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72dc1c09 GKH |
1 | /****************************************************************************** |
2 | * | |
3 | * Driver for Option High Speed Mobile Devices. | |
4 | * | |
5 | * Copyright (C) 2008 Option International | |
6 | * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd) | |
7 | * <ajb@spheresystems.co.uk> | |
8 | * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de> | |
9 | * Copyright (C) 2008 Novell, Inc. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, | |
23 | * USA | |
24 | * | |
25 | * | |
26 | *****************************************************************************/ | |
27 | ||
28 | /****************************************************************************** | |
29 | * | |
30 | * Description of the device: | |
31 | * | |
32 | * Interface 0: Contains the IP network interface on the bulk end points. | |
33 | * The multiplexed serial ports are using the interrupt and | |
34 | * control endpoints. | |
35 | * Interrupt contains a bitmap telling which multiplexed | |
36 | * serialport needs servicing. | |
37 | * | |
38 | * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the | |
39 | * port is opened, as this have a huge impact on the network port | |
40 | * throughput. | |
41 | * | |
42 | * Interface 2: Standard modem interface - circuit switched interface, should | |
43 | * not be used. | |
44 | * | |
45 | *****************************************************************************/ | |
46 | ||
47 | #include <linux/sched.h> | |
48 | #include <linux/slab.h> | |
49 | #include <linux/init.h> | |
50 | #include <linux/delay.h> | |
51 | #include <linux/netdevice.h> | |
52 | #include <linux/module.h> | |
53 | #include <linux/ethtool.h> | |
54 | #include <linux/usb.h> | |
55 | #include <linux/timer.h> | |
56 | #include <linux/tty.h> | |
57 | #include <linux/tty_driver.h> | |
58 | #include <linux/tty_flip.h> | |
59 | #include <linux/kmod.h> | |
60 | #include <linux/rfkill.h> | |
61 | #include <linux/ip.h> | |
62 | #include <linux/uaccess.h> | |
63 | #include <linux/usb/cdc.h> | |
64 | #include <net/arp.h> | |
65 | #include <asm/byteorder.h> | |
66 | ||
67 | ||
68 | #define DRIVER_VERSION "1.2" | |
69 | #define MOD_AUTHOR "Option Wireless" | |
70 | #define MOD_DESCRIPTION "USB High Speed Option driver" | |
71 | #define MOD_LICENSE "GPL" | |
72 | ||
73 | #define HSO_MAX_NET_DEVICES 10 | |
74 | #define HSO__MAX_MTU 2048 | |
75 | #define DEFAULT_MTU 1500 | |
76 | #define DEFAULT_MRU 1500 | |
77 | ||
78 | #define CTRL_URB_RX_SIZE 1024 | |
79 | #define CTRL_URB_TX_SIZE 64 | |
80 | ||
81 | #define BULK_URB_RX_SIZE 4096 | |
82 | #define BULK_URB_TX_SIZE 8192 | |
83 | ||
84 | #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU | |
85 | #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU | |
86 | #define MUX_BULK_RX_BUF_COUNT 4 | |
87 | #define USB_TYPE_OPTION_VENDOR 0x20 | |
88 | ||
89 | /* These definitions are used with the struct hso_net flags element */ | |
90 | /* - use *_bit operations on it. (bit indices not values.) */ | |
91 | #define HSO_NET_RUNNING 0 | |
92 | ||
93 | #define HSO_NET_TX_TIMEOUT (HZ*10) | |
94 | ||
95 | /* Serial port defines and structs. */ | |
96 | #define HSO_SERIAL_FLAG_RX_SENT 0 | |
97 | ||
98 | #define HSO_SERIAL_MAGIC 0x48534f31 | |
99 | ||
100 | /* Number of ttys to handle */ | |
101 | #define HSO_SERIAL_TTY_MINORS 256 | |
102 | ||
103 | #define MAX_RX_URBS 2 | |
104 | ||
105 | #define get_serial_by_tty(x) \ | |
106 | (x ? (struct hso_serial *)x->driver_data : NULL) | |
107 | ||
108 | /*****************************************************************************/ | |
109 | /* Debugging functions */ | |
110 | /*****************************************************************************/ | |
111 | #define D__(lvl_, fmt, arg...) \ | |
112 | do { \ | |
113 | printk(lvl_ "[%d:%s]: " fmt "\n", \ | |
114 | __LINE__, __func__, ## arg); \ | |
115 | } while (0) | |
116 | ||
117 | #define D_(lvl, args...) \ | |
118 | do { \ | |
119 | if (lvl & debug) \ | |
120 | D__(KERN_INFO, args); \ | |
121 | } while (0) | |
122 | ||
123 | #define D1(args...) D_(0x01, ##args) | |
124 | #define D2(args...) D_(0x02, ##args) | |
125 | #define D3(args...) D_(0x04, ##args) | |
126 | #define D4(args...) D_(0x08, ##args) | |
127 | #define D5(args...) D_(0x10, ##args) | |
128 | ||
129 | /*****************************************************************************/ | |
130 | /* Enumerators */ | |
131 | /*****************************************************************************/ | |
132 | enum pkt_parse_state { | |
133 | WAIT_IP, | |
134 | WAIT_DATA, | |
135 | WAIT_SYNC | |
136 | }; | |
137 | ||
138 | /*****************************************************************************/ | |
139 | /* Structs */ | |
140 | /*****************************************************************************/ | |
141 | ||
142 | struct hso_shared_int { | |
143 | struct usb_endpoint_descriptor *intr_endp; | |
144 | void *shared_intr_buf; | |
145 | struct urb *shared_intr_urb; | |
146 | struct usb_device *usb; | |
147 | int use_count; | |
148 | int ref_count; | |
149 | struct mutex shared_int_lock; | |
150 | }; | |
151 | ||
152 | struct hso_net { | |
153 | struct hso_device *parent; | |
154 | struct net_device *net; | |
155 | struct rfkill *rfkill; | |
156 | ||
157 | struct usb_endpoint_descriptor *in_endp; | |
158 | struct usb_endpoint_descriptor *out_endp; | |
159 | ||
160 | struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT]; | |
161 | struct urb *mux_bulk_tx_urb; | |
162 | void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT]; | |
163 | void *mux_bulk_tx_buf; | |
164 | ||
165 | struct sk_buff *skb_rx_buf; | |
166 | struct sk_buff *skb_tx_buf; | |
167 | ||
168 | enum pkt_parse_state rx_parse_state; | |
169 | spinlock_t net_lock; | |
170 | ||
171 | unsigned short rx_buf_size; | |
172 | unsigned short rx_buf_missing; | |
173 | struct iphdr rx_ip_hdr; | |
174 | ||
175 | unsigned long flags; | |
176 | }; | |
177 | ||
178 | struct hso_serial { | |
179 | struct hso_device *parent; | |
180 | int magic; | |
181 | u8 minor; | |
182 | ||
183 | struct hso_shared_int *shared_int; | |
184 | ||
185 | /* rx/tx urb could be either a bulk urb or a control urb depending | |
186 | on which serial port it is used on. */ | |
187 | struct urb *rx_urb[MAX_RX_URBS]; | |
188 | u8 num_rx_urbs; | |
189 | u8 *rx_data[MAX_RX_URBS]; | |
190 | u16 rx_data_length; /* should contain allocated length */ | |
191 | ||
192 | struct urb *tx_urb; | |
193 | u8 *tx_data; | |
194 | u8 *tx_buffer; | |
195 | u16 tx_data_length; /* should contain allocated length */ | |
196 | u16 tx_data_count; | |
197 | u16 tx_buffer_count; | |
198 | struct usb_ctrlrequest ctrl_req_tx; | |
199 | struct usb_ctrlrequest ctrl_req_rx; | |
200 | ||
201 | struct usb_endpoint_descriptor *in_endp; | |
202 | struct usb_endpoint_descriptor *out_endp; | |
203 | ||
204 | unsigned long flags; | |
205 | u8 rts_state; | |
206 | u8 dtr_state; | |
207 | unsigned tx_urb_used:1; | |
208 | ||
209 | /* from usb_serial_port */ | |
210 | struct tty_struct *tty; | |
211 | int open_count; | |
212 | spinlock_t serial_lock; | |
213 | ||
214 | int (*write_data) (struct hso_serial *serial); | |
215 | }; | |
216 | ||
217 | struct hso_device { | |
218 | union { | |
219 | struct hso_serial *dev_serial; | |
220 | struct hso_net *dev_net; | |
221 | } port_data; | |
222 | ||
223 | u32 port_spec; | |
224 | ||
225 | u8 is_active; | |
226 | u8 usb_gone; | |
227 | struct work_struct async_get_intf; | |
228 | struct work_struct async_put_intf; | |
229 | ||
230 | struct usb_device *usb; | |
231 | struct usb_interface *interface; | |
232 | ||
233 | struct device *dev; | |
234 | struct kref ref; | |
235 | struct mutex mutex; | |
236 | }; | |
237 | ||
238 | /* Type of interface */ | |
239 | #define HSO_INTF_MASK 0xFF00 | |
240 | #define HSO_INTF_MUX 0x0100 | |
241 | #define HSO_INTF_BULK 0x0200 | |
242 | ||
243 | /* Type of port */ | |
244 | #define HSO_PORT_MASK 0xFF | |
245 | #define HSO_PORT_NO_PORT 0x0 | |
246 | #define HSO_PORT_CONTROL 0x1 | |
247 | #define HSO_PORT_APP 0x2 | |
248 | #define HSO_PORT_GPS 0x3 | |
249 | #define HSO_PORT_PCSC 0x4 | |
250 | #define HSO_PORT_APP2 0x5 | |
251 | #define HSO_PORT_GPS_CONTROL 0x6 | |
252 | #define HSO_PORT_MSD 0x7 | |
253 | #define HSO_PORT_VOICE 0x8 | |
254 | #define HSO_PORT_DIAG2 0x9 | |
255 | #define HSO_PORT_DIAG 0x10 | |
256 | #define HSO_PORT_MODEM 0x11 | |
257 | #define HSO_PORT_NETWORK 0x12 | |
258 | ||
259 | /* Additional device info */ | |
260 | #define HSO_INFO_MASK 0xFF000000 | |
261 | #define HSO_INFO_CRC_BUG 0x01000000 | |
262 | ||
263 | /*****************************************************************************/ | |
264 | /* Prototypes */ | |
265 | /*****************************************************************************/ | |
266 | /* Serial driver functions */ | |
267 | static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, | |
268 | unsigned int set, unsigned int clear); | |
269 | static void ctrl_callback(struct urb *urb); | |
270 | static void put_rxbuf_data(struct urb *urb, struct hso_serial *serial); | |
271 | static void hso_kick_transmit(struct hso_serial *serial); | |
272 | /* Helper functions */ | |
273 | static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, | |
274 | struct usb_device *usb, gfp_t gfp); | |
275 | static void log_usb_status(int status, const char *function); | |
276 | static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, | |
277 | int type, int dir); | |
278 | static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); | |
279 | static void hso_free_interface(struct usb_interface *intf); | |
280 | static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); | |
281 | static int hso_stop_serial_device(struct hso_device *hso_dev); | |
282 | static int hso_start_net_device(struct hso_device *hso_dev); | |
283 | static void hso_free_shared_int(struct hso_shared_int *shared_int); | |
284 | static int hso_stop_net_device(struct hso_device *hso_dev); | |
285 | static void hso_serial_ref_free(struct kref *ref); | |
286 | static void async_get_intf(struct work_struct *data); | |
287 | static void async_put_intf(struct work_struct *data); | |
288 | static int hso_put_activity(struct hso_device *hso_dev); | |
289 | static int hso_get_activity(struct hso_device *hso_dev); | |
290 | ||
291 | /*****************************************************************************/ | |
292 | /* Helping functions */ | |
293 | /*****************************************************************************/ | |
294 | ||
295 | /* #define DEBUG */ | |
296 | ||
297 | #define dev2net(x) (x->port_data.dev_net) | |
298 | #define dev2ser(x) (x->port_data.dev_serial) | |
299 | ||
300 | /* Debugging functions */ | |
301 | #ifdef DEBUG | |
302 | static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, | |
303 | unsigned int len) | |
304 | { | |
305 | u8 i = 0; | |
306 | ||
307 | printk(KERN_DEBUG "[%d:%s]: len %d", line_count, func_name, len); | |
308 | ||
309 | for (i = 0; i < len; i++) { | |
310 | if (!(i % 16)) | |
311 | printk("\n 0x%03x: ", i); | |
312 | printk("%02x ", (unsigned char)buf[i]); | |
313 | } | |
314 | printk("\n"); | |
315 | } | |
316 | ||
317 | #define DUMP(buf_, len_) \ | |
318 | dbg_dump(__LINE__, __func__, buf_, len_) | |
319 | ||
320 | #define DUMP1(buf_, len_) \ | |
321 | do { \ | |
322 | if (0x01 & debug) \ | |
323 | DUMP(buf_, len_); \ | |
324 | } while (0) | |
325 | #else | |
326 | #define DUMP(buf_, len_) | |
327 | #define DUMP1(buf_, len_) | |
328 | #endif | |
329 | ||
330 | /* module parameters */ | |
331 | static int debug; | |
332 | static int tty_major; | |
333 | static int disable_net; | |
334 | ||
335 | /* driver info */ | |
336 | static const char driver_name[] = "hso"; | |
337 | static const char tty_filename[] = "ttyHS"; | |
338 | static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR; | |
339 | /* the usb driver itself (registered in hso_init) */ | |
340 | static struct usb_driver hso_driver; | |
341 | /* serial structures */ | |
342 | static struct tty_driver *tty_drv; | |
