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Adding support for MOXA ART SoC. Testing port of linux-2.6.32.60-moxart.
[linux-3.6.7-moxart.git] / drivers / net / usb / hso.c
blob62f30b46fa42d26544f20e3158e964eccaa05da4
1 /******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
6 * Filip Aben <f.aben@option.com>
7 * Denis Joseph Barrow <d.barow@option.com>
8 * Jan Dumon <j.dumon@option.com>
9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
10 * <ajb@spheresystems.co.uk>
11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
12 * Copyright (C) 2008 Novell, Inc.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
26 * USA
27 *
28 *
29 *****************************************************************************/
30
31 /******************************************************************************
32 *
33 * Description of the device:
34 *
35 * Interface 0: Contains the IP network interface on the bulk end points.
36 * The multiplexed serial ports are using the interrupt and
37 * control endpoints.
38 * Interrupt contains a bitmap telling which multiplexed
39 * serialport needs servicing.
40 *
41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
42 * port is opened, as this have a huge impact on the network port
43 * throughput.
44 *
45 * Interface 2: Standard modem interface - circuit switched interface, this
46 * can be used to make a standard ppp connection however it
47 * should not be used in conjunction with the IP network interface
48 * enabled for USB performance reasons i.e. if using this set
49 * ideally disable_net=1.
50 *
51 *****************************************************************************/
52
53 #include <linux/sched.h>
54 #include <linux/slab.h>
55 #include <linux/init.h>
56 #include <linux/delay.h>
57 #include <linux/netdevice.h>
58 #include <linux/module.h>
59 #include <linux/ethtool.h>
60 #include <linux/usb.h>
61 #include <linux/timer.h>
62 #include <linux/tty.h>
63 #include <linux/tty_driver.h>
64 #include <linux/tty_flip.h>
65 #include <linux/kmod.h>
66 #include <linux/rfkill.h>
67 #include <linux/ip.h>
68 #include <linux/uaccess.h>
69 #include <linux/usb/cdc.h>
70 #include <net/arp.h>
71 #include <asm/byteorder.h>
72 #include <linux/serial_core.h>
73 #include <linux/serial.h>
74
75
76 #define MOD_AUTHOR "Option Wireless"
77 #define MOD_DESCRIPTION "USB High Speed Option driver"
78 #define MOD_LICENSE "GPL"
79
80 #define HSO_MAX_NET_DEVICES 10
81 #define HSO__MAX_MTU 2048
82 #define DEFAULT_MTU 1500
83 #define DEFAULT_MRU 1500
84
85 #define CTRL_URB_RX_SIZE 1024
86 #define CTRL_URB_TX_SIZE 64
87
88 #define BULK_URB_RX_SIZE 4096
89 #define BULK_URB_TX_SIZE 8192
90
91 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
92 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
93 #define MUX_BULK_RX_BUF_COUNT 4
94 #define USB_TYPE_OPTION_VENDOR 0x20
95
96 /* These definitions are used with the struct hso_net flags element */
97 /* - use *_bit operations on it. (bit indices not values.) */
98 #define HSO_NET_RUNNING 0
99
100 #define HSO_NET_TX_TIMEOUT (HZ*10)
101
102 #define HSO_SERIAL_MAGIC 0x48534f31
103
104 /* Number of ttys to handle */
105 #define HSO_SERIAL_TTY_MINORS 256
106
107 #define MAX_RX_URBS 2
108
109 /*****************************************************************************/
110 /* Debugging functions */
111 /*****************************************************************************/
112 #define D__(lvl_, fmt, arg...) \
113 do { \
114 printk(lvl_ "[%d:%s]: " fmt "\n", \
115 __LINE__, __func__, ## arg); \
116 } while (0)
117
118 #define D_(lvl, args...) \
119 do { \
120 if (lvl & debug) \
121 D__(KERN_INFO, args); \
122 } while (0)
123
124 #define D1(args...) D_(0x01, ##args)
125 #define D2(args...) D_(0x02, ##args)
126 #define D3(args...) D_(0x04, ##args)
127 #define D4(args...) D_(0x08, ##args)
128 #define D5(args...) D_(0x10, ##args)
129
130 /*****************************************************************************/
131 /* Enumerators */
132 /*****************************************************************************/
133 enum pkt_parse_state {
134 WAIT_IP,
135 WAIT_DATA,
136 WAIT_SYNC
137 };
138
139 /*****************************************************************************/
140 /* Structs */
141 /*****************************************************************************/
142
143 struct hso_shared_int {
144 struct usb_endpoint_descriptor *intr_endp;
145 void *shared_intr_buf;
146 struct urb *shared_intr_urb;
147 struct usb_device *usb;
148 int use_count;
149 int ref_count;
150 struct mutex shared_int_lock;
151 };
152
153 struct hso_net {
154 struct hso_device *parent;
155 struct net_device *net;
156 struct rfkill *rfkill;
157
158 struct usb_endpoint_descriptor *in_endp;
159 struct usb_endpoint_descriptor *out_endp;
160
161 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
162 struct urb *mux_bulk_tx_urb;
163 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
164 void *mux_bulk_tx_buf;
165
166 struct sk_buff *skb_rx_buf;
167 struct sk_buff *skb_tx_buf;
168
169 enum pkt_parse_state rx_parse_state;
170 spinlock_t net_lock;
171
172 unsigned short rx_buf_size;
173 unsigned short rx_buf_missing;
174 struct iphdr rx_ip_hdr;
175
176 unsigned long flags;
177 };
178
179 enum rx_ctrl_state{
180 RX_IDLE,
181 RX_SENT,
182 RX_PENDING
183 };
184
185 #define BM_REQUEST_TYPE (0xa1)
186 #define B_NOTIFICATION (0x20)
187 #define W_VALUE (0x0)
188 #define W_INDEX (0x2)
189 #define W_LENGTH (0x2)
190
191 #define B_OVERRUN (0x1<<6)
192 #define B_PARITY (0x1<<5)
193 #define B_FRAMING (0x1<<4)
194 #define B_RING_SIGNAL (0x1<<3)
195 #define B_BREAK (0x1<<2)
196 #define B_TX_CARRIER (0x1<<1)
197 #define B_RX_CARRIER (0x1<<0)
198
199 struct hso_serial_state_notification {
200 u8 bmRequestType;
201 u8 bNotification;
202 u16 wValue;
203 u16 wIndex;
204 u16 wLength;
205 u16 UART_state_bitmap;
206 } __packed;
207
208 struct hso_tiocmget {
209 struct mutex mutex;
210 wait_queue_head_t waitq;
211 int intr_completed;
212 struct usb_endpoint_descriptor *endp;
213 struct urb *urb;
214 struct hso_serial_state_notification serial_state_notification;
215 u16 prev_UART_state_bitmap;
216 struct uart_icount icount;
217 };
218
219
220 struct hso_serial {
221 struct hso_device *parent;
222 int magic;
223 u8 minor;
224
225 struct hso_shared_int *shared_int;
226
227 /* rx/tx urb could be either a bulk urb or a control urb depending
228 on which serial port it is used on. */
229 struct urb *rx_urb[MAX_RX_URBS];
230 u8 num_rx_urbs;
231 u8 *rx_data[MAX_RX_URBS];
232 u16 rx_data_length; /* should contain allocated length */
233
234 struct urb *tx_urb;
235 u8 *tx_data;
236 u8 *tx_buffer;
237 u16 tx_data_length; /* should contain allocated length */
238 u16 tx_data_count;
239 u16 tx_buffer_count;
240 struct usb_ctrlrequest ctrl_req_tx;
241 struct usb_ctrlrequest ctrl_req_rx;
242
243 struct usb_endpoint_descriptor *in_endp;
244 struct usb_endpoint_descriptor *out_endp;
245
246 enum rx_ctrl_state rx_state;
247 u8 rts_state;
248 u8 dtr_state;
249 unsigned tx_urb_used:1;
250
251 struct tty_port port;
252 /* from usb_serial_port */
253 spinlock_t serial_lock;
254
255 int (*write_data) (struct hso_serial *serial);
256 struct hso_tiocmget *tiocmget;
257 /* Hacks required to get flow control
258 * working on the serial receive buffers
259 * so as not to drop characters on the floor.
260 */
261 int curr_rx_urb_idx;
262 u16 curr_rx_urb_offset;
263 u8 rx_urb_filled[MAX_RX_URBS];
264 struct tasklet_struct unthrottle_tasklet;
265 struct work_struct retry_unthrottle_workqueue;
266 };
267
268 struct hso_device {
269 union {
270 struct hso_serial *dev_serial;
271 struct hso_net *dev_net;
272 } port_data;
273
274 u32 port_spec;
275
276 u8 is_active;
277 u8 usb_gone;
278 struct work_struct async_get_intf;
279 struct work_struct async_put_intf;
280 struct work_struct reset_device;
281
282 struct usb_device *usb;
283 struct usb_interface *interface;
284
285 struct device *dev;
286 struct kref ref;
287 struct mutex mutex;
288 };
289
290 /* Type of interface */
291 #define HSO_INTF_MASK 0xFF00
292 #define HSO_INTF_MUX 0x0100
293 #define HSO_INTF_BULK 0x0200
294
295 /* Type of port */
296 #define HSO_PORT_MASK 0xFF
297 #define HSO_PORT_NO_PORT 0x0
298 #define HSO_PORT_CONTROL 0x1
299 #define HSO_PORT_APP 0x2
300 #define HSO_PORT_GPS 0x3
301 #define HSO_PORT_PCSC 0x4
302 #define HSO_PORT_APP2 0x5
303 #define HSO_PORT_GPS_CONTROL 0x6
304 #define HSO_PORT_MSD 0x7
305 #define HSO_PORT_VOICE 0x8
306 #define HSO_PORT_DIAG2 0x9
307 #define HSO_PORT_DIAG 0x10
308 #define HSO_PORT_MODEM 0x11
309 #define HSO_PORT_NETWORK 0x12
310
311 /* Additional device info */
312 #define HSO_INFO_MASK 0xFF000000
313 #define HSO_INFO_CRC_BUG 0x01000000
314
315 /*****************************************************************************/
316 /* Prototypes */
317 /*****************************************************************************/
318 /* Serial driver functions */
319 static int hso_serial_tiocmset(struct tty_struct *tty,
320 unsigned int set, unsigned int clear);
321 static void ctrl_callback(struct urb *urb);
322 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
323 static void hso_kick_transmit(struct hso_serial *serial);
324 /* Helper functions */
325 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
326 struct usb_device *usb, gfp_t gfp);
327 static void handle_usb_error(int status, const char *function,
328 struct hso_device *hso_dev);
329 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
330 int type, int dir);
331 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
332 static void hso_free_interface(struct usb_interface *intf);
333 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
334 static int hso_stop_serial_device(struct hso_device *hso_dev);
335 static int hso_start_net_device(struct hso_device *hso_dev);
336 static void hso_free_shared_int(struct hso_shared_int *shared_int);
337 static int hso_stop_net_device(struct hso_device *hso_dev);
338 static void hso_serial_ref_free(struct kref *ref);
339 static void hso_std_serial_read_bulk_callback(struct urb *urb);
340 static int hso_mux_serial_read(struct hso_serial *serial);
341 static void async_get_intf(struct work_struct *data);
342 static void async_put_intf(struct work_struct *data);
343 static int hso_put_activity(struct hso_device *hso_dev);
344 static int hso_get_activity(struct hso_device *hso_dev);
345 static void tiocmget_intr_callback(struct urb *urb);
346 static void reset_device(struct work_struct *data);
347 /*****************************************************************************/
348 /* Helping functions */
349 /*****************************************************************************/
350
351 /* #define DEBUG */
352
353 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
354 {
355 return hso_dev->port_data.dev_net;
356 }
357
358 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
359 {
360 return hso_dev->port_data.dev_serial;
361 }
362
363 /* Debugging functions */
364 #ifdef DEBUG
365 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
366 unsigned int len)
367 {
368 static char name[255];
369
370 sprintf(name, "hso[%d:%s]", line_count, func_name);
371 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
372 }
373
374 #define DUMP(buf_, len_) \
375 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
376
377 #define DUMP1(buf_, len_) \
378 do { \
379 if (0x01 & debug) \
380 DUMP(buf_, len_); \
381 } while (0)
382 #else
383 #define DUMP(buf_, len_)
384 #define DUMP1(buf_, len_)
385 #endif
386
387 /* module parameters */
388 static int debug;
389 static int tty_major;
390 static int disable_net;
391
392 /* driver info */
393 static const char driver_name[] = "hso";
394 static const char tty_filename[] = "ttyHS";
395 static const char *version = __FILE__ ": " MOD_AUTHOR;
396 /* the usb driver itself (registered in hso_init) */
397 static struct usb_driver hso_driver;
398 /* serial structures */
