hso_mux_serial_write_data(struct hso_serial *serial)
1928 {
1929 if (NULL == serial)
1930 return -EINVAL;
1931
1932 return mux_device_request(serial,
1933 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1934 serial->parent->port_spec & HSO_PORT_MASK,
1935 serial->tx_urb,
1936 &serial->ctrl_req_tx,
1937 serial->tx_data, serial->tx_data_count);
1938 }
1939
1940 /* write callback for Diag and CS port */
1941 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1942 {
1943 struct hso_serial *serial = urb->context;
1944 int status = urb->status;
1945 struct tty_struct *tty;
1946
1947 /* sanity check */
1948 if (!serial) {
1949 D1("serial == NULL");
1950 return;
1951 }
1952
1953 spin_lock(&serial->serial_lock);
1954 serial->tx_urb_used = 0;
1955 tty = tty_kref_get(serial->tty);
1956 spin_unlock(&serial->serial_lock);
1957 if (status) {
1958 log_usb_status(status, __func__);
1959 tty_kref_put(tty);
1960 return;
1961 }
1962 hso_put_activity(serial->parent);
1963 if (tty) {
1964 tty_wakeup(tty);
1965 tty_kref_put(tty);
1966 }
1967 hso_kick_transmit(serial);
1968
1969 D1(" ");
1970 return;
1971 }
1972
1973 /* called for writing diag or CS serial port */
1974 static int hso_std_serial_write_data(struct hso_serial *serial)
1975 {
1976 int count = serial->tx_data_count;
1977 int result;
1978
1979 usb_fill_bulk_urb(serial->tx_urb,
1980 serial->parent->usb,
1981 usb_sndbulkpipe(serial->parent->usb,
1982 serial->out_endp->
1983 bEndpointAddress & 0x7F),
1984 serial->tx_data, serial->tx_data_count,
1985 hso_std_serial_write_bulk_callback, serial);
1986
1987 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1988 if (result) {
1989 dev_warn(&serial->parent->usb->dev,
1990 "Failed to submit urb - res %d\n", result);
1991 return result;
1992 }
1993
1994 return count;
1995 }
1996
1997 /* callback after read or write on muxed serial port */
1998 static void ctrl_callback(struct urb *urb)
1999 {
2000 struct hso_serial *serial = urb->context;
2001 struct usb_ctrlrequest *req;
2002 int status = urb->status;
2003 struct tty_struct *tty;
2004
2005 /* sanity check */
2006 if (!serial)
2007 return;
2008
2009 spin_lock(&serial->serial_lock);
2010 serial->tx_urb_used = 0;
2011 tty = tty_kref_get(serial->tty);
2012 spin_unlock(&serial->serial_lock);
2013 if (status) {
2014 log_usb_status(status, __func__);
2015 tty_kref_put(tty);
2016 return;
2017 }
2018
2019 /* what request? */
2020 req = (struct usb_ctrlrequest *)(urb->setup_packet);
2021 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2022 D4("Actual length of urb = %d\n", urb->actual_length);
2023 DUMP1(urb->transfer_buffer, urb->actual_length);
2024
2025 if (req->bRequestType ==
2026 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2027 /* response to a read command */
2028 serial->rx_urb_filled[0] = 1;
2029 spin_lock(&serial->serial_lock);
2030 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2031 spin_unlock(&serial->serial_lock);
2032 } else {
2033 hso_put_activity(serial->parent);
2034 if (tty)
2035 tty_wakeup(tty);
2036 /* response to a write command */
2037 hso_kick_transmit(serial);
2038 }
2039 tty_kref_put(tty);
2040 }
2041
2042 /* handle RX data for serial port */
2043 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2044 {
2045 struct tty_struct *tty;
2046 int write_length_remaining = 0;
2047 int curr_write_len;
2048
2049 /* Sanity check */
2050 if (urb == NULL || serial == NULL) {
2051 D1("serial = NULL");
2052 return -2;
2053 }
2054
2055 /* All callers to put_rxbuf_data hold serial_lock */
2056 tty = tty_kref_get(serial->tty);
2057
2058 /* Push data to tty */
2059 if (tty) {
2060 write_length_remaining = urb->actual_length -
2061 serial->curr_rx_urb_offset;
2062 D1("data to push to tty");
2063 while (write_length_remaining) {
2064 if (test_bit(TTY_THROTTLED, &tty->flags)) {
2065 tty_kref_put(tty);
2066 return -1;
2067 }
2068 curr_write_len = tty_insert_flip_string
2069 (tty, urb->transfer_buffer +
2070 serial->curr_rx_urb_offset,
2071 write_length_remaining);
2072 serial->curr_rx_urb_offset += curr_write_len;
2073 write_length_remaining -= curr_write_len;
2074 tty_flip_buffer_push(tty);
2075 }
2076 }
2077 if (write_length_remaining == 0) {
2078 serial->curr_rx_urb_offset = 0;
2079 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2080 }
2081 tty_kref_put(tty);
2082 return write_length_remaining;
2083 }
2084
2085
2086 /* Base driver functions */
2087
2088 static void hso_log_port(struct hso_device *hso_dev)
2089 {
2090 char *port_type;
2091 char port_dev[20];
2092
2093 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2094 case HSO_PORT_CONTROL:
2095 port_type = "Control";
2096 break;
2097 case HSO_PORT_APP:
2098 port_type = "Application";
2099 break;
2100 case HSO_PORT_GPS:
2101 port_type = "GPS";
2102 break;
2103 case HSO_PORT_GPS_CONTROL:
2104 port_type = "GPS control";
2105 break;
2106 case HSO_PORT_APP2:
2107 port_type = "Application2";
