Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Garmin GPS driver | |
3 | * | |
b4026c45 | 4 | * Copyright (C) 2006-2011 Hermann Kneissel herkne@gmx.de |
1da177e4 LT |
5 | * |
6 | * The latest version of the driver can be found at | |
7 | * http://sourceforge.net/projects/garmin-gps/ | |
8 | * | |
9 | * This driver has been derived from v2.1 of the visor driver. | |
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 as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111 USA | |
24 | */ | |
25 | ||
1da177e4 LT |
26 | #include <linux/kernel.h> |
27 | #include <linux/errno.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/timer.h> | |
31 | #include <linux/tty.h> | |
32 | #include <linux/tty_driver.h> | |
33 | #include <linux/tty_flip.h> | |
34 | #include <linux/module.h> | |
35 | #include <linux/spinlock.h> | |
af6d780b | 36 | #include <linux/uaccess.h> |
60063497 | 37 | #include <linux/atomic.h> |
1da177e4 | 38 | #include <linux/usb.h> |
a969888c | 39 | #include <linux/usb/serial.h> |
1da177e4 LT |
40 | |
41 | /* the mode to be set when the port ist opened */ | |
42 | static int initial_mode = 1; | |
43 | ||
44 | /* debug flag */ | |
90ab5ee9 | 45 | static bool debug; |
1da177e4 | 46 | |
1da177e4 LT |
47 | #define GARMIN_VENDOR_ID 0x091E |
48 | ||
49 | /* | |
50 | * Version Information | |
51 | */ | |
52 | ||
53 | #define VERSION_MAJOR 0 | |
b4026c45 | 54 | #define VERSION_MINOR 36 |
1da177e4 LT |
55 | |
56 | #define _STR(s) #s | |
af6d780b | 57 | #define _DRIVER_VERSION(a, b) "v" _STR(a) "." _STR(b) |
1da177e4 LT |
58 | #define DRIVER_VERSION _DRIVER_VERSION(VERSION_MAJOR, VERSION_MINOR) |
59 | #define DRIVER_AUTHOR "hermann kneissel" | |
60 | #define DRIVER_DESC "garmin gps driver" | |
61 | ||
62 | /* error codes returned by the driver */ | |
63 | #define EINVPKT 1000 /* invalid packet structure */ | |
64 | ||
65 | ||
af6d780b | 66 | /* size of the header of a packet using the usb protocol */ |
1da177e4 LT |
67 | #define GARMIN_PKTHDR_LENGTH 12 |
68 | ||
af6d780b AC |
69 | /* max. possible size of a packet using the serial protocol */ |
70 | #define MAX_SERIAL_PKT_SIZ (3 + 255 + 3) | |
1da177e4 | 71 | |
af6d780b AC |
72 | /* max. possible size of a packet with worst case stuffing */ |
73 | #define MAX_SERIAL_PKT_SIZ_STUFFED (MAX_SERIAL_PKT_SIZ + 256) | |
1da177e4 | 74 | |
af6d780b AC |
75 | /* size of a buffer able to hold a complete (no stuffing) packet |
76 | * (the document protocol does not contain packets with a larger | |
77 | * size, but in theory a packet may be 64k+12 bytes - if in | |
78 | * later protocol versions larger packet sizes occur, this value | |
79 | * should be increased accordingly, so the input buffer is always | |
80 | * large enough the store a complete packet inclusive header) */ | |
81 | #define GPS_IN_BUFSIZ (GARMIN_PKTHDR_LENGTH+MAX_SERIAL_PKT_SIZ) | |
1da177e4 | 82 | |
af6d780b AC |
83 | /* size of a buffer able to hold a complete (incl. stuffing) packet */ |
84 | #define GPS_OUT_BUFSIZ (GARMIN_PKTHDR_LENGTH+MAX_SERIAL_PKT_SIZ_STUFFED) | |
1da177e4 | 85 | |
af6d780b AC |
86 | /* where to place the packet id of a serial packet, so we can |
87 | * prepend the usb-packet header without the need to move the | |
88 | * packets data */ | |
1da177e4 LT |
89 | #define GSP_INITIAL_OFFSET (GARMIN_PKTHDR_LENGTH-2) |
90 | ||
af6d780b | 91 | /* max. size of incoming private packets (header+1 param) */ |
1da177e4 LT |
92 | #define PRIVPKTSIZ (GARMIN_PKTHDR_LENGTH+4) |
93 | ||
94 | #define GARMIN_LAYERID_TRANSPORT 0 | |
95 | #define GARMIN_LAYERID_APPL 20 | |
af6d780b | 96 | /* our own layer-id to use for some control mechanisms */ |
1da177e4 LT |
97 | #define GARMIN_LAYERID_PRIVATE 0x01106E4B |
98 | ||
99 | #define GARMIN_PKTID_PVT_DATA 51 | |
100 | #define GARMIN_PKTID_L001_COMMAND_DATA 10 | |
101 | ||
102 | #define CMND_ABORT_TRANSFER 0 | |
103 | ||
af6d780b | 104 | /* packet ids used in private layer */ |
1da177e4 LT |
105 | #define PRIV_PKTID_SET_DEBUG 1 |
106 | #define PRIV_PKTID_SET_MODE 2 | |
107 | #define PRIV_PKTID_INFO_REQ 3 | |
108 | #define PRIV_PKTID_INFO_RESP 4 | |
109 | #define PRIV_PKTID_RESET_REQ 5 | |
110 | #define PRIV_PKTID_SET_DEF_MODE 6 | |
111 | ||
112 | ||
113 | #define ETX 0x03 | |
114 | #define DLE 0x10 | |
115 | #define ACK 0x06 | |
116 | #define NAK 0x15 | |
117 | ||
118 | /* structure used to queue incoming packets */ | |
119 | struct garmin_packet { | |
120 | struct list_head list; | |
121 | int seq; | |
af6d780b AC |
122 | /* the real size of the data array, always > 0 */ |
123 | int size; | |
1da177e4 LT |
124 | __u8 data[1]; |
125 | }; | |
126 | ||
127 | /* structure used to keep the current state of the driver */ | |
128 | struct garmin_data { | |
129 | __u8 state; | |
130 | __u16 flags; | |
131 | __u8 mode; | |
1da177e4 LT |
132 | __u8 count; |
133 | __u8 pkt_id; | |
134 | __u32 serial_num; | |
135 | struct timer_list timer; | |
136 | struct usb_serial_port *port; | |
137 | int seq_counter; | |
138 | int insize; | |
139 | int outsize; | |
140 | __u8 inbuffer [GPS_IN_BUFSIZ]; /* tty -> usb */ | |
141 | __u8 outbuffer[GPS_OUT_BUFSIZ]; /* usb -> tty */ | |
142 | __u8 privpkt[4*6]; | |
143 | spinlock_t lock; | |
144 | struct list_head pktlist; | |
145 | }; | |
146 | ||
147 | ||
148 | #define STATE_NEW 0 | |
149 | #define STATE_INITIAL_DELAY 1 | |
150 | #define STATE_TIMEOUT 2 | |
151 | #define STATE_SESSION_REQ1 3 | |
152 | #define STATE_SESSION_REQ2 4 | |
153 | #define STATE_ACTIVE 5 | |
154 | ||
155 | #define STATE_RESET 8 | |
156 | #define STATE_DISCONNECTED 9 | |
157 | #define STATE_WAIT_TTY_ACK 10 | |
158 | #define STATE_GSP_WAIT_DATA 11 | |
159 | ||
160 | #define MODE_NATIVE 0 | |
161 | #define MODE_GARMIN_SERIAL 1 | |
162 | ||
af6d780b | 163 | /* Flags used in garmin_data.flags: */ |
1da177e4 LT |
164 | #define FLAGS_SESSION_REPLY_MASK 0x00C0 |
165 | #define FLAGS_SESSION_REPLY1_SEEN 0x0080 | |
166 | #define FLAGS_SESSION_REPLY2_SEEN 0x0040 | |
167 | #define FLAGS_BULK_IN_ACTIVE 0x0020 | |
eb6d8c2d HK |
168 | #define FLAGS_BULK_IN_RESTART 0x0010 |
169 | #define FLAGS_THROTTLED 0x0008 | |
b4072f46 HK |
170 | #define APP_REQ_SEEN 0x0004 |
171 | #define APP_RESP_SEEN 0x0002 | |