399 static struct tty_driver *tty_drv;
400 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
401 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
402 static spinlock_t serial_table_lock;
403
404 static const s32 default_port_spec[] = {
405 HSO_INTF_MUX | HSO_PORT_NETWORK,
406 HSO_INTF_BULK | HSO_PORT_DIAG,
407 HSO_INTF_BULK | HSO_PORT_MODEM,
408 0
409 };
410
411 static const s32 icon321_port_spec[] = {
412 HSO_INTF_MUX | HSO_PORT_NETWORK,
413 HSO_INTF_BULK | HSO_PORT_DIAG2,
414 HSO_INTF_BULK | HSO_PORT_MODEM,
415 HSO_INTF_BULK | HSO_PORT_DIAG,
416 0
417 };
418
419 #define default_port_device(vendor, product) \
420 USB_DEVICE(vendor, product), \
421 .driver_info = (kernel_ulong_t)default_port_spec
422
423 #define icon321_port_device(vendor, product) \
424 USB_DEVICE(vendor, product), \
425 .driver_info = (kernel_ulong_t)icon321_port_spec
426
427 /* list of devices we support */
428 static const struct usb_device_id hso_ids[] = {
429 {default_port_device(0x0af0, 0x6711)},
430 {default_port_device(0x0af0, 0x6731)},
431 {default_port_device(0x0af0, 0x6751)},
432 {default_port_device(0x0af0, 0x6771)},
433 {default_port_device(0x0af0, 0x6791)},
434 {default_port_device(0x0af0, 0x6811)},
435 {default_port_device(0x0af0, 0x6911)},
436 {default_port_device(0x0af0, 0x6951)},
437 {default_port_device(0x0af0, 0x6971)},
438 {default_port_device(0x0af0, 0x7011)},
439 {default_port_device(0x0af0, 0x7031)},
440 {default_port_device(0x0af0, 0x7051)},
441 {default_port_device(0x0af0, 0x7071)},
442 {default_port_device(0x0af0, 0x7111)},
443 {default_port_device(0x0af0, 0x7211)},
444 {default_port_device(0x0af0, 0x7251)},
445 {default_port_device(0x0af0, 0x7271)},
446 {default_port_device(0x0af0, 0x7311)},
447 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
448 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
449 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
450 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
451 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
452 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
453 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
454 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
455 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
456 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
457 {USB_DEVICE(0x0af0, 0x7701)},
458 {USB_DEVICE(0x0af0, 0x7706)},
459 {USB_DEVICE(0x0af0, 0x7801)},
460 {USB_DEVICE(0x0af0, 0x7901)},
461 {USB_DEVICE(0x0af0, 0x7A01)},
462 {USB_DEVICE(0x0af0, 0x7A05)},
463 {USB_DEVICE(0x0af0, 0x8200)},
464 {USB_DEVICE(0x0af0, 0x8201)},
465 {USB_DEVICE(0x0af0, 0x8300)},
466 {USB_DEVICE(0x0af0, 0x8302)},
467 {USB_DEVICE(0x0af0, 0x8304)},
468 {USB_DEVICE(0x0af0, 0x8400)},
469 {USB_DEVICE(0x0af0, 0x8600)},
470 {USB_DEVICE(0x0af0, 0x8800)},
471 {USB_DEVICE(0x0af0, 0x8900)},
472 {USB_DEVICE(0x0af0, 0x9000)},
473 {USB_DEVICE(0x0af0, 0xd035)},
474 {USB_DEVICE(0x0af0, 0xd055)},
475 {USB_DEVICE(0x0af0, 0xd155)},
476 {USB_DEVICE(0x0af0, 0xd255)},
477 {USB_DEVICE(0x0af0, 0xd057)},
478 {USB_DEVICE(0x0af0, 0xd157)},
479 {USB_DEVICE(0x0af0, 0xd257)},
480 {USB_DEVICE(0x0af0, 0xd357)},
481 {USB_DEVICE(0x0af0, 0xd058)},
482 {USB_DEVICE(0x0af0, 0xc100)},
483 {}
484 };
485 MODULE_DEVICE_TABLE(usb, hso_ids);
486
487 /* Sysfs attribute */
488 static ssize_t hso_sysfs_show_porttype(struct device *dev,
489 struct device_attribute *attr,
490 char *buf)
491 {
492 struct hso_device *hso_dev = dev_get_drvdata(dev);
493 char *port_name;
494
495 if (!hso_dev)
496 return 0;
497
498 switch (hso_dev->port_spec & HSO_PORT_MASK) {
499 case HSO_PORT_CONTROL:
500 port_name = "Control";
501 break;
502 case HSO_PORT_APP:
503 port_name = "Application";
504 break;
505 case HSO_PORT_APP2:
506 port_name = "Application2";
507 break;
508 case HSO_PORT_GPS:
509 port_name = "GPS";
510 break;
511 case HSO_PORT_GPS_CONTROL:
512 port_name = "GPS Control";
513 break;
514 case HSO_PORT_PCSC:
515 port_name = "PCSC";
516 break;
517 case HSO_PORT_DIAG:
518 port_name = "Diagnostic";
519 break;
520 case HSO_PORT_DIAG2:
521 port_name = "Diagnostic2";
522 break;
523 case HSO_PORT_MODEM:
524 port_name = "Modem";
525 break;
526 case HSO_PORT_NETWORK:
527 port_name = "Network";
528 break;
529 default:
530 port_name = "Unknown";
531 break;
532 }
533
534 return sprintf(buf, "%s\n", port_name);
535 }
536 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
537
538 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
539 {
540 int idx;
541
542 for (idx = 0; idx < serial->num_rx_urbs; idx++)
543 if (serial->rx_urb[idx] == urb)
544 return idx;
545 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
546 return -1;
547 }
548
549 /* converts mux value to a port spec value */
550 static u32 hso_mux_to_port(int mux)
551 {
552 u32 result;
553
554 switch (mux) {
555 case 0x1:
556 result = HSO_PORT_CONTROL;
557 break;
558 case 0x2:
559 result = HSO_PORT_APP;
560 break;
561 case 0x4:
562 result = HSO_PORT_PCSC;
563 break;
564 case 0x8:
565 result = HSO_PORT_GPS;
566 break;
567 case 0x10:
568 result = HSO_PORT_APP2;
569 break;
570 default:
571 result = HSO_PORT_NO_PORT;
572 }
573 return result;
574 }
575
576 /* converts port spec value to a mux value */
577 static u32 hso_port_to_mux(int port)
578 {
579 u32 result;
580
581 switch (port & HSO_PORT_MASK) {
582 case HSO_PORT_CONTROL:
583 result = 0x0;
584 break;
585 case HSO_PORT_APP:
586 result = 0x1;
587 break;
588 case HSO_PORT_PCSC:
589 result = 0x2;
590 break;
591 case HSO_PORT_GPS:
592 result = 0x3;
593 break;
594 case HSO_PORT_APP2:
595 result = 0x4;
596 break;
597 default:
598 result = 0x0;
599 }
600 return result;
601 }
602
603 static struct hso_serial *get_serial_by_shared_int_and_type(
604 struct hso_shared_int *shared_int,
605 int mux)
606 {
607 int i, port;
608
609 port = hso_mux_to_port(mux);
610
611 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
612 if (serial_table[i] &&
613 (dev2ser(serial_table[i])->shared_int == shared_int) &&
614 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
615 return dev2ser(serial_table[i]);
616 }
617 }
618
619 return NULL;
620 }
621
622 static struct hso_serial *get_serial_by_index(unsigned index)
623 {
624 struct hso_serial *serial = NULL;
625 unsigned long flags;
626
627 spin_lock_irqsave(&serial_table_lock, flags);
628 if (serial_table[index])
629 serial = dev2ser(serial_table[index]);
630 spin_unlock_irqrestore(&serial_table_lock, flags);
631
632 return serial;
633 }
634
635 static int get_free_serial_index(void)
636 {
637 int index;
638 unsigned long flags;
639
640 spin_lock_irqsave(&serial_table_lock, flags);
641 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
642 if (serial_table[index] == NULL) {
643 spin_unlock_irqrestore(&serial_table_lock, flags);
644 return index;
645 }
646 }
647 spin_unlock_irqrestore(&serial_table_lock, flags);
648
649 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
650 return -1;
651 }
652
653 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
654 {
655 unsigned long flags;
656
657 spin_lock_irqsave(&serial_table_lock, flags);
658 if (serial)
659 serial_table[index] = serial->parent;
660 else
661 serial_table[index] = NULL;
662 spin_unlock_irqrestore(&serial_table_lock, flags);
663 }
664
665 static void handle_usb_error(int status, const char *function,
666 struct hso_device *hso_dev)
667 {
668 char *explanation;
669
670 switch (status) {
671 case -ENODEV:
672 explanation = "no device";
673 break;
674 case -ENOENT:
675 explanation = "endpoint not enabled";
676 break;
677 case -EPIPE:
678 explanation = "endpoint stalled";
679 break;
680 case -ENOSPC:
681 explanation = "not enough bandwidth";
682 break;
683 case -ESHUTDOWN:
684 explanation = "device disabled";
685 break;
686 case -EHOSTUNREACH:
687 explanation = "device suspended";
688 break;
689 case -EINVAL:
690 case -EAGAIN:
691 case -EFBIG:
692 case -EMSGSIZE:
693 explanation = "internal error";
694 break;
695 case -EILSEQ:
696 case -EPROTO:
697 case -ETIME:
698 case -ETIMEDOUT:
699 explanation = "protocol error";
700 if (hso_dev)
701 schedule_work(&hso_dev->reset_device);
702 break;
703 default:
704 explanation = "unknown status";
705 break;
706 }
707
708 /* log a meaningful explanation of an USB status */
709 D1("%s: received USB status - %s (%d)", function, explanation, status);
710 }
711
712 /* Network interface functions */
713
714 /* called when net interface is brought up by ifconfig */
715 static int hso_net_open(struct net_device *net)
716 {
717 struct hso_net *odev = netdev_priv(net);
718 unsigned long flags = 0;
719
720 if (!odev) {
721 dev_err(&net->dev, "No net device !\n");
722 return -ENODEV;
723 }
724
725 odev->skb_tx_buf = NULL;
726
727 /* setup environment */
728 spin_lock_irqsave(&odev->net_lock, flags);
729 odev->rx_parse_state = WAIT_IP;
730 odev->rx_buf_size = 0;
731 odev->rx_buf_missing = sizeof(struct iphdr);
732 spin_unlock_irqrestore(&odev->net_lock, flags);
733
734 /* We are up and running. */
735 set_bit(HSO_NET_RUNNING, &odev->flags);
736 hso_start_net_device(odev->parent);
737
738 /* Tell the kernel we are ready to start receiving from it */
739 netif_start_queue(net);
740
741 return 0;
742 }
743
744 /* called when interface is brought down by ifconfig */
745 static int hso_net_close(struct net_device *net)
746 {
747 struct hso_net *odev = netdev_priv(net);
748
749 /* we don't need the queue anymore */
750 netif_stop_queue(net);
751 /* no longer running */
752 clear_bit(HSO_NET_RUNNING, &odev->flags);
753
754 hso_stop_net_device(odev->parent);
755
756 /* done */
757 return 0;
758 }
759
760 /* USB tells is xmit done, we should start the netqueue again */
761 static void write_bulk_callback(struct urb *urb)
762 {
763 struct hso_net *odev = urb->context;
764 int status = urb->status;
765
766 /* Sanity check */
767 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
768 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
769 return;
770 }
771
772 /* Do we still have a valid kernel network device? */
773 if (!netif_device_present(odev->net)) {
774 dev_err(&urb->dev->dev, "%s: net device not present\n",
775 __func__);
776 return;
777 }
778
779 /* log status, but don't act on it, we don't need to resubmit anything
780 * anyhow */
781 if (status)
782 handle_usb_error(status, __func__, odev->parent);
783
784 hso_put_activity(odev->parent);
785
786 /* Tell the network interface we are ready for another frame */
787 netif_wake_queue(odev->net);
788 }
789
790 /* called by kernel when we need to transmit a packet */
791 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
792 struct net_device *net)
793 {
794 struct hso_net *odev = netdev_priv(net);
795 int result;
796
797 /* Tell the kernel, "No more frames 'til we are done with this one." */
798 netif_stop_queue(net);
799 if (hso_get_activity(odev->parent) == -EAGAIN) {
800 odev->skb_tx_buf = skb;
801 return NETDEV_TX_OK;
802 }
803
804 /* log if asked */
805 DUMP1(skb->data, skb->len);
806 /* Copy it from kernel memory to OUR memory */
807 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
808 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
809
810 /* Fill in the URB for shipping it out. */
811 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
812 odev->parent->usb,
813 usb_sndbulkpipe(odev->parent->usb,
814 odev->out_endp->
815 bEndpointAddress & 0x7F),
816 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
817 odev);
818
819 /* Deal with the Zero Length packet problem, I hope */
820 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
821
822 /* Send the URB on its merry way. */
823 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
824 if (result) {
825 dev_warn(&odev->parent->interface->dev,
826 "failed mux_bulk_tx_urb %d\n", result);
827 net->stats.tx_errors++;
828 netif_start_queue(net);
829 } else {
830 net->stats.tx_packets++;
831 net->stats.tx_bytes += skb->len;
832 }
833 dev_kfree_skb(skb);
834 /* we're done */
835 return NETDEV_TX_OK;
836 }
837
838 static const struct ethtool_ops ops = {