2108 break;
2109 case HSO_PORT_PCSC:
2110 port_type = "PCSC";
2111 break;
2112 case HSO_PORT_DIAG:
2113 port_type = "Diagnostic";
2114 break;
2115 case HSO_PORT_DIAG2:
2116 port_type = "Diagnostic2";
2117 break;
2118 case HSO_PORT_MODEM:
2119 port_type = "Modem";
2120 break;
2121 case HSO_PORT_NETWORK:
2122 port_type = "Network";
2123 break;
2124 default:
2125 port_type = "Unknown";
2126 break;
2127 }
2128 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2129 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2130 } else
2131 sprintf(port_dev, "/dev/%s%d", tty_filename,
2132 dev2ser(hso_dev)->minor);
2133
2134 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2135 port_type, port_dev);
2136 }
2137
2138 static int hso_start_net_device(struct hso_device *hso_dev)
2139 {
2140 int i, result = 0;
2141 struct hso_net *hso_net = dev2net(hso_dev);
2142
2143 if (!hso_net)
2144 return -ENODEV;
2145
2146 /* send URBs for all read buffers */
2147 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2148
2149 /* Prep a receive URB */
2150 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2151 hso_dev->usb,
2152 usb_rcvbulkpipe(hso_dev->usb,
2153 hso_net->in_endp->
2154 bEndpointAddress & 0x7F),
2155 hso_net->mux_bulk_rx_buf_pool[i],
2156 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2157 hso_net);
2158
2159 /* Put it out there so the device can send us stuff */
2160 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2161 GFP_NOIO);
2162 if (result)
2163 dev_warn(&hso_dev->usb->dev,
2164 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2165 i, result);
2166 }
2167
2168 return result;
2169 }
2170
2171 static int hso_stop_net_device(struct hso_device *hso_dev)
2172 {
2173 int i;
2174 struct hso_net *hso_net = dev2net(hso_dev);
2175
2176 if (!hso_net)
2177 return -ENODEV;
2178
2179 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2180 if (hso_net->mux_bulk_rx_urb_pool[i])
2181 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2182
2183 }
2184 if (hso_net->mux_bulk_tx_urb)
2185 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2186
2187 return 0;
2188 }
2189
2190 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2191 {
2192 int i, result = 0;
2193 struct hso_serial *serial = dev2ser(hso_dev);
2194
2195 if (!serial)
2196 return -ENODEV;
2197
2198 /* If it is not the MUX port fill in and submit a bulk urb (already
2199 * allocated in hso_serial_start) */
2200 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2201 for (i = 0; i < serial->num_rx_urbs; i++) {
2202 usb_fill_bulk_urb(serial->rx_urb[i],
2203 serial->parent->usb,
2204 usb_rcvbulkpipe(serial->parent->usb,
2205 serial->in_endp->
2206 bEndpointAddress &
2207 0x7F),
2208 serial->rx_data[i],
2209 serial->rx_data_length,
2210 hso_std_serial_read_bulk_callback,
2211 serial);
2212 result = usb_submit_urb(serial->rx_urb[i], flags);
2213 if (result) {
2214 dev_warn(&serial->parent->usb->dev,
2215 "Failed to submit urb - res %d\n",
2216 result);
2217 break;
2218 }
2219 }
2220 } else {
2221 mutex_lock(&serial->shared_int->shared_int_lock);
2222 if (!serial->shared_int->use_count) {
2223 result =
2224 hso_mux_submit_intr_urb(serial->shared_int,
2225 hso_dev->usb, flags);
2226 }
2227 serial->shared_int->use_count++;
2228 mutex_unlock(&serial->shared_int->shared_int_lock);
2229 }
2230 if (serial->tiocmget)
2231 tiocmget_submit_urb(serial,
2232 serial->tiocmget,
2233 serial->parent->usb);
2234 return result;
2235 }
2236
2237 static int hso_stop_serial_device(struct hso_device *hso_dev)
2238 {
2239 int i;
2240 struct hso_serial *serial = dev2ser(hso_dev);
2241 struct hso_tiocmget *tiocmget;
2242
2243 if (!serial)
2244 return -ENODEV;
2245
2246 for (i = 0; i < serial->num_rx_urbs; i++) {
2247 if (serial->rx_urb[i]) {
2248 usb_kill_urb(serial->rx_urb[i]);
2249 serial->rx_urb_filled[i] = 0;
2250 }
2251 }
2252 serial->curr_rx_urb_idx = 0;
2253 serial->curr_rx_urb_offset = 0;
2254
2255 if (serial->tx_urb)
2256 usb_kill_urb(serial->tx_urb);
2257
2258 if (serial->shared_int) {
2259 mutex_lock(&serial->shared_int->shared_int_lock);
2260 if (serial->shared_int->use_count &&
2261 (--serial->shared_int->use_count == 0)) {
2262 struct urb *urb;
2263
2264 urb = serial->shared_int->shared_intr_urb;
2265 if (urb)
2266 usb_kill_urb(urb);
2267 }
2268 mutex_unlock(&serial->shared_int->shared_int_lock);
2269 }
2270 tiocmget = serial->tiocmget;
2271 if (tiocmget) {
2272 wake_up_interruptible(&tiocmget->waitq);
2273 usb_kill_urb(tiocmget->urb);
2274 }
2275
2276 return 0;
2277 }
2278
2279 static void hso_serial_common_free(struct hso_serial *serial)
2280 {
2281 int i;
2282
2283 if (serial->parent->dev)
2284 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2285
2286 tty_unregister_device(tty_drv, serial->minor);
2287
2288 for (i = 0; i < serial->num_rx_urbs; i++) {
2289 /* unlink and free RX URB */
2290 usb_free_urb(serial->rx_urb[i]);