1da177e4 LT |
172 | #define CLEAR_HALT_REQUIRED 0x0001 |
173 | ||
174 | #define FLAGS_QUEUING 0x0100 | |
1da177e4 LT |
175 | #define FLAGS_DROP_DATA 0x0800 |
176 | ||
177 | #define FLAGS_GSP_SKIP 0x1000 | |
178 | #define FLAGS_GSP_DLESEEN 0x2000 | |
179 | ||
180 | ||
181 | ||
182 | ||
183 | ||
184 | ||
185 | /* function prototypes */ | |
b4072f46 HK |
186 | static int gsp_next_packet(struct garmin_data *garmin_data_p); |
187 | static int garmin_write_bulk(struct usb_serial_port *port, | |
468d1362 HK |
188 | const unsigned char *buf, int count, |
189 | int dismiss_ack); | |
1da177e4 LT |
190 | |
191 | /* some special packets to be send or received */ | |
192 | static unsigned char const GARMIN_START_SESSION_REQ[] | |
193 | = { 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0 }; | |
1da177e4 LT |
194 | static unsigned char const GARMIN_START_SESSION_REPLY[] |
195 | = { 0, 0, 0, 0, 6, 0, 0, 0, 4, 0, 0, 0 }; | |
1da177e4 LT |
196 | static unsigned char const GARMIN_BULK_IN_AVAIL_REPLY[] |
197 | = { 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0 }; | |
198 | static unsigned char const GARMIN_APP_LAYER_REPLY[] | |
199 | = { 0x14, 0, 0, 0 }; | |
200 | static unsigned char const GARMIN_START_PVT_REQ[] | |
201 | = { 20, 0, 0, 0, 10, 0, 0, 0, 2, 0, 0, 0, 49, 0 }; | |
202 | static unsigned char const GARMIN_STOP_PVT_REQ[] | |
203 | = { 20, 0, 0, 0, 10, 0, 0, 0, 2, 0, 0, 0, 50, 0 }; | |
204 | static unsigned char const GARMIN_STOP_TRANSFER_REQ[] | |
205 | = { 20, 0, 0, 0, 10, 0, 0, 0, 2, 0, 0, 0, 0, 0 }; | |
206 | static unsigned char const GARMIN_STOP_TRANSFER_REQ_V2[] | |
207 | = { 20, 0, 0, 0, 10, 0, 0, 0, 1, 0, 0, 0, 0 }; | |
208 | static unsigned char const PRIVATE_REQ[] | |
209 | = { 0x4B, 0x6E, 0x10, 0x01, 0xFF, 0, 0, 0, 0xFF, 0, 0, 0 }; | |
210 | ||
211 | ||
212 | ||
7d40d7e8 | 213 | static const struct usb_device_id id_table[] = { |
af6d780b AC |
214 | /* the same device id seems to be used by all |
215 | usb enabled GPS devices */ | |
216 | { USB_DEVICE(GARMIN_VENDOR_ID, 3) }, | |
1da177e4 LT |
217 | { } /* Terminating entry */ |
218 | }; | |
219 | ||
af6d780b | 220 | MODULE_DEVICE_TABLE(usb, id_table); |
1da177e4 LT |
221 | |
222 | static struct usb_driver garmin_driver = { | |
1da177e4 LT |
223 | .name = "garmin_gps", |
224 | .probe = usb_serial_probe, | |
225 | .disconnect = usb_serial_disconnect, | |
226 | .id_table = id_table, | |
227 | }; | |
228 | ||
229 | ||
1da177e4 LT |
230 | static inline int getLayerId(const __u8 *usbPacket) |
231 | { | |
232 | return __le32_to_cpup((__le32 *)(usbPacket)); | |
233 | } | |
234 | ||
235 | static inline int getPacketId(const __u8 *usbPacket) | |
236 | { | |
237 | return __le32_to_cpup((__le32 *)(usbPacket+4)); | |
238 | } | |
239 | ||
240 | static inline int getDataLength(const __u8 *usbPacket) | |
241 | { | |
242 | return __le32_to_cpup((__le32 *)(usbPacket+8)); | |
243 | } | |
244 | ||
245 | ||
246 | /* | |
247 | * check if the usb-packet in buf contains an abort-transfer command. | |
248 | * (if yes, all queued data will be dropped) | |
249 | */ | |
250 | static inline int isAbortTrfCmnd(const unsigned char *buf) | |
251 | { | |
af6d780b AC |
252 | if (0 == memcmp(buf, GARMIN_STOP_TRANSFER_REQ, |
253 | sizeof(GARMIN_STOP_TRANSFER_REQ)) || | |
254 | 0 == memcmp(buf, GARMIN_STOP_TRANSFER_REQ_V2, | |
255 | sizeof(GARMIN_STOP_TRANSFER_REQ_V2))) | |
1da177e4 LT |
256 | return 1; |
257 | else | |
258 | return 0; | |
259 | } | |
260 | ||
261 | ||
262 | ||
263 | static void send_to_tty(struct usb_serial_port *port, | |
eb6d8c2d | 264 | char *data, unsigned int actual_length) |
1da177e4 | 265 | { |
4a90f09b | 266 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
1da177e4 LT |
267 | |
268 | if (tty && actual_length) { | |
269 | ||
af6d780b | 270 | usb_serial_debug_data(debug, &port->dev, |
441b62c1 | 271 | __func__, actual_length, data); |
1da177e4 | 272 | |
33f0f88f | 273 | tty_insert_flip_string(tty, data, actual_length); |
1da177e4 LT |
274 | tty_flip_buffer_push(tty); |
275 | } | |
4a90f09b | 276 | tty_kref_put(tty); |
1da177e4 LT |
277 | } |
278 | ||
279 | ||
280 | /****************************************************************************** | |
281 | * packet queue handling | |
282 | ******************************************************************************/ | |
283 | ||
284 | /* | |
285 | * queue a received (usb-)packet for later processing | |
286 | */ | |
af6d780b | 287 | static int pkt_add(struct garmin_data *garmin_data_p, |
eb6d8c2d | 288 | unsigned char *data, unsigned int data_length) |
1da177e4 | 289 | { |
eb6d8c2d | 290 | int state = 0; |
1da177e4 LT |
291 | int result = 0; |
292 | unsigned long flags; | |
293 | struct garmin_packet *pkt; | |
294 | ||
295 | /* process only packets containg data ... */ | |
296 | if (data_length) { | |
1da177e4 | 297 | pkt = kmalloc(sizeof(struct garmin_packet)+data_length, |
af6d780b | 298 | GFP_ATOMIC); |
1da177e4 LT |
299 | if (pkt == NULL) { |
300 | dev_err(&garmin_data_p->port->dev, "out of memory\n"); | |
301 | return 0; | |
302 | } | |
303 | pkt->size = data_length; | |
304 | memcpy(pkt->data, data, data_length); | |
305 | ||
306 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
eb6d8c2d | 307 | garmin_data_p->flags |= FLAGS_QUEUING; |
1da177e4 LT |
308 | result = list_empty(&garmin_data_p->pktlist); |
309 | pkt->seq = garmin_data_p->seq_counter++; | |
310 | list_add_tail(&pkt->list, &garmin_data_p->pktlist); | |
eb6d8c2d | 311 | state = garmin_data_p->state; |
1da177e4 LT |
312 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
313 | ||
b4072f46 HK |
314 | dbg("%s - added: pkt: %d - %d bytes", |
315 | __func__, pkt->seq, data_length); | |
316 | ||
1da177e4 | 317 | /* in serial mode, if someone is waiting for data from |
b4072f46 | 318 | the device, convert and send the next packet to tty. */ |
af6d780b | 319 | if (result && (state == STATE_GSP_WAIT_DATA)) |
1da177e4 | 320 | gsp_next_packet(garmin_data_p); |
1da177e4 LT |
321 | } |
322 | return result; | |
323 | } | |
324 | ||
325 | ||
326 | /* get the next pending packet */ | |
af6d780b | 327 | static struct garmin_packet *pkt_pop(struct garmin_data *garmin_data_p) |