839 .get_link = ethtool_op_get_link
840 };
841
842 /* called when a packet did not ack after watchdogtimeout */
843 static void hso_net_tx_timeout(struct net_device *net)
844 {
845 struct hso_net *odev = netdev_priv(net);
846
847 if (!odev)
848 return;
849
850 /* Tell syslog we are hosed. */
851 dev_warn(&net->dev, "Tx timed out.\n");
852
853 /* Tear the waiting frame off the list */
854 if (odev->mux_bulk_tx_urb &&
855 (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
856 usb_unlink_urb(odev->mux_bulk_tx_urb);
857
858 /* Update statistics */
859 net->stats.tx_errors++;
860 }
861
862 /* make a real packet from the received USB buffer */
863 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
864 unsigned int count, unsigned char is_eop)
865 {
866 unsigned short temp_bytes;
867 unsigned short buffer_offset = 0;
868 unsigned short frame_len;
869 unsigned char *tmp_rx_buf;
870
871 /* log if needed */
872 D1("Rx %d bytes", count);
873 DUMP(ip_pkt, min(128, (int)count));
874
875 while (count) {
876 switch (odev->rx_parse_state) {
877 case WAIT_IP:
878 /* waiting for IP header. */
879 /* wanted bytes - size of ip header */
880 temp_bytes =
881 (count <
882 odev->rx_buf_missing) ? count : odev->
883 rx_buf_missing;
884
885 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
886 odev->rx_buf_size, ip_pkt + buffer_offset,
887 temp_bytes);
888
889 odev->rx_buf_size += temp_bytes;
890 buffer_offset += temp_bytes;
891 odev->rx_buf_missing -= temp_bytes;
892 count -= temp_bytes;
893
894 if (!odev->rx_buf_missing) {
895 /* header is complete allocate an sk_buffer and
896 * continue to WAIT_DATA */
897 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
898
899 if ((frame_len > DEFAULT_MRU) ||
900 (frame_len < sizeof(struct iphdr))) {
901 dev_err(&odev->net->dev,
902 "Invalid frame (%d) length\n",
903 frame_len);
904 odev->rx_parse_state = WAIT_SYNC;
905 continue;
906 }
907 /* Allocate an sk_buff */
908 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
909 frame_len);
910 if (!odev->skb_rx_buf) {
911 /* We got no receive buffer. */
912 D1("could not allocate memory");
913 odev->rx_parse_state = WAIT_SYNC;
914 return;
915 }
916
917 /* Copy what we got so far. make room for iphdr
918 * after tail. */
919 tmp_rx_buf =
920 skb_put(odev->skb_rx_buf,
921 sizeof(struct iphdr));
922 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
923 sizeof(struct iphdr));
924
925 /* ETH_HLEN */
926 odev->rx_buf_size = sizeof(struct iphdr);
927
928 /* Filip actually use .tot_len */
929 odev->rx_buf_missing =
930 frame_len - sizeof(struct iphdr);
931 odev->rx_parse_state = WAIT_DATA;
932 }
933 break;
934
935 case WAIT_DATA:
936 temp_bytes = (count < odev->rx_buf_missing)
937 ? count : odev->rx_buf_missing;
938
939 /* Copy the rest of the bytes that are left in the
940 * buffer into the waiting sk_buf. */
941 /* Make room for temp_bytes after tail. */
942 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
943 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
944
945 odev->rx_buf_missing -= temp_bytes;
946 count -= temp_bytes;
947 buffer_offset += temp_bytes;
948 odev->rx_buf_size += temp_bytes;
949 if (!odev->rx_buf_missing) {
950 /* Packet is complete. Inject into stack. */
951 /* We have IP packet here */
952 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
953 skb_reset_mac_header(odev->skb_rx_buf);
954
955 /* Ship it off to the kernel */
956 netif_rx(odev->skb_rx_buf);
957 /* No longer our buffer. */
958 odev->skb_rx_buf = NULL;
959
960 /* update out statistics */
961 odev->net->stats.rx_packets++;
962
963 odev->net->stats.rx_bytes += odev->rx_buf_size;
964
965 odev->rx_buf_size = 0;
966 odev->rx_buf_missing = sizeof(struct iphdr);
967 odev->rx_parse_state = WAIT_IP;
968 }
969 break;
970
971 case WAIT_SYNC:
972 D1(" W_S");
973 count = 0;
974 break;
975 default:
976 D1(" ");
977 count--;
978 break;
979 }
980 }
981
982 /* Recovery mechanism for WAIT_SYNC state. */
983 if (is_eop) {
984 if (odev->rx_parse_state == WAIT_SYNC) {
985 odev->rx_parse_state = WAIT_IP;
986 odev->rx_buf_size = 0;
987 odev->rx_buf_missing = sizeof(struct iphdr);
988 }
989 }
990 }
991
992 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
993 {
994 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
995 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
996
997 if (((rest == 5) || (rest == 6)) &&
998 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
999 crc_check, 4)) {
1000 urb->actual_length -= 4;
1001 }
1002 }
1003
1004 /* Moving data from usb to kernel (in interrupt state) */
1005 static void read_bulk_callback(struct urb *urb)
1006 {
1007 struct hso_net *odev = urb->context;
1008 struct net_device *net;
1009 int result;
1010 int status = urb->status;
1011
1012 /* is al ok? (Filip: Who's Al ?) */
1013 if (status) {
1014 handle_usb_error(status, __func__, odev->parent);
1015 return;
1016 }
1017
1018 /* Sanity check */
1019 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1020 D1("BULK IN callback but driver is not active!");
1021 return;
1022 }
1023 usb_mark_last_busy(urb->dev);
1024
1025 net = odev->net;
1026
1027 if (!netif_device_present(net)) {
1028 /* Somebody killed our network interface... */
1029 return;
1030 }
1031
1032 if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1033 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1034
1035 /* do we even have a packet? */
1036 if (urb->actual_length) {
1037 /* Handle the IP stream, add header and push it onto network
1038 * stack if the packet is complete. */
1039 spin_lock(&odev->net_lock);
1040 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1041 (urb->transfer_buffer_length >
1042 urb->actual_length) ? 1 : 0);
1043 spin_unlock(&odev->net_lock);
1044 }
1045
1046 /* We are done with this URB, resubmit it. Prep the USB to wait for
1047 * another frame. Reuse same as received. */
1048 usb_fill_bulk_urb(urb,
1049 odev->parent->usb,
1050 usb_rcvbulkpipe(odev->parent->usb,
1051 odev->in_endp->
1052 bEndpointAddress & 0x7F),
1053 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1054 read_bulk_callback, odev);
1055
1056 /* Give this to the USB subsystem so it can tell us when more data
1057 * arrives. */
1058 result = usb_submit_urb(urb, GFP_ATOMIC);
1059 if (result)
1060 dev_warn(&odev->parent->interface->dev,
1061 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1062 result);
1063 }
1064
1065 /* Serial driver functions */
1066
1067 static void hso_init_termios(struct ktermios *termios)
1068 {
1069 /*
1070 * The default requirements for this device are:
1071 */
1072 termios->c_iflag &=
1073 ~(IGNBRK /* disable ignore break */
1074 | BRKINT /* disable break causes interrupt */
1075 | PARMRK /* disable mark parity errors */
1076 | ISTRIP /* disable clear high bit of input characters */
1077 | INLCR /* disable translate NL to CR */
1078 | IGNCR /* disable ignore CR */
1079 | ICRNL /* disable translate CR to NL */
1080 | IXON); /* disable enable XON/XOFF flow control */
1081
1082 /* disable postprocess output characters */
1083 termios->c_oflag &= ~OPOST;
1084
1085 termios->c_lflag &=
1086 ~(ECHO /* disable echo input characters */
1087 | ECHONL /* disable echo new line */
1088 | ICANON /* disable erase, kill, werase, and rprnt
1089 special characters */
1090 | ISIG /* disable interrupt, quit, and suspend special
1091 characters */
1092 | IEXTEN); /* disable non-POSIX special characters */
1093
1094 termios->c_cflag &=
1095 ~(CSIZE /* no size */
1096 | PARENB /* disable parity bit */
1097 | CBAUD /* clear current baud rate */
1098 | CBAUDEX); /* clear current buad rate */
1099
1100 termios->c_cflag |= CS8; /* character size 8 bits */
1101
1102 /* baud rate 115200 */
1103 tty_termios_encode_baud_rate(termios, 115200, 115200);
1104 }
1105
1106 static void _hso_serial_set_termios(struct tty_struct *tty,
1107 struct ktermios *old)
1108 {
1109 struct hso_serial *serial = tty->driver_data;
1110 struct ktermios *termios;
1111
1112 if (!serial) {
1113 printk(KERN_ERR "%s: no tty structures", __func__);
1114 return;
1115 }
1116
1117 D4("port %d", serial->minor);
1118
1119 /*
1120 * Fix up unsupported bits
1121 */
1122 termios = tty->termios;
1123 termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1124
1125 termios->c_cflag &=
1126 ~(CSIZE /* no size */
1127 | PARENB /* disable parity bit */
1128 | CBAUD /* clear current baud rate */
1129 | CBAUDEX); /* clear current buad rate */
1130
1131 termios->c_cflag |= CS8; /* character size 8 bits */
1132
1133 /* baud rate 115200 */
1134 tty_encode_baud_rate(tty, 115200, 115200);
1135 }
1136
1137 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1138 {
1139 int result;
1140 /* We are done with this URB, resubmit it. Prep the USB to wait for
1141 * another frame */
1142 usb_fill_bulk_urb(urb, serial->parent->usb,
1143 usb_rcvbulkpipe(serial->parent->usb,
1144 serial->in_endp->
1145 bEndpointAddress & 0x7F),
1146 urb->transfer_buffer, serial->rx_data_length,
1147 hso_std_serial_read_bulk_callback, serial);
1148 /* Give this to the USB subsystem so it can tell us when more data
1149 * arrives. */
1150 result = usb_submit_urb(urb, GFP_ATOMIC);
1151 if (result) {
1152 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1153 __func__, result);
1154 }
1155 }
1156
1157
1158
1159
1160 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1161 {
1162 int count;
1163 struct urb *curr_urb;
1164
1165 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1166 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1167 count = put_rxbuf_data(curr_urb, serial);
1168 if (count == -1)
1169 return;
1170 if (count == 0) {
1171 serial->curr_rx_urb_idx++;
1172 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1173 serial->curr_rx_urb_idx = 0;
1174 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1175 }
1176 }
1177 }
1178
1179 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1180 {
1181 int count = 0;
1182 struct urb *urb;
1183
1184 urb = serial->rx_urb[0];
1185 if (serial->port.count > 0) {
1186 count = put_rxbuf_data(urb, serial);
1187 if (count == -1)
1188 return;
1189 }
1190 /* Re issue a read as long as we receive data. */
1191
1192 if (count == 0 && ((urb->actual_length != 0) ||
1193 (serial->rx_state == RX_PENDING))) {
1194 serial->rx_state = RX_SENT;
1195 hso_mux_serial_read(serial);
1196 } else
1197 serial->rx_state = RX_IDLE;
1198 }
1199
1200
1201 /* read callback for Diag and CS port */
1202 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1203 {
1204 struct hso_serial *serial = urb->context;
1205 int status = urb->status;
1206
1207 /* sanity check */
1208 if (!serial) {
1209 D1("serial == NULL");
1210 return;
1211 } else if (status) {
1212 handle_usb_error(status, __func__, serial->parent);
1213 return;
1214 }
1215
1216 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1217 D1("Actual length = %d\n", urb->actual_length);
1218 DUMP1(urb->transfer_buffer, urb->actual_length);
1219
1220 /* Anyone listening? */
1221 if (serial->port.count == 0)
1222 return;
1223
1224 if (status == 0) {
1225 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1226 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1227 /* Valid data, handle RX data */
1228 spin_lock(&serial->serial_lock);
1229 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1230 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1231 spin_unlock(&serial->serial_lock);
1232 } else if (status == -ENOENT || status == -ECONNRESET) {
1233 /* Unlinked - check for throttled port. */
1234 D2("Port %d, successfully unlinked urb", serial->minor);
1235 spin_lock(&serial->serial_lock);
1236 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1237 hso_resubmit_rx_bulk_urb(serial, urb);
1238 spin_unlock(&serial->serial_lock);
1239 } else {
1240 D2("Port %d, status = %d for read urb", serial->minor, status);
1241 return;
1242 }
1243 }
1244
1245 /*
1246 * This needs to be a tasklet otherwise we will
1247 * end up recursively calling this function.