2291 /* free the RX buffer */
2292 kfree(serial->rx_data[i]);
2293 }
2294
2295 /* unlink and free TX URB */
2296 usb_free_urb(serial->tx_urb);
2297 kfree(serial->tx_data);
2298 }
2299
2300 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2301 int rx_size, int tx_size)
2302 {
2303 struct device *dev;
2304 int minor;
2305 int i;
2306
2307 minor = get_free_serial_index();
2308 if (minor < 0)
2309 goto exit;
2310
2311 /* register our minor number */
2312 serial->parent->dev = tty_register_device(tty_drv, minor,
2313 &serial->parent->interface->dev);
2314 dev = serial->parent->dev;
2315 dev_set_drvdata(dev, serial->parent);
2316 i = device_create_file(dev, &dev_attr_hsotype);
2317
2318 /* fill in specific data for later use */
2319 serial->minor = minor;
2320 serial->magic = HSO_SERIAL_MAGIC;
2321 spin_lock_init(&serial->serial_lock);
2322 serial->num_rx_urbs = num_urbs;
2323
2324 /* RX, allocate urb and initialize */
2325
2326 /* prepare our RX buffer */
2327 serial->rx_data_length = rx_size;
2328 for (i = 0; i < serial->num_rx_urbs; i++) {
2329 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2330 if (!serial->rx_urb[i]) {
2331 dev_err(dev, "Could not allocate urb?\n");
2332 goto exit;
2333 }
2334 serial->rx_urb[i]->transfer_buffer = NULL;
2335 serial->rx_urb[i]->transfer_buffer_length = 0;
2336 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2337 GFP_KERNEL);
2338 if (!serial->rx_data[i]) {
2339 dev_err(dev, "%s - Out of memory\n", __func__);
2340 goto exit;
2341 }
2342 }
2343
2344 /* TX, allocate urb and initialize */
2345 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2346 if (!serial->tx_urb) {
2347 dev_err(dev, "Could not allocate urb?\n");
2348 goto exit;
2349 }
2350 serial->tx_urb->transfer_buffer = NULL;
2351 serial->tx_urb->transfer_buffer_length = 0;
2352 /* prepare our TX buffer */
2353 serial->tx_data_count = 0;
2354 serial->tx_buffer_count = 0;
2355 serial->tx_data_length = tx_size;
2356 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2357 if (!serial->tx_data) {
2358 dev_err(dev, "%s - Out of memory", __func__);
2359 goto exit;
2360 }
2361 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2362 if (!serial->tx_buffer) {
2363 dev_err(dev, "%s - Out of memory", __func__);
2364 goto exit;
2365 }
2366
2367 return 0;
2368 exit:
2369 hso_serial_common_free(serial);
2370 return -1;
2371 }
2372
2373 /* Creates a general hso device */
2374 static struct hso_device *hso_create_device(struct usb_interface *intf,
2375 int port_spec)
2376 {
2377 struct hso_device *hso_dev;
2378
2379 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2380 if (!hso_dev)
2381 return NULL;
2382
2383 hso_dev->port_spec = port_spec;
2384 hso_dev->usb = interface_to_usbdev(intf);
2385 hso_dev->interface = intf;
2386 kref_init(&hso_dev->ref);
2387 mutex_init(&hso_dev->mutex);
2388
2389 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2390 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2391
2392 return hso_dev;
2393 }
2394
2395 /* Removes a network device in the network device table */
2396 static int remove_net_device(struct hso_device *hso_dev)
2397 {
2398 int i;
2399
2400 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2401 if (network_table[i] == hso_dev) {
2402 network_table[i] = NULL;
2403 break;
2404 }
2405 }
2406 if (i == HSO_MAX_NET_DEVICES)
2407 return -1;
2408 return 0;
2409 }
2410
2411 /* Frees our network device */
2412 static void hso_free_net_device(struct hso_device *hso_dev)
2413 {
2414 int i;
2415 struct hso_net *hso_net = dev2net(hso_dev);
2416
2417 if (!hso_net)
2418 return;
2419
2420 remove_net_device(hso_net->parent);
2421
2422 if (hso_net->net) {
2423 unregister_netdev(hso_net->net);
2424 free_netdev(hso_net->net);
2425 }
2426
2427 /* start freeing */
2428 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2429 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2430 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2431 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2432 }
2433 usb_free_urb(hso_net->mux_bulk_tx_urb);
2434 kfree(hso_net->mux_bulk_tx_buf);
2435 hso_net->mux_bulk_tx_buf = NULL;
2436
2437 kfree(hso_dev);
2438 }
2439
2440 static const struct net_device_ops hso_netdev_ops = {
2441 .ndo_open = hso_net_open,
2442 .ndo_stop = hso_net_close,
2443 .ndo_start_xmit = hso_net_start_xmit,
2444 .ndo_tx_timeout = hso_net_tx_timeout,
2445 };
2446
2447 /* initialize the network interface */
2448 static void hso_net_init(struct net_device *net)
2449 {
2450 struct hso_net *hso_net = netdev_priv(net);
2451
2452 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2453
2454 /* fill in the other fields */
2455 net->netdev_ops = &hso_netdev_ops;
2456 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2457 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2458 net->type = ARPHRD_NONE;
2459 net->mtu = DEFAULT_MTU - 14;
2460 net->tx_queue_len = 10;