1da177e4 LT |
328 | { |
329 | unsigned long flags; | |
330 | struct garmin_packet *result = NULL; | |
331 | ||
332 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
333 | if (!list_empty(&garmin_data_p->pktlist)) { | |
334 | result = (struct garmin_packet *)garmin_data_p->pktlist.next; | |
335 | list_del(&result->list); | |
336 | } | |
337 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
338 | return result; | |
339 | } | |
340 | ||
341 | ||
342 | /* free up all queued data */ | |
af6d780b | 343 | static void pkt_clear(struct garmin_data *garmin_data_p) |
1da177e4 LT |
344 | { |
345 | unsigned long flags; | |
346 | struct garmin_packet *result = NULL; | |
347 | ||
441b62c1 | 348 | dbg("%s", __func__); |
1da177e4 LT |
349 | |
350 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
351 | while (!list_empty(&garmin_data_p->pktlist)) { | |
352 | result = (struct garmin_packet *)garmin_data_p->pktlist.next; | |
353 | list_del(&result->list); | |
354 | kfree(result); | |
355 | } | |
356 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
357 | } | |
358 | ||
359 | ||
360 | /****************************************************************************** | |
361 | * garmin serial protocol handling handling | |
362 | ******************************************************************************/ | |
363 | ||
364 | /* send an ack packet back to the tty */ | |
af6d780b | 365 | static int gsp_send_ack(struct garmin_data *garmin_data_p, __u8 pkt_id) |
1da177e4 LT |
366 | { |
367 | __u8 pkt[10]; | |
eb6d8c2d HK |
368 | __u8 cksum = 0; |
369 | __u8 *ptr = pkt; | |
370 | unsigned l = 0; | |
1da177e4 | 371 | |
441b62c1 | 372 | dbg("%s - pkt-id: 0x%X.", __func__, 0xFF & pkt_id); |
1da177e4 LT |
373 | |
374 | *ptr++ = DLE; | |
375 | *ptr++ = ACK; | |
376 | cksum += ACK; | |
377 | ||
378 | *ptr++ = 2; | |
379 | cksum += 2; | |
380 | ||
381 | *ptr++ = pkt_id; | |
382 | cksum += pkt_id; | |
383 | ||
af6d780b | 384 | if (pkt_id == DLE) |
1da177e4 | 385 | *ptr++ = DLE; |
1da177e4 LT |
386 | |
387 | *ptr++ = 0; | |
388 | *ptr++ = 0xFF & (-cksum); | |
389 | *ptr++ = DLE; | |
390 | *ptr++ = ETX; | |
391 | ||
392 | l = ptr-pkt; | |
393 | ||
394 | send_to_tty(garmin_data_p->port, pkt, l); | |
395 | return 0; | |
396 | } | |
397 | ||
398 | ||
399 | ||
400 | /* | |
401 | * called for a complete packet received from tty layer | |
402 | * | |
b4072f46 | 403 | * the complete packet (pktid ... cksum) is in garmin_data_p->inbuf starting |
1da177e4 LT |
404 | * at GSP_INITIAL_OFFSET. |
405 | * | |
406 | * count - number of bytes in the input buffer including space reserved for | |
af6d780b | 407 | * the usb header: GSP_INITIAL_OFFSET + number of bytes in packet |
1da177e4 LT |
408 | * (including pkt-id, data-length a. cksum) |
409 | */ | |
af6d780b | 410 | static int gsp_rec_packet(struct garmin_data *garmin_data_p, int count) |
1da177e4 | 411 | { |
b4026c45 | 412 | unsigned long flags; |
af6d780b | 413 | const __u8 *recpkt = garmin_data_p->inbuffer+GSP_INITIAL_OFFSET; |
eb6d8c2d | 414 | __le32 *usbdata = (__le32 *) garmin_data_p->inbuffer; |
1da177e4 LT |
415 | |
416 | int cksum = 0; | |
417 | int n = 0; | |
418 | int pktid = recpkt[0]; | |
419 | int size = recpkt[1]; | |
420 | ||
421 | usb_serial_debug_data(debug, &garmin_data_p->port->dev, | |
441b62c1 | 422 | __func__, count-GSP_INITIAL_OFFSET, recpkt); |
1da177e4 LT |
423 | |
424 | if (size != (count-GSP_INITIAL_OFFSET-3)) { | |
425 | dbg("%s - invalid size, expected %d bytes, got %d", | |
441b62c1 | 426 | __func__, size, (count-GSP_INITIAL_OFFSET-3)); |
1da177e4 LT |
427 | return -EINVPKT; |
428 | } | |
429 | ||
430 | cksum += *recpkt++; | |
431 | cksum += *recpkt++; | |
432 | ||
af6d780b AC |
433 | /* sanity check, remove after test ... */ |
434 | if ((__u8 *)&(usbdata[3]) != recpkt) { | |
1da177e4 | 435 | dbg("%s - ptr mismatch %p - %p", |
441b62c1 | 436 | __func__, &(usbdata[4]), recpkt); |
1da177e4 LT |
437 | return -EINVPKT; |
438 | } | |
439 | ||
440 | while (n < size) { | |
441 | cksum += *recpkt++; | |
442 | n++; | |
443 | } | |
444 | ||
eb6d8c2d HK |
445 | if ((0xff & (cksum + *recpkt)) != 0) { |
446 | dbg("%s - invalid checksum, expected %02x, got %02x", | |
441b62c1 | 447 | __func__, 0xff & -cksum, 0xff & *recpkt); |
eb6d8c2d HK |
448 | return -EINVPKT; |
449 | } | |
1da177e4 LT |
450 | |
451 | usbdata[0] = __cpu_to_le32(GARMIN_LAYERID_APPL); | |
452 | usbdata[1] = __cpu_to_le32(pktid); | |
453 | usbdata[2] = __cpu_to_le32(size); | |
454 | ||
af6d780b | 455 | garmin_write_bulk(garmin_data_p->port, garmin_data_p->inbuffer, |
468d1362 | 456 | GARMIN_PKTHDR_LENGTH+size, 0); |
1da177e4 LT |
457 | |
458 | /* if this was an abort-transfer command, flush all | |
459 | queued data. */ | |
460 | if (isAbortTrfCmnd(garmin_data_p->inbuffer)) { | |
b4026c45 | 461 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 | 462 | garmin_data_p->flags |= FLAGS_DROP_DATA; |
b4026c45 | 463 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 LT |
464 | pkt_clear(garmin_data_p); |
465 | } | |
466 | ||
467 | return count; | |
468 | } | |
469 | ||
470 | ||
471 | ||
472 | /* | |
473 | * Called for data received from tty | |
474 | * | |
475 | * buf contains the data read, it may span more than one packet or even | |
476 | * incomplete packets | |
477 | * | |
478 | * input record should be a serial-record, but it may not be complete. | |
479 | * Copy it into our local buffer, until an etx is seen (or an error | |
480 | * occurs). | |
481 | * Once the record is complete, convert into a usb packet and send it | |
482 | * to the bulk pipe, send an ack back to the tty. | |
483 | * | |
484 | * If the input is an ack, just send the last queued packet to the | |
485 | * tty layer. | |
486 | * | |
487 | * if the input is an abort command, drop all queued data. | |
488 | */ | |
489 | ||
af6d780b | 490 | static int gsp_receive(struct garmin_data *garmin_data_p, |
eb6d8c2d | 491 | const unsigned char *buf, int count) |
1da177e4 | 492 | { |
eb6d8c2d | 493 | unsigned long flags; |
1da177e4 LT |
494 | int offs = 0; |
495 | int ack_or_nak_seen = 0; | |
eb6d8c2d HK |
496 | __u8 *dest; |
497 | int size; | |