1248 */
1249 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1250 {
1251 unsigned long flags;
1252
1253 spin_lock_irqsave(&serial->serial_lock, flags);
1254 if ((serial->parent->port_spec & HSO_INTF_MUX))
1255 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1256 else
1257 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1258 spin_unlock_irqrestore(&serial->serial_lock, flags);
1259 }
1260
1261 static void hso_unthrottle(struct tty_struct *tty)
1262 {
1263 struct hso_serial *serial = tty->driver_data;
1264
1265 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1266 }
1267
1268 static void hso_unthrottle_workfunc(struct work_struct *work)
1269 {
1270 struct hso_serial *serial =
1271 container_of(work, struct hso_serial,
1272 retry_unthrottle_workqueue);
1273 hso_unthrottle_tasklet(serial);
1274 }
1275
1276 /* open the requested serial port */
1277 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1278 {
1279 struct hso_serial *serial = get_serial_by_index(tty->index);
1280 int result;
1281
1282 /* sanity check */
1283 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1284 WARN_ON(1);
1285 tty->driver_data = NULL;
1286 D1("Failed to open port");
1287 return -ENODEV;
1288 }
1289
1290 mutex_lock(&serial->parent->mutex);
1291 result = usb_autopm_get_interface(serial->parent->interface);
1292 if (result < 0)
1293 goto err_out;
1294
1295 D1("Opening %d", serial->minor);
1296 kref_get(&serial->parent->ref);
1297
1298 /* setup */
1299 tty->driver_data = serial;
1300 tty_port_tty_set(&serial->port, tty);
1301
1302 /* check for port already opened, if not set the termios */
1303 serial->port.count++;
1304 if (serial->port.count == 1) {
1305 serial->rx_state = RX_IDLE;
1306 /* Force default termio settings */
1307 _hso_serial_set_termios(tty, NULL);
1308 tasklet_init(&serial->unthrottle_tasklet,
1309 (void (*)(unsigned long))hso_unthrottle_tasklet,
1310 (unsigned long)serial);
1311 INIT_WORK(&serial->retry_unthrottle_workqueue,
1312 hso_unthrottle_workfunc);
1313 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1314 if (result) {
1315 hso_stop_serial_device(serial->parent);
1316 serial->port.count--;
1317 kref_put(&serial->parent->ref, hso_serial_ref_free);
1318 }
1319 } else {
1320 D1("Port was already open");
1321 }
1322
1323 usb_autopm_put_interface(serial->parent->interface);
1324
1325 /* done */
1326 if (result)
1327 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1328 err_out:
1329 mutex_unlock(&serial->parent->mutex);
1330 return result;
1331 }
1332
1333 /* close the requested serial port */
1334 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1335 {
1336 struct hso_serial *serial = tty->driver_data;
1337 u8 usb_gone;
1338
1339 D1("Closing serial port");
1340
1341 /* Open failed, no close cleanup required */
1342 if (serial == NULL)
1343 return;
1344
1345 mutex_lock(&serial->parent->mutex);
1346 usb_gone = serial->parent->usb_gone;
1347
1348 if (!usb_gone)
1349 usb_autopm_get_interface(serial->parent->interface);
1350
1351 /* reset the rts and dtr */
1352 /* do the actual close */
1353 serial->port.count--;
1354
1355 if (serial->port.count <= 0) {
1356 serial->port.count = 0;
1357 tty_port_tty_set(&serial->port, NULL);
1358 if (!usb_gone)
1359 hso_stop_serial_device(serial->parent);
1360 tasklet_kill(&serial->unthrottle_tasklet);
1361 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1362 }
1363
1364 if (!usb_gone)
1365 usb_autopm_put_interface(serial->parent->interface);
1366
1367 mutex_unlock(&serial->parent->mutex);
1368
1369 kref_put(&serial->parent->ref, hso_serial_ref_free);
1370 }
1371
1372 /* close the requested serial port */
1373 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1374 int count)
1375 {
1376 struct hso_serial *serial = tty->driver_data;
1377 int space, tx_bytes;
1378 unsigned long flags;
1379
1380 /* sanity check */
1381 if (serial == NULL) {
1382 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1383 return -ENODEV;
1384 }
1385
1386 spin_lock_irqsave(&serial->serial_lock, flags);
1387
1388 space = serial->tx_data_length - serial->tx_buffer_count;
1389 tx_bytes = (count < space) ? count : space;
1390
1391 if (!tx_bytes)
1392 goto out;
1393
1394 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1395 serial->tx_buffer_count += tx_bytes;
1396
1397 out:
1398 spin_unlock_irqrestore(&serial->serial_lock, flags);
1399
1400 hso_kick_transmit(serial);
1401 /* done */
1402 return tx_bytes;
1403 }
1404
1405 /* how much room is there for writing */
1406 static int hso_serial_write_room(struct tty_struct *tty)
1407 {
1408 struct hso_serial *serial = tty->driver_data;
1409 int room;
1410 unsigned long flags;
1411
1412 spin_lock_irqsave(&serial->serial_lock, flags);
1413 room = serial->tx_data_length - serial->tx_buffer_count;
1414 spin_unlock_irqrestore(&serial->serial_lock, flags);
1415
1416 /* return free room */
1417 return room;
1418 }
1419
1420 /* setup the term */
1421 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1422 {
1423 struct hso_serial *serial = tty->driver_data;
1424 unsigned long flags;
1425
1426 if (old)
1427 D5("Termios called with: cflags new[%d] - old[%d]",
1428 tty->termios->c_cflag, old->c_cflag);
1429
1430 /* the actual setup */
1431 spin_lock_irqsave(&serial->serial_lock, flags);
1432 if (serial->port.count)
1433 _hso_serial_set_termios(tty, old);
1434 else
1435 tty->termios = old;
1436 spin_unlock_irqrestore(&serial->serial_lock, flags);
1437
1438 /* done */
1439 }
1440
1441 /* how many characters in the buffer */
1442 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1443 {
1444 struct hso_serial *serial = tty->driver_data;
1445 int chars;
1446 unsigned long flags;
1447
1448 /* sanity check */
1449 if (serial == NULL)
1450 return 0;
1451
1452 spin_lock_irqsave(&serial->serial_lock, flags);
1453 chars = serial->tx_buffer_count;
1454 spin_unlock_irqrestore(&serial->serial_lock, flags);
1455
1456 return chars;
1457 }
1458 static int tiocmget_submit_urb(struct hso_serial *serial,
1459 struct hso_tiocmget *tiocmget,
1460 struct usb_device *usb)
1461 {
1462 int result;
1463
1464 if (serial->parent->usb_gone)
1465 return -ENODEV;
1466 usb_fill_int_urb(tiocmget->urb, usb,
1467 usb_rcvintpipe(usb,
1468 tiocmget->endp->
1469 bEndpointAddress & 0x7F),
1470 &tiocmget->serial_state_notification,
1471 sizeof(struct hso_serial_state_notification),
1472 tiocmget_intr_callback, serial,
1473 tiocmget->endp->bInterval);
1474 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1475 if (result) {
1476 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1477 result);
1478 }
1479 return result;
1480
1481 }
1482
1483 static void tiocmget_intr_callback(struct urb *urb)
1484 {
1485 struct hso_serial *serial = urb->context;
1486 struct hso_tiocmget *tiocmget;
1487 int status = urb->status;
1488 u16 UART_state_bitmap, prev_UART_state_bitmap;
1489 struct uart_icount *icount;
1490 struct hso_serial_state_notification *serial_state_notification;
1491 struct usb_device *usb;
1492
1493 /* Sanity checks */
1494 if (!serial)
1495 return;
1496 if (status) {
1497 handle_usb_error(status, __func__, serial->parent);
1498 return;
1499 }
1500 tiocmget = serial->tiocmget;
1501 if (!tiocmget)
1502 return;
1503 usb = serial->parent->usb;
1504 serial_state_notification = &tiocmget->serial_state_notification;
1505 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1506 serial_state_notification->bNotification != B_NOTIFICATION ||
1507 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1508 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1509 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1510 dev_warn(&usb->dev,
1511 "hso received invalid serial state notification\n");
1512 DUMP(serial_state_notification,
1513 sizeof(struct hso_serial_state_notification));
1514 } else {
1515
1516 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1517 UART_state_bitmap);
1518 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1519 icount = &tiocmget->icount;
1520 spin_lock(&serial->serial_lock);
1521 if ((UART_state_bitmap & B_OVERRUN) !=
1522 (prev_UART_state_bitmap & B_OVERRUN))
1523 icount->parity++;
1524 if ((UART_state_bitmap & B_PARITY) !=
1525 (prev_UART_state_bitmap & B_PARITY))
1526 icount->parity++;
1527 if ((UART_state_bitmap & B_FRAMING) !=
1528 (prev_UART_state_bitmap & B_FRAMING))
1529 icount->frame++;
1530 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1531 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1532 icount->rng++;
1533 if ((UART_state_bitmap & B_BREAK) !=
1534 (prev_UART_state_bitmap & B_BREAK))
1535 icount->brk++;
1536 if ((UART_state_bitmap & B_TX_CARRIER) !=
1537 (prev_UART_state_bitmap & B_TX_CARRIER))
1538 icount->dsr++;
1539 if ((UART_state_bitmap & B_RX_CARRIER) !=
1540 (prev_UART_state_bitmap & B_RX_CARRIER))
1541 icount->dcd++;
1542 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1543 spin_unlock(&serial->serial_lock);
1544 tiocmget->intr_completed = 1;
1545 wake_up_interruptible(&tiocmget->waitq);
1546 }
1547 memset(serial_state_notification, 0,
1548 sizeof(struct hso_serial_state_notification));
1549 tiocmget_submit_urb(serial,
1550 tiocmget,
1551 serial->parent->usb);
1552 }
1553
1554 /*
1555 * next few functions largely stolen from drivers/serial/serial_core.c
1556 */
1557 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1558 * - mask passed in arg for lines of interest
1559 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1560 * Caller should use TIOCGICOUNT to see which one it was
1561 */
1562 static int
1563 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1564 {
1565 DECLARE_WAITQUEUE(wait, current);
1566 struct uart_icount cprev, cnow;
1567 struct hso_tiocmget *tiocmget;
1568 int ret;
1569
1570 tiocmget = serial->tiocmget;
1571 if (!tiocmget)
1572 return -ENOENT;
1573 /*
1574 * note the counters on entry
1575 */
1576 spin_lock_irq(&serial->serial_lock);
1577 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1578 spin_unlock_irq(&serial->serial_lock);
1579 add_wait_queue(&tiocmget->waitq, &wait);
1580 for (;;) {
1581 spin_lock_irq(&serial->serial_lock);
1582 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1583 spin_unlock_irq(&serial->serial_lock);
1584 set_current_state(TASK_INTERRUPTIBLE);
1585 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1586 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1587 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1588 ret = 0;
1589 break;
1590 }
1591 schedule();
1592 /* see if a signal did it */
1593 if (signal_pending(current)) {
1594 ret = -ERESTARTSYS;
1595 break;
1596 }
1597 cprev = cnow;
1598 }
1599 current->state = TASK_RUNNING;
1600 remove_wait_queue(&tiocmget->waitq, &wait);
1601
1602 return ret;
1603 }
1604
1605 /*
1606 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1607 * Return: write counters to the user passed counter struct
1608 * NB: both 1->0 and 0->1 transitions are counted except for
1609 * RI where only 0->1 is counted.