2461 SET_ETHTOOL_OPS(net, &ops);
2462
2463 /* and initialize the semaphore */
2464 spin_lock_init(&hso_net->net_lock);
2465 }
2466
2467 /* Adds a network device in the network device table */
2468 static int add_net_device(struct hso_device *hso_dev)
2469 {
2470 int i;
2471
2472 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2473 if (network_table[i] == NULL) {
2474 network_table[i] = hso_dev;
2475 break;
2476 }
2477 }
2478 if (i == HSO_MAX_NET_DEVICES)
2479 return -1;
2480 return 0;
2481 }
2482
2483 static int hso_rfkill_set_block(void *data, bool blocked)
2484 {
2485 struct hso_device *hso_dev = data;
2486 int enabled = !blocked;
2487 int rv;
2488
2489 mutex_lock(&hso_dev->mutex);
2490 if (hso_dev->usb_gone)
2491 rv = 0;
2492 else
2493 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2494 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2495 USB_CTRL_SET_TIMEOUT);
2496 mutex_unlock(&hso_dev->mutex);
2497 return rv;
2498 }
2499
2500 static const struct rfkill_ops hso_rfkill_ops = {
2501 .set_block = hso_rfkill_set_block,
2502 };
2503
2504 /* Creates and sets up everything for rfkill */
2505 static void hso_create_rfkill(struct hso_device *hso_dev,
2506 struct usb_interface *interface)
2507 {
2508 struct hso_net *hso_net = dev2net(hso_dev);
2509 struct device *dev = &hso_net->net->dev;
2510 char *rfkn;
2511
2512 rfkn = kzalloc(20, GFP_KERNEL);
2513 if (!rfkn)
2514 dev_err(dev, "%s - Out of memory\n", __func__);
2515
2516 snprintf(rfkn, 20, "hso-%d",
2517 interface->altsetting->desc.bInterfaceNumber);
2518
2519 hso_net->rfkill = rfkill_alloc(rfkn,
2520 &interface_to_usbdev(interface)->dev,
2521 RFKILL_TYPE_WWAN,
2522 &hso_rfkill_ops, hso_dev);
2523 if (!hso_net->rfkill) {
2524 dev_err(dev, "%s - Out of memory\n", __func__);
2525 kfree(rfkn);
2526 return;
2527 }
2528 if (rfkill_register(hso_net->rfkill) < 0) {
2529 rfkill_destroy(hso_net->rfkill);
2530 kfree(rfkn);
2531 hso_net->rfkill = NULL;
2532 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2533 return;
2534 }
2535 }
2536
2537 /* Creates our network device */
2538 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2539 int port_spec)
2540 {
2541 int result, i;
2542 struct net_device *net;
2543 struct hso_net *hso_net;
2544 struct hso_device *hso_dev;
2545
2546 hso_dev = hso_create_device(interface, port_spec);
2547 if (!hso_dev)
2548 return NULL;
2549
2550 /* allocate our network device, then we can put in our private data */
2551 /* call hso_net_init to do the basic initialization */
2552 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2553 if (!net) {
2554 dev_err(&interface->dev, "Unable to create ethernet device\n");
2555 goto exit;
2556 }
2557
2558 hso_net = netdev_priv(net);
2559
2560 hso_dev->port_data.dev_net = hso_net;
2561 hso_net->net = net;
2562 hso_net->parent = hso_dev;
2563
2564 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2565 USB_DIR_IN);
2566 if (!hso_net->in_endp) {
2567 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2568 goto exit;
2569 }
2570 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2571 USB_DIR_OUT);
2572 if (!hso_net->out_endp) {
2573 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2574 goto exit;
2575 }
2576 SET_NETDEV_DEV(net, &interface->dev);
2577
2578 /* registering our net device */
2579 result = register_netdev(net);
2580 if (result) {
2581 dev_err(&interface->dev, "Failed to register device\n");
2582 goto exit;
2583 }
2584
2585 /* start allocating */
2586 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2587 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2588 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2589 dev_err(&interface->dev, "Could not allocate rx urb\n");
2590 goto exit;
2591 }
2592 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2593 GFP_KERNEL);
2594 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2595 dev_err(&interface->dev, "Could not allocate rx buf\n");
2596 goto exit;
2597 }
2598 }
2599 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2600 if (!hso_net->mux_bulk_tx_urb) {
2601 dev_err(&interface->dev, "Could not allocate tx urb\n");
2602 goto exit;
2603 }
2604 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2605 if (!hso_net->mux_bulk_tx_buf) {
2606 dev_err(&interface->dev, "Could not allocate tx buf\n");
2607 goto exit;
2608 }
2609
2610 add_net_device(hso_dev);
2611
2612 hso_log_port(hso_dev);
2613
2614 hso_create_rfkill(hso_dev, interface);
2615
2616 return hso_dev;
2617 exit:
2618 hso_free_net_device(hso_dev);
2619 return NULL;
2620 }
2621
2622 static void hso_free_tiomget(struct hso_serial *serial)
2623 {
2624 struct hso_tiocmget *tiocmget = serial->tiocmget;
2625 if (tiocmget) {
2626 if (tiocmget->urb) {
2627 usb_free_urb(tiocmget->urb);
2628 tiocmget->urb = NULL;
2629 }
2630 serial->tiocmget = NULL;
2631 kfree(tiocmget);
2632
2633 }
2634 }
2635
2636 /* Frees an AT channel ( goes for both mux and non-mux ) */