343 | static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; | |
344 | static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; | |
345 | static spinlock_t serial_table_lock; | |
346 | static struct ktermios *hso_serial_termios[HSO_SERIAL_TTY_MINORS]; | |
347 | static struct ktermios *hso_serial_termios_locked[HSO_SERIAL_TTY_MINORS]; | |
348 | ||
349 | static const s32 default_port_spec[] = { | |
350 | HSO_INTF_MUX | HSO_PORT_NETWORK, | |
351 | HSO_INTF_BULK | HSO_PORT_DIAG, | |
352 | HSO_INTF_BULK | HSO_PORT_MODEM, | |
353 | 0 | |
354 | }; | |
355 | ||
356 | static const s32 icon321_port_spec[] = { | |
357 | HSO_INTF_MUX | HSO_PORT_NETWORK, | |
358 | HSO_INTF_BULK | HSO_PORT_DIAG2, | |
359 | HSO_INTF_BULK | HSO_PORT_MODEM, | |
360 | HSO_INTF_BULK | HSO_PORT_DIAG, | |
361 | 0 | |
362 | }; | |
363 | ||
364 | #define default_port_device(vendor, product) \ | |
365 | USB_DEVICE(vendor, product), \ | |
366 | .driver_info = (kernel_ulong_t)default_port_spec | |
367 | ||
368 | #define icon321_port_device(vendor, product) \ | |
369 | USB_DEVICE(vendor, product), \ | |
370 | .driver_info = (kernel_ulong_t)icon321_port_spec | |
371 | ||
372 | /* list of devices we support */ | |
373 | static const struct usb_device_id hso_ids[] = { | |
374 | {default_port_device(0x0af0, 0x6711)}, | |
375 | {default_port_device(0x0af0, 0x6731)}, | |
376 | {default_port_device(0x0af0, 0x6751)}, | |
377 | {default_port_device(0x0af0, 0x6771)}, | |
378 | {default_port_device(0x0af0, 0x6791)}, | |
379 | {default_port_device(0x0af0, 0x6811)}, | |
380 | {default_port_device(0x0af0, 0x6911)}, | |
381 | {default_port_device(0x0af0, 0x6951)}, | |
382 | {default_port_device(0x0af0, 0x6971)}, | |
383 | {default_port_device(0x0af0, 0x7011)}, | |
384 | {default_port_device(0x0af0, 0x7031)}, | |
385 | {default_port_device(0x0af0, 0x7051)}, | |
386 | {default_port_device(0x0af0, 0x7071)}, | |
387 | {default_port_device(0x0af0, 0x7111)}, | |
388 | {default_port_device(0x0af0, 0x7211)}, | |
389 | {default_port_device(0x0af0, 0x7251)}, | |
390 | {default_port_device(0x0af0, 0x7271)}, | |
391 | {default_port_device(0x0af0, 0x7311)}, | |
392 | {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ | |
393 | {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ | |
394 | {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ | |
395 | {default_port_device(0x0af0, 0xd033)}, /* Icon-322 */ | |
396 | {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ | |
397 | {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ | |
398 | {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ | |
399 | {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ | |
400 | {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ | |
401 | {} | |
402 | }; | |
403 | MODULE_DEVICE_TABLE(usb, hso_ids); | |
404 | ||
405 | /* Sysfs attribute */ | |
406 | static ssize_t hso_sysfs_show_porttype(struct device *dev, | |
407 | struct device_attribute *attr, | |
408 | char *buf) | |
409 | { | |
410 | struct hso_device *hso_dev = dev->driver_data; | |
411 | char *port_name; | |
412 | ||
413 | if (!hso_dev) | |
414 | return 0; | |
415 | ||
416 | switch (hso_dev->port_spec & HSO_PORT_MASK) { | |
417 | case HSO_PORT_CONTROL: | |
418 | port_name = "Control"; | |
419 | break; | |
420 | case HSO_PORT_APP: | |
421 | port_name = "Application"; | |
422 | break; | |
423 | case HSO_PORT_APP2: | |
424 | port_name = "Application2"; | |
425 | break; | |
426 | case HSO_PORT_GPS: | |
427 | port_name = "GPS"; | |
428 | break; | |
429 | case HSO_PORT_GPS_CONTROL: | |
430 | port_name = "GPS Control"; | |
431 | break; | |
432 | case HSO_PORT_PCSC: | |
433 | port_name = "PCSC"; | |
434 | break; | |
435 | case HSO_PORT_DIAG: | |
436 | port_name = "Diagnostic"; | |
437 | break; | |
438 | case HSO_PORT_DIAG2: | |
439 | port_name = "Diagnostic2"; | |
440 | break; | |
441 | case HSO_PORT_MODEM: | |
442 | port_name = "Modem"; | |
443 | break; | |
444 | case HSO_PORT_NETWORK: | |
445 | port_name = "Network"; | |
446 | break; | |
447 | default: | |
448 | port_name = "Unknown"; | |
449 | break; | |
450 | } | |
451 | ||
452 | return sprintf(buf, "%s\n", port_name); | |
453 | } | |
454 | static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL); | |
455 | ||
456 | /* converts mux value to a port spec value */ | |
457 | static u32 hso_mux_to_port(int mux) | |
458 | { | |
459 | u32 result; | |
460 | ||
461 | switch (mux) { | |
462 | case 0x1: | |
463 | result = HSO_PORT_CONTROL; | |
464 | break; | |
465 | case 0x2: | |
466 | result = HSO_PORT_APP; | |
467 | break; | |
468 | case 0x4: | |
469 | result = HSO_PORT_PCSC; | |
470 | break; | |
471 | case 0x8: | |
472 | result = HSO_PORT_GPS; | |
473 | break; | |
474 | case 0x10: | |
475 | result = HSO_PORT_APP2; | |
476 | break; | |
477 | default: | |
478 | result = HSO_PORT_NO_PORT; | |
479 | } | |
480 | return result; | |
481 | } | |
482 | ||
483 | /* converts port spec value to a mux value */ | |
484 | static u32 hso_port_to_mux(int port) | |
485 | { | |
486 | u32 result; | |
487 | ||
488 | switch (port & HSO_PORT_MASK) { | |
489 | case HSO_PORT_CONTROL: | |
490 | result = 0x0; | |
491 | break; | |
492 | case HSO_PORT_APP: | |
493 | result = 0x1; | |
494 | break; | |
495 | case HSO_PORT_PCSC: | |
496 | result = 0x2; | |
497 | break; | |
498 | case HSO_PORT_GPS: | |
499 | result = 0x3; | |
500 | break; | |
501 | case HSO_PORT_APP2: | |
502 | result = 0x4; | |
503 | break; | |
504 | default: | |
505 | result = 0x0; | |
506 | } | |
507 | return result; | |
508 | } | |
509 | ||
510 | static struct hso_serial *get_serial_by_shared_int_and_type( | |
511 | struct hso_shared_int *shared_int, | |
512 | int mux) | |
513 | { | |
514 | int i, port; | |
515 | ||
516 | port = hso_mux_to_port(mux); | |
517 | ||
518 | for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { | |
519 | if (serial_table[i] | |
520 | && (dev2ser(serial_table[i])->shared_int == shared_int) | |
521 | && ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { | |
522 | return dev2ser(serial_table[i]); | |
523 | } | |
524 | } | |
525 | ||
526 | return NULL; | |
527 | } | |
528 | ||
529 | static struct hso_serial *get_serial_by_index(unsigned index) | |
530 | { | |
531 | struct hso_serial *serial; | |
532 | unsigned long flags; | |
533 | ||
534 | if (!serial_table[index]) | |
535 | return NULL; | |
536 | spin_lock_irqsave(&serial_table_lock, flags); | |
537 | serial = dev2ser(serial_table[index]); | |
538 | spin_unlock_irqrestore(&serial_table_lock, flags); | |
539 | ||
540 | return serial; | |
541 | } | |
542 | ||
543 | static int get_free_serial_index(void) | |
544 | { | |
545 | int index; | |
546 | unsigned long flags; | |
547 | ||
548 | spin_lock_irqsave(&serial_table_lock, flags); | |
549 | for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { | |
550 | if (serial_table[index] == NULL) { | |
551 | spin_unlock_irqrestore(&serial_table_lock, flags); | |
552 | return index; | |
553 | } | |
554 | } | |
555 | spin_unlock_irqrestore(&serial_table_lock, flags); | |
556 | ||
557 | printk(KERN_ERR "%s: no free serial devices in table\n", __func__); | |
558 | return -1; | |
559 | } | |
560 | ||
561 | static void set_serial_by_index(unsigned index, struct hso_serial *serial) | |
562 | { | |
563 | unsigned long flags; | |
564 | spin_lock_irqsave(&serial_table_lock, flags); | |
565 | if (serial) | |
566 | serial_table[index] = serial->parent; | |
567 | else | |
568 | serial_table[index] = NULL; | |
569 | spin_unlock_irqrestore(&serial_table_lock, flags); | |
570 | } | |
571 | ||
572 | /* log a meaningfull explanation of an USB status */ | |
573 | static void log_usb_status(int status, const char *function) | |
574 | { | |
575 | char *explanation; | |
576 | ||
577 | switch (status) { | |
578 | case -ENODEV: | |
579 | explanation = "no device"; | |
580 | break; | |
581 | case -ENOENT: | |
582 | explanation = "endpoint not enabled"; | |
583 | break; | |
584 | case -EPIPE: | |
585 | explanation = "endpoint stalled"; | |
586 | break; | |
587 | case -ENOSPC: | |
588 | explanation = "not enough bandwidth"; | |
589 | break; | |
590 | case -ESHUTDOWN: | |
591 | explanation = "device disabled"; | |
592 | break; | |
593 | case -EHOSTUNREACH: | |
594 | explanation = "device suspended"; | |
595 | break; | |
596 | case -EINVAL: | |
597 | case -EAGAIN: | |
598 | case -EFBIG: | |
599 | case -EMSGSIZE: | |
600 | explanation = "internal error"; | |
601 | break; | |
602 | default: | |
603 | explanation = "unknown status"; | |
604 | break; | |
605 | } | |
606 | D1("%s: received USB status - %s (%d)", function, explanation, status); | |
607 | } | |
608 | ||
609 | /* Network interface functions */ | |
610 | ||
611 | /* called when net interface is brought up by ifconfig */ | |
612 | static int hso_net_open(struct net_device *net) | |
613 | { | |
614 | struct hso_net *odev = netdev_priv(net); | |
615 | unsigned long flags = 0; | |
616 | ||
617 | if (!odev) { | |
618 | dev_err(&net->dev, "No net device !\n"); | |
619 | return -ENODEV; | |
620 | } | |
621 | ||
622 | odev->skb_tx_buf = NULL; | |
623 | ||
624 | /* setup environment */ | |
625 | spin_lock_irqsave(&odev->net_lock, flags); | |
626 | odev->rx_parse_state = WAIT_IP; | |
627 | odev->rx_buf_size = 0; | |
628 | odev->rx_buf_missing = sizeof(struct iphdr); | |
629 | spin_unlock_irqrestore(&odev->net_lock, flags); | |
630 | ||
631 | hso_start_net_device(odev->parent); | |
632 | ||
633 | /* We are up and running. */ | |
634 | set_bit(HSO_NET_RUNNING, &odev->flags); | |
635 | ||
636 | /* Tell the kernel we are ready to start receiving from it */ | |
637 | netif_start_queue(net); | |
638 | ||
639 | return 0; | |
640 | } | |
641 | ||
642 | /* called when interface is brought down by ifconfig */ | |
643 | static int hso_net_close(struct net_device *net) | |
644 | { | |
645 | struct hso_net *odev = netdev_priv(net); | |
646 | ||
647 | /* we don't need the queue anymore */ | |
648 | netif_stop_queue(net); | |
649 | /* no longer running */ | |
650 | clear_bit(HSO_NET_RUNNING, &odev->flags); | |
651 | ||
652 | hso_stop_net_device(odev->parent); | |
653 | ||
654 | /* done */ | |
655 | return 0; | |
656 | } | |
657 | ||
658 | /* USB tells is xmit done, we should start the netqueue again */ | |
659 | static void write_bulk_callback(struct urb *urb) | |
660 | { | |
661 | struct hso_net *odev = urb->context; | |
662 | int status = urb->status; | |
663 | ||
664 | /* Sanity check */ | |
665 | if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { | |
666 | dev_err(&urb->dev->dev, "%s: device not running\n", __func__); | |
667 | return; | |
668 | } | |
669 | ||
670 | /* Do we still have a valid kernel network device? */ | |
671 | if (!netif_device_present(odev->net)) { | |
672 | dev_err(&urb->dev->dev, "%s: net device not present\n", | |
673 | __func__); | |
674 | return; | |
675 | } | |
676 | ||
677 | /* log status, but don't act on it, we don't need to resubmit anything | |
678 | * anyhow */ | |
679 | if (status) | |
680 | log_usb_status(status, __func__); | |
681 | ||
682 | hso_put_activity(odev->parent); | |
683 | ||
684 | /* Tell the network interface we are ready for another frame */ | |
685 | netif_wake_queue(odev->net); | |
686 | } | |
687 | ||
688 | /* called by kernel when we need to transmit a packet */ | |
689 | static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net) | |
690 | { | |
691 | struct hso_net *odev = netdev_priv(net); | |
692 | int result; | |
693 | ||
694 | /* Tell the kernel, "No more frames 'til we are done with this one." */ | |
695 | netif_stop_queue(net); | |
696 | if (hso_get_activity(odev->parent) == -EAGAIN) { | |
697 | odev->skb_tx_buf = skb; | |
698 | return 0; | |
699 | } | |
700 | ||
701 | /* log if asked */ | |
702 | DUMP1(skb->data, skb->len); | |
703 | /* Copy it from kernel memory to OUR memory */ | |
704 | memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); | |
705 | D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE); | |
706 | ||
707 | /* Fill in the URB for shipping it out. */ | |
708 | usb_fill_bulk_urb(odev->mux_bulk_tx_urb, | |
709 | odev->parent->usb, | |