af6d780b | 498 | /* dleSeen: set if last byte read was a DLE */ |
eb6d8c2d | 499 | int dleSeen; |
af6d780b AC |
500 | /* skip: if set, skip incoming data until possible start of |
501 | * new packet | |
502 | */ | |
eb6d8c2d | 503 | int skip; |
1da177e4 LT |
504 | __u8 data; |
505 | ||
eb6d8c2d HK |
506 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
507 | dest = garmin_data_p->inbuffer; | |
508 | size = garmin_data_p->insize; | |
509 | dleSeen = garmin_data_p->flags & FLAGS_GSP_DLESEEN; | |
510 | skip = garmin_data_p->flags & FLAGS_GSP_SKIP; | |
511 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
512 | ||
b4072f46 HK |
513 | /* dbg("%s - dle=%d skip=%d size=%d count=%d", |
514 | __func__, dleSeen, skip, size, count); */ | |
1da177e4 | 515 | |
af6d780b | 516 | if (size == 0) |
1da177e4 | 517 | size = GSP_INITIAL_OFFSET; |
1da177e4 LT |
518 | |
519 | while (offs < count) { | |
520 | ||
521 | data = *(buf+offs); | |
af6d780b | 522 | offs++; |
1da177e4 LT |
523 | |
524 | if (data == DLE) { | |
525 | if (skip) { /* start of a new pkt */ | |
526 | skip = 0; | |
527 | size = GSP_INITIAL_OFFSET; | |
528 | dleSeen = 1; | |
529 | } else if (dleSeen) { | |
530 | dest[size++] = data; | |
531 | dleSeen = 0; | |
532 | } else { | |
533 | dleSeen = 1; | |
534 | } | |
535 | } else if (data == ETX) { | |
536 | if (dleSeen) { | |
537 | /* packet complete */ | |
538 | ||
539 | data = dest[GSP_INITIAL_OFFSET]; | |
540 | ||
541 | if (data == ACK) { | |
542 | ack_or_nak_seen = ACK; | |
543 | dbg("ACK packet complete."); | |
544 | } else if (data == NAK) { | |
545 | ack_or_nak_seen = NAK; | |
546 | dbg("NAK packet complete."); | |
547 | } else { | |
af6d780b AC |
548 | dbg("packet complete - id=0x%X.", |
549 | 0xFF & data); | |
1da177e4 LT |
550 | gsp_rec_packet(garmin_data_p, size); |
551 | } | |
552 | ||
553 | skip = 1; | |
554 | size = GSP_INITIAL_OFFSET; | |
555 | dleSeen = 0; | |
556 | } else { | |
557 | dest[size++] = data; | |
558 | } | |
559 | } else if (!skip) { | |
560 | ||
561 | if (dleSeen) { | |
1da177e4 LT |
562 | size = GSP_INITIAL_OFFSET; |
563 | dleSeen = 0; | |
564 | } | |
565 | ||
566 | dest[size++] = data; | |
567 | } | |
568 | ||
569 | if (size >= GPS_IN_BUFSIZ) { | |
441b62c1 | 570 | dbg("%s - packet too large.", __func__); |
1da177e4 LT |
571 | skip = 1; |
572 | size = GSP_INITIAL_OFFSET; | |
573 | dleSeen = 0; | |
574 | } | |
575 | } | |
576 | ||
eb6d8c2d HK |
577 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
578 | ||
1da177e4 LT |
579 | garmin_data_p->insize = size; |
580 | ||
af6d780b | 581 | /* copy flags back to structure */ |
1da177e4 LT |
582 | if (skip) |
583 | garmin_data_p->flags |= FLAGS_GSP_SKIP; | |
584 | else | |
585 | garmin_data_p->flags &= ~FLAGS_GSP_SKIP; | |
586 | ||
587 | if (dleSeen) | |
588 | garmin_data_p->flags |= FLAGS_GSP_DLESEEN; | |
589 | else | |
590 | garmin_data_p->flags &= ~FLAGS_GSP_DLESEEN; | |
591 | ||
eb6d8c2d HK |
592 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
593 | ||
b4072f46 HK |
594 | if (ack_or_nak_seen) { |
595 | if (gsp_next_packet(garmin_data_p) > 0) | |
596 | garmin_data_p->state = STATE_ACTIVE; | |
597 | else | |
598 | garmin_data_p->state = STATE_GSP_WAIT_DATA; | |
599 | } | |
1da177e4 LT |
600 | return count; |
601 | } | |
602 | ||
603 | ||
604 | ||
1da177e4 LT |
605 | /* |
606 | * Sends a usb packet to the tty | |
607 | * | |
608 | * Assumes, that all packages and at an usb-packet boundary. | |
609 | * | |
610 | * return <0 on error, 0 if packet is incomplete or > 0 if packet was sent | |
611 | */ | |
af6d780b | 612 | static int gsp_send(struct garmin_data *garmin_data_p, |
1da177e4 LT |
613 | const unsigned char *buf, int count) |
614 | { | |
615 | const unsigned char *src; | |
616 | unsigned char *dst; | |
617 | int pktid = 0; | |
618 | int datalen = 0; | |
619 | int cksum = 0; | |
af6d780b | 620 | int i = 0; |
1da177e4 LT |
621 | int k; |
622 | ||
441b62c1 | 623 | dbg("%s - state %d - %d bytes.", __func__, |
af6d780b | 624 | garmin_data_p->state, count); |
1da177e4 LT |
625 | |
626 | k = garmin_data_p->outsize; | |
627 | if ((k+count) > GPS_OUT_BUFSIZ) { | |
628 | dbg("packet too large"); | |
629 | garmin_data_p->outsize = 0; | |
630 | return -4; | |
631 | } | |
632 | ||
633 | memcpy(garmin_data_p->outbuffer+k, buf, count); | |
634 | k += count; | |
635 | garmin_data_p->outsize = k; | |
636 | ||
637 | if (k >= GARMIN_PKTHDR_LENGTH) { | |
638 | pktid = getPacketId(garmin_data_p->outbuffer); | |
af6d780b | 639 | datalen = getDataLength(garmin_data_p->outbuffer); |
1da177e4 LT |
640 | i = GARMIN_PKTHDR_LENGTH + datalen; |
641 | if (k < i) | |
642 | return 0; | |
643 | } else { | |
644 | return 0; | |
645 | } | |
646 | ||
af6d780b | 647 | dbg("%s - %d bytes in buffer, %d bytes in pkt.", __func__, k, i); |
1da177e4 LT |
648 | |
649 | /* garmin_data_p->outbuffer now contains a complete packet */ | |
650 | ||
651 | usb_serial_debug_data(debug, &garmin_data_p->port->dev, | |
af6d780b | 652 | __func__, k, garmin_data_p->outbuffer); |
1da177e4 LT |
653 | |
654 | garmin_data_p->outsize = 0; | |
655 | ||
656 | if (GARMIN_LAYERID_APPL != getLayerId(garmin_data_p->outbuffer)) { | |
af6d780b AC |
657 | dbg("not an application packet (%d)", |
658 | getLayerId(garmin_data_p->outbuffer)); | |
1da177e4 LT |
659 | return -1; |
660 | } | |
661 | ||
662 | if (pktid > 255) { | |
663 | dbg("packet-id %d too large", pktid); | |
664 | return -2; | |
665 | } | |
666 | ||
667 | if (datalen > 255) { | |
668 | dbg("packet-size %d too large", datalen); | |
669 | return -3; | |
670 | } | |
671 | ||
672 | /* the serial protocol should be able to handle this packet */ | |
673 | ||
674 | k = 0; | |
675 | src = garmin_data_p->outbuffer+GARMIN_PKTHDR_LENGTH; | |
af6d780b | 676 | for (i = 0; i < datalen; i++) { |
1da177e4 LT |
677 | if (*src++ == DLE) |
678 | k++; | |
679 | } | |
680 | ||
681 | src = garmin_data_p->outbuffer+GARMIN_PKTHDR_LENGTH; | |
682 | if (k > (GARMIN_PKTHDR_LENGTH-2)) { | |
af6d780b | 683 | /* can't add stuffing DLEs in place, move data to end |
eb6d8c2d | 684 | of buffer ... */ |
1da177e4 LT |
685 | dst = garmin_data_p->outbuffer+GPS_OUT_BUFSIZ-datalen; |
686 | memcpy(dst, src, datalen); | |