2637 static void hso_free_serial_device(struct hso_device *hso_dev)
2638 {
2639 struct hso_serial *serial = dev2ser(hso_dev);
2640
2641 if (!serial)
2642 return;
2643 set_serial_by_index(serial->minor, NULL);
2644
2645 hso_serial_common_free(serial);
2646
2647 if (serial->shared_int) {
2648 mutex_lock(&serial->shared_int->shared_int_lock);
2649 if (--serial->shared_int->ref_count == 0)
2650 hso_free_shared_int(serial->shared_int);
2651 else
2652 mutex_unlock(&serial->shared_int->shared_int_lock);
2653 }
2654 hso_free_tiomget(serial);
2655 kfree(serial);
2656 kfree(hso_dev);
2657 }
2658
2659 /* Creates a bulk AT channel */
2660 static struct hso_device *hso_create_bulk_serial_device(
2661 struct usb_interface *interface, int port)
2662 {
2663 struct hso_device *hso_dev;
2664 struct hso_serial *serial;
2665 int num_urbs;
2666 struct hso_tiocmget *tiocmget;
2667
2668 hso_dev = hso_create_device(interface, port);
2669 if (!hso_dev)
2670 return NULL;
2671
2672 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2673 if (!serial)
2674 goto exit;
2675
2676 serial->parent = hso_dev;
2677 hso_dev->port_data.dev_serial = serial;
2678
2679 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2680 num_urbs = 2;
2681 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2682 GFP_KERNEL);
2683 /* it isn't going to break our heart if serial->tiocmget
2684 * allocation fails don't bother checking this.
2685 */
2686 if (serial->tiocmget) {
2687 tiocmget = serial->tiocmget;
2688 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2689 if (tiocmget->urb) {
2690 mutex_init(&tiocmget->mutex);
2691 init_waitqueue_head(&tiocmget->waitq);
2692 tiocmget->endp = hso_get_ep(
2693 interface,
2694 USB_ENDPOINT_XFER_INT,
2695 USB_DIR_IN);
2696 } else
2697 hso_free_tiomget(serial);
2698 }
2699 }
2700 else
2701 num_urbs = 1;
2702
2703 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2704 BULK_URB_TX_SIZE))
2705 goto exit;
2706
2707 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2708 USB_DIR_IN);
2709 if (!serial->in_endp) {
2710 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2711 goto exit2;
2712 }
2713
2714 if (!
2715 (serial->out_endp =
2716 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2717 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2718 goto exit2;
2719 }
2720
2721 serial->write_data = hso_std_serial_write_data;
2722
2723 /* and record this serial */
2724 set_serial_by_index(serial->minor, serial);
2725
2726 /* setup the proc dirs and files if needed */
2727 hso_log_port(hso_dev);
2728
2729 /* done, return it */
2730 return hso_dev;
2731
2732 exit2:
2733 hso_serial_common_free(serial);
2734 exit:
2735 hso_free_tiomget(serial);
2736 kfree(serial);
2737 kfree(hso_dev);
2738 return NULL;
2739 }
2740
2741 /* Creates a multiplexed AT channel */
2742 static
2743 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2744 int port,
2745 struct hso_shared_int *mux)
2746 {
2747 struct hso_device *hso_dev;
2748 struct hso_serial *serial;
2749 int port_spec;
2750
2751 port_spec = HSO_INTF_MUX;
2752 port_spec &= ~HSO_PORT_MASK;
2753
2754 port_spec |= hso_mux_to_port(port);
2755 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2756 return NULL;
2757
2758 hso_dev = hso_create_device(interface, port_spec);
2759 if (!hso_dev)
2760 return NULL;
2761
2762 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2763 if (!serial)
2764 goto exit;
2765
2766 hso_dev->port_data.dev_serial = serial;
2767 serial->parent = hso_dev;
2768
2769 if (hso_serial_common_create
2770 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2771 goto exit;
2772
2773 serial->tx_data_length--;
2774 serial->write_data = hso_mux_serial_write_data;
2775
2776 serial->shared_int = mux;
2777 mutex_lock(&serial->shared_int->shared_int_lock);
2778 serial->shared_int->ref_count++;
2779 mutex_unlock(&serial->shared_int->shared_int_lock);
2780
2781 /* and record this serial */
2782 set_serial_by_index(serial->minor, serial);
2783
2784 /* setup the proc dirs and files if needed */
2785 hso_log_port(hso_dev);
2786
2787 /* done, return it */
2788 return hso_dev;
2789
2790 exit:
2791 if (serial) {
2792 tty_unregister_device(tty_drv, serial->minor);
2793 kfree(serial);
2794 }
2795 if (hso_dev)
2796 kfree(hso_dev);
2797 return NULL;
2798
2799 }
2800
2801 static void hso_free_shared_int(struct hso_shared_int *mux)
2802 {
2803 usb_free_urb(mux->shared_intr_urb);
2804 kfree(mux->shared_intr_buf);
2805 mutex_unlock(&mux->shared_int_lock);
2806 kfree(mux);
2807 }
2808
2809 static
2810 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2811 {
2812 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2813
2814 if (!mux)
2815 return NULL;
2816
2817 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2818 USB_DIR_IN);
2819 if (!mux->intr_endp) {
2820 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2821 goto exit;
2822 }
2823