710 | usb_sndbulkpipe(odev->parent->usb, | |
711 | odev->out_endp-> | |
712 | bEndpointAddress & 0x7F), | |
713 | odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, | |
714 | odev); | |
715 | ||
716 | /* Deal with the Zero Length packet problem, I hope */ | |
717 | odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; | |
718 | ||
719 | /* Send the URB on its merry way. */ | |
720 | result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); | |
721 | if (result) { | |
722 | dev_warn(&odev->parent->interface->dev, | |
723 | "failed mux_bulk_tx_urb %d", result); | |
724 | net->stats.tx_errors++; | |
725 | netif_start_queue(net); | |
726 | } else { | |
727 | net->stats.tx_packets++; | |
728 | net->stats.tx_bytes += skb->len; | |
729 | /* And tell the kernel when the last transmit started. */ | |
730 | net->trans_start = jiffies; | |
731 | } | |
732 | dev_kfree_skb(skb); | |
733 | /* we're done */ | |
734 | return result; | |
735 | } | |
736 | ||
737 | static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) | |
738 | { | |
739 | struct hso_net *odev = netdev_priv(net); | |
740 | ||
741 | strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN); | |
742 | strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN); | |
743 | usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info); | |
744 | } | |
745 | ||
746 | static struct ethtool_ops ops = { | |
747 | .get_drvinfo = hso_get_drvinfo, | |
748 | .get_link = ethtool_op_get_link | |
749 | }; | |
750 | ||
751 | /* called when a packet did not ack after watchdogtimeout */ | |
752 | static void hso_net_tx_timeout(struct net_device *net) | |
753 | { | |
754 | struct hso_net *odev = netdev_priv(net); | |
755 | ||
756 | if (!odev) | |
757 | return; | |
758 | ||
759 | /* Tell syslog we are hosed. */ | |
760 | dev_warn(&net->dev, "Tx timed out.\n"); | |
761 | ||
762 | /* Tear the waiting frame off the list */ | |
763 | if (odev->mux_bulk_tx_urb | |
764 | && (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) | |
765 | usb_unlink_urb(odev->mux_bulk_tx_urb); | |
766 | ||
767 | /* Update statistics */ | |
768 | net->stats.tx_errors++; | |
769 | } | |
770 | ||
771 | /* make a real packet from the received USB buffer */ | |
772 | static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, | |
773 | unsigned int count, unsigned char is_eop) | |
774 | { | |
775 | unsigned short temp_bytes; | |
776 | unsigned short buffer_offset = 0; | |
777 | unsigned short frame_len; | |
778 | unsigned char *tmp_rx_buf; | |
779 | ||
780 | /* log if needed */ | |
781 | D1("Rx %d bytes", count); | |
782 | DUMP(ip_pkt, min(128, (int)count)); | |
783 | ||
784 | while (count) { | |
785 | switch (odev->rx_parse_state) { | |
786 | case WAIT_IP: | |
787 | /* waiting for IP header. */ | |
788 | /* wanted bytes - size of ip header */ | |
789 | temp_bytes = | |
790 | (count < | |
791 | odev->rx_buf_missing) ? count : odev-> | |
792 | rx_buf_missing; | |
793 | ||
794 | memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + | |
795 | odev->rx_buf_size, ip_pkt + buffer_offset, | |
796 | temp_bytes); | |
797 | ||
798 | odev->rx_buf_size += temp_bytes; | |
799 | buffer_offset += temp_bytes; | |
800 | odev->rx_buf_missing -= temp_bytes; | |
801 | count -= temp_bytes; | |
802 | ||
803 | if (!odev->rx_buf_missing) { | |
804 | /* header is complete allocate an sk_buffer and | |
805 | * continue to WAIT_DATA */ | |
806 | frame_len = ntohs(odev->rx_ip_hdr.tot_len); | |
807 | ||
808 | if ((frame_len > DEFAULT_MRU) || | |
809 | (frame_len < sizeof(struct iphdr))) { | |
810 | dev_err(&odev->net->dev, | |
811 | "Invalid frame (%d) length\n", | |
812 | frame_len); | |
813 | odev->rx_parse_state = WAIT_SYNC; | |
814 | continue; | |
815 | } | |
816 | /* Allocate an sk_buff */ | |
817 | odev->skb_rx_buf = dev_alloc_skb(frame_len); | |
818 | if (!odev->skb_rx_buf) { | |
819 | /* We got no receive buffer. */ | |
820 | D1("could not allocate memory"); | |
821 | odev->rx_parse_state = WAIT_SYNC; | |
822 | return; | |
823 | } | |
824 | /* Here's where it came from */ | |
825 | odev->skb_rx_buf->dev = odev->net; | |
826 | ||
827 | /* Copy what we got so far. make room for iphdr | |
828 | * after tail. */ | |
829 | tmp_rx_buf = | |
830 | skb_put(odev->skb_rx_buf, | |
831 | sizeof(struct iphdr)); | |
832 | memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr), | |
833 | sizeof(struct iphdr)); | |
834 | ||
835 | /* ETH_HLEN */ | |
836 | odev->rx_buf_size = sizeof(struct iphdr); | |
837 | ||
838 | /* Filip actually use .tot_len */ | |
839 | odev->rx_buf_missing = | |
840 | frame_len - sizeof(struct iphdr); | |
841 | odev->rx_parse_state = WAIT_DATA; | |
842 | } | |
843 | break; | |
844 | ||
845 | case WAIT_DATA: | |
846 | temp_bytes = (count < odev->rx_buf_missing) | |
847 | ? count : odev->rx_buf_missing; | |
848 | ||
849 | /* Copy the rest of the bytes that are left in the | |
850 | * buffer into the waiting sk_buf. */ | |
851 | /* Make room for temp_bytes after tail. */ | |
852 | tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes); | |
853 | memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes); | |
854 | ||
855 | odev->rx_buf_missing -= temp_bytes; | |
856 | count -= temp_bytes; | |
857 | buffer_offset += temp_bytes; | |
858 | odev->rx_buf_size += temp_bytes; | |
859 | if (!odev->rx_buf_missing) { | |
860 | /* Packet is complete. Inject into stack. */ | |
861 | /* We have IP packet here */ | |
862 | odev->skb_rx_buf->protocol = | |
863 | __constant_htons(ETH_P_IP); | |
864 | /* don't check it */ | |
865 | odev->skb_rx_buf->ip_summed = | |
866 | CHECKSUM_UNNECESSARY; | |
867 | ||
868 | skb_reset_mac_header(odev->skb_rx_buf); | |
869 | ||
870 | /* Ship it off to the kernel */ | |
871 | netif_rx(odev->skb_rx_buf); | |
872 | /* No longer our buffer. */ | |
873 | odev->skb_rx_buf = NULL; | |
874 | ||
875 | /* update out statistics */ | |
876 | odev->net->stats.rx_packets++; | |
877 | ||
878 | odev->net->stats.rx_bytes += odev->rx_buf_size; | |
879 | ||
880 | odev->rx_buf_size = 0; | |
881 | odev->rx_buf_missing = sizeof(struct iphdr); | |
882 | odev->rx_parse_state = WAIT_IP; | |
883 | } | |
884 | break; | |
885 | ||
886 | case WAIT_SYNC: | |
887 | D1(" W_S"); | |
888 | count = 0; | |
889 | break; | |
890 | default: | |
891 | D1(" "); | |
892 | count--; | |
893 | break; | |
894 | } | |
895 | } | |
896 | ||
897 | /* Recovery mechanism for WAIT_SYNC state. */ | |
898 | if (is_eop) { | |
899 | if (odev->rx_parse_state == WAIT_SYNC) { | |
900 | odev->rx_parse_state = WAIT_IP; | |
901 | odev->rx_buf_size = 0; | |
902 | odev->rx_buf_missing = sizeof(struct iphdr); | |
903 | } | |
904 | } | |
905 | } | |
906 | ||
907 | /* Moving data from usb to kernel (in interrupt state) */ | |
908 | static void read_bulk_callback(struct urb *urb) | |
909 | { | |
910 | struct hso_net *odev = urb->context; | |
911 | struct net_device *net; | |
912 | int result; | |
913 | int status = urb->status; | |
914 | ||
915 | /* is al ok? (Filip: Who's Al ?) */ | |
916 | if (status) { | |
917 | log_usb_status(status, __func__); | |
918 | return; | |
919 | } | |
920 | ||
921 | /* Sanity check */ | |
922 | if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { | |
923 | D1("BULK IN callback but driver is not active!"); | |
924 | return; | |
925 | } | |
926 | usb_mark_last_busy(urb->dev); | |
927 | ||
928 | net = odev->net; | |
929 | ||
930 | if (!netif_device_present(net)) { | |
931 | /* Somebody killed our network interface... */ | |
932 | return; | |
933 | } | |
934 | ||
935 | if (odev->parent->port_spec & HSO_INFO_CRC_BUG) { | |
936 | u32 rest; | |
937 | u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; | |
938 | rest = urb->actual_length % odev->in_endp->wMaxPacketSize; | |
939 | if (((rest == 5) || (rest == 6)) | |
940 | && !memcmp(((u8 *) urb->transfer_buffer) + | |
941 | urb->actual_length - 4, crc_check, 4)) { | |
942 | urb->actual_length -= 4; | |
943 | } | |
944 | } | |
945 | ||
946 | /* do we even have a packet? */ | |
947 | if (urb->actual_length) { | |
948 | /* Handle the IP stream, add header and push it onto network | |
949 | * stack if the packet is complete. */ | |
950 | spin_lock(&odev->net_lock); | |
951 | packetizeRx(odev, urb->transfer_buffer, urb->actual_length, | |
952 | (urb->transfer_buffer_length > | |
953 | urb->actual_length) ? 1 : 0); | |
954 | spin_unlock(&odev->net_lock); | |
955 | } | |
956 | ||
957 | /* We are done with this URB, resubmit it. Prep the USB to wait for | |
958 | * another frame. Reuse same as received. */ | |
959 | usb_fill_bulk_urb(urb, | |
960 | odev->parent->usb, | |
961 | usb_rcvbulkpipe(odev->parent->usb, | |
962 | odev->in_endp-> | |
963 | bEndpointAddress & 0x7F), | |
964 | urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, | |
965 | read_bulk_callback, odev); | |
966 | ||
967 | /* Give this to the USB subsystem so it can tell us when more data | |
968 | * arrives. */ | |
969 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
970 | if (result) | |
971 | dev_warn(&odev->parent->interface->dev, | |
972 | "%s failed submit mux_bulk_rx_urb %d", __func__, | |
973 | result); | |
974 | } | |
975 | ||
976 | /* Serial driver functions */ | |
977 | ||
978 | static void _hso_serial_set_termios(struct tty_struct *tty, | |
979 | struct ktermios *old) | |
980 | { | |
981 | struct hso_serial *serial = get_serial_by_tty(tty); | |
982 | struct ktermios *termios; | |
983 | ||
984 | if ((!tty) || (!tty->termios) || (!serial)) { | |
985 | printk(KERN_ERR "%s: no tty structures", __func__); | |
986 | return; | |
987 | } | |
988 | ||
989 | D4("port %d", serial->minor); | |
990 | ||
991 | /* | |
992 | * The default requirements for this device are: | |
993 | */ | |
994 | termios = tty->termios; | |
995 | termios->c_iflag &= | |
996 | ~(IGNBRK /* disable ignore break */ | |
997 | | BRKINT /* disable break causes interrupt */ | |
998 | | PARMRK /* disable mark parity errors */ | |
999 | | ISTRIP /* disable clear high bit of input characters */ | |
1000 | | INLCR /* disable translate NL to CR */ | |
1001 | | IGNCR /* disable ignore CR */ | |
1002 | | ICRNL /* disable translate CR to NL */ | |
1003 | | IXON); /* disable enable XON/XOFF flow control */ | |
1004 | ||
1005 | /* disable postprocess output characters */ | |
1006 | termios->c_oflag &= ~OPOST; | |
1007 | ||
1008 | termios->c_lflag &= | |
1009 | ~(ECHO /* disable echo input characters */ | |
1010 | | ECHONL /* disable echo new line */ | |
1011 | | ICANON /* disable erase, kill, werase, and rprnt | |
1012 | special characters */ | |
1013 | | ISIG /* disable interrupt, quit, and suspend special | |
1014 | characters */ | |
1015 | | IEXTEN); /* disable non-POSIX special characters */ | |
1016 | ||
1017 | termios->c_cflag &= | |
1018 | ~(CSIZE /* no size */ | |
1019 | | PARENB /* disable parity bit */ | |
1020 | | CBAUD /* clear current baud rate */ | |
1021 | | CBAUDEX); /* clear current buad rate */ | |
1022 | ||
1023 | termios->c_cflag |= CS8; /* character size 8 bits */ | |
1024 | ||
1025 | /* baud rate 115200 */ | |
1026 | tty_encode_baud_rate(serial->tty, 115200, 115200); | |
1027 | ||
1028 | /* | |
1029 | * Force low_latency on; otherwise the pushes are scheduled; | |
1030 | * this is bad as it opens up the possibility of dropping bytes | |
1031 | * on the floor. We don't want to drop bytes on the floor. :) | |
1032 | */ | |
1033 | serial->tty->low_latency = 1; | |
1034 | return; | |
1035 | } | |
1036 | ||
1037 | /* open the requested serial port */ | |
1038 | static int hso_serial_open(struct tty_struct *tty, struct file *filp) | |
1039 | { | |
1040 | struct hso_serial *serial = get_serial_by_index(tty->index); | |
1041 | int result; | |
1042 | ||
1043 | /* sanity check */ | |
1044 | if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { | |
1045 | tty->driver_data = NULL; | |
1046 | D1("Failed to open port"); | |
1047 | return -ENODEV; | |
1048 | } | |
1049 | ||
1050 | mutex_lock(&serial->parent->mutex); | |
1051 | result = usb_autopm_get_interface(serial->parent->interface); | |
1052 | if (result < 0) | |
1053 | goto err_out; | |
1054 | ||
1055 | D1("Opening %d", serial->minor); | |