1610 */
1611 static int hso_get_count(struct tty_struct *tty,
1612 struct serial_icounter_struct *icount)
1613 {
1614 struct uart_icount cnow;
1615 struct hso_serial *serial = tty->driver_data;
1616 struct hso_tiocmget *tiocmget = serial->tiocmget;
1617
1618 memset(icount, 0, sizeof(struct serial_icounter_struct));
1619
1620 if (!tiocmget)
1621 return -ENOENT;
1622 spin_lock_irq(&serial->serial_lock);
1623 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1624 spin_unlock_irq(&serial->serial_lock);
1625
1626 icount->cts = cnow.cts;
1627 icount->dsr = cnow.dsr;
1628 icount->rng = cnow.rng;
1629 icount->dcd = cnow.dcd;
1630 icount->rx = cnow.rx;
1631 icount->tx = cnow.tx;
1632 icount->frame = cnow.frame;
1633 icount->overrun = cnow.overrun;
1634 icount->parity = cnow.parity;
1635 icount->brk = cnow.brk;
1636 icount->buf_overrun = cnow.buf_overrun;
1637
1638 return 0;
1639 }
1640
1641
1642 static int hso_serial_tiocmget(struct tty_struct *tty)
1643 {
1644 int retval;
1645 struct hso_serial *serial = tty->driver_data;
1646 struct hso_tiocmget *tiocmget;
1647 u16 UART_state_bitmap;
1648
1649 /* sanity check */
1650 if (!serial) {
1651 D1("no tty structures");
1652 return -EINVAL;
1653 }
1654 spin_lock_irq(&serial->serial_lock);
1655 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1656 ((serial->dtr_state) ? TIOCM_DTR : 0);
1657 tiocmget = serial->tiocmget;
1658 if (tiocmget) {
1659
1660 UART_state_bitmap = le16_to_cpu(
1661 tiocmget->prev_UART_state_bitmap);
1662 if (UART_state_bitmap & B_RING_SIGNAL)
1663 retval |= TIOCM_RNG;
1664 if (UART_state_bitmap & B_RX_CARRIER)
1665 retval |= TIOCM_CD;
1666 if (UART_state_bitmap & B_TX_CARRIER)
1667 retval |= TIOCM_DSR;
1668 }
1669 spin_unlock_irq(&serial->serial_lock);
1670 return retval;
1671 }
1672
1673 static int hso_serial_tiocmset(struct tty_struct *tty,
1674 unsigned int set, unsigned int clear)
1675 {
1676 int val = 0;
1677 unsigned long flags;
1678 int if_num;
1679 struct hso_serial *serial = tty->driver_data;
1680
1681 /* sanity check */
1682 if (!serial) {
1683 D1("no tty structures");
1684 return -EINVAL;
1685 }
1686
1687 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1688 return -EINVAL;
1689
1690 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1691
1692 spin_lock_irqsave(&serial->serial_lock, flags);
1693 if (set & TIOCM_RTS)
1694 serial->rts_state = 1;
1695 if (set & TIOCM_DTR)
1696 serial->dtr_state = 1;
1697
1698 if (clear & TIOCM_RTS)
1699 serial->rts_state = 0;
1700 if (clear & TIOCM_DTR)
1701 serial->dtr_state = 0;
1702
1703 if (serial->dtr_state)
1704 val |= 0x01;
1705 if (serial->rts_state)
1706 val |= 0x02;
1707
1708 spin_unlock_irqrestore(&serial->serial_lock, flags);
1709
1710 return usb_control_msg(serial->parent->usb,
1711 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1712 0x21, val, if_num, NULL, 0,
1713 USB_CTRL_SET_TIMEOUT);
1714 }
1715
1716 static int hso_serial_ioctl(struct tty_struct *tty,
1717 unsigned int cmd, unsigned long arg)
1718 {
1719 struct hso_serial *serial = tty->driver_data;
1720 int ret = 0;
1721 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1722
1723 if (!serial)
1724 return -ENODEV;
1725 switch (cmd) {
1726 case TIOCMIWAIT:
1727 ret = hso_wait_modem_status(serial, arg);
1728 break;
1729 default:
1730 ret = -ENOIOCTLCMD;
1731 break;
1732 }
1733 return ret;
1734 }
1735
1736
1737 /* starts a transmit */
1738 static void hso_kick_transmit(struct hso_serial *serial)
1739 {
1740 u8 *temp;
1741 unsigned long flags;
1742 int res;
1743
1744 spin_lock_irqsave(&serial->serial_lock, flags);
1745 if (!serial->tx_buffer_count)
1746 goto out;
1747
1748 if (serial->tx_urb_used)
1749 goto out;
1750
1751 /* Wakeup USB interface if necessary */
1752 if (hso_get_activity(serial->parent) == -EAGAIN)
1753 goto out;
1754
1755 /* Switch pointers around to avoid memcpy */
1756 temp = serial->tx_buffer;
1757 serial->tx_buffer = serial->tx_data;
1758 serial->tx_data = temp;
1759 serial->tx_data_count = serial->tx_buffer_count;
1760 serial->tx_buffer_count = 0;
1761
1762 /* If temp is set, it means we switched buffers */
1763 if (temp && serial->write_data) {
1764 res = serial->write_data(serial);
1765 if (res >= 0)
1766 serial->tx_urb_used = 1;
1767 }
1768 out:
1769 spin_unlock_irqrestore(&serial->serial_lock, flags);
1770 }
1771
1772 /* make a request (for reading and writing data to muxed serial port) */
1773 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1774 struct urb *ctrl_urb,
1775 struct usb_ctrlrequest *ctrl_req,
1776 u8 *ctrl_urb_data, u32 size)
1777 {
1778 int result;
1779 int pipe;
1780
1781 /* Sanity check */
1782 if (!serial || !ctrl_urb || !ctrl_req) {
1783 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1784 return -EINVAL;
1785 }
1786
1787 /* initialize */
1788 ctrl_req->wValue = 0;
1789 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1790 ctrl_req->wLength = cpu_to_le16(size);
1791
1792 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1793 /* Reading command */
1794 ctrl_req->bRequestType = USB_DIR_IN |
1795 USB_TYPE_OPTION_VENDOR |
1796 USB_RECIP_INTERFACE;
1797 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1798 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1799 } else {
1800 /* Writing command */
1801 ctrl_req->bRequestType = USB_DIR_OUT |
1802 USB_TYPE_OPTION_VENDOR |
1803 USB_RECIP_INTERFACE;
1804 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1805 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1806 }
1807 /* syslog */
1808 D2("%s command (%02x) len: %d, port: %d",
1809 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1810 ctrl_req->bRequestType, ctrl_req->wLength, port);
1811
1812 /* Load ctrl urb */
1813 ctrl_urb->transfer_flags = 0;
1814 usb_fill_control_urb(ctrl_urb,
1815 serial->parent->usb,
1816 pipe,
1817 (u8 *) ctrl_req,
1818 ctrl_urb_data, size, ctrl_callback, serial);
1819 /* Send it on merry way */
1820 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1821 if (result) {
1822 dev_err(&ctrl_urb->dev->dev,
1823 "%s failed submit ctrl_urb %d type %d\n", __func__,
1824 result, type);
1825 return result;
1826 }
1827
1828 /* done */
1829 return size;
1830 }
1831
1832 /* called by intr_callback when read occurs */
1833 static int hso_mux_serial_read(struct hso_serial *serial)
1834 {
1835 if (!serial)
1836 return -EINVAL;
1837
1838 /* clean data */
1839 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1840 /* make the request */
1841
1842 if (serial->num_rx_urbs != 1) {
1843 dev_err(&serial->parent->interface->dev,
1844 "ERROR: mux'd reads with multiple buffers "
1845 "not possible\n");
1846 return 0;
1847 }
1848 return mux_device_request(serial,
1849 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1850 serial->parent->port_spec & HSO_PORT_MASK,
1851 serial->rx_urb[0],
1852 &serial->ctrl_req_rx,
1853 serial->rx_data[0], serial->rx_data_length);
1854 }
1855
1856 /* used for muxed serial port callback (muxed serial read) */
1857 static void intr_callback(struct urb *urb)
1858 {
1859 struct hso_shared_int *shared_int = urb->context;
1860 struct hso_serial *serial;
1861 unsigned char *port_req;
1862 int status = urb->status;
1863 int i;
1864
1865 usb_mark_last_busy(urb->dev);
1866
1867 /* sanity check */
1868 if (!shared_int)
1869 return;
1870
1871 /* status check */
1872 if (status) {
1873 handle_usb_error(status, __func__, NULL);
1874 return;
1875 }
1876 D4("\n--- Got intr callback 0x%02X ---", status);
1877
1878 /* what request? */
1879 port_req = urb->transfer_buffer;
1880 D4(" port_req = 0x%.2X\n", *port_req);
1881 /* loop over all muxed ports to find the one sending this */
1882 for (i = 0; i < 8; i++) {
1883 /* max 8 channels on MUX */
1884 if (*port_req & (1 << i)) {
1885 serial = get_serial_by_shared_int_and_type(shared_int,
1886 (1 << i));
1887 if (serial != NULL) {
1888 D1("Pending read interrupt on port %d\n", i);
1889 spin_lock(&serial->serial_lock);
1890 if (serial->rx_state == RX_IDLE &&
1891 serial->port.count > 0) {
1892 /* Setup and send a ctrl req read on
1893 * port i */
1894 if (!serial->rx_urb_filled[0]) {
1895 serial->rx_state = RX_SENT;
1896 hso_mux_serial_read(serial);
1897 } else
1898 serial->rx_state = RX_PENDING;
1899 } else {
1900 D1("Already a read pending on "
1901 "port %d or port not open\n", i);
1902 }
1903 spin_unlock(&serial->serial_lock);
1904 }
1905 }
1906 }
1907 /* Resubmit interrupt urb */
1908 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1909 }
1910
1911 /* called for writing to muxed serial port */
1912 static int hso_mux_serial_write_data(struct hso_serial *serial)
1913 {
1914 if (NULL == serial)
1915 return -EINVAL;
1916
1917 return mux_device_request(serial,
1918 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1919 serial->parent->port_spec & HSO_PORT_MASK,
1920 serial->tx_urb,
1921 &serial->ctrl_req_tx,
1922 serial->tx_data, serial->tx_data_count);
1923 }
1924
1925 /* write callback for Diag and CS port */
1926 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1927 {
1928 struct hso_serial *serial = urb->context;
1929 int status = urb->status;
1930 struct tty_struct *tty;
1931
1932 /* sanity check */
1933 if (!serial) {
1934 D1("serial == NULL");
1935 return;
1936 }
1937
1938 spin_lock(&serial->serial_lock);
1939 serial->tx_urb_used = 0;
1940 spin_unlock(&serial->serial_lock);
1941 if (status) {
1942 handle_usb_error(status, __func__, serial->parent);
1943 return;
1944 }
1945 hso_put_activity(serial->parent);
1946 tty = tty_port_tty_get(&serial->port);
1947 if (tty) {
1948 tty_wakeup(tty);
1949 tty_kref_put(tty);
1950 }
1951 hso_kick_transmit(serial);
1952
1953 D1(" ");
1954 }
1955
1956 /* called for writing diag or CS serial port */
1957 static int hso_std_serial_write_data(struct hso_serial *serial)
1958 {
1959 int count = serial->tx_data_count;
1960 int result;
1961
1962 usb_fill_bulk_urb(serial->tx_urb,
1963 serial->parent->usb,
1964 usb_sndbulkpipe(serial->parent->usb,
1965 serial->out_endp->
1966 bEndpointAddress & 0x7F),
1967 serial->tx_data, serial->tx_data_count,
1968 hso_std_serial_write_bulk_callback, serial);
1969
1970 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1971 if (result) {
1972 dev_warn(&serial->parent->usb->dev,
1973 "Failed to submit urb - res %d\n", result);
1974 return result;
1975 }
1976
1977 return count;
1978 }
1979
1980 /* callback after read or write on muxed serial port */
1981 static void ctrl_callback(struct urb *urb)
1982 {
1983 struct hso_serial *serial = urb->context;
1984 struct usb_ctrlrequest *req;
1985 int status = urb->status;
1986
1987 /* sanity check */
1988 if (!serial)
1989 return;
1990
1991 spin_lock(&serial->serial_lock);
1992 serial->tx_urb_used = 0;
1993 spin_unlock(&serial->serial_lock);
1994 if (status) {
1995 handle_usb_error(status, __func__, serial->parent);
1996 return;
1997 }
1998
1999 /* what request? */
2000 req = (struct usb_ctrlrequest *)(urb->setup_packet);
2001 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2002 D4("Actual length of urb = %d\n", urb->actual_length);
2003 DUMP1(urb->transfer_buffer, urb->actual_length);
2004
2005 if (req->bRequestType ==
2006 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2007 /* response to a read command */
2008 serial->rx_urb_filled[0] = 1;
2009 spin_lock(&serial->serial_lock);
2010 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2011 spin_unlock(&serial->serial_lock);
2012 } else {
2013 struct tty_struct *tty = tty_port_tty_get(&serial->port);
2014 hso_put_activity(serial->parent);
2015 if (tty) {
2016 tty_wakeup(tty);
2017 tty_kref_put(tty);
2018 }
2019 /* response to a write command */
2020 hso_kick_transmit(serial);
2021 }
2022 }
2023
2024 /* handle RX data for serial port */
2025 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2026 {
2027 struct tty_struct *tty;
2028 int write_length_remaining = 0;
2029 int curr_write_len;
2030
2031 /* Sanity check */
2032 if (urb == NULL || serial == NULL) {
2033 D1("serial = NULL");
2034 return -2;
2035 }
2036
2037 tty = tty_port_tty_get(&serial->port);
2038
2039 /* Push data to tty */
2040 if (tty) {
2041 write_length_remaining = urb->actual_length -