687 | src = dst; | |
688 | } | |
689 | ||
690 | dst = garmin_data_p->outbuffer; | |
691 | ||
692 | *dst++ = DLE; | |
693 | *dst++ = pktid; | |
694 | cksum += pktid; | |
695 | *dst++ = datalen; | |
696 | cksum += datalen; | |
697 | if (datalen == DLE) | |
698 | *dst++ = DLE; | |
699 | ||
af6d780b | 700 | for (i = 0; i < datalen; i++) { |
1da177e4 LT |
701 | __u8 c = *src++; |
702 | *dst++ = c; | |
703 | cksum += c; | |
704 | if (c == DLE) | |
705 | *dst++ = DLE; | |
706 | } | |
af6d780b | 707 | |
1da177e4 LT |
708 | cksum = 0xFF & -cksum; |
709 | *dst++ = cksum; | |
710 | if (cksum == DLE) | |
711 | *dst++ = DLE; | |
712 | *dst++ = DLE; | |
713 | *dst++ = ETX; | |
714 | ||
715 | i = dst-garmin_data_p->outbuffer; | |
716 | ||
717 | send_to_tty(garmin_data_p->port, garmin_data_p->outbuffer, i); | |
718 | ||
719 | garmin_data_p->pkt_id = pktid; | |
720 | garmin_data_p->state = STATE_WAIT_TTY_ACK; | |
721 | ||
722 | return i; | |
723 | } | |
724 | ||
725 | ||
1da177e4 LT |
726 | /* |
727 | * Process the next pending data packet - if there is one | |
728 | */ | |
b4072f46 | 729 | static int gsp_next_packet(struct garmin_data *garmin_data_p) |
1da177e4 | 730 | { |
b4072f46 | 731 | int result = 0; |
1da177e4 LT |
732 | struct garmin_packet *pkt = NULL; |
733 | ||
734 | while ((pkt = pkt_pop(garmin_data_p)) != NULL) { | |
441b62c1 | 735 | dbg("%s - next pkt: %d", __func__, pkt->seq); |
b4072f46 HK |
736 | result = gsp_send(garmin_data_p, pkt->data, pkt->size); |
737 | if (result > 0) { | |
1da177e4 | 738 | kfree(pkt); |
b4072f46 | 739 | return result; |
1da177e4 LT |
740 | } |
741 | kfree(pkt); | |
742 | } | |
b4072f46 | 743 | return result; |
1da177e4 LT |
744 | } |
745 | ||
746 | ||
747 | ||
1da177e4 LT |
748 | /****************************************************************************** |
749 | * garmin native mode | |
750 | ******************************************************************************/ | |
751 | ||
752 | ||
753 | /* | |
754 | * Called for data received from tty | |
755 | * | |
756 | * The input data is expected to be in garmin usb-packet format. | |
757 | * | |
758 | * buf contains the data read, it may span more than one packet | |
759 | * or even incomplete packets | |
760 | */ | |
af6d780b | 761 | static int nat_receive(struct garmin_data *garmin_data_p, |
eb6d8c2d | 762 | const unsigned char *buf, int count) |
1da177e4 | 763 | { |
eb6d8c2d | 764 | unsigned long flags; |
af6d780b | 765 | __u8 *dest; |
1da177e4 LT |
766 | int offs = 0; |
767 | int result = count; | |
768 | int len; | |
769 | ||
770 | while (offs < count) { | |
af6d780b | 771 | /* if buffer contains header, copy rest of data */ |
1da177e4 LT |
772 | if (garmin_data_p->insize >= GARMIN_PKTHDR_LENGTH) |
773 | len = GARMIN_PKTHDR_LENGTH | |
774 | +getDataLength(garmin_data_p->inbuffer); | |
775 | else | |
776 | len = GARMIN_PKTHDR_LENGTH; | |
777 | ||
778 | if (len >= GPS_IN_BUFSIZ) { | |
af6d780b AC |
779 | /* seems to be an invalid packet, ignore rest |
780 | of input */ | |
781 | dbg("%s - packet size too large: %d", __func__, len); | |
1da177e4 LT |
782 | garmin_data_p->insize = 0; |
783 | count = 0; | |
784 | result = -EINVPKT; | |
785 | } else { | |
786 | len -= garmin_data_p->insize; | |
787 | if (len > (count-offs)) | |
788 | len = (count-offs); | |
789 | if (len > 0) { | |
790 | dest = garmin_data_p->inbuffer | |
af6d780b | 791 | + garmin_data_p->insize; |
1da177e4 LT |
792 | memcpy(dest, buf+offs, len); |
793 | garmin_data_p->insize += len; | |
794 | offs += len; | |
795 | } | |
796 | } | |
797 | ||
798 | /* do we have a complete packet ? */ | |
799 | if (garmin_data_p->insize >= GARMIN_PKTHDR_LENGTH) { | |
800 | len = GARMIN_PKTHDR_LENGTH+ | |
801 | getDataLength(garmin_data_p->inbuffer); | |
802 | if (garmin_data_p->insize >= len) { | |
af6d780b AC |
803 | garmin_write_bulk(garmin_data_p->port, |
804 | garmin_data_p->inbuffer, | |
805 | len, 0); | |
1da177e4 LT |
806 | garmin_data_p->insize = 0; |
807 | ||
808 | /* if this was an abort-transfer command, | |
809 | flush all queued data. */ | |
810 | if (isAbortTrfCmnd(garmin_data_p->inbuffer)) { | |
af6d780b AC |
811 | spin_lock_irqsave(&garmin_data_p->lock, |
812 | flags); | |
1da177e4 | 813 | garmin_data_p->flags |= FLAGS_DROP_DATA; |
af6d780b AC |
814 | spin_unlock_irqrestore( |
815 | &garmin_data_p->lock, flags); | |
1da177e4 LT |
816 | pkt_clear(garmin_data_p); |
817 | } | |
818 | } | |
819 | } | |
820 | } | |
821 | return result; | |
822 | } | |
823 | ||
824 | ||
825 | /****************************************************************************** | |
826 | * private packets | |
827 | ******************************************************************************/ | |
828 | ||
829 | static void priv_status_resp(struct usb_serial_port *port) | |
830 | { | |
af6d780b | 831 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 LT |
832 | __le32 *pkt = (__le32 *)garmin_data_p->privpkt; |
833 | ||
834 | pkt[0] = __cpu_to_le32(GARMIN_LAYERID_PRIVATE); | |
835 | pkt[1] = __cpu_to_le32(PRIV_PKTID_INFO_RESP); | |
836 | pkt[2] = __cpu_to_le32(12); | |
837 | pkt[3] = __cpu_to_le32(VERSION_MAJOR << 16 | VERSION_MINOR); | |
838 | pkt[4] = __cpu_to_le32(garmin_data_p->mode); | |
839 | pkt[5] = __cpu_to_le32(garmin_data_p->serial_num); | |
840 | ||
af6d780b | 841 | send_to_tty(port, (__u8 *)pkt, 6 * 4); |
1da177e4 LT |
842 | } |
843 | ||
844 | ||
845 | /****************************************************************************** | |
846 | * Garmin specific driver functions | |
847 | ******************************************************************************/ | |
848 | ||
849 | static int process_resetdev_request(struct usb_serial_port *port) | |
850 | { | |
eb6d8c2d | 851 | unsigned long flags; |
1da177e4 | 852 | int status; |
af6d780b | 853 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 854 | |
eb6d8c2d | 855 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 LT |
856 | garmin_data_p->flags &= ~(CLEAR_HALT_REQUIRED); |
857 | garmin_data_p->state = STATE_RESET; | |
858 | garmin_data_p->serial_num = 0; | |
eb6d8c2d | 859 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 | 860 | |
af6d780b AC |