2824 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2825 if (!mux->shared_intr_urb) {
2826 dev_err(&interface->dev, "Could not allocate intr urb?");
2827 goto exit;
2828 }
2829 mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize,
2830 GFP_KERNEL);
2831 if (!mux->shared_intr_buf) {
2832 dev_err(&interface->dev, "Could not allocate intr buf?");
2833 goto exit;
2834 }
2835
2836 mutex_init(&mux->shared_int_lock);
2837
2838 return mux;
2839
2840 exit:
2841 kfree(mux->shared_intr_buf);
2842 usb_free_urb(mux->shared_intr_urb);
2843 kfree(mux);
2844 return NULL;
2845 }
2846
2847 /* Gets the port spec for a certain interface */
2848 static int hso_get_config_data(struct usb_interface *interface)
2849 {
2850 struct usb_device *usbdev = interface_to_usbdev(interface);
2851 u8 config_data[17];
2852 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2853 s32 result;
2854
2855 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2856 0x86, 0xC0, 0, 0, config_data, 17,
2857 USB_CTRL_SET_TIMEOUT) != 0x11) {
2858 return -EIO;
2859 }
2860
2861 switch (config_data[if_num]) {
2862 case 0x0:
2863 result = 0;
2864 break;
2865 case 0x1:
2866 result = HSO_PORT_DIAG;
2867 break;
2868 case 0x2:
2869 result = HSO_PORT_GPS;
2870 break;
2871 case 0x3:
2872 result = HSO_PORT_GPS_CONTROL;
2873 break;
2874 case 0x4:
2875 result = HSO_PORT_APP;
2876 break;
2877 case 0x5:
2878 result = HSO_PORT_APP2;
2879 break;
2880 case 0x6:
2881 result = HSO_PORT_CONTROL;
2882 break;
2883 case 0x7:
2884 result = HSO_PORT_NETWORK;
2885 break;
2886 case 0x8:
2887 result = HSO_PORT_MODEM;
2888 break;
2889 case 0x9:
2890 result = HSO_PORT_MSD;
2891 break;
2892 case 0xa:
2893 result = HSO_PORT_PCSC;
2894 break;
2895 case 0xb:
2896 result = HSO_PORT_VOICE;
2897 break;
2898 default:
2899 result = 0;
2900 }
2901
2902 if (result)
2903 result |= HSO_INTF_BULK;
2904
2905 if (config_data[16] & 0x1)
2906 result |= HSO_INFO_CRC_BUG;
2907
2908 return result;
2909 }
2910
2911 /* called once for each interface upon device insertion */
2912 static int hso_probe(struct usb_interface *interface,
2913 const struct usb_device_id *id)
2914 {
2915 int mux, i, if_num, port_spec;
2916 unsigned char port_mask;
2917 struct hso_device *hso_dev = NULL;
2918 struct hso_shared_int *shared_int;
2919 struct hso_device *tmp_dev = NULL;
2920
2921 if_num = interface->altsetting->desc.bInterfaceNumber;
2922
2923 /* Get the interface/port specification from either driver_info or from
2924 * the device itself */
2925 if (id->driver_info)
2926 port_spec = ((u32 *)(id->driver_info))[if_num];
2927 else
2928 port_spec = hso_get_config_data(interface);
2929
2930 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2931 dev_err(&interface->dev, "Not our interface\n");
2932 return -ENODEV;
2933 }
2934 /* Check if we need to switch to alt interfaces prior to port
2935 * configuration */
2936 if (interface->num_altsetting > 1)
2937 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2938 interface->needs_remote_wakeup = 1;
2939
2940 /* Allocate new hso device(s) */
2941 switch (port_spec & HSO_INTF_MASK) {
2942 case HSO_INTF_MUX:
2943 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2944 /* Create the network device */
2945 if (!disable_net) {
2946 hso_dev = hso_create_net_device(interface,
2947 port_spec);
2948 if (!hso_dev)
2949 goto exit;
2950 tmp_dev = hso_dev;
2951 }
2952 }
2953
2954 if (hso_get_mux_ports(interface, &port_mask))
2955 /* TODO: de-allocate everything */
2956 goto exit;
2957
2958 shared_int = hso_create_shared_int(interface);
2959 if (!shared_int)
2960 goto exit;
2961
2962 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2963 if (port_mask & i) {
2964 hso_dev = hso_create_mux_serial_device(
2965 interface, i, shared_int);
2966 if (!hso_dev)
2967 goto exit;
2968 }
2969 }
2970
2971 if (tmp_dev)
2972 hso_dev = tmp_dev;
2973 break;
2974
2975 case HSO_INTF_BULK:
2976 /* It's a regular bulk interface */
2977 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK)
2978 && !disable_net)
2979 hso_dev = hso_create_net_device(interface, port_spec);
2980 else
2981 hso_dev =
2982 hso_create_bulk_serial_device(interface, port_spec);
2983 if (!hso_dev)
2984 goto exit;
2985 break;
2986 default:
2987 goto exit;
2988 }
2989
2990 /* save our data pointer in this device */
2991 usb_set_intfdata(interface, hso_dev);
2992
2993 /* done */
2994 return 0;
2995 exit:
2996 hso_free_interface(interface);
2997 return -ENODEV;
2998 }
2999
3000 /* device removed, cleaning up */
3001 static void hso_disconnect(struct usb_interface *interface)
3002 {
3003 hso_free_interface(interface);
3004
3005 /* remove reference of our private data */
3006 usb_set_intfdata(interface, NULL);
3007 }
3008
3009 static void async_get_intf(struct work_struct *data)
3010 {
3011 struct hso_device *hso_dev =
3012 container_of(data, struct hso_device, async_get_intf);
3013 usb_autopm_get_interface(hso_dev->interface);
3014 }
3015