1056 | kref_get(&serial->parent->ref); | |
1057 | ||
1058 | /* setup */ | |
1059 | tty->driver_data = serial; | |
1060 | serial->tty = tty; | |
1061 | ||
1062 | /* check for port allready opened, if not set the termios */ | |
1063 | serial->open_count++; | |
1064 | if (serial->open_count == 1) { | |
1065 | tty->low_latency = 1; | |
1066 | serial->flags = 0; | |
1067 | /* Force default termio settings */ | |
1068 | _hso_serial_set_termios(tty, NULL); | |
1069 | result = hso_start_serial_device(serial->parent, GFP_KERNEL); | |
1070 | if (result) { | |
1071 | hso_stop_serial_device(serial->parent); | |
1072 | serial->open_count--; | |
1073 | kref_put(&serial->parent->ref, hso_serial_ref_free); | |
1074 | } | |
1075 | } else { | |
1076 | D1("Port was already open"); | |
1077 | } | |
1078 | ||
1079 | usb_autopm_put_interface(serial->parent->interface); | |
1080 | ||
1081 | /* done */ | |
1082 | if (result) | |
1083 | hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0); | |
1084 | err_out: | |
1085 | mutex_unlock(&serial->parent->mutex); | |
1086 | return result; | |
1087 | } | |
1088 | ||
1089 | /* close the requested serial port */ | |
1090 | static void hso_serial_close(struct tty_struct *tty, struct file *filp) | |
1091 | { | |
1092 | struct hso_serial *serial = tty->driver_data; | |
1093 | u8 usb_gone; | |
1094 | ||
1095 | D1("Closing serial port"); | |
1096 | ||
1097 | mutex_lock(&serial->parent->mutex); | |
1098 | usb_gone = serial->parent->usb_gone; | |
1099 | ||
1100 | if (!usb_gone) | |
1101 | usb_autopm_get_interface(serial->parent->interface); | |
1102 | ||
1103 | /* reset the rts and dtr */ | |
1104 | /* do the actual close */ | |
1105 | serial->open_count--; | |
6d558a52 | 1106 | kref_put(&serial->parent->ref, hso_serial_ref_free); |
72dc1c09 | 1107 | if (serial->open_count <= 0) { |
72dc1c09 GKH |
1108 | serial->open_count = 0; |
1109 | if (serial->tty) { | |
1110 | serial->tty->driver_data = NULL; | |
1111 | serial->tty = NULL; | |
1112 | } | |
1113 | if (!usb_gone) | |
1114 | hso_stop_serial_device(serial->parent); | |
1115 | } | |
1116 | if (!usb_gone) | |
1117 | usb_autopm_put_interface(serial->parent->interface); | |
1118 | mutex_unlock(&serial->parent->mutex); | |
1119 | } | |
1120 | ||
1121 | /* close the requested serial port */ | |
1122 | static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, | |
1123 | int count) | |
1124 | { | |
1125 | struct hso_serial *serial = get_serial_by_tty(tty); | |
1126 | int space, tx_bytes; | |
1127 | unsigned long flags; | |
1128 | ||
1129 | /* sanity check */ | |
1130 | if (serial == NULL) { | |
1131 | printk(KERN_ERR "%s: serial is NULL\n", __func__); | |
1132 | return -ENODEV; | |
1133 | } | |
1134 | ||
1135 | spin_lock_irqsave(&serial->serial_lock, flags); | |
1136 | ||
1137 | space = serial->tx_data_length - serial->tx_buffer_count; | |
1138 | tx_bytes = (count < space) ? count : space; | |
1139 | ||
1140 | if (!tx_bytes) | |
1141 | goto out; | |
1142 | ||
1143 | memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); | |
1144 | serial->tx_buffer_count += tx_bytes; | |
1145 | ||
1146 | out: | |
1147 | spin_unlock_irqrestore(&serial->serial_lock, flags); | |
1148 | ||
1149 | hso_kick_transmit(serial); | |
1150 | /* done */ | |
1151 | return tx_bytes; | |
1152 | } | |
1153 | ||
1154 | /* how much room is there for writing */ | |
1155 | static int hso_serial_write_room(struct tty_struct *tty) | |
1156 | { | |
1157 | struct hso_serial *serial = get_serial_by_tty(tty); | |
1158 | int room; | |
1159 | unsigned long flags; | |
1160 | ||
1161 | spin_lock_irqsave(&serial->serial_lock, flags); | |
1162 | room = serial->tx_data_length - serial->tx_buffer_count; | |
1163 | spin_unlock_irqrestore(&serial->serial_lock, flags); | |
1164 | ||
1165 | /* return free room */ | |
1166 | return room; | |
1167 | } | |
1168 | ||
1169 | /* setup the term */ | |
1170 | static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) | |
1171 | { | |
1172 | struct hso_serial *serial = get_serial_by_tty(tty); | |
1173 | unsigned long flags; | |
1174 | ||
1175 | if (old) | |
1176 | D5("Termios called with: cflags new[%d] - old[%d]", | |
1177 | tty->termios->c_cflag, old->c_cflag); | |
1178 | ||
1179 | /* the actual setup */ | |
1180 | spin_lock_irqsave(&serial->serial_lock, flags); | |
1181 | if (serial->open_count) | |
1182 | _hso_serial_set_termios(tty, old); | |
1183 | else | |
1184 | tty->termios = old; | |
1185 | spin_unlock_irqrestore(&serial->serial_lock, flags); | |
1186 | ||
1187 | /* done */ | |
1188 | return; | |
1189 | } | |
1190 | ||
1191 | /* how many characters in the buffer */ | |
1192 | static int hso_serial_chars_in_buffer(struct tty_struct *tty) | |
1193 | { | |
1194 | struct hso_serial *serial = get_serial_by_tty(tty); | |
1195 | int chars; | |
1196 | unsigned long flags; | |
1197 | ||
1198 | /* sanity check */ | |
1199 | if (serial == NULL) | |
1200 | return 0; | |
1201 | ||
1202 | spin_lock_irqsave(&serial->serial_lock, flags); | |
1203 | chars = serial->tx_buffer_count; | |
1204 | spin_unlock_irqrestore(&serial->serial_lock, flags); | |
1205 | ||
1206 | return chars; | |
1207 | } | |
1208 | ||
1209 | static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file) | |
1210 | { | |
1211 | unsigned int value; | |
1212 | struct hso_serial *serial = get_serial_by_tty(tty); | |
1213 | unsigned long flags; | |
1214 | ||
1215 | /* sanity check */ | |
1216 | if (!serial) { | |
1217 | D1("no tty structures"); | |
1218 | return -EINVAL; | |
1219 | } | |
1220 | ||
1221 | spin_lock_irqsave(&serial->serial_lock, flags); | |
1222 | value = ((serial->rts_state) ? TIOCM_RTS : 0) | | |
1223 | ((serial->dtr_state) ? TIOCM_DTR : 0); | |
1224 | spin_unlock_irqrestore(&serial->serial_lock, flags); | |
1225 | ||
1226 | return value; | |
1227 | } | |
1228 | ||
1229 | static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, | |
1230 | unsigned int set, unsigned int clear) | |
1231 | { | |
1232 | int val = 0; | |
1233 | unsigned long flags; | |
1234 | int if_num; | |
1235 | struct hso_serial *serial = get_serial_by_tty(tty); | |
1236 | ||
1237 | /* sanity check */ | |
1238 | if (!serial) { | |
1239 | D1("no tty structures"); | |
1240 | return -EINVAL; | |
1241 | } | |
1242 | if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; | |
1243 | ||
1244 | spin_lock_irqsave(&serial->serial_lock, flags); | |
1245 | if (set & TIOCM_RTS) | |
1246 | serial->rts_state = 1; | |
1247 | if (set & TIOCM_DTR) | |
1248 | serial->dtr_state = 1; | |
1249 | ||
1250 | if (clear & TIOCM_RTS) | |
1251 | serial->rts_state = 0; | |
1252 | if (clear & TIOCM_DTR) | |
1253 | serial->dtr_state = 0; | |
1254 | ||
1255 | if (serial->dtr_state) | |
1256 | val |= 0x01; | |
1257 | if (serial->rts_state) | |
1258 | val |= 0x02; | |
1259 | ||
1260 | spin_unlock_irqrestore(&serial->serial_lock, flags); | |
1261 | ||
1262 | return usb_control_msg(serial->parent->usb, | |
1263 | usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, | |
1264 | 0x21, val, if_num, NULL, 0, | |
1265 | USB_CTRL_SET_TIMEOUT); | |
1266 | } | |
1267 | ||
1268 | /* starts a transmit */ | |
1269 | static void hso_kick_transmit(struct hso_serial *serial) | |
1270 | { | |
1271 | u8 *temp; | |
1272 | unsigned long flags; | |
1273 | int res; | |
1274 | ||
1275 | spin_lock_irqsave(&serial->serial_lock, flags); | |
1276 | if (!serial->tx_buffer_count) | |
1277 | goto out; | |
1278 | ||
1279 | if (serial->tx_urb_used) | |
1280 | goto out; | |
1281 | ||
1282 | /* Wakeup USB interface if necessary */ | |
1283 | if (hso_get_activity(serial->parent) == -EAGAIN) | |
1284 | goto out; | |
1285 | ||
1286 | /* Switch pointers around to avoid memcpy */ | |
1287 | temp = serial->tx_buffer; | |
1288 | serial->tx_buffer = serial->tx_data; | |
1289 | serial->tx_data = temp; | |
1290 | serial->tx_data_count = serial->tx_buffer_count; | |
1291 | serial->tx_buffer_count = 0; | |
1292 | ||
1293 | /* If temp is set, it means we switched buffers */ | |
1294 | if (temp && serial->write_data) { | |
1295 | res = serial->write_data(serial); | |
1296 | if (res >= 0) | |
1297 | serial->tx_urb_used = 1; | |
1298 | } | |
1299 | out: | |
1300 | spin_unlock_irqrestore(&serial->serial_lock, flags); | |
1301 | } | |
1302 | ||
1303 | /* make a request (for reading and writing data to muxed serial port) */ | |
1304 | static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, | |
1305 | struct urb *ctrl_urb, | |
1306 | struct usb_ctrlrequest *ctrl_req, | |
1307 | u8 *ctrl_urb_data, u32 size) | |
1308 | { | |
1309 | int result; | |
1310 | int pipe; | |
1311 | ||
1312 | /* Sanity check */ | |
1313 | if (!serial || !ctrl_urb || !ctrl_req) { | |
1314 | printk(KERN_ERR "%s: Wrong arguments\n", __func__); | |
1315 | return -EINVAL; | |
1316 | } | |
1317 | ||
1318 | /* initialize */ | |
1319 | ctrl_req->wValue = 0; | |
1320 | ctrl_req->wIndex = hso_port_to_mux(port); | |
1321 | ctrl_req->wLength = size; | |
1322 | ||
1323 | if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { | |
1324 | /* Reading command */ | |
1325 | ctrl_req->bRequestType = USB_DIR_IN | | |
1326 | USB_TYPE_OPTION_VENDOR | | |
1327 | USB_RECIP_INTERFACE; | |
1328 | ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; | |
1329 | pipe = usb_rcvctrlpipe(serial->parent->usb, 0); | |
1330 | } else { | |
1331 | /* Writing command */ | |
1332 | ctrl_req->bRequestType = USB_DIR_OUT | | |
1333 | USB_TYPE_OPTION_VENDOR | | |
1334 | USB_RECIP_INTERFACE; | |
1335 | ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; | |
1336 | pipe = usb_sndctrlpipe(serial->parent->usb, 0); | |
1337 | } | |
1338 | /* syslog */ | |
1339 | D2("%s command (%02x) len: %d, port: %d", | |
1340 | type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", | |
1341 | ctrl_req->bRequestType, ctrl_req->wLength, port); | |
1342 | ||
1343 | /* Load ctrl urb */ | |
1344 | ctrl_urb->transfer_flags = 0; | |
1345 | usb_fill_control_urb(ctrl_urb, | |
1346 | serial->parent->usb, | |
1347 | pipe, | |
1348 | (u8 *) ctrl_req, | |
1349 | ctrl_urb_data, size, ctrl_callback, serial); | |
1350 | /* Send it on merry way */ | |
1351 | result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); | |
1352 | if (result) { | |
1353 | dev_err(&ctrl_urb->dev->dev, | |
1354 | "%s failed submit ctrl_urb %d type %d", __func__, | |
1355 | result, type); | |
1356 | return result; | |
1357 | } | |
1358 | ||
1359 | /* done */ | |
1360 | return size; | |
1361 | } | |
1362 | ||
1363 | /* called by intr_callback when read occurs */ | |
1364 | static int hso_mux_serial_read(struct hso_serial *serial) | |
1365 | { | |
1366 | if (!serial) | |
1367 | return -EINVAL; | |
1368 | ||
1369 | /* clean data */ | |
1370 | memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); | |
1371 | /* make the request */ | |
1372 | ||
1373 | if (serial->num_rx_urbs != 1) { | |
1374 | dev_err(&serial->parent->interface->dev, | |
1375 | "ERROR: mux'd reads with multiple buffers " | |
1376 | "not possible\n"); | |
1377 | return 0; | |
1378 | } | |
1379 | return mux_device_request(serial, | |
1380 | USB_CDC_GET_ENCAPSULATED_RESPONSE, | |
1381 | serial->parent->port_spec & HSO_PORT_MASK, | |
1382 | serial->rx_urb[0], | |
1383 | &serial->ctrl_req_rx, | |
1384 | serial->rx_data[0], serial->rx_data_length); | |
1385 | } | |
1386 | ||
1387 | /* used for muxed serial port callback (muxed serial read) */ | |
1388 | static void intr_callback(struct urb *urb) | |
1389 | { | |
1390 | struct hso_shared_int *shared_int = urb->context; | |
1391 | struct hso_serial *serial; | |
1392 | unsigned char *port_req; | |
1393 | int status = urb->status; | |
1394 | int i; | |
1395 | ||
1396 | usb_mark_last_busy(urb->dev); | |
1397 | ||
1398 | /* sanity check */ | |
1399 | if (!shared_int) | |
1400 | return; | |
1401 | ||
1402 | /* status check */ | |
1403 | if (status) { | |
1404 | log_usb_status(status, __func__); | |
1405 | return; | |
1406 | } | |
1407 | D4("\n--- Got intr callback 0x%02X ---", status); | |
1408 | ||
1409 | /* what request? */ | |
1410 | port_req = urb->transfer_buffer; | |
1411 | D4(" port_req = 0x%.2X\n", *port_req); | |