861 | usb_kill_urb(port->interrupt_in_urb); |
862 | dbg("%s - usb_reset_device", __func__); | |
1da177e4 LT |
863 | status = usb_reset_device(port->serial->dev); |
864 | if (status) | |
865 | dbg("%s - usb_reset_device failed: %d", | |
441b62c1 | 866 | __func__, status); |
1da177e4 LT |
867 | return status; |
868 | } | |
869 | ||
870 | ||
871 | ||
872 | /* | |
873 | * clear all cached data | |
874 | */ | |
af6d780b | 875 | static int garmin_clear(struct garmin_data *garmin_data_p) |
1da177e4 | 876 | { |
eb6d8c2d | 877 | unsigned long flags; |
1da177e4 LT |
878 | int status = 0; |
879 | ||
1da177e4 LT |
880 | /* flush all queued data */ |
881 | pkt_clear(garmin_data_p); | |
882 | ||
eb6d8c2d | 883 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 LT |
884 | garmin_data_p->insize = 0; |
885 | garmin_data_p->outsize = 0; | |
eb6d8c2d | 886 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 LT |
887 | |
888 | return status; | |
889 | } | |
890 | ||
891 | ||
1da177e4 LT |
892 | static int garmin_init_session(struct usb_serial_port *port) |
893 | { | |
894 | struct usb_serial *serial = port->serial; | |
af6d780b | 895 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 896 | int status = 0; |
b4072f46 | 897 | int i = 0; |
1da177e4 LT |
898 | |
899 | if (status == 0) { | |
af6d780b | 900 | usb_kill_urb(port->interrupt_in_urb); |
1da177e4 | 901 | |
441b62c1 | 902 | dbg("%s - adding interrupt input", __func__); |
1da177e4 LT |
903 | status = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
904 | if (status) | |
905 | dev_err(&serial->dev->dev, | |
af6d780b AC |
906 | "%s - failed submitting interrupt urb, error %d\n", |
907 | __func__, status); | |
1da177e4 LT |
908 | } |
909 | ||
b4072f46 HK |
910 | /* |
911 | * using the initialization method from gpsbabel. See comments in | |
912 | * gpsbabel/jeeps/gpslibusb.c gusb_reset_toggles() | |
913 | */ | |
1da177e4 | 914 | if (status == 0) { |
441b62c1 | 915 | dbg("%s - starting session ...", __func__); |
1da177e4 | 916 | garmin_data_p->state = STATE_ACTIVE; |
1da177e4 | 917 | |
b4072f46 | 918 | for (i = 0; i < 3; i++) { |
1da177e4 | 919 | status = garmin_write_bulk(port, |
b4072f46 HK |
920 | GARMIN_START_SESSION_REQ, |
921 | sizeof(GARMIN_START_SESSION_REQ), 0); | |
922 | ||
923 | if (status < 0) | |
924 | break; | |
1da177e4 | 925 | } |
b4072f46 HK |
926 | |
927 | if (status > 0) | |
928 | status = 0; | |
1da177e4 LT |
929 | } |
930 | ||
931 | return status; | |
932 | } | |
933 | ||
934 | ||
935 | ||
a509a7e4 | 936 | static int garmin_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 | 937 | { |
eb6d8c2d | 938 | unsigned long flags; |
1da177e4 | 939 | int status = 0; |
af6d780b | 940 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 941 | |
441b62c1 | 942 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 943 | |
eb6d8c2d | 944 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 LT |
945 | garmin_data_p->mode = initial_mode; |
946 | garmin_data_p->count = 0; | |
b4026c45 | 947 | garmin_data_p->flags &= FLAGS_SESSION_REPLY1_SEEN; |
eb6d8c2d | 948 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 LT |
949 | |
950 | /* shutdown any bulk reads that might be going on */ | |
af6d780b AC |
951 | usb_kill_urb(port->write_urb); |
952 | usb_kill_urb(port->read_urb); | |
1da177e4 | 953 | |
95da310e | 954 | if (garmin_data_p->state == STATE_RESET) |
1da177e4 | 955 | status = garmin_init_session(port); |
1da177e4 LT |
956 | |
957 | garmin_data_p->state = STATE_ACTIVE; | |
1da177e4 LT |
958 | return status; |
959 | } | |
960 | ||
961 | ||
335f8514 | 962 | static void garmin_close(struct usb_serial_port *port) |
1da177e4 LT |
963 | { |
964 | struct usb_serial *serial = port->serial; | |
af6d780b | 965 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 966 | |
441b62c1 | 967 | dbg("%s - port %d - mode=%d state=%d flags=0x%X", __func__, |
1da177e4 LT |
968 | port->number, garmin_data_p->mode, |
969 | garmin_data_p->state, garmin_data_p->flags); | |
970 | ||
971 | if (!serial) | |
972 | return; | |
973 | ||
95bef012 | 974 | mutex_lock(&port->serial->disc_mutex); |
b4072f46 | 975 | |
95bef012 ON |
976 | if (!port->serial->disconnected) |
977 | garmin_clear(garmin_data_p); | |
1da177e4 LT |
978 | |
979 | /* shutdown our urbs */ | |
af6d780b AC |
980 | usb_kill_urb(port->read_urb); |
981 | usb_kill_urb(port->write_urb); | |
1da177e4 | 982 | |
b4072f46 HK |
983 | /* keep reset state so we know that we must start a new session */ |
984 | if (garmin_data_p->state != STATE_RESET) | |
1da177e4 | 985 | garmin_data_p->state = STATE_DISCONNECTED; |
b4072f46 | 986 | |
95bef012 | 987 | mutex_unlock(&port->serial->disc_mutex); |
1da177e4 LT |
988 | } |
989 | ||
b4072f46 | 990 | |
af6d780b | 991 | static void garmin_write_bulk_callback(struct urb *urb) |
1da177e4 | 992 | { |
cdc97792 | 993 | struct usb_serial_port *port = urb->context; |
1da177e4 | 994 | |
468d1362 | 995 | if (port) { |
af6d780b AC |
996 | struct garmin_data *garmin_data_p = |
997 | usb_get_serial_port_data(port); | |
1da177e4 | 998 | |
441b62c1 | 999 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1000 | |
b4072f46 | 1001 | if (GARMIN_LAYERID_APPL == getLayerId(urb->transfer_buffer)) { |
468d1362 | 1002 | |
b4072f46 HK |
1003 | if (garmin_data_p->mode == MODE_GARMIN_SERIAL) { |
1004 | gsp_send_ack(garmin_data_p, | |
1005 | ((__u8 *)urb->transfer_buffer)[4]); | |
1006 | } | |
468d1362 | 1007 | } |
468d1362 | 1008 | usb_serial_port_softint(port); |
1da177e4 LT |
1009 | } |
1010 | ||
af6d780b AC |
1011 | /* Ignore errors that resulted from garmin_write_bulk with |
1012 | dismiss_ack = 1 */ | |
468d1362 HK |
1013 | |
1014 | /* free up the transfer buffer, as usb_free_urb() does not do this */ | |
af6d780b | 1015 | kfree(urb->transfer_buffer); |
1da177e4 LT |
1016 | } |
1017 | ||
1018 | ||
af6d780b | 1019 | static int garmin_write_bulk(struct usb_serial_port *port, |
468d1362 HK |
1020 | const unsigned char *buf, int count, |
1021 | int dismiss_ack) | |
1da177e4 | 1022 | { |
eb6d8c2d | 1023 | unsigned long flags; |
1da177e4 | 1024 | struct usb_serial *serial = port->serial; |
af6d780b | 1025 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 LT |