2042 serial->curr_rx_urb_offset;
2043 D1("data to push to tty");
2044 while (write_length_remaining) {
2045 if (test_bit(TTY_THROTTLED, &tty->flags)) {
2046 tty_kref_put(tty);
2047 return -1;
2048 }
2049 curr_write_len = tty_insert_flip_string
2050 (tty, urb->transfer_buffer +
2051 serial->curr_rx_urb_offset,
2052 write_length_remaining);
2053 serial->curr_rx_urb_offset += curr_write_len;
2054 write_length_remaining -= curr_write_len;
2055 tty_flip_buffer_push(tty);
2056 }
2057 tty_kref_put(tty);
2058 }
2059 if (write_length_remaining == 0) {
2060 serial->curr_rx_urb_offset = 0;
2061 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2062 }
2063 return write_length_remaining;
2064 }
2065
2066
2067 /* Base driver functions */
2068
2069 static void hso_log_port(struct hso_device *hso_dev)
2070 {
2071 char *port_type;
2072 char port_dev[20];
2073
2074 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2075 case HSO_PORT_CONTROL:
2076 port_type = "Control";
2077 break;
2078 case HSO_PORT_APP:
2079 port_type = "Application";
2080 break;
2081 case HSO_PORT_GPS:
2082 port_type = "GPS";
2083 break;
2084 case HSO_PORT_GPS_CONTROL:
2085 port_type = "GPS control";
2086 break;
2087 case HSO_PORT_APP2:
2088 port_type = "Application2";
2089 break;
2090 case HSO_PORT_PCSC:
2091 port_type = "PCSC";
2092 break;
2093 case HSO_PORT_DIAG:
2094 port_type = "Diagnostic";
2095 break;
2096 case HSO_PORT_DIAG2:
2097 port_type = "Diagnostic2";
2098 break;
2099 case HSO_PORT_MODEM:
2100 port_type = "Modem";
2101 break;
2102 case HSO_PORT_NETWORK:
2103 port_type = "Network";
2104 break;
2105 default:
2106 port_type = "Unknown";
2107 break;
2108 }
2109 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2110 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2111 } else
2112 sprintf(port_dev, "/dev/%s%d", tty_filename,
2113 dev2ser(hso_dev)->minor);
2114
2115 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2116 port_type, port_dev);
2117 }
2118
2119 static int hso_start_net_device(struct hso_device *hso_dev)
2120 {
2121 int i, result = 0;
2122 struct hso_net *hso_net = dev2net(hso_dev);
2123
2124 if (!hso_net)
2125 return -ENODEV;
2126
2127 /* send URBs for all read buffers */
2128 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2129
2130 /* Prep a receive URB */
2131 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2132 hso_dev->usb,
2133 usb_rcvbulkpipe(hso_dev->usb,
2134 hso_net->in_endp->
2135 bEndpointAddress & 0x7F),
2136 hso_net->mux_bulk_rx_buf_pool[i],
2137 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2138 hso_net);
2139
2140 /* Put it out there so the device can send us stuff */
2141 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2142 GFP_NOIO);
2143 if (result)
2144 dev_warn(&hso_dev->usb->dev,
2145 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2146 i, result);
2147 }
2148
2149 return result;
2150 }
2151
2152 static int hso_stop_net_device(struct hso_device *hso_dev)
2153 {
2154 int i;
2155 struct hso_net *hso_net = dev2net(hso_dev);
2156
2157 if (!hso_net)
2158 return -ENODEV;
2159
2160 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2161 if (hso_net->mux_bulk_rx_urb_pool[i])
2162 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2163
2164 }
2165 if (hso_net->mux_bulk_tx_urb)
2166 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2167
2168 return 0;
2169 }
2170
2171 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2172 {
2173 int i, result = 0;
2174 struct hso_serial *serial = dev2ser(hso_dev);
2175
2176 if (!serial)
2177 return -ENODEV;
2178
2179 /* If it is not the MUX port fill in and submit a bulk urb (already
2180 * allocated in hso_serial_start) */
2181 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2182 for (i = 0; i < serial->num_rx_urbs; i++) {
2183 usb_fill_bulk_urb(serial->rx_urb[i],
2184 serial->parent->usb,
2185 usb_rcvbulkpipe(serial->parent->usb,
2186 serial->in_endp->
2187 bEndpointAddress &
2188 0x7F),
2189 serial->rx_data[i],
2190 serial->rx_data_length,
2191 hso_std_serial_read_bulk_callback,
2192 serial);
2193 result = usb_submit_urb(serial->rx_urb[i], flags);
2194 if (result) {
2195 dev_warn(&serial->parent->usb->dev,
2196 "Failed to submit urb - res %d\n",
2197 result);
2198 break;
2199 }
2200 }
2201 } else {
2202 mutex_lock(&serial->shared_int->shared_int_lock);
2203 if (!serial->shared_int->use_count) {
2204 result =
2205 hso_mux_submit_intr_urb(serial->shared_int,
2206 hso_dev->usb, flags);
2207 }
2208 serial->shared_int->use_count++;
2209 mutex_unlock(&serial->shared_int->shared_int_lock);
2210 }
2211 if (serial->tiocmget)
2212 tiocmget_submit_urb(serial,
2213 serial->tiocmget,
2214 serial->parent->usb);
2215 return result;
2216 }
2217
2218 static int hso_stop_serial_device(struct hso_device *hso_dev)
2219 {
2220 int i;
2221 struct hso_serial *serial = dev2ser(hso_dev);
2222 struct hso_tiocmget *tiocmget;
2223
2224 if (!serial)
2225 return -ENODEV;
2226
2227 for (i = 0; i < serial->num_rx_urbs; i++) {
2228 if (serial->rx_urb[i]) {
2229 usb_kill_urb(serial->rx_urb[i]);
2230 serial->rx_urb_filled[i] = 0;
2231 }
2232 }
2233 serial->curr_rx_urb_idx = 0;
2234 serial->curr_rx_urb_offset = 0;
2235
2236 if (serial->tx_urb)
2237 usb_kill_urb(serial->tx_urb);
2238
2239 if (serial->shared_int) {
2240 mutex_lock(&serial->shared_int->shared_int_lock);
2241 if (serial->shared_int->use_count &&
2242 (--serial->shared_int->use_count == 0)) {
2243 struct urb *urb;
2244
2245 urb = serial->shared_int->shared_intr_urb;
2246 if (urb)
2247 usb_kill_urb(urb);
2248 }
2249 mutex_unlock(&serial->shared_int->shared_int_lock);
2250 }
2251 tiocmget = serial->tiocmget;
2252 if (tiocmget) {
2253 wake_up_interruptible(&tiocmget->waitq);
2254 usb_kill_urb(tiocmget->urb);
2255 }
2256
2257 return 0;
2258 }
2259
2260 static void hso_serial_common_free(struct hso_serial *serial)
2261 {
2262 int i;
2263
2264 if (serial->parent->dev)
2265 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2266
2267 tty_unregister_device(tty_drv, serial->minor);
2268
2269 for (i = 0; i < serial->num_rx_urbs; i++) {
2270 /* unlink and free RX URB */
2271 usb_free_urb(serial->rx_urb[i]);
2272 /* free the RX buffer */
2273 kfree(serial->rx_data[i]);
2274 }
2275
2276 /* unlink and free TX URB */
2277 usb_free_urb(serial->tx_urb);
2278 kfree(serial->tx_data);
2279 }
2280
2281 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2282 int rx_size, int tx_size)
2283 {
2284 struct device *dev;
2285 int minor;
2286 int i;
2287
2288 minor = get_free_serial_index();
2289 if (minor < 0)
2290 goto exit;
2291
2292 /* register our minor number */
2293 serial->parent->dev = tty_register_device(tty_drv, minor,
2294 &serial->parent->interface->dev);
2295 dev = serial->parent->dev;
2296 dev_set_drvdata(dev, serial->parent);
2297 i = device_create_file(dev, &dev_attr_hsotype);
2298
2299 /* fill in specific data for later use */
2300 serial->minor = minor;
2301 serial->magic = HSO_SERIAL_MAGIC;
2302 spin_lock_init(&serial->serial_lock);
2303 tty_port_init(&serial->port);
2304 serial->num_rx_urbs = num_urbs;
2305
2306 /* RX, allocate urb and initialize */
2307
2308 /* prepare our RX buffer */
2309 serial->rx_data_length = rx_size;
2310 for (i = 0; i < serial->num_rx_urbs; i++) {
2311 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2312 if (!serial->rx_urb[i]) {
2313 dev_err(dev, "Could not allocate urb?\n");
2314 goto exit;
2315 }
2316 serial->rx_urb[i]->transfer_buffer = NULL;
2317 serial->rx_urb[i]->transfer_buffer_length = 0;
2318 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2319 GFP_KERNEL);
2320 if (!serial->rx_data[i]) {
2321 dev_err(dev, "%s - Out of memory\n", __func__);
2322 goto exit;
2323 }
2324 }
2325
2326 /* TX, allocate urb and initialize */
2327 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2328 if (!serial->tx_urb) {
2329 dev_err(dev, "Could not allocate urb?\n");
2330 goto exit;
2331 }
2332 serial->tx_urb->transfer_buffer = NULL;
2333 serial->tx_urb->transfer_buffer_length = 0;
2334 /* prepare our TX buffer */
2335 serial->tx_data_count = 0;
2336 serial->tx_buffer_count = 0;
2337 serial->tx_data_length = tx_size;
2338 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2339 if (!serial->tx_data) {
2340 dev_err(dev, "%s - Out of memory\n", __func__);
2341 goto exit;
2342 }
2343 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2344 if (!serial->tx_buffer) {
2345 dev_err(dev, "%s - Out of memory\n", __func__);
2346 goto exit;
2347 }
2348
2349 return 0;
2350 exit:
2351 hso_serial_common_free(serial);
2352 return -1;
2353 }
2354
2355 /* Creates a general hso device */
2356 static struct hso_device *hso_create_device(struct usb_interface *intf,
2357 int port_spec)
2358 {
2359 struct hso_device *hso_dev;
2360
2361 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2362 if (!hso_dev)
2363 return NULL;
2364
2365 hso_dev->port_spec = port_spec;
2366 hso_dev->usb = interface_to_usbdev(intf);
2367 hso_dev->interface = intf;
2368 kref_init(&hso_dev->ref);
2369 mutex_init(&hso_dev->mutex);
2370
2371 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2372 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2373 INIT_WORK(&hso_dev->reset_device, reset_device);
2374
2375 return hso_dev;
2376 }
2377
2378 /* Removes a network device in the network device table */
2379 static int remove_net_device(struct hso_device *hso_dev)
2380 {
2381 int i;
2382
2383 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2384 if (network_table[i] == hso_dev) {
2385 network_table[i] = NULL;
2386 break;
2387 }
2388 }
2389 if (i == HSO_MAX_NET_DEVICES)
2390 return -1;
2391 return 0;
2392 }
2393
2394 /* Frees our network device */
2395 static void hso_free_net_device(struct hso_device *hso_dev)
2396 {
2397 int i;
2398 struct hso_net *hso_net = dev2net(hso_dev);
2399
2400 if (!hso_net)
2401 return;
2402
2403 remove_net_device(hso_net->parent);
2404
2405 if (hso_net->net)
2406 unregister_netdev(hso_net->net);
2407
2408 /* start freeing */
2409 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2410 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2411 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2412 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2413 }
2414 usb_free_urb(hso_net->mux_bulk_tx_urb);
2415 kfree(hso_net->mux_bulk_tx_buf);
2416 hso_net->mux_bulk_tx_buf = NULL;
2417
2418 if (hso_net->net)
2419 free_netdev(hso_net->net);
2420
2421 kfree(hso_dev);
2422 }
2423
2424 static const struct net_device_ops hso_netdev_ops = {
2425 .ndo_open = hso_net_open,
2426 .ndo_stop = hso_net_close,
2427 .ndo_start_xmit = hso_net_start_xmit,
2428 .ndo_tx_timeout = hso_net_tx_timeout,
2429 };
2430
2431 /* initialize the network interface */
2432 static void hso_net_init(struct net_device *net)
2433 {
2434 struct hso_net *hso_net = netdev_priv(net);
2435
2436 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2437
2438 /* fill in the other fields */
2439 net->netdev_ops = &hso_netdev_ops;
2440 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2441 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2442 net->type = ARPHRD_NONE;
2443 net->mtu = DEFAULT_MTU - 14;
2444 net->tx_queue_len = 10;
2445 SET_ETHTOOL_OPS(net, &ops);
2446
2447 /* and initialize the semaphore */
2448 spin_lock_init(&hso_net->net_lock);
2449 }
2450
2451 /* Adds a network device in the network device table */
2452 static int add_net_device(struct hso_device *hso_dev)
2453 {
2454 int i;
2455
2456 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2457 if (network_table[i] == NULL) {
2458 network_table[i] = hso_dev;
2459 break;
2460 }
2461 }
2462 if (i == HSO_MAX_NET_DEVICES)
2463 return -1;
2464 return 0;
2465 }
2466
2467 static int hso_rfkill_set_block(void *data, bool blocked)
2468 {
2469 struct hso_device *hso_dev = data;
2470 int enabled = !blocked;
2471 int rv;
2472
2473 mutex_lock(&hso_dev->mutex);
2474 if (hso_dev->usb_gone)
2475 rv = 0;
2476 else
2477 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2478 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2479 USB_CTRL_SET_TIMEOUT);
2480 mutex_unlock(&hso_dev->mutex);