1412 | /* loop over all muxed ports to find the one sending this */ | |
1413 | for (i = 0; i < 8; i++) { | |
1414 | /* max 8 channels on MUX */ | |
1415 | if (*port_req & (1 << i)) { | |
1416 | serial = get_serial_by_shared_int_and_type(shared_int, | |
1417 | (1 << i)); | |
1418 | if (serial != NULL) { | |
1419 | D1("Pending read interrupt on port %d\n", i); | |
1420 | if (!test_and_set_bit(HSO_SERIAL_FLAG_RX_SENT, | |
1421 | &serial->flags)) { | |
1422 | /* Setup and send a ctrl req read on | |
1423 | * port i */ | |
1424 | hso_mux_serial_read(serial); | |
1425 | } else { | |
1426 | D1("Already pending a read on " | |
1427 | "port %d\n", i); | |
1428 | } | |
1429 | } | |
1430 | } | |
1431 | } | |
1432 | /* Resubmit interrupt urb */ | |
1433 | hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); | |
1434 | } | |
1435 | ||
1436 | /* called for writing to muxed serial port */ | |
1437 | static int hso_mux_serial_write_data(struct hso_serial *serial) | |
1438 | { | |
1439 | if (NULL == serial) | |
1440 | return -EINVAL; | |
1441 | ||
1442 | return mux_device_request(serial, | |
1443 | USB_CDC_SEND_ENCAPSULATED_COMMAND, | |
1444 | serial->parent->port_spec & HSO_PORT_MASK, | |
1445 | serial->tx_urb, | |
1446 | &serial->ctrl_req_tx, | |
1447 | serial->tx_data, serial->tx_data_count); | |
1448 | } | |
1449 | ||
1450 | /* write callback for Diag and CS port */ | |
1451 | static void hso_std_serial_write_bulk_callback(struct urb *urb) | |
1452 | { | |
1453 | struct hso_serial *serial = urb->context; | |
1454 | int status = urb->status; | |
1455 | ||
1456 | /* sanity check */ | |
1457 | if (!serial) { | |
1458 | D1("serial == NULL"); | |
1459 | return; | |
1460 | } | |
1461 | ||
1462 | spin_lock(&serial->serial_lock); | |
1463 | serial->tx_urb_used = 0; | |
1464 | spin_unlock(&serial->serial_lock); | |
1465 | if (status) { | |
1466 | log_usb_status(status, __func__); | |
1467 | return; | |
1468 | } | |
1469 | hso_put_activity(serial->parent); | |
add477df OB |
1470 | if (serial->tty) |
1471 | tty_wakeup(serial->tty); | |
72dc1c09 GKH |
1472 | hso_kick_transmit(serial); |
1473 | ||
1474 | D1(" "); | |
1475 | return; | |
1476 | } | |
1477 | ||
1478 | /* called for writing diag or CS serial port */ | |
1479 | static int hso_std_serial_write_data(struct hso_serial *serial) | |
1480 | { | |
1481 | int count = serial->tx_data_count; | |
1482 | int result; | |
1483 | ||
1484 | usb_fill_bulk_urb(serial->tx_urb, | |
1485 | serial->parent->usb, | |
1486 | usb_sndbulkpipe(serial->parent->usb, | |
1487 | serial->out_endp-> | |
1488 | bEndpointAddress & 0x7F), | |
1489 | serial->tx_data, serial->tx_data_count, | |
1490 | hso_std_serial_write_bulk_callback, serial); | |
1491 | ||
1492 | result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); | |
1493 | if (result) { | |
1494 | dev_warn(&serial->parent->usb->dev, | |
1495 | "Failed to submit urb - res %d\n", result); | |
1496 | return result; | |
1497 | } | |
1498 | ||
1499 | return count; | |
1500 | } | |
1501 | ||
1502 | /* callback after read or write on muxed serial port */ | |
1503 | static void ctrl_callback(struct urb *urb) | |
1504 | { | |
1505 | struct hso_serial *serial = urb->context; | |
1506 | struct usb_ctrlrequest *req; | |
1507 | int status = urb->status; | |
1508 | ||
1509 | /* sanity check */ | |
1510 | if (!serial) | |
1511 | return; | |
1512 | ||
1513 | spin_lock(&serial->serial_lock); | |
1514 | serial->tx_urb_used = 0; | |
1515 | spin_unlock(&serial->serial_lock); | |
1516 | if (status) { | |
1517 | log_usb_status(status, __func__); | |
1518 | return; | |
1519 | } | |
1520 | ||
1521 | /* what request? */ | |
1522 | req = (struct usb_ctrlrequest *)(urb->setup_packet); | |
1523 | D4("\n--- Got muxed ctrl callback 0x%02X ---", status); | |
1524 | D4("Actual length of urb = %d\n", urb->actual_length); | |
1525 | DUMP1(urb->transfer_buffer, urb->actual_length); | |
1526 | ||
1527 | if (req->bRequestType == | |
1528 | (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { | |
1529 | /* response to a read command */ | |
1530 | if (serial->open_count > 0) { | |
1531 | /* handle RX data the normal way */ | |
1532 | put_rxbuf_data(urb, serial); | |
1533 | } | |
1534 | ||
1535 | /* Re issue a read as long as we receive data. */ | |
1536 | if (urb->actual_length != 0) | |
1537 | hso_mux_serial_read(serial); | |
1538 | else | |
1539 | clear_bit(HSO_SERIAL_FLAG_RX_SENT, &serial->flags); | |
1540 | } else { | |
1541 | hso_put_activity(serial->parent); | |
add477df OB |
1542 | if (serial->tty) |
1543 | tty_wakeup(serial->tty); | |
72dc1c09 GKH |
1544 | /* response to a write command */ |
1545 | hso_kick_transmit(serial); | |
1546 | } | |
1547 | } | |
1548 | ||
1549 | /* handle RX data for serial port */ | |
1550 | static void put_rxbuf_data(struct urb *urb, struct hso_serial *serial) | |
1551 | { | |
1552 | struct tty_struct *tty = serial->tty; | |
1553 | ||
1554 | /* Sanity check */ | |
1555 | if (urb == NULL || serial == NULL) { | |
1556 | D1("serial = NULL"); | |
1557 | return; | |
1558 | } | |
1559 | ||
1560 | /* Push data to tty */ | |
1561 | if (tty && urb->actual_length) { | |
1562 | D1("data to push to tty"); | |
1563 | tty_insert_flip_string(tty, urb->transfer_buffer, | |
1564 | urb->actual_length); | |
1565 | tty_flip_buffer_push(tty); | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | /* read callback for Diag and CS port */ | |
1570 | static void hso_std_serial_read_bulk_callback(struct urb *urb) | |
1571 | { | |
1572 | struct hso_serial *serial = urb->context; | |
1573 | int result; | |
1574 | int status = urb->status; | |
1575 | ||
1576 | /* sanity check */ | |
1577 | if (!serial) { | |
1578 | D1("serial == NULL"); | |
1579 | return; | |
1580 | } else if (status) { | |
1581 | log_usb_status(status, __func__); | |
1582 | return; | |
1583 | } | |
1584 | ||
1585 | D4("\n--- Got serial_read_bulk callback %02x ---", status); | |
1586 | D1("Actual length = %d\n", urb->actual_length); | |
1587 | DUMP1(urb->transfer_buffer, urb->actual_length); | |
1588 | ||
1589 | /* Anyone listening? */ | |
1590 | if (serial->open_count == 0) | |
1591 | return; | |
1592 | ||
1593 | if (status == 0) { | |
1594 | if (serial->parent->port_spec & HSO_INFO_CRC_BUG) { | |
1595 | u32 rest; | |
1596 | u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; | |
1597 | rest = | |
1598 | urb->actual_length % | |
1599 | serial->in_endp->wMaxPacketSize; | |
1600 | if (((rest == 5) || (rest == 6)) | |
1601 | && !memcmp(((u8 *) urb->transfer_buffer) + | |
1602 | urb->actual_length - 4, crc_check, 4)) { | |
1603 | urb->actual_length -= 4; | |
1604 | } | |
1605 | } | |
1606 | /* Valid data, handle RX data */ | |
1607 | put_rxbuf_data(urb, serial); | |
1608 | } else if (status == -ENOENT || status == -ECONNRESET) { | |
1609 | /* Unlinked - check for throttled port. */ | |
1610 | D2("Port %d, successfully unlinked urb", serial->minor); | |
1611 | } else { | |
1612 | D2("Port %d, status = %d for read urb", serial->minor, status); | |
1613 | return; | |
1614 | } | |
1615 | ||
1616 | usb_mark_last_busy(urb->dev); | |
1617 | ||
1618 | /* We are done with this URB, resubmit it. Prep the USB to wait for | |
1619 | * another frame */ | |
1620 | usb_fill_bulk_urb(urb, serial->parent->usb, | |
1621 | usb_rcvbulkpipe(serial->parent->usb, | |
1622 | serial->in_endp-> | |
1623 | bEndpointAddress & 0x7F), | |
1624 | urb->transfer_buffer, serial->rx_data_length, | |
1625 | hso_std_serial_read_bulk_callback, serial); | |
1626 | /* Give this to the USB subsystem so it can tell us when more data | |
1627 | * arrives. */ | |
1628 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
1629 | if (result) { | |
1630 | dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d", | |
1631 | __func__, result); | |
1632 | } | |
1633 | } | |
1634 | ||
1635 | /* Base driver functions */ | |
1636 | ||
1637 | static void hso_log_port(struct hso_device *hso_dev) | |
1638 | { | |
1639 | char *port_type; | |
1640 | char port_dev[20]; | |
1641 | ||
1642 | switch (hso_dev->port_spec & HSO_PORT_MASK) { | |
1643 | case HSO_PORT_CONTROL: | |
1644 | port_type = "Control"; | |
1645 | break; | |
1646 | case HSO_PORT_APP: | |
1647 | port_type = "Application"; | |
1648 | break; | |
1649 | case HSO_PORT_GPS: | |
1650 | port_type = "GPS"; | |
1651 | break; | |
1652 | case HSO_PORT_GPS_CONTROL: | |
1653 | port_type = "GPS control"; | |
1654 | break; | |
1655 | case HSO_PORT_APP2: | |
1656 | port_type = "Application2"; | |
1657 | break; | |
1658 | case HSO_PORT_PCSC: | |
1659 | port_type = "PCSC"; | |
1660 | break; | |
1661 | case HSO_PORT_DIAG: | |
1662 | port_type = "Diagnostic"; | |
1663 | break; | |
1664 | case HSO_PORT_DIAG2: | |
1665 | port_type = "Diagnostic2"; | |
1666 | break; | |
1667 | case HSO_PORT_MODEM: | |
1668 | port_type = "Modem"; | |
1669 | break; | |
1670 | case HSO_PORT_NETWORK: | |
1671 | port_type = "Network"; | |
1672 | break; | |
1673 | default: | |
1674 | port_type = "Unknown"; | |
1675 | break; | |
1676 | } | |
1677 | if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { | |
1678 | sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); | |
1679 | } else | |
1680 | sprintf(port_dev, "/dev/%s%d", tty_filename, | |
1681 | dev2ser(hso_dev)->minor); | |
1682 | ||
1683 | dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", | |
1684 | port_type, port_dev); | |
1685 | } | |
1686 | ||
1687 | static int hso_start_net_device(struct hso_device *hso_dev) | |
1688 | { | |
1689 | int i, result = 0; | |
1690 | struct hso_net *hso_net = dev2net(hso_dev); | |
1691 | ||
1692 | if (!hso_net) | |
1693 | return -ENODEV; | |
1694 | ||
1695 | /* send URBs for all read buffers */ | |
1696 | for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { | |
1697 | ||
1698 | /* Prep a receive URB */ | |
1699 | usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], | |
1700 | hso_dev->usb, | |
1701 | usb_rcvbulkpipe(hso_dev->usb, | |
1702 | hso_net->in_endp-> | |
1703 | bEndpointAddress & 0x7F), | |
1704 | hso_net->mux_bulk_rx_buf_pool[i], | |
1705 | MUX_BULK_RX_BUF_SIZE, read_bulk_callback, | |
1706 | hso_net); | |
1707 | ||
1708 | /* Put it out there so the device can send us stuff */ | |
1709 | result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], | |
1710 | GFP_NOIO); | |
1711 | if (result) | |
1712 | dev_warn(&hso_dev->usb->dev, | |
1713 | "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, | |
1714 | i, result); | |
1715 | } | |
1716 | ||
1717 | return result; | |
1718 | } | |
1719 | ||
1720 | static int hso_stop_net_device(struct hso_device *hso_dev) | |
1721 | { | |
1722 | int i; | |
1723 | struct hso_net *hso_net = dev2net(hso_dev); | |
1724 | ||
1725 | if (!hso_net) | |
1726 | return -ENODEV; | |
1727 | ||
1728 | for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { | |
1729 | if (hso_net->mux_bulk_rx_urb_pool[i]) | |
1730 | usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); | |
1731 | ||
1732 | } | |
1733 | if (hso_net->mux_bulk_tx_urb) | |
1734 | usb_kill_urb(hso_net->mux_bulk_tx_urb); | |
1735 | ||
1736 | return 0; | |
1737 | } | |
1738 | ||
1739 | static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) | |
1740 | { | |
1741 | int i, result = 0; | |
1742 | struct hso_serial *serial = dev2ser(hso_dev); | |
1743 | ||
1744 | if (!serial) | |
1745 | return -ENODEV; | |
1746 | ||
1747 | /* If it is not the MUX port fill in and submit a bulk urb (already | |
1748 | * allocated in hso_serial_start) */ | |
1749 | if (!(serial->parent->port_spec & HSO_INTF_MUX)) { | |
1750 | for (i = 0; i < serial->num_rx_urbs; i++) { | |
1751 | usb_fill_bulk_urb(serial->rx_urb[i], | |
1752 | serial->parent->usb, | |
1753 | usb_rcvbulkpipe(serial->parent->usb, | |
1754 | serial->in_endp-> | |
1755 | bEndpointAddress & | |
1756 | 0x7F), | |
1757 | serial->rx_data[i], | |
1758 | serial->rx_data_length, | |
1759 | hso_std_serial_read_bulk_callback, | |
1760 | serial); | |
1761 | result = usb_submit_urb(serial->rx_urb[i], flags); | |
1762 | if (result) { | |
1763 | dev_warn(&serial->parent->usb->dev, | |
1764 | "Failed to submit urb - res %d\n", | |
1765 | result); | |
1766 | break; | |
1767 | } | |
1768 | } | |