1026 | struct urb *urb; |
1027 | unsigned char *buffer; | |
1028 | int status; | |
1029 | ||
441b62c1 | 1030 | dbg("%s - port %d, state %d", __func__, port->number, |
1da177e4 LT |
1031 | garmin_data_p->state); |
1032 | ||
eb6d8c2d | 1033 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 | 1034 | garmin_data_p->flags &= ~FLAGS_DROP_DATA; |
eb6d8c2d | 1035 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 | 1036 | |
af6d780b | 1037 | buffer = kmalloc(count, GFP_ATOMIC); |
1da177e4 LT |
1038 | if (!buffer) { |
1039 | dev_err(&port->dev, "out of memory\n"); | |
1040 | return -ENOMEM; | |
1041 | } | |
1042 | ||
1043 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
1044 | if (!urb) { | |
1045 | dev_err(&port->dev, "no more free urbs\n"); | |
af6d780b | 1046 | kfree(buffer); |
1da177e4 LT |
1047 | return -ENOMEM; |
1048 | } | |
1049 | ||
af6d780b | 1050 | memcpy(buffer, buf, count); |
1da177e4 | 1051 | |
441b62c1 | 1052 | usb_serial_debug_data(debug, &port->dev, __func__, count, buffer); |
1da177e4 | 1053 | |
af6d780b AC |
1054 | usb_fill_bulk_urb(urb, serial->dev, |
1055 | usb_sndbulkpipe(serial->dev, | |
1056 | port->bulk_out_endpointAddress), | |
1da177e4 | 1057 | buffer, count, |
468d1362 HK |
1058 | garmin_write_bulk_callback, |
1059 | dismiss_ack ? NULL : port); | |
1da177e4 LT |
1060 | urb->transfer_flags |= URB_ZERO_PACKET; |
1061 | ||
1062 | if (GARMIN_LAYERID_APPL == getLayerId(buffer)) { | |
b4072f46 HK |
1063 | |
1064 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
1065 | garmin_data_p->flags |= APP_REQ_SEEN; | |
1066 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
1067 | ||
1da177e4 LT |
1068 | if (garmin_data_p->mode == MODE_GARMIN_SERIAL) { |
1069 | pkt_clear(garmin_data_p); | |
1070 | garmin_data_p->state = STATE_GSP_WAIT_DATA; | |
1071 | } | |
1072 | } | |
1073 | ||
1074 | /* send it down the pipe */ | |
1075 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
1076 | if (status) { | |
1077 | dev_err(&port->dev, | |
af6d780b | 1078 | "%s - usb_submit_urb(write bulk) failed with status = %d\n", |
441b62c1 | 1079 | __func__, status); |
1da177e4 | 1080 | count = status; |
1da177e4 LT |
1081 | } |
1082 | ||
1083 | /* we are done with this urb, so let the host driver | |
1084 | * really free it when it is finished with it */ | |
af6d780b | 1085 | usb_free_urb(urb); |
1da177e4 LT |
1086 | |
1087 | return count; | |
1088 | } | |
1089 | ||
af6d780b | 1090 | static int garmin_write(struct tty_struct *tty, struct usb_serial_port *port, |
95da310e | 1091 | const unsigned char *buf, int count) |
1da177e4 LT |
1092 | { |
1093 | int pktid, pktsiz, len; | |
af6d780b | 1094 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 LT |
1095 | __le32 *privpkt = (__le32 *)garmin_data_p->privpkt; |
1096 | ||
441b62c1 | 1097 | usb_serial_debug_data(debug, &port->dev, __func__, count, buf); |
1da177e4 | 1098 | |
b4072f46 HK |
1099 | if (garmin_data_p->state == STATE_RESET) |
1100 | return -EIO; | |
1101 | ||
1da177e4 LT |
1102 | /* check for our private packets */ |
1103 | if (count >= GARMIN_PKTHDR_LENGTH) { | |
1da177e4 LT |
1104 | len = PRIVPKTSIZ; |
1105 | if (count < len) | |
1106 | len = count; | |
1107 | ||
1108 | memcpy(garmin_data_p->privpkt, buf, len); | |
1109 | ||
1110 | pktsiz = getDataLength(garmin_data_p->privpkt); | |
1111 | pktid = getPacketId(garmin_data_p->privpkt); | |
1112 | ||
1113 | if (count == (GARMIN_PKTHDR_LENGTH+pktsiz) | |
af6d780b AC |
1114 | && GARMIN_LAYERID_PRIVATE == |
1115 | getLayerId(garmin_data_p->privpkt)) { | |
1da177e4 LT |
1116 | |
1117 | dbg("%s - processing private request %d", | |
441b62c1 | 1118 | __func__, pktid); |
1da177e4 | 1119 | |
af6d780b | 1120 | /* drop all unfinished transfers */ |
1da177e4 LT |
1121 | garmin_clear(garmin_data_p); |
1122 | ||
af6d780b | 1123 | switch (pktid) { |
1da177e4 LT |
1124 | |
1125 | case PRIV_PKTID_SET_DEBUG: | |
1126 | if (pktsiz != 4) | |
1127 | return -EINVPKT; | |
1128 | debug = __le32_to_cpu(privpkt[3]); | |
1129 | dbg("%s - debug level set to 0x%X", | |
441b62c1 | 1130 | __func__, debug); |
1da177e4 LT |
1131 | break; |
1132 | ||
1133 | case PRIV_PKTID_SET_MODE: | |
1134 | if (pktsiz != 4) | |
1135 | return -EINVPKT; | |
1136 | garmin_data_p->mode = __le32_to_cpu(privpkt[3]); | |
1137 | dbg("%s - mode set to %d", | |
441b62c1 | 1138 | __func__, garmin_data_p->mode); |
1da177e4 LT |
1139 | break; |
1140 | ||
1141 | case PRIV_PKTID_INFO_REQ: | |
1142 | priv_status_resp(port); | |
1143 | break; | |
1144 | ||
1145 | case PRIV_PKTID_RESET_REQ: | |
b4072f46 | 1146 | process_resetdev_request(port); |
1da177e4 LT |
1147 | break; |
1148 | ||
1149 | case PRIV_PKTID_SET_DEF_MODE: | |
1150 | if (pktsiz != 4) | |
1151 | return -EINVPKT; | |
1152 | initial_mode = __le32_to_cpu(privpkt[3]); | |
1153 | dbg("%s - initial_mode set to %d", | |
441b62c1 | 1154 | __func__, |
1da177e4 LT |
1155 | garmin_data_p->mode); |
1156 | break; | |
1157 | } | |
1158 | return count; | |
1159 | } | |
1160 | } | |
1161 | ||
1162 | if (garmin_data_p->mode == MODE_GARMIN_SERIAL) { | |
1163 | return gsp_receive(garmin_data_p, buf, count); | |
1164 | } else { /* MODE_NATIVE */ | |
1165 | return nat_receive(garmin_data_p, buf, count); | |
1166 | } | |
1167 | } | |
1168 | ||
1169 | ||
95da310e | 1170 | static int garmin_write_room(struct tty_struct *tty) |
1da177e4 | 1171 | { |
95da310e | 1172 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1173 | /* |
1174 | * Report back the bytes currently available in the output buffer. | |
1175 | */ | |
af6d780b | 1176 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 LT |
1177 | return GPS_OUT_BUFSIZ-garmin_data_p->outsize; |
1178 | } | |
1179 | ||
1180 | ||
af6d780b | 1181 | static void garmin_read_process(struct garmin_data *garmin_data_p, |
b4026c45 HK |
1182 | unsigned char *data, unsigned data_length, |
1183 | int bulk_data) | |
1da177e4 | 1184 | { |
b4072f46 HK |
1185 | unsigned long flags; |
1186 | ||
1da177e4 LT |
1187 | if (garmin_data_p->flags & FLAGS_DROP_DATA) { |
1188 | /* abort-transfer cmd is actice */ | |
441b62c1 | 1189 | dbg("%s - pkt dropped", __func__); |