2481 return rv;
2482 }
2483
2484 static const struct rfkill_ops hso_rfkill_ops = {
2485 .set_block = hso_rfkill_set_block,
2486 };
2487
2488 /* Creates and sets up everything for rfkill */
2489 static void hso_create_rfkill(struct hso_device *hso_dev,
2490 struct usb_interface *interface)
2491 {
2492 struct hso_net *hso_net = dev2net(hso_dev);
2493 struct device *dev = &hso_net->net->dev;
2494 char *rfkn;
2495
2496 rfkn = kzalloc(20, GFP_KERNEL);
2497 if (!rfkn)
2498 dev_err(dev, "%s - Out of memory\n", __func__);
2499
2500 snprintf(rfkn, 20, "hso-%d",
2501 interface->altsetting->desc.bInterfaceNumber);
2502
2503 hso_net->rfkill = rfkill_alloc(rfkn,
2504 &interface_to_usbdev(interface)->dev,
2505 RFKILL_TYPE_WWAN,
2506 &hso_rfkill_ops, hso_dev);
2507 if (!hso_net->rfkill) {
2508 dev_err(dev, "%s - Out of memory\n", __func__);
2509 kfree(rfkn);
2510 return;
2511 }
2512 if (rfkill_register(hso_net->rfkill) < 0) {
2513 rfkill_destroy(hso_net->rfkill);
2514 kfree(rfkn);
2515 hso_net->rfkill = NULL;
2516 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2517 return;
2518 }
2519 }
2520
2521 static struct device_type hso_type = {
2522 .name = "wwan",
2523 };
2524
2525 /* Creates our network device */
2526 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2527 int port_spec)
2528 {
2529 int result, i;
2530 struct net_device *net;
2531 struct hso_net *hso_net;
2532 struct hso_device *hso_dev;
2533
2534 hso_dev = hso_create_device(interface, port_spec);
2535 if (!hso_dev)
2536 return NULL;
2537
2538 /* allocate our network device, then we can put in our private data */
2539 /* call hso_net_init to do the basic initialization */
2540 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2541 if (!net) {
2542 dev_err(&interface->dev, "Unable to create ethernet device\n");
2543 goto exit;
2544 }
2545
2546 hso_net = netdev_priv(net);
2547
2548 hso_dev->port_data.dev_net = hso_net;
2549 hso_net->net = net;
2550 hso_net->parent = hso_dev;
2551
2552 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2553 USB_DIR_IN);
2554 if (!hso_net->in_endp) {
2555 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2556 goto exit;
2557 }
2558 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2559 USB_DIR_OUT);
2560 if (!hso_net->out_endp) {
2561 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2562 goto exit;
2563 }
2564 SET_NETDEV_DEV(net, &interface->dev);
2565 SET_NETDEV_DEVTYPE(net, &hso_type);
2566
2567 /* registering our net device */
2568 result = register_netdev(net);
2569 if (result) {
2570 dev_err(&interface->dev, "Failed to register device\n");
2571 goto exit;
2572 }
2573
2574 /* start allocating */
2575 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2576 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2577 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2578 dev_err(&interface->dev, "Could not allocate rx urb\n");
2579 goto exit;
2580 }
2581 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2582 GFP_KERNEL);
2583 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2584 dev_err(&interface->dev, "Could not allocate rx buf\n");
2585 goto exit;
2586 }
2587 }
2588 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2589 if (!hso_net->mux_bulk_tx_urb) {
2590 dev_err(&interface->dev, "Could not allocate tx urb\n");
2591 goto exit;
2592 }
2593 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2594 if (!hso_net->mux_bulk_tx_buf) {
2595 dev_err(&interface->dev, "Could not allocate tx buf\n");
2596 goto exit;
2597 }
2598
2599 add_net_device(hso_dev);
2600
2601 hso_log_port(hso_dev);
2602
2603 hso_create_rfkill(hso_dev, interface);
2604
2605 return hso_dev;
2606 exit:
2607 hso_free_net_device(hso_dev);
2608 return NULL;
2609 }
2610
2611 static void hso_free_tiomget(struct hso_serial *serial)
2612 {
2613 struct hso_tiocmget *tiocmget;
2614 if (!serial)
2615 return;
2616 tiocmget = serial->tiocmget;
2617 if (tiocmget) {
2618 usb_free_urb(tiocmget->urb);
2619 tiocmget->urb = NULL;
2620 serial->tiocmget = NULL;
2621 kfree(tiocmget);
2622 }
2623 }
2624
2625 /* Frees an AT channel ( goes for both mux and non-mux ) */
2626 static void hso_free_serial_device(struct hso_device *hso_dev)
2627 {
2628 struct hso_serial *serial = dev2ser(hso_dev);
2629
2630 if (!serial)
2631 return;
2632 set_serial_by_index(serial->minor, NULL);
2633
2634 hso_serial_common_free(serial);
2635
2636 if (serial->shared_int) {
2637 mutex_lock(&serial->shared_int->shared_int_lock);
2638 if (--serial->shared_int->ref_count == 0)
2639 hso_free_shared_int(serial->shared_int);
2640 else
2641 mutex_unlock(&serial->shared_int->shared_int_lock);
2642 }
2643 hso_free_tiomget(serial);
2644 kfree(serial);
2645 kfree(hso_dev);
2646 }
2647
2648 /* Creates a bulk AT channel */
2649 static struct hso_device *hso_create_bulk_serial_device(
2650 struct usb_interface *interface, int port)
2651 {
2652 struct hso_device *hso_dev;
2653 struct hso_serial *serial;
2654 int num_urbs;
2655 struct hso_tiocmget *tiocmget;
2656
2657 hso_dev = hso_create_device(interface, port);
2658 if (!hso_dev)
2659 return NULL;
2660
2661 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2662 if (!serial)
2663 goto exit;
2664
2665 serial->parent = hso_dev;
2666 hso_dev->port_data.dev_serial = serial;
2667
2668 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2669 num_urbs = 2;
2670 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2671 GFP_KERNEL);
2672 /* it isn't going to break our heart if serial->tiocmget
2673 * allocation fails don't bother checking this.
2674 */
2675 if (serial->tiocmget) {
2676 tiocmget = serial->tiocmget;
2677 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2678 if (tiocmget->urb) {
2679 mutex_init(&tiocmget->mutex);
2680 init_waitqueue_head(&tiocmget->waitq);
2681 tiocmget->endp = hso_get_ep(
2682 interface,
2683 USB_ENDPOINT_XFER_INT,
2684 USB_DIR_IN);
2685 } else
2686 hso_free_tiomget(serial);
2687 }
2688 }
2689 else
2690 num_urbs = 1;
2691
2692 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2693 BULK_URB_TX_SIZE))
2694 goto exit;
2695
2696 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2697 USB_DIR_IN);
2698 if (!serial->in_endp) {
2699 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2700 goto exit2;
2701 }
2702
2703 if (!
2704 (serial->out_endp =
2705 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2706 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2707 goto exit2;
2708 }
2709
2710 serial->write_data = hso_std_serial_write_data;
2711
2712 /* and record this serial */
2713 set_serial_by_index(serial->minor, serial);
2714
2715 /* setup the proc dirs and files if needed */
2716 hso_log_port(hso_dev);
2717
2718 /* done, return it */
2719 return hso_dev;
2720
2721 exit2:
2722 hso_serial_common_free(serial);
2723 exit:
2724 hso_free_tiomget(serial);
2725 kfree(serial);
2726 kfree(hso_dev);
2727 return NULL;
2728 }
2729
2730 /* Creates a multiplexed AT channel */
2731 static
2732 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2733 int port,
2734 struct hso_shared_int *mux)
2735 {
2736 struct hso_device *hso_dev;
2737 struct hso_serial *serial;
2738 int port_spec;
2739
2740 port_spec = HSO_INTF_MUX;
2741 port_spec &= ~HSO_PORT_MASK;
2742
2743 port_spec |= hso_mux_to_port(port);
2744 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2745 return NULL;
2746
2747 hso_dev = hso_create_device(interface, port_spec);
2748 if (!hso_dev)
2749 return NULL;
2750
2751 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2752 if (!serial)
2753 goto exit;
2754
2755 hso_dev->port_data.dev_serial = serial;
2756 serial->parent = hso_dev;
2757
2758 if (hso_serial_common_create
2759 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2760 goto exit;
2761
2762 serial->tx_data_length--;
2763 serial->write_data = hso_mux_serial_write_data;
2764
2765 serial->shared_int = mux;
2766 mutex_lock(&serial->shared_int->shared_int_lock);
2767 serial->shared_int->ref_count++;
2768 mutex_unlock(&serial->shared_int->shared_int_lock);
2769
2770 /* and record this serial */
2771 set_serial_by_index(serial->minor, serial);
2772
2773 /* setup the proc dirs and files if needed */
2774 hso_log_port(hso_dev);
2775
2776 /* done, return it */
2777 return hso_dev;
2778
2779 exit:
2780 if (serial) {
2781 tty_unregister_device(tty_drv, serial->minor);
2782 kfree(serial);
2783 }
2784 if (hso_dev)
2785 kfree(hso_dev);
2786 return NULL;
2787
2788 }
2789
2790 static void hso_free_shared_int(struct hso_shared_int *mux)
2791 {
2792 usb_free_urb(mux->shared_intr_urb);
2793 kfree(mux->shared_intr_buf);
2794 mutex_unlock(&mux->shared_int_lock);
2795 kfree(mux);
2796 }
2797
2798 static
2799 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2800 {
2801 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2802
2803 if (!mux)
2804 return NULL;
2805
2806 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2807 USB_DIR_IN);
2808 if (!mux->intr_endp) {
2809 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2810 goto exit;
2811 }
2812
2813 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2814 if (!mux->shared_intr_urb) {
2815 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2816 goto exit;
2817 }
2818 mux->shared_intr_buf =
2819 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2820 GFP_KERNEL);
2821 if (!mux->shared_intr_buf) {
2822 dev_err(&interface->dev, "Could not allocate intr buf?\n");
2823 goto exit;
2824 }
2825
2826 mutex_init(&mux->shared_int_lock);
2827
2828 return mux;
2829
2830 exit:
2831 kfree(mux->shared_intr_buf);
2832 usb_free_urb(mux->shared_intr_urb);
2833 kfree(mux);
2834 return NULL;
2835 }
2836
2837 /* Gets the port spec for a certain interface */
2838 static int hso_get_config_data(struct usb_interface *interface)
2839 {
2840 struct usb_device *usbdev = interface_to_usbdev(interface);
2841 u8 config_data[17];
2842 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2843 s32 result;
2844
2845 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2846 0x86, 0xC0, 0, 0, config_data, 17,
2847 USB_CTRL_SET_TIMEOUT) != 0x11) {
2848 return -EIO;
2849 }
2850
2851 switch (config_data[if_num]) {
2852 case 0x0:
2853 result = 0;
2854 break;
2855 case 0x1:
2856 result = HSO_PORT_DIAG;
2857 break;
2858 case 0x2:
2859 result = HSO_PORT_GPS;
2860 break;
2861 case 0x3:
2862 result = HSO_PORT_GPS_CONTROL;
2863 break;
2864 case 0x4:
2865 result = HSO_PORT_APP;
2866 break;
2867 case 0x5:
2868 result = HSO_PORT_APP2;
2869 break;
2870 case 0x6:
2871 result = HSO_PORT_CONTROL;
2872 break;
2873 case 0x7:
2874 result = HSO_PORT_NETWORK;
2875 break;
2876 case 0x8:
2877 result = HSO_PORT_MODEM;
2878 break;
2879 case 0x9:
2880 result = HSO_PORT_MSD;
2881 break;
2882 case 0xa:
2883 result = HSO_PORT_PCSC;
2884 break;
2885 case 0xb:
2886 result = HSO_PORT_VOICE;
2887 break;
2888 default:
2889 result = 0;
2890 }
2891
2892 if (result)
2893 result |= HSO_INTF_BULK;
2894
2895 if (config_data[16] & 0x1)
2896 result |= HSO_INFO_CRC_BUG;
2897
2898 return result;
2899 }
2900
2901 /* called once for each interface upon device insertion */
2902 static int hso_probe(struct usb_interface *interface,
2903 const struct usb_device_id *id)
2904 {
2905 int mux, i, if_num, port_spec;
2906 unsigned char port_mask;
2907 struct hso_device *hso_dev = NULL;
2908 struct hso_shared_int *shared_int;
2909 struct hso_device *tmp_dev = NULL;
2910
2911 if_num = interface->altsetting->desc.bInterfaceNumber;
2912
2913 /* Get the interface/port specification from either driver_info or from
2914 * the device itself */
2915 if (id->driver_info)
2916 port_spec = ((u32 *)(id->driver_info))[if_num];
2917 else
2918 port_spec = hso_get_config_data(interface);
2919
2920 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2921 dev_err(&interface->dev, "Not our interface\n");
2922 return -ENODEV;
2923 }
2924 /* Check if we need to switch to alt interfaces prior to port
2925 * configuration */
2926 if (interface->num_altsetting > 1)
2927 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2928 interface->needs_remote_wakeup = 1;
2929
2930 /* Allocate new hso device(s) */
2931 switch (port_spec & HSO_INTF_MASK) {