1769 | } else { | |
1770 | mutex_lock(&serial->shared_int->shared_int_lock); | |
1771 | if (!serial->shared_int->use_count) { | |
1772 | result = | |
1773 | hso_mux_submit_intr_urb(serial->shared_int, | |
1774 | hso_dev->usb, flags); | |
1775 | } | |
1776 | serial->shared_int->use_count++; | |
1777 | mutex_unlock(&serial->shared_int->shared_int_lock); | |
1778 | } | |
1779 | ||
1780 | return result; | |
1781 | } | |
1782 | ||
1783 | static int hso_stop_serial_device(struct hso_device *hso_dev) | |
1784 | { | |
1785 | int i; | |
1786 | struct hso_serial *serial = dev2ser(hso_dev); | |
1787 | ||
1788 | if (!serial) | |
1789 | return -ENODEV; | |
1790 | ||
1791 | for (i = 0; i < serial->num_rx_urbs; i++) { | |
1792 | if (serial->rx_urb[i]) | |
1793 | usb_kill_urb(serial->rx_urb[i]); | |
1794 | } | |
1795 | ||
1796 | if (serial->tx_urb) | |
1797 | usb_kill_urb(serial->tx_urb); | |
1798 | ||
1799 | if (serial->shared_int) { | |
1800 | mutex_lock(&serial->shared_int->shared_int_lock); | |
1801 | if (serial->shared_int->use_count && | |
1802 | (--serial->shared_int->use_count == 0)) { | |
1803 | struct urb *urb; | |
1804 | ||
1805 | urb = serial->shared_int->shared_intr_urb; | |
1806 | if (urb) | |
1807 | usb_kill_urb(urb); | |
1808 | } | |
1809 | mutex_unlock(&serial->shared_int->shared_int_lock); | |
1810 | } | |
1811 | ||
1812 | return 0; | |
1813 | } | |
1814 | ||
1815 | static void hso_serial_common_free(struct hso_serial *serial) | |
1816 | { | |
1817 | int i; | |
1818 | ||
1819 | if (serial->parent->dev) | |
1820 | device_remove_file(serial->parent->dev, &dev_attr_hsotype); | |
1821 | ||
1822 | tty_unregister_device(tty_drv, serial->minor); | |
1823 | ||
1824 | for (i = 0; i < serial->num_rx_urbs; i++) { | |
1825 | /* unlink and free RX URB */ | |
1826 | usb_free_urb(serial->rx_urb[i]); | |
1827 | /* free the RX buffer */ | |
1828 | kfree(serial->rx_data[i]); | |
1829 | } | |
1830 | ||
1831 | /* unlink and free TX URB */ | |
1832 | usb_free_urb(serial->tx_urb); | |
1833 | kfree(serial->tx_data); | |
1834 | } | |
1835 | ||
1836 | static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, | |
1837 | int rx_size, int tx_size) | |
1838 | { | |
1839 | struct device *dev; | |
1840 | int minor; | |
1841 | int i; | |
1842 | ||
1843 | minor = get_free_serial_index(); | |
1844 | if (minor < 0) | |
1845 | goto exit; | |
1846 | ||
1847 | /* register our minor number */ | |
1848 | serial->parent->dev = tty_register_device(tty_drv, minor, | |
1849 | &serial->parent->interface->dev); | |
1850 | dev = serial->parent->dev; | |
1851 | dev->driver_data = serial->parent; | |
1852 | i = device_create_file(dev, &dev_attr_hsotype); | |
1853 | ||
1854 | /* fill in specific data for later use */ | |
1855 | serial->minor = minor; | |
1856 | serial->magic = HSO_SERIAL_MAGIC; | |
1857 | spin_lock_init(&serial->serial_lock); | |
1858 | serial->num_rx_urbs = num_urbs; | |
1859 | ||
1860 | /* RX, allocate urb and initialize */ | |
1861 | ||
1862 | /* prepare our RX buffer */ | |
1863 | serial->rx_data_length = rx_size; | |
1864 | for (i = 0; i < serial->num_rx_urbs; i++) { | |
1865 | serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); | |
1866 | if (!serial->rx_urb[i]) { | |
1867 | dev_err(dev, "Could not allocate urb?\n"); | |
1868 | goto exit; | |
1869 | } | |
1870 | serial->rx_urb[i]->transfer_buffer = NULL; | |
1871 | serial->rx_urb[i]->transfer_buffer_length = 0; | |
1872 | serial->rx_data[i] = kzalloc(serial->rx_data_length, | |
1873 | GFP_KERNEL); | |
1874 | if (!serial->rx_data[i]) { | |
1875 | dev_err(dev, "%s - Out of memory\n", __func__); | |
1876 | goto exit; | |
1877 | } | |
1878 | } | |
1879 | ||
1880 | /* TX, allocate urb and initialize */ | |
1881 | serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); | |
1882 | if (!serial->tx_urb) { | |
1883 | dev_err(dev, "Could not allocate urb?\n"); | |
1884 | goto exit; | |
1885 | } | |
1886 | serial->tx_urb->transfer_buffer = NULL; | |
1887 | serial->tx_urb->transfer_buffer_length = 0; | |
1888 | /* prepare our TX buffer */ | |
1889 | serial->tx_data_count = 0; | |
1890 | serial->tx_buffer_count = 0; | |
1891 | serial->tx_data_length = tx_size; | |
1892 | serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); | |
1893 | if (!serial->tx_data) { | |
1894 | dev_err(dev, "%s - Out of memory", __func__); | |
1895 | goto exit; | |
1896 | } | |
1897 | serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); | |
1898 | if (!serial->tx_buffer) { | |
1899 | dev_err(dev, "%s - Out of memory", __func__); | |
1900 | goto exit; | |
1901 | } | |
1902 | ||
1903 | return 0; | |
1904 | exit: | |
1905 | hso_serial_common_free(serial); | |
1906 | return -1; | |
1907 | } | |
1908 | ||
1909 | /* Frees a general hso device */ | |
1910 | static void hso_free_device(struct hso_device *hso_dev) | |
1911 | { | |
1912 | kfree(hso_dev); | |
1913 | } | |
1914 | ||
1915 | /* Creates a general hso device */ | |
1916 | static struct hso_device *hso_create_device(struct usb_interface *intf, | |
1917 | int port_spec) | |
1918 | { | |
1919 | struct hso_device *hso_dev; | |
1920 | ||
1921 | hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); | |
1922 | if (!hso_dev) | |
1923 | return NULL; | |
1924 | ||
1925 | hso_dev->port_spec = port_spec; | |
1926 | hso_dev->usb = interface_to_usbdev(intf); | |
1927 | hso_dev->interface = intf; | |
1928 | kref_init(&hso_dev->ref); | |
1929 | mutex_init(&hso_dev->mutex); | |
1930 | ||
1931 | INIT_WORK(&hso_dev->async_get_intf, async_get_intf); | |
1932 | INIT_WORK(&hso_dev->async_put_intf, async_put_intf); | |
1933 | ||
1934 | return hso_dev; | |
1935 | } | |
1936 | ||
1937 | /* Removes a network device in the network device table */ | |
1938 | static int remove_net_device(struct hso_device *hso_dev) | |
1939 | { | |
1940 | int i; | |
1941 | ||
1942 | for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { | |
1943 | if (network_table[i] == hso_dev) { | |
1944 | network_table[i] = NULL; | |
1945 | break; | |
1946 | } | |
1947 | } | |
1948 | if (i == HSO_MAX_NET_DEVICES) | |
1949 | return -1; | |
1950 | return 0; | |
1951 | } | |
1952 | ||
1953 | /* Frees our network device */ | |
1954 | static void hso_free_net_device(struct hso_device *hso_dev) | |
1955 | { | |
1956 | int i; | |
1957 | struct hso_net *hso_net = dev2net(hso_dev); | |
1958 | ||
1959 | if (!hso_net) | |
1960 | return; | |
1961 | ||
1962 | /* start freeing */ | |
1963 | for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { | |
1964 | usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); | |
1965 | kfree(hso_net->mux_bulk_rx_buf_pool[i]); | |
1966 | } | |
1967 | usb_free_urb(hso_net->mux_bulk_tx_urb); | |
1968 | kfree(hso_net->mux_bulk_tx_buf); | |
1969 | ||
1970 | remove_net_device(hso_net->parent); | |
1971 | ||
1972 | if (hso_net->net) { | |
1973 | unregister_netdev(hso_net->net); | |
1974 | free_netdev(hso_net->net); | |
1975 | } | |
1976 | ||
1977 | hso_free_device(hso_dev); | |
1978 | } | |
1979 | ||
1980 | /* initialize the network interface */ | |
1981 | static void hso_net_init(struct net_device *net) | |
1982 | { | |
1983 | struct hso_net *hso_net = netdev_priv(net); | |
1984 | ||
1985 | D1("sizeof hso_net is %d", (int)sizeof(*hso_net)); | |
1986 | ||
1987 | /* fill in the other fields */ | |
1988 | net->open = hso_net_open; | |
1989 | net->stop = hso_net_close; | |
1990 | net->hard_start_xmit = hso_net_start_xmit; | |
1991 | net->tx_timeout = hso_net_tx_timeout; | |
1992 | net->watchdog_timeo = HSO_NET_TX_TIMEOUT; | |
1993 | net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; | |
1994 | net->type = ARPHRD_NONE; | |
1995 | net->mtu = DEFAULT_MTU - 14; | |
1996 | net->tx_queue_len = 10; | |
1997 | SET_ETHTOOL_OPS(net, &ops); | |
1998 | ||
1999 | /* and initialize the semaphore */ | |
2000 | spin_lock_init(&hso_net->net_lock); | |
2001 | } | |
2002 | ||
2003 | /* Adds a network device in the network device table */ | |
2004 | static int add_net_device(struct hso_device *hso_dev) | |
2005 | { | |
2006 | int i; | |
2007 | ||
2008 | for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { | |
2009 | if (network_table[i] == NULL) { | |
2010 | network_table[i] = hso_dev; | |
2011 | break; | |
2012 | } | |
2013 | } | |
2014 | if (i == HSO_MAX_NET_DEVICES) | |
2015 | return -1; | |
2016 | return 0; | |
2017 | } | |
2018 | ||
2019 | static int hso_radio_toggle(void *data, enum rfkill_state state) | |
2020 | { | |
2021 | struct hso_device *hso_dev = data; | |
2022 | int enabled = (state == RFKILL_STATE_ON); | |
2023 | int rv; | |
2024 | ||
2025 | mutex_lock(&hso_dev->mutex); | |
2026 | if (hso_dev->usb_gone) | |
2027 | rv = 0; | |
2028 | else | |
2029 | rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), | |
2030 | enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, | |
2031 | USB_CTRL_SET_TIMEOUT); | |
2032 | mutex_unlock(&hso_dev->mutex); | |
2033 | return rv; | |
2034 | } | |
2035 | ||
2036 | /* Creates and sets up everything for rfkill */ | |
2037 | static void hso_create_rfkill(struct hso_device *hso_dev, | |
2038 | struct usb_interface *interface) | |
2039 | { | |
2040 | struct hso_net *hso_net = dev2net(hso_dev); | |
2041 | struct device *dev = hso_dev->dev; | |
2042 | char *rfkn; | |
2043 | ||
2044 | hso_net->rfkill = rfkill_allocate(&interface_to_usbdev(interface)->dev, | |
2045 | RFKILL_TYPE_WLAN); | |
2046 | if (!hso_net->rfkill) { | |
2047 | dev_err(dev, "%s - Out of memory", __func__); | |
2048 | return; | |
2049 | } | |
2050 | rfkn = kzalloc(20, GFP_KERNEL); | |
2051 | if (!rfkn) { | |
2052 | rfkill_free(hso_net->rfkill); | |
2053 | dev_err(dev, "%s - Out of memory", __func__); | |
2054 | return; | |
2055 | } | |
2056 | snprintf(rfkn, 20, "hso-%d", | |
2057 | interface->altsetting->desc.bInterfaceNumber); | |
2058 | hso_net->rfkill->name = rfkn; | |
2059 | hso_net->rfkill->state = RFKILL_STATE_ON; | |
2060 | hso_net->rfkill->data = hso_dev; | |
2061 | hso_net->rfkill->toggle_radio = hso_radio_toggle; | |
2062 | if (rfkill_register(hso_net->rfkill) < 0) { | |
2063 | kfree(rfkn); | |
2064 | hso_net->rfkill->name = NULL; | |
2065 | rfkill_free(hso_net->rfkill); | |
2066 | dev_err(dev, "%s - Failed to register rfkill", __func__); | |
2067 | return; | |
2068 | } | |
2069 | } | |
2070 | ||
2071 | /* Creates our network device */ | |
2072 | static struct hso_device *hso_create_net_device(struct usb_interface *interface) | |
2073 | { | |
2074 | int result, i; | |
2075 | struct net_device *net; | |
2076 | struct hso_net *hso_net; | |
2077 | struct hso_device *hso_dev; | |
2078 | ||
2079 | hso_dev = hso_create_device(interface, HSO_INTF_MUX | HSO_PORT_NETWORK); | |
2080 | if (!hso_dev) | |
2081 | return NULL; | |
2082 | ||
2083 | /* allocate our network device, then we can put in our private data */ | |
2084 | /* call hso_net_init to do the basic initialization */ | |
2085 | net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init); | |
2086 | if (!net) { | |
2087 | dev_err(&interface->dev, "Unable to create ethernet device\n"); | |
2088 | goto exit; | |
2089 | } | |
2090 | ||
2091 | hso_net = netdev_priv(net); | |
2092 | ||
2093 | hso_dev->port_data.dev_net = hso_net; | |
2094 | hso_net->net = net; | |
2095 | hso_net->parent = hso_dev; | |
2096 | ||
2097 | hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, | |
2098 | USB_DIR_IN); | |
2099 | if (!hso_net->in_endp) { | |
2100 | dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); | |
2101 | goto exit; | |
2102 | } | |
2103 | hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, | |
2104 | USB_DIR_OUT); | |
2105 | if (!hso_net->out_endp) { | |
2106 | dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); | |
2107 | goto exit; | |
2108 | } | |
2109 | SET_NETDEV_DEV(net, &interface->dev); | |
2110 | ||
2111 | /* registering our net device */ | |
2112 | result = register_netdev(net); | |
2113 | if (result) { | |
2114 | dev_err(&interface->dev, "Failed to register device\n"); | |
2115 | goto exit; | |
2116 | } | |
2117 | ||
2118 | /* start allocating */ | |
2119 | for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { | |
2120 | hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); | |