3016 static void async_put_intf(struct work_struct *data)
3017 {
3018 struct hso_device *hso_dev =
3019 container_of(data, struct hso_device, async_put_intf);
3020 usb_autopm_put_interface(hso_dev->interface);
3021 }
3022
3023 static int hso_get_activity(struct hso_device *hso_dev)
3024 {
3025 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3026 if (!hso_dev->is_active) {
3027 hso_dev->is_active = 1;
3028 schedule_work(&hso_dev->async_get_intf);
3029 }
3030 }
3031
3032 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3033 return -EAGAIN;
3034
3035 usb_mark_last_busy(hso_dev->usb);
3036
3037 return 0;
3038 }
3039
3040 static int hso_put_activity(struct hso_device *hso_dev)
3041 {
3042 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3043 if (hso_dev->is_active) {
3044 hso_dev->is_active = 0;
3045 schedule_work(&hso_dev->async_put_intf);
3046 return -EAGAIN;
3047 }
3048 }
3049 hso_dev->is_active = 0;
3050 return 0;
3051 }
3052
3053 /* called by kernel when we need to suspend device */
3054 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3055 {
3056 int i, result;
3057
3058 /* Stop all serial ports */
3059 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3060 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3061 result = hso_stop_serial_device(serial_table[i]);
3062 if (result)
3063 goto out;
3064 }
3065 }
3066
3067 /* Stop all network ports */
3068 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3069 if (network_table[i] &&
3070 (network_table[i]->interface == iface)) {
3071 result = hso_stop_net_device(network_table[i]);
3072 if (result)
3073 goto out;
3074 }
3075 }
3076
3077 out:
3078 return 0;
3079 }
3080
3081 /* called by kernel when we need to resume device */
3082 static int hso_resume(struct usb_interface *iface)
3083 {
3084 int i, result = 0;
3085 struct hso_net *hso_net;
3086
3087 /* Start all serial ports */
3088 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3089 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3090 if (dev2ser(serial_table[i])->open_count) {
3091 result =
3092 hso_start_serial_device(serial_table[i], GFP_NOIO);
3093 hso_kick_transmit(dev2ser(serial_table[i]));
3094 if (result)
3095 goto out;
3096 }
3097 }
3098 }
3099
3100 /* Start all network ports */
3101 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3102 if (network_table[i] &&
3103 (network_table[i]->interface == iface)) {
3104 hso_net = dev2net(network_table[i]);
3105 if (hso_net->flags & IFF_UP) {
3106 /* First transmit any lingering data,
3107 then restart the device. */
3108 if (hso_net->skb_tx_buf) {
3109 dev_dbg(&iface->dev,
3110 "Transmitting"
3111 " lingering data\n");
3112 hso_net_start_xmit(hso_net->skb_tx_buf,
3113 hso_net->net);
3114 hso_net->skb_tx_buf = NULL;
3115 }
3116 result = hso_start_net_device(network_table[i]);
3117 if (result)
3118 goto out;
3119 }
3120 }
3121 }
3122
3123 out:
3124 return result;
3125 }
3126
3127 static void hso_serial_ref_free(struct kref *ref)
3128 {
3129 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3130
3131 hso_free_serial_device(hso_dev);
3132 }
3133
3134 static void hso_free_interface(struct usb_interface *interface)
3135 {
3136 struct hso_serial *hso_dev;
3137 struct tty_struct *tty;
3138 int i;
3139
3140 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3141 if (serial_table[i]
3142 && (serial_table[i]->interface == interface)) {
3143 hso_dev = dev2ser(serial_table[i]);
3144 spin_lock_irq(&hso_dev->serial_lock);
3145 tty = tty_kref_get(hso_dev->tty);
3146 spin_unlock_irq(&hso_dev->serial_lock);
3147 if (tty)
3148 tty_hangup(tty);
3149 mutex_lock(&hso_dev->parent->mutex);
3150 tty_kref_put(tty);
3151 hso_dev->parent->usb_gone = 1;
3152 mutex_unlock(&hso_dev->parent->mutex);
3153 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3154 }
3155 }
3156
3157 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3158 if (network_table[i]
3159 && (network_table[i]->interface == interface)) {
3160 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3161 /* hso_stop_net_device doesn't stop the net queue since
3162 * traffic needs to start it again when suspended */
3163 netif_stop_queue(dev2net(network_table[i])->net);
3164 hso_stop_net_device(network_table[i]);
3165 cancel_work_sync(&network_table[i]->async_put_intf);
3166 cancel_work_sync(&network_table[i]->async_get_intf);
3167 if (rfk) {
3168 rfkill_unregister(rfk);
3169 rfkill_destroy(rfk);
3170 }
3171 hso_free_net_device(network_table[i]);
3172 }
3173 }
3174 }
3175
3176 /* Helper functions */
3177
3178 /* Get the endpoint ! */
3179 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3180 int type, int dir)
3181 {
3182 int i;
3183 struct usb_host_interface *iface = intf->cur_altsetting;
3184 struct usb_endpoint_descriptor *endp;
3185
3186 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3187 endp = &iface->endpoint[i].desc;