2932 case HSO_INTF_MUX:
2933 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2934 /* Create the network device */
2935 if (!disable_net) {
2936 hso_dev = hso_create_net_device(interface,
2937 port_spec);
2938 if (!hso_dev)
2939 goto exit;
2940 tmp_dev = hso_dev;
2941 }
2942 }
2943
2944 if (hso_get_mux_ports(interface, &port_mask))
2945 /* TODO: de-allocate everything */
2946 goto exit;
2947
2948 shared_int = hso_create_shared_int(interface);
2949 if (!shared_int)
2950 goto exit;
2951
2952 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2953 if (port_mask & i) {
2954 hso_dev = hso_create_mux_serial_device(
2955 interface, i, shared_int);
2956 if (!hso_dev)
2957 goto exit;
2958 }
2959 }
2960
2961 if (tmp_dev)
2962 hso_dev = tmp_dev;
2963 break;
2964
2965 case HSO_INTF_BULK:
2966 /* It's a regular bulk interface */
2967 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2968 if (!disable_net)
2969 hso_dev =
2970 hso_create_net_device(interface, port_spec);
2971 } else {
2972 hso_dev =
2973 hso_create_bulk_serial_device(interface, port_spec);
2974 }
2975 if (!hso_dev)
2976 goto exit;
2977 break;
2978 default:
2979 goto exit;
2980 }
2981
2982 /* save our data pointer in this device */
2983 usb_set_intfdata(interface, hso_dev);
2984
2985 /* done */
2986 return 0;
2987 exit:
2988 hso_free_interface(interface);
2989 return -ENODEV;
2990 }
2991
2992 /* device removed, cleaning up */
2993 static void hso_disconnect(struct usb_interface *interface)
2994 {
2995 hso_free_interface(interface);
2996
2997 /* remove reference of our private data */
2998 usb_set_intfdata(interface, NULL);
2999 }
3000
3001 static void async_get_intf(struct work_struct *data)
3002 {
3003 struct hso_device *hso_dev =
3004 container_of(data, struct hso_device, async_get_intf);
3005 usb_autopm_get_interface(hso_dev->interface);
3006 }
3007
3008 static void async_put_intf(struct work_struct *data)
3009 {
3010 struct hso_device *hso_dev =
3011 container_of(data, struct hso_device, async_put_intf);
3012 usb_autopm_put_interface(hso_dev->interface);
3013 }
3014
3015 static int hso_get_activity(struct hso_device *hso_dev)
3016 {
3017 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3018 if (!hso_dev->is_active) {
3019 hso_dev->is_active = 1;
3020 schedule_work(&hso_dev->async_get_intf);
3021 }
3022 }
3023
3024 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3025 return -EAGAIN;
3026
3027 usb_mark_last_busy(hso_dev->usb);
3028
3029 return 0;
3030 }
3031
3032 static int hso_put_activity(struct hso_device *hso_dev)
3033 {
3034 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3035 if (hso_dev->is_active) {
3036 hso_dev->is_active = 0;
3037 schedule_work(&hso_dev->async_put_intf);
3038 return -EAGAIN;
3039 }
3040 }
3041 hso_dev->is_active = 0;
3042 return 0;
3043 }
3044
3045 /* called by kernel when we need to suspend device */
3046 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3047 {
3048 int i, result;
3049
3050 /* Stop all serial ports */
3051 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3052 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3053 result = hso_stop_serial_device(serial_table[i]);
3054 if (result)
3055 goto out;
3056 }
3057 }
3058
3059 /* Stop all network ports */
3060 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3061 if (network_table[i] &&
3062 (network_table[i]->interface == iface)) {
3063 result = hso_stop_net_device(network_table[i]);
3064 if (result)
3065 goto out;
3066 }
3067 }
3068
3069 out:
3070 return 0;
3071 }
3072
3073 /* called by kernel when we need to resume device */
3074 static int hso_resume(struct usb_interface *iface)
3075 {
3076 int i, result = 0;
3077 struct hso_net *hso_net;
3078
3079 /* Start all serial ports */
3080 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3081 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3082 if (dev2ser(serial_table[i])->port.count) {
3083 result =
3084 hso_start_serial_device(serial_table[i], GFP_NOIO);
3085 hso_kick_transmit(dev2ser(serial_table[i]));
3086 if (result)
3087 goto out;
3088 }
3089 }
3090 }
3091
3092 /* Start all network ports */
3093 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3094 if (network_table[i] &&
3095 (network_table[i]->interface == iface)) {
3096 hso_net = dev2net(network_table[i]);
3097 if (hso_net->flags & IFF_UP) {
3098 /* First transmit any lingering data,
3099 then restart the device. */
3100 if (hso_net->skb_tx_buf) {
3101 dev_dbg(&iface->dev,
3102 "Transmitting"
3103 " lingering data\n");
3104 hso_net_start_xmit(hso_net->skb_tx_buf,
3105 hso_net->net);
3106 hso_net->skb_tx_buf = NULL;
3107 }
3108 result = hso_start_net_device(network_table[i]);
3109 if (result)
3110 goto out;
3111 }
3112 }
3113 }
3114
3115 out:
3116 return result;
3117 }
3118
3119 static void reset_device(struct work_struct *data)
3120 {
3121 struct hso_device *hso_dev =
3122 container_of(data, struct hso_device, reset_device);
3123 struct usb_device *usb = hso_dev->usb;
3124 int result;
3125
3126 if (hso_dev->usb_gone) {
3127 D1("No reset during disconnect\n");
3128 } else {
3129 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3130 if (result < 0)
3131 D1("unable to lock device for reset: %d\n", result);
3132 else {
3133 usb_reset_device(usb);
3134 usb_unlock_device(usb);
3135 }
3136 }
3137 }
3138
3139 static void hso_serial_ref_free(struct kref *ref)
3140 {
3141 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3142
3143 hso_free_serial_device(hso_dev);
3144 }
3145
3146 static void hso_free_interface(struct usb_interface *interface)
3147 {
3148 struct hso_serial *hso_dev;
3149 struct tty_struct *tty;
3150 int i;
3151
3152 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3153 if (serial_table[i] &&
3154 (serial_table[i]->interface == interface)) {
3155 hso_dev = dev2ser(serial_table[i]);
3156 tty = tty_port_tty_get(&hso_dev->port);
3157 if (tty) {
3158 tty_hangup(tty);
3159 tty_kref_put(tty);
3160 }
3161 mutex_lock(&hso_dev->parent->mutex);
3162 hso_dev->parent->usb_gone = 1;
3163 mutex_unlock(&hso_dev->parent->mutex);
3164 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3165 }
3166 }
3167
3168 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3169 if (network_table[i] &&
3170 (network_table[i]->interface == interface)) {
3171 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3172 /* hso_stop_net_device doesn't stop the net queue since
3173 * traffic needs to start it again when suspended */
3174 netif_stop_queue(dev2net(network_table[i])->net);
3175 hso_stop_net_device(network_table[i]);
3176 cancel_work_sync(&network_table[i]->async_put_intf);
3177 cancel_work_sync(&network_table[i]->async_get_intf);
3178 if (rfk) {
3179 rfkill_unregister(rfk);
3180 rfkill_destroy(rfk);
3181 }
3182 hso_free_net_device(network_table[i]);
3183 }
3184 }
3185 }
3186
3187 /* Helper functions */
3188
3189 /* Get the endpoint ! */
3190 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3191 int type, int dir)
3192 {
3193 int i;
3194 struct usb_host_interface *iface = intf->cur_altsetting;
3195 struct usb_endpoint_descriptor *endp;
3196
3197 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3198 endp = &iface->endpoint[i].desc;
3199 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3200 (usb_endpoint_type(endp) == type))
3201 return endp;
3202 }
3203
3204 return NULL;
3205 }
3206
3207 /* Get the byte that describes which ports are enabled */
3208 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3209 {
3210 int i;
3211 struct usb_host_interface *iface = intf->cur_altsetting;
3212
3213 if (iface->extralen == 3) {
3214 *ports = iface->extra[2];
3215 return 0;
3216 }
3217
3218 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3219 if (iface->endpoint[i].extralen == 3) {
3220 *ports = iface->endpoint[i].extra[2];
3221 return 0;
3222 }
3223 }
3224
3225 return -1;
3226 }
3227
3228 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3229 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3230 struct usb_device *usb, gfp_t gfp)
3231 {
3232 int result;
3233
3234 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3235 usb_rcvintpipe(usb,
3236 shared_int->intr_endp->bEndpointAddress & 0x7F),
3237 shared_int->shared_intr_buf,
3238 1,
3239 intr_callback, shared_int,
3240 shared_int->intr_endp->bInterval);
3241
3242 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3243 if (result)
3244 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3245 result);
3246
3247 return result;
3248 }
3249
3250 /* operations setup of the serial interface */
3251 static const struct tty_operations hso_serial_ops = {
3252 .open = hso_serial_open,
3253 .close = hso_serial_close,
3254 .write = hso_serial_write,
3255 .write_room = hso_serial_write_room,
3256 .ioctl = hso_serial_ioctl,
3257 .set_termios = hso_serial_set_termios,
3258 .chars_in_buffer = hso_serial_chars_in_buffer,
3259 .tiocmget = hso_serial_tiocmget,
3260 .tiocmset = hso_serial_tiocmset,
3261 .get_icount = hso_get_count,
3262 .unthrottle = hso_unthrottle
3263 };
3264
3265 static struct usb_driver hso_driver = {
3266 .name = driver_name,
3267 .probe = hso_probe,
3268 .disconnect = hso_disconnect,
3269 .id_table = hso_ids,
3270 .suspend = hso_suspend,
3271 .resume = hso_resume,
3272 .reset_resume = hso_resume,
3273 .supports_autosuspend = 1,
3274 .disable_hub_initiated_lpm = 1,
3275 };
3276
3277 static int __init hso_init(void)
3278 {
3279 int i;
3280 int result;
3281
3282 /* put it in the log */
3283 printk(KERN_INFO "hso: %s\n", version);
3284
3285 /* Initialise the serial table semaphore and table */
3286 spin_lock_init(&serial_table_lock);
3287 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3288 serial_table[i] = NULL;
3289
3290 /* allocate our driver using the proper amount of supported minors */
3291 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3292 if (!tty_drv)
3293 return -ENOMEM;
3294
3295 /* fill in all needed values */
3296 tty_drv->driver_name = driver_name;
3297 tty_drv->name = tty_filename;
3298
3299 /* if major number is provided as parameter, use that one */
3300 if (tty_major)
3301 tty_drv->major = tty_major;
3302
3303 tty_drv->minor_start = 0;
3304 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3305 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3306 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3307 tty_drv->init_termios = tty_std_termios;
3308 hso_init_termios(&tty_drv->init_termios);
3309 tty_set_operations(tty_drv, &hso_serial_ops);
3310
3311 /* register the tty driver */
3312 result = tty_register_driver(tty_drv);
3313 if (result) {
3314 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3315 __func__, result);
3316 goto err_free_tty;
3317 }
3318
3319 /* register this module as an usb driver */
3320 result = usb_register(&hso_driver);
3321 if (result) {
3322 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3323 result);
3324 goto err_unreg_tty;
3325 }
3326
3327 /* done */
3328 return 0;
3329 err_unreg_tty:
3330 tty_unregister_driver(tty_drv);
3331 err_free_tty:
3332 put_tty_driver(tty_drv);
3333 return result;
3334 }
3335
3336 static void __exit hso_exit(void)
3337 {
3338 printk(KERN_INFO "hso: unloaded\n");
3339
3340 tty_unregister_driver(tty_drv);
3341 put_tty_driver(tty_drv);
3342 /* deregister the usb driver */
3343 usb_deregister(&hso_driver);
3344 }
3345
3346 /* Module definitions */
3347 module_init(hso_init);
3348 module_exit(hso_exit);
3349
3350 MODULE_AUTHOR(MOD_AUTHOR);
3351 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3352 MODULE_LICENSE(MOD_LICENSE);
3353
3354 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3355 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3356 module_param(debug, int, S_IRUGO | S_IWUSR);
3357
3358 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3359 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3360 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3361
3362 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3363 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3364 module_param(disable_net, int, S_IRUGO | S_IWUSR);
Linux ARM platform port for MOXA ART SoC