2121 | if (!hso_net->mux_bulk_rx_urb_pool[i]) { | |
2122 | dev_err(&interface->dev, "Could not allocate rx urb\n"); | |
2123 | goto exit; | |
2124 | } | |
2125 | hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, | |
2126 | GFP_KERNEL); | |
2127 | if (!hso_net->mux_bulk_rx_buf_pool[i]) { | |
2128 | dev_err(&interface->dev, "Could not allocate rx buf\n"); | |
2129 | goto exit; | |
2130 | } | |
2131 | } | |
2132 | hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); | |
2133 | if (!hso_net->mux_bulk_tx_urb) { | |
2134 | dev_err(&interface->dev, "Could not allocate tx urb\n"); | |
2135 | goto exit; | |
2136 | } | |
2137 | hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); | |
2138 | if (!hso_net->mux_bulk_tx_buf) { | |
2139 | dev_err(&interface->dev, "Could not allocate tx buf\n"); | |
2140 | goto exit; | |
2141 | } | |
2142 | ||
2143 | add_net_device(hso_dev); | |
2144 | ||
2145 | hso_log_port(hso_dev); | |
2146 | ||
2147 | hso_create_rfkill(hso_dev, interface); | |
2148 | ||
2149 | return hso_dev; | |
2150 | exit: | |
2151 | hso_free_net_device(hso_dev); | |
2152 | return NULL; | |
2153 | } | |
2154 | ||
2155 | /* Frees an AT channel ( goes for both mux and non-mux ) */ | |
2156 | static void hso_free_serial_device(struct hso_device *hso_dev) | |
2157 | { | |
2158 | struct hso_serial *serial = dev2ser(hso_dev); | |
2159 | ||
2160 | if (!serial) | |
2161 | return; | |
2162 | set_serial_by_index(serial->minor, NULL); | |
2163 | ||
2164 | hso_serial_common_free(serial); | |
2165 | ||
2166 | if (serial->shared_int) { | |
2167 | mutex_lock(&serial->shared_int->shared_int_lock); | |
2168 | if (--serial->shared_int->ref_count == 0) | |
2169 | hso_free_shared_int(serial->shared_int); | |
2170 | else | |
2171 | mutex_unlock(&serial->shared_int->shared_int_lock); | |
2172 | } | |
2173 | kfree(serial); | |
2174 | hso_free_device(hso_dev); | |
2175 | } | |
2176 | ||
2177 | /* Creates a bulk AT channel */ | |
2178 | static struct hso_device *hso_create_bulk_serial_device( | |
2179 | struct usb_interface *interface, int port) | |
2180 | { | |
2181 | struct hso_device *hso_dev; | |
2182 | struct hso_serial *serial; | |
2183 | int num_urbs; | |
2184 | ||
2185 | hso_dev = hso_create_device(interface, port); | |
2186 | if (!hso_dev) | |
2187 | return NULL; | |
2188 | ||
2189 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); | |
2190 | if (!serial) | |
2191 | goto exit; | |
2192 | ||
2193 | serial->parent = hso_dev; | |
2194 | hso_dev->port_data.dev_serial = serial; | |
2195 | ||
2196 | if (port & HSO_PORT_MODEM) | |
2197 | num_urbs = 2; | |
2198 | else | |
2199 | num_urbs = 1; | |
2200 | ||
2201 | if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, | |
2202 | BULK_URB_TX_SIZE)) | |
2203 | goto exit; | |
2204 | ||
2205 | serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, | |
2206 | USB_DIR_IN); | |
2207 | if (!serial->in_endp) { | |
2208 | dev_err(&interface->dev, "Failed to find BULK IN ep\n"); | |
2209 | goto exit; | |
2210 | } | |
2211 | ||
2212 | if (! | |
2213 | (serial->out_endp = | |
2214 | hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { | |
2215 | dev_err(&interface->dev, "Failed to find BULK IN ep\n"); | |
2216 | goto exit; | |
2217 | } | |
2218 | ||
2219 | serial->write_data = hso_std_serial_write_data; | |
2220 | ||
2221 | /* and record this serial */ | |
2222 | set_serial_by_index(serial->minor, serial); | |
2223 | ||
2224 | /* setup the proc dirs and files if needed */ | |
2225 | hso_log_port(hso_dev); | |
2226 | ||
2227 | /* done, return it */ | |
2228 | return hso_dev; | |
2229 | exit: | |
2230 | if (hso_dev && serial) | |
2231 | hso_serial_common_free(serial); | |
2232 | kfree(serial); | |
2233 | hso_free_device(hso_dev); | |
2234 | return NULL; | |
2235 | } | |
2236 | ||
2237 | /* Creates a multiplexed AT channel */ | |
2238 | static | |
2239 | struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, | |
2240 | int port, | |
2241 | struct hso_shared_int *mux) | |
2242 | { | |
2243 | struct hso_device *hso_dev; | |
2244 | struct hso_serial *serial; | |
2245 | int port_spec; | |
2246 | ||
2247 | port_spec = HSO_INTF_MUX; | |
2248 | port_spec &= ~HSO_PORT_MASK; | |
2249 | ||
2250 | port_spec |= hso_mux_to_port(port); | |
2251 | if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) | |
2252 | return NULL; | |
2253 | ||
2254 | hso_dev = hso_create_device(interface, port_spec); | |
2255 | if (!hso_dev) | |
2256 | return NULL; | |
2257 | ||
2258 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); | |
2259 | if (!serial) | |
2260 | goto exit; | |
2261 | ||
2262 | hso_dev->port_data.dev_serial = serial; | |
2263 | serial->parent = hso_dev; | |
2264 | ||
2265 | if (hso_serial_common_create | |
2266 | (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) | |
2267 | goto exit; | |
2268 | ||
2269 | serial->tx_data_length--; | |
2270 | serial->write_data = hso_mux_serial_write_data; | |
2271 | ||
2272 | serial->shared_int = mux; | |
2273 | mutex_lock(&serial->shared_int->shared_int_lock); | |
2274 | serial->shared_int->ref_count++; | |
2275 | mutex_unlock(&serial->shared_int->shared_int_lock); | |
2276 | ||
2277 | /* and record this serial */ | |
2278 | set_serial_by_index(serial->minor, serial); | |
2279 | ||
2280 | /* setup the proc dirs and files if needed */ | |
2281 | hso_log_port(hso_dev); | |
2282 | ||
2283 | /* done, return it */ | |
2284 | return hso_dev; | |
2285 | ||
2286 | exit: | |
2287 | if (serial) { | |
2288 | tty_unregister_device(tty_drv, serial->minor); | |
2289 | kfree(serial); | |
2290 | } | |
2291 | if (hso_dev) | |
2292 | hso_free_device(hso_dev); | |
2293 | return NULL; | |
2294 | ||
2295 | } | |
2296 | ||
2297 | static void hso_free_shared_int(struct hso_shared_int *mux) | |
2298 | { | |
2299 | usb_free_urb(mux->shared_intr_urb); | |
2300 | kfree(mux->shared_intr_buf); | |
2301 | mutex_unlock(&mux->shared_int_lock); | |
2302 | kfree(mux); | |
2303 | } | |
2304 | ||
2305 | static | |
2306 | struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) | |
2307 | { | |
2308 | struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); | |
2309 | ||
2310 | if (!mux) | |
2311 | return NULL; | |
2312 | ||
2313 | mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, | |
2314 | USB_DIR_IN); | |
2315 | if (!mux->intr_endp) { | |
2316 | dev_err(&interface->dev, "Can't find INT IN endpoint\n"); | |
2317 | goto exit; | |
2318 | } | |
2319 | ||
2320 | mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); | |
2321 | if (!mux->shared_intr_urb) { | |
2322 | dev_err(&interface->dev, "Could not allocate intr urb?"); | |
2323 | goto exit; | |
2324 | } | |
2325 | mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize, | |
2326 | GFP_KERNEL); | |
2327 | if (!mux->shared_intr_buf) { | |
2328 | dev_err(&interface->dev, "Could not allocate intr buf?"); | |
2329 | goto exit; | |
2330 | } | |
2331 | ||
2332 | mutex_init(&mux->shared_int_lock); | |
2333 | ||
2334 | return mux; | |
2335 | ||
2336 | exit: | |
2337 | kfree(mux->shared_intr_buf); | |
2338 | usb_free_urb(mux->shared_intr_urb); | |
2339 | kfree(mux); | |
2340 | return NULL; | |
2341 | } | |
2342 | ||
2343 | /* Gets the port spec for a certain interface */ | |
2344 | static int hso_get_config_data(struct usb_interface *interface) | |
2345 | { | |
2346 | struct usb_device *usbdev = interface_to_usbdev(interface); | |
2347 | u8 config_data[17]; | |
2348 | u32 if_num = interface->altsetting->desc.bInterfaceNumber; | |
2349 | s32 result; | |
2350 | ||
2351 | if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), | |
2352 | 0x86, 0xC0, 0, 0, config_data, 17, | |
2353 | USB_CTRL_SET_TIMEOUT) != 0x11) { | |
2354 | return -EIO; | |
2355 | } | |
2356 | ||
2357 | switch (config_data[if_num]) { | |
2358 | case 0x0: | |
2359 | result = 0; | |
2360 | break; | |
2361 | case 0x1: | |
2362 | result = HSO_PORT_DIAG; | |
2363 | break; | |
2364 | case 0x2: | |
2365 | result = HSO_PORT_GPS; | |
2366 | break; | |
2367 | case 0x3: | |
2368 | result = HSO_PORT_GPS_CONTROL; | |
2369 | break; | |
2370 | case 0x4: | |
2371 | result = HSO_PORT_APP; | |
2372 | break; | |
2373 | case 0x5: | |
2374 | result = HSO_PORT_APP2; | |
2375 | break; | |
2376 | case 0x6: | |
2377 | result = HSO_PORT_CONTROL; | |
2378 | break; | |
2379 | case 0x7: | |
2380 | result = HSO_PORT_NETWORK; | |
2381 | break; | |
2382 | case 0x8: | |
2383 | result = HSO_PORT_MODEM; | |
2384 | break; | |
2385 | case 0x9: | |
2386 | result = HSO_PORT_MSD; | |
2387 | break; | |
2388 | case 0xa: | |
2389 | result = HSO_PORT_PCSC; | |
2390 | break; | |
2391 | case 0xb: | |
2392 | result = HSO_PORT_VOICE; | |
2393 | break; | |
2394 | default: | |
2395 | result = 0; | |
2396 | } | |
2397 | ||
2398 | if (result) | |
2399 | result |= HSO_INTF_BULK; | |
2400 | ||
2401 | if (config_data[16] & 0x1) | |
2402 | result |= HSO_INFO_CRC_BUG; | |
2403 | ||
2404 | return result; | |
2405 | } | |
2406 | ||
2407 | /* called once for each interface upon device insertion */ | |
2408 | static int hso_probe(struct usb_interface *interface, | |
2409 | const struct usb_device_id *id) | |
2410 | { | |
2411 | int mux, i, if_num, port_spec; | |
2412 | unsigned char port_mask; | |
2413 | struct hso_device *hso_dev = NULL; | |
2414 | struct hso_shared_int *shared_int; | |
2415 | struct hso_device *tmp_dev = NULL; | |
2416 | ||
2417 | if_num = interface->altsetting->desc.bInterfaceNumber; | |
2418 | ||
2419 | /* Get the interface/port specification from either driver_info or from | |
2420 | * the device itself */ | |
2421 | if (id->driver_info) | |
2422 | port_spec = ((u32 *)(id->driver_info))[if_num]; | |
2423 | else | |
2424 | port_spec = hso_get_config_data(interface); | |
2425 | ||
2426 | if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { | |
2427 | dev_err(&interface->dev, "Not our interface\n"); | |
2428 | return -ENODEV; | |
2429 | } | |
2430 | /* Check if we need to switch to alt interfaces prior to port | |
2431 | * configuration */ | |
2432 | if (interface->num_altsetting > 1) | |
2433 | usb_set_interface(interface_to_usbdev(interface), if_num, 1); | |
2434 | interface->needs_remote_wakeup = 1; | |
2435 | ||
2436 | /* Allocate new hso device(s) */ | |
2437 | switch (port_spec & HSO_INTF_MASK) { | |
2438 | case HSO_INTF_MUX: | |
2439 | if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { | |
2440 | /* Create the network device */ | |
2441 | if (!disable_net) { | |
2442 | hso_dev = hso_create_net_device(interface); | |
2443 | if (!hso_dev) | |
2444 | goto exit; | |
2445 | tmp_dev = hso_dev; | |
2446 | } | |
2447 | } | |
2448 | ||
2449 | if (hso_get_mux_ports(interface, &port_mask)) | |
2450 | /* TODO: de-allocate everything */ | |
2451 | goto exit; | |
2452 | ||
2453 | shared_int = hso_create_shared_int(interface); | |
2454 | if (!shared_int) | |
2455 | goto exit; | |
2456 | ||
2457 | for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { | |
2458 | if (port_mask & i) { | |
2459 | hso_dev = hso_create_mux_serial_device( | |
2460 | interface, i, shared_int); | |
2461 | if (!hso_dev) | |
2462 | goto exit; | |
2463 | } | |
2464 | } | |
2465 | ||
2466 | if (tmp_dev) | |
2467 | hso_dev = tmp_dev; | |
2468 | break; | |
2469 | ||
2470 | case HSO_INTF_BULK: | |
2471 | /* It's a regular bulk interface */ | |
2472 | if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) | |
2473 | && !disable_net) | |
2474 | hso_dev = hso_create_net_device(interface); | |
2475 | else | |
2476 | hso_dev = | |
2477 | hso_create_bulk_serial_device(interface, port_spec); | |
2478 | if (!hso_dev) | |
2479 | goto exit; | |
2480 | break; | |
2481 | default: | |
2482 | goto exit; | |
2483 | } | |
2484 | ||
2485 | usb_driver_claim_interface(&hso_driver, interface, hso_dev); | |
2486 | ||
2487 | /* save our data pointer in this device */ | |
2488 | usb_set_intfdata(interface, hso_dev); | |
2489 | ||
2490 | /* done */ | |
2491 | return 0; | |
2492 | exit: | |
2493 | hso_free_interface(interface); | |
2494 | return -ENODEV; | |
2495 | } | |
2496 | ||
2497 | /* device removed, cleaning up */ | |
2498 | static void hso_disconnect(struct usb_interface *interface) | |