3188 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3189 (usb_endpoint_type(endp) == type))
3190 return endp;
3191 }
3192
3193 return NULL;
3194 }
3195
3196 /* Get the byte that describes which ports are enabled */
3197 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3198 {
3199 int i;
3200 struct usb_host_interface *iface = intf->cur_altsetting;
3201
3202 if (iface->extralen == 3) {
3203 *ports = iface->extra[2];
3204 return 0;
3205 }
3206
3207 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3208 if (iface->endpoint[i].extralen == 3) {
3209 *ports = iface->endpoint[i].extra[2];
3210 return 0;
3211 }
3212 }
3213
3214 return -1;
3215 }
3216
3217 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3218 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3219 struct usb_device *usb, gfp_t gfp)
3220 {
3221 int result;
3222
3223 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3224 usb_rcvintpipe(usb,
3225 shared_int->intr_endp->bEndpointAddress & 0x7F),
3226 shared_int->shared_intr_buf,
3227 shared_int->intr_endp->wMaxPacketSize,
3228 intr_callback, shared_int,
3229 shared_int->intr_endp->bInterval);
3230
3231 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3232 if (result)
3233 dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__,
3234 result);
3235
3236 return result;
3237 }
3238
3239 /* operations setup of the serial interface */
3240 static const struct tty_operations hso_serial_ops = {
3241 .open = hso_serial_open,
3242 .close = hso_serial_close,
3243 .write = hso_serial_write,
3244 .write_room = hso_serial_write_room,
3245 .ioctl = hso_serial_ioctl,
3246 .set_termios = hso_serial_set_termios,
3247 .chars_in_buffer = hso_serial_chars_in_buffer,
3248 .tiocmget = hso_serial_tiocmget,
3249 .tiocmset = hso_serial_tiocmset,
3250 .unthrottle = hso_unthrottle
3251 };
3252
3253 static struct usb_driver hso_driver = {
3254 .name = driver_name,
3255 .probe = hso_probe,
3256 .disconnect = hso_disconnect,
3257 .id_table = hso_ids,
3258 .suspend = hso_suspend,
3259 .resume = hso_resume,
3260 .reset_resume = hso_resume,
3261 .supports_autosuspend = 1,
3262 };
3263
3264 static int __init hso_init(void)
3265 {
3266 int i;
3267 int result;
3268
3269 /* put it in the log */
3270 printk(KERN_INFO "hso: %s\n", version);
3271
3272 /* Initialise the serial table semaphore and table */
3273 spin_lock_init(&serial_table_lock);
3274 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3275 serial_table[i] = NULL;
3276
3277 /* allocate our driver using the proper amount of supported minors */
3278 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3279 if (!tty_drv)
3280 return -ENOMEM;
3281
3282 /* fill in all needed values */
3283 tty_drv->magic = TTY_DRIVER_MAGIC;
3284 tty_drv->owner = THIS_MODULE;
3285 tty_drv->driver_name = driver_name;
3286 tty_drv->name = tty_filename;
3287
3288 /* if major number is provided as parameter, use that one */
3289 if (tty_major)
3290 tty_drv->major = tty_major;
3291
3292 tty_drv->minor_start = 0;
3293 tty_drv->num = HSO_SERIAL_TTY_MINORS;
3294 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3295 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3296 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3297 tty_drv->init_termios = tty_std_termios;
3298 hso_init_termios(&tty_drv->init_termios);
3299 tty_set_operations(tty_drv, &hso_serial_ops);
3300
3301 /* register the tty driver */
3302 result = tty_register_driver(tty_drv);
3303 if (result) {
3304 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3305 __func__, result);
3306 return result;
3307 }
3308
3309 /* register this module as an usb driver */
3310 result = usb_register(&hso_driver);
3311 if (result) {
3312 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3313 result);
3314 /* cleanup serial interface */
3315 tty_unregister_driver(tty_drv);
3316 return result;
3317 }
3318
3319 /* done */
3320 return 0;
3321 }
3322
3323 static void __exit hso_exit(void)
3324 {
3325 printk(KERN_INFO "hso: unloaded\n");
3326
3327 tty_unregister_driver(tty_drv);
3328 /* deregister the usb driver */
3329 usb_deregister(&hso_driver);
3330 }
3331
3332 /* Module definitions */
3333 module_init(hso_init);
3334 module_exit(hso_exit);
3335
3336 MODULE_AUTHOR(MOD_AUTHOR);
3337 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3338 MODULE_LICENSE(MOD_LICENSE);
3339 MODULE_INFO(Version, DRIVER_VERSION);
3340
3341 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3342 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3343 module_param(debug, int, S_IRUGO | S_IWUSR);
3344
3345 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3346 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3347 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3348
3349 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3350 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3351 module_param(disable_net, int, S_IRUGO | S_IWUSR);
Linux with added FPC-III support