2499 | { | |
2500 | hso_free_interface(interface); | |
2501 | ||
2502 | /* remove reference of our private data */ | |
2503 | usb_set_intfdata(interface, NULL); | |
2504 | ||
2505 | usb_driver_release_interface(&hso_driver, interface); | |
2506 | } | |
2507 | ||
2508 | static void async_get_intf(struct work_struct *data) | |
2509 | { | |
2510 | struct hso_device *hso_dev = | |
2511 | container_of(data, struct hso_device, async_get_intf); | |
2512 | usb_autopm_get_interface(hso_dev->interface); | |
2513 | } | |
2514 | ||
2515 | static void async_put_intf(struct work_struct *data) | |
2516 | { | |
2517 | struct hso_device *hso_dev = | |
2518 | container_of(data, struct hso_device, async_put_intf); | |
2519 | usb_autopm_put_interface(hso_dev->interface); | |
2520 | } | |
2521 | ||
2522 | static int hso_get_activity(struct hso_device *hso_dev) | |
2523 | { | |
2524 | if (hso_dev->usb->state == USB_STATE_SUSPENDED) { | |
2525 | if (!hso_dev->is_active) { | |
2526 | hso_dev->is_active = 1; | |
2527 | schedule_work(&hso_dev->async_get_intf); | |
2528 | } | |
2529 | } | |
2530 | ||
2531 | if (hso_dev->usb->state != USB_STATE_CONFIGURED) | |
2532 | return -EAGAIN; | |
2533 | ||
2534 | usb_mark_last_busy(hso_dev->usb); | |
2535 | ||
2536 | return 0; | |
2537 | } | |
2538 | ||
2539 | static int hso_put_activity(struct hso_device *hso_dev) | |
2540 | { | |
2541 | if (hso_dev->usb->state != USB_STATE_SUSPENDED) { | |
2542 | if (hso_dev->is_active) { | |
2543 | hso_dev->is_active = 0; | |
2544 | schedule_work(&hso_dev->async_put_intf); | |
2545 | return -EAGAIN; | |
2546 | } | |
2547 | } | |
2548 | hso_dev->is_active = 0; | |
2549 | return 0; | |
2550 | } | |
2551 | ||
2552 | /* called by kernel when we need to suspend device */ | |
2553 | static int hso_suspend(struct usb_interface *iface, pm_message_t message) | |
2554 | { | |
2555 | int i, result; | |
2556 | ||
2557 | /* Stop all serial ports */ | |
2558 | for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { | |
2559 | if (serial_table[i] && (serial_table[i]->interface == iface)) { | |
2560 | result = hso_stop_serial_device(serial_table[i]); | |
2561 | if (result) | |
2562 | goto out; | |
2563 | } | |
2564 | } | |
2565 | ||
2566 | /* Stop all network ports */ | |
2567 | for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { | |
2568 | if (network_table[i] && | |
2569 | (network_table[i]->interface == iface)) { | |
2570 | result = hso_stop_net_device(network_table[i]); | |
2571 | if (result) | |
2572 | goto out; | |
2573 | } | |
2574 | } | |
2575 | ||
2576 | out: | |
2577 | return 0; | |
2578 | } | |
2579 | ||
2580 | /* called by kernel when we need to resume device */ | |
2581 | static int hso_resume(struct usb_interface *iface) | |
2582 | { | |
2583 | int i, result = 0; | |
2584 | struct hso_net *hso_net; | |
2585 | ||
2586 | /* Start all serial ports */ | |
2587 | for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { | |
2588 | if (serial_table[i] && (serial_table[i]->interface == iface)) { | |
2589 | if (dev2ser(serial_table[i])->open_count) { | |
2590 | result = | |
2591 | hso_start_serial_device(serial_table[i], GFP_NOIO); | |
2592 | hso_kick_transmit(dev2ser(serial_table[i])); | |
2593 | if (result) | |
2594 | goto out; | |
2595 | } | |
2596 | } | |
2597 | } | |
2598 | ||
2599 | /* Start all network ports */ | |
2600 | for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { | |
2601 | if (network_table[i] && | |
2602 | (network_table[i]->interface == iface)) { | |
2603 | hso_net = dev2net(network_table[i]); | |
2604 | /* First transmit any lingering data, then restart the | |
2605 | * device. */ | |
2606 | if (hso_net->skb_tx_buf) { | |
2607 | dev_dbg(&iface->dev, | |
2608 | "Transmitting lingering data\n"); | |
2609 | hso_net_start_xmit(hso_net->skb_tx_buf, | |
2610 | hso_net->net); | |
2611 | } | |
2612 | result = hso_start_net_device(network_table[i]); | |
2613 | if (result) | |
2614 | goto out; | |
2615 | } | |
2616 | } | |
2617 | ||
2618 | out: | |
2619 | return result; | |
2620 | } | |
2621 | ||
2622 | static void hso_serial_ref_free(struct kref *ref) | |
2623 | { | |
2624 | struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); | |
2625 | ||
2626 | hso_free_serial_device(hso_dev); | |
2627 | } | |
2628 | ||
2629 | static void hso_free_interface(struct usb_interface *interface) | |
2630 | { | |
2631 | struct hso_serial *hso_dev; | |
2632 | int i; | |
2633 | ||
2634 | for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { | |
2635 | if (serial_table[i] | |
2636 | && (serial_table[i]->interface == interface)) { | |
2637 | hso_dev = dev2ser(serial_table[i]); | |
2638 | if (hso_dev->tty) | |
2639 | tty_hangup(hso_dev->tty); | |
2640 | mutex_lock(&hso_dev->parent->mutex); | |
2641 | hso_dev->parent->usb_gone = 1; | |
2642 | mutex_unlock(&hso_dev->parent->mutex); | |
2643 | kref_put(&serial_table[i]->ref, hso_serial_ref_free); | |
2644 | } | |
2645 | } | |
2646 | ||
2647 | for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { | |
2648 | if (network_table[i] | |
2649 | && (network_table[i]->interface == interface)) { | |
2650 | struct rfkill *rfk = dev2net(network_table[i])->rfkill; | |
2651 | /* hso_stop_net_device doesn't stop the net queue since | |
2652 | * traffic needs to start it again when suspended */ | |
2653 | netif_stop_queue(dev2net(network_table[i])->net); | |
2654 | hso_stop_net_device(network_table[i]); | |
2655 | cancel_work_sync(&network_table[i]->async_put_intf); | |
2656 | cancel_work_sync(&network_table[i]->async_get_intf); | |
2657 | if(rfk) | |
2658 | rfkill_unregister(rfk); | |
2659 | hso_free_net_device(network_table[i]); | |
2660 | } | |
2661 | } | |
2662 | } | |
2663 | ||
2664 | /* Helper functions */ | |
2665 | ||
2666 | /* Get the endpoint ! */ | |
2667 | static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, | |
2668 | int type, int dir) | |
2669 | { | |
2670 | int i; | |
2671 | struct usb_host_interface *iface = intf->cur_altsetting; | |
2672 | struct usb_endpoint_descriptor *endp; | |
2673 | ||
2674 | for (i = 0; i < iface->desc.bNumEndpoints; i++) { | |
2675 | endp = &iface->endpoint[i].desc; | |
2676 | if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && | |
2677 | ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == type)) | |
2678 | return endp; | |
2679 | } | |
2680 | ||
2681 | return NULL; | |
2682 | } | |
2683 | ||
2684 | /* Get the byte that describes which ports are enabled */ | |
2685 | static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) | |
2686 | { | |
2687 | int i; | |
2688 | struct usb_host_interface *iface = intf->cur_altsetting; | |
2689 | ||
2690 | if (iface->extralen == 3) { | |
2691 | *ports = iface->extra[2]; | |
2692 | return 0; | |
2693 | } | |
2694 | ||
2695 | for (i = 0; i < iface->desc.bNumEndpoints; i++) { | |
2696 | if (iface->endpoint[i].extralen == 3) { | |
2697 | *ports = iface->endpoint[i].extra[2]; | |
2698 | return 0; | |
2699 | } | |
2700 | } | |
2701 | ||
2702 | return -1; | |
2703 | } | |
2704 | ||
2705 | /* interrupt urb needs to be submitted, used for serial read of muxed port */ | |
2706 | static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, | |
2707 | struct usb_device *usb, gfp_t gfp) | |
2708 | { | |
2709 | int result; | |
2710 | ||
2711 | usb_fill_int_urb(shared_int->shared_intr_urb, usb, | |
2712 | usb_rcvintpipe(usb, | |
2713 | shared_int->intr_endp->bEndpointAddress & 0x7F), | |
2714 | shared_int->shared_intr_buf, | |
2715 | shared_int->intr_endp->wMaxPacketSize, | |
2716 | intr_callback, shared_int, | |
2717 | shared_int->intr_endp->bInterval); | |
2718 | ||
2719 | result = usb_submit_urb(shared_int->shared_intr_urb, gfp); | |
2720 | if (result) | |
2721 | dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__, | |
2722 | result); | |
2723 | ||
2724 | return result; | |
2725 | } | |
2726 | ||
2727 | /* operations setup of the serial interface */ | |
2728 | static struct tty_operations hso_serial_ops = { | |
2729 | .open = hso_serial_open, | |
2730 | .close = hso_serial_close, | |
2731 | .write = hso_serial_write, | |
2732 | .write_room = hso_serial_write_room, | |
2733 | .set_termios = hso_serial_set_termios, | |
2734 | .chars_in_buffer = hso_serial_chars_in_buffer, | |
2735 | .tiocmget = hso_serial_tiocmget, | |
2736 | .tiocmset = hso_serial_tiocmset, | |
2737 | }; | |
2738 | ||
2739 | static struct usb_driver hso_driver = { | |
2740 | .name = driver_name, | |
2741 | .probe = hso_probe, | |
2742 | .disconnect = hso_disconnect, | |
2743 | .id_table = hso_ids, | |
2744 | .suspend = hso_suspend, | |
2745 | .resume = hso_resume, | |
2746 | .supports_autosuspend = 1, | |
2747 | }; | |
2748 | ||
2749 | static int __init hso_init(void) | |
2750 | { | |
2751 | int i; | |
2752 | int result; | |
2753 | ||
2754 | /* put it in the log */ | |
2755 | printk(KERN_INFO "hso: %s\n", version); | |
2756 | ||
2757 | /* Initialise the serial table semaphore and table */ | |
2758 | spin_lock_init(&serial_table_lock); | |
2759 | for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) | |
2760 | serial_table[i] = NULL; | |
2761 | ||
2762 | /* allocate our driver using the proper amount of supported minors */ | |
2763 | tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); | |
2764 | if (!tty_drv) | |
2765 | return -ENOMEM; | |
2766 | ||
2767 | /* fill in all needed values */ | |
2768 | tty_drv->magic = TTY_DRIVER_MAGIC; | |
2769 | tty_drv->owner = THIS_MODULE; | |
2770 | tty_drv->driver_name = driver_name; | |
2771 | tty_drv->name = tty_filename; | |
2772 | ||
2773 | /* if major number is provided as parameter, use that one */ | |
2774 | if (tty_major) | |
2775 | tty_drv->major = tty_major; | |
2776 | ||
2777 | tty_drv->minor_start = 0; | |
2778 | tty_drv->num = HSO_SERIAL_TTY_MINORS; | |
2779 | tty_drv->type = TTY_DRIVER_TYPE_SERIAL; | |
2780 | tty_drv->subtype = SERIAL_TYPE_NORMAL; | |
2781 | tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; | |
2782 | tty_drv->init_termios = tty_std_termios; | |
2783 | tty_drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
2784 | tty_drv->termios = hso_serial_termios; | |
2785 | tty_drv->termios_locked = hso_serial_termios_locked; | |
2786 | tty_set_operations(tty_drv, &hso_serial_ops); | |
2787 | ||
2788 | /* register the tty driver */ | |
2789 | result = tty_register_driver(tty_drv); | |
2790 | if (result) { | |
2791 | printk(KERN_ERR "%s - tty_register_driver failed(%d)\n", | |
2792 | __func__, result); | |
2793 | return result; | |
2794 | } | |
2795 | ||
2796 | /* register this module as an usb driver */ | |
2797 | result = usb_register(&hso_driver); | |
2798 | if (result) { | |
2799 | printk(KERN_ERR "Could not register hso driver? error: %d\n", | |
2800 | result); | |
2801 | /* cleanup serial interface */ | |
2802 | tty_unregister_driver(tty_drv); | |
2803 | return result; | |
2804 | } | |
2805 | ||
2806 | /* done */ | |
2807 | return 0; | |
2808 | } | |
2809 | ||
2810 | static void __exit hso_exit(void) | |
2811 | { | |
2812 | printk(KERN_INFO "hso: unloaded\n"); | |
2813 | ||
2814 | tty_unregister_driver(tty_drv); | |
2815 | /* deregister the usb driver */ | |
2816 | usb_deregister(&hso_driver); | |
2817 | } | |
2818 | ||
2819 | /* Module definitions */ | |
2820 | module_init(hso_init); | |
2821 | module_exit(hso_exit); | |
2822 | ||
2823 | MODULE_AUTHOR(MOD_AUTHOR); | |
2824 | MODULE_DESCRIPTION(MOD_DESCRIPTION); | |
2825 | MODULE_LICENSE(MOD_LICENSE); | |
2826 | MODULE_INFO(Version, DRIVER_VERSION); | |
2827 | ||
2828 | /* change the debug level (eg: insmod hso.ko debug=0x04) */ | |
2829 | MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); | |
2830 | module_param(debug, int, S_IRUGO | S_IWUSR); | |
2831 | ||
2832 | /* set the major tty number (eg: insmod hso.ko tty_major=245) */ | |
2833 | MODULE_PARM_DESC(tty_major, "Set the major tty number"); | |
2834 | module_param(tty_major, int, S_IRUGO | S_IWUSR); | |
2835 | ||
2836 | /* disable network interface (eg: insmod hso.ko disable_net=1) */ | |
2837 | MODULE_PARM_DESC(disable_net, "Disable the network interface"); | |
2838 | module_param(disable_net, int, S_IRUGO | S_IWUSR); |