1da177e4 | 1190 | } else if (garmin_data_p->state != STATE_DISCONNECTED && |
af6d780b | 1191 | garmin_data_p->state != STATE_RESET) { |
1da177e4 | 1192 | |
1da177e4 | 1193 | /* if throttling is active or postprecessing is required |
eb6d8c2d | 1194 | put the received data in the input queue, otherwise |
1da177e4 LT |
1195 | send it directly to the tty port */ |
1196 | if (garmin_data_p->flags & FLAGS_QUEUING) { | |
1197 | pkt_add(garmin_data_p, data, data_length); | |
b4026c45 HK |
1198 | } else if (bulk_data || |
1199 | getLayerId(data) == GARMIN_LAYERID_APPL) { | |
b4072f46 HK |
1200 | |
1201 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
1202 | garmin_data_p->flags |= APP_RESP_SEEN; | |
1203 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
1204 | ||
1205 | if (garmin_data_p->mode == MODE_GARMIN_SERIAL) { | |
1da177e4 | 1206 | pkt_add(garmin_data_p, data, data_length); |
b4072f46 HK |
1207 | } else { |
1208 | send_to_tty(garmin_data_p->port, data, | |
1209 | data_length); | |
1210 | } | |
1da177e4 | 1211 | } |
b4072f46 | 1212 | /* ignore system layer packets ... */ |
1da177e4 LT |
1213 | } |
1214 | } | |
1215 | ||
1216 | ||
af6d780b | 1217 | static void garmin_read_bulk_callback(struct urb *urb) |
1da177e4 | 1218 | { |
eb6d8c2d | 1219 | unsigned long flags; |
cdc97792 | 1220 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1221 | struct usb_serial *serial = port->serial; |
af6d780b | 1222 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 1223 | unsigned char *data = urb->transfer_buffer; |
f9feb517 GKH |
1224 | int status = urb->status; |
1225 | int retval; | |
1da177e4 | 1226 | |
441b62c1 | 1227 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
1228 | |
1229 | if (!serial) { | |
441b62c1 | 1230 | dbg("%s - bad serial pointer, exiting", __func__); |
1da177e4 LT |
1231 | return; |
1232 | } | |
1233 | ||
f9feb517 | 1234 | if (status) { |
1da177e4 | 1235 | dbg("%s - nonzero read bulk status received: %d", |
441b62c1 | 1236 | __func__, status); |
1da177e4 LT |
1237 | return; |
1238 | } | |
1239 | ||
af6d780b | 1240 | usb_serial_debug_data(debug, &port->dev, |
441b62c1 | 1241 | __func__, urb->actual_length, data); |
1da177e4 | 1242 | |
b4026c45 | 1243 | garmin_read_process(garmin_data_p, data, urb->actual_length, 1); |
1da177e4 | 1244 | |
eb6d8c2d HK |
1245 | if (urb->actual_length == 0 && |
1246 | 0 != (garmin_data_p->flags & FLAGS_BULK_IN_RESTART)) { | |
1247 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
1248 | garmin_data_p->flags &= ~FLAGS_BULK_IN_RESTART; | |
1249 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
f9feb517 GKH |
1250 | retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1251 | if (retval) | |
1da177e4 LT |
1252 | dev_err(&port->dev, |
1253 | "%s - failed resubmitting read urb, error %d\n", | |
441b62c1 | 1254 | __func__, retval); |
eb6d8c2d HK |
1255 | } else if (urb->actual_length > 0) { |
1256 | /* Continue trying to read until nothing more is received */ | |
1257 | if (0 == (garmin_data_p->flags & FLAGS_THROTTLED)) { | |
f9feb517 GKH |
1258 | retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1259 | if (retval) | |
eb6d8c2d | 1260 | dev_err(&port->dev, |
f9feb517 | 1261 | "%s - failed resubmitting read urb, " |
441b62c1 | 1262 | "error %d\n", __func__, retval); |
eb6d8c2d HK |
1263 | } |
1264 | } else { | |
441b62c1 | 1265 | dbg("%s - end of bulk data", __func__); |
eb6d8c2d HK |
1266 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1267 | garmin_data_p->flags &= ~FLAGS_BULK_IN_ACTIVE; | |
1268 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
1da177e4 | 1269 | } |
1da177e4 LT |
1270 | } |
1271 | ||
1272 | ||
af6d780b | 1273 | static void garmin_read_int_callback(struct urb *urb) |
1da177e4 | 1274 | { |
eb6d8c2d | 1275 | unsigned long flags; |
f9feb517 | 1276 | int retval; |
cdc97792 | 1277 | struct usb_serial_port *port = urb->context; |
af6d780b | 1278 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 1279 | unsigned char *data = urb->transfer_buffer; |
f9feb517 | 1280 | int status = urb->status; |
1da177e4 | 1281 | |
f9feb517 | 1282 | switch (status) { |
1da177e4 LT |
1283 | case 0: |
1284 | /* success */ | |
1285 | break; | |
1286 | case -ECONNRESET: | |
1287 | case -ENOENT: | |
1288 | case -ESHUTDOWN: | |
1289 | /* this urb is terminated, clean up */ | |
1290 | dbg("%s - urb shutting down with status: %d", | |
441b62c1 | 1291 | __func__, status); |
1da177e4 LT |
1292 | return; |
1293 | default: | |
1294 | dbg("%s - nonzero urb status received: %d", | |
441b62c1 | 1295 | __func__, status); |
1da177e4 LT |
1296 | return; |
1297 | } | |
1298 | ||
441b62c1 | 1299 | usb_serial_debug_data(debug, &port->dev, __func__, |
1da177e4 LT |
1300 | urb->actual_length, urb->transfer_buffer); |
1301 | ||
1302 | if (urb->actual_length == sizeof(GARMIN_BULK_IN_AVAIL_REPLY) && | |
1303 | 0 == memcmp(data, GARMIN_BULK_IN_AVAIL_REPLY, | |
af6d780b | 1304 | sizeof(GARMIN_BULK_IN_AVAIL_REPLY))) { |
1da177e4 | 1305 | |
441b62c1 | 1306 | dbg("%s - bulk data available.", __func__); |
1da177e4 | 1307 | |
eb6d8c2d HK |
1308 | if (0 == (garmin_data_p->flags & FLAGS_BULK_IN_ACTIVE)) { |
1309 | ||
1310 | /* bulk data available */ | |
f9feb517 GKH |
1311 | retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1312 | if (retval) { | |
eb6d8c2d | 1313 | dev_err(&port->dev, |
af6d780b AC |
1314 | "%s - failed submitting read urb, error %d\n", |
1315 | __func__, retval); | |
eb6d8c2d HK |
1316 | } else { |
1317 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
1318 | garmin_data_p->flags |= FLAGS_BULK_IN_ACTIVE; | |
af6d780b AC |
1319 | spin_unlock_irqrestore(&garmin_data_p->lock, |
1320 | flags); | |
eb6d8c2d HK |
1321 | } |
1322 | } else { | |
1323 | /* bulk-in transfer still active */ | |
1324 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
1325 | garmin_data_p->flags |= FLAGS_BULK_IN_RESTART; | |
1326 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
1da177e4 LT |
1327 | } |
1328 | ||
1329 | } else if (urb->actual_length == (4+sizeof(GARMIN_START_SESSION_REPLY)) | |
1330 | && 0 == memcmp(data, GARMIN_START_SESSION_REPLY, | |
af6d780b | 1331 | sizeof(GARMIN_START_SESSION_REPLY))) { |
1da177e4 | 1332 | |
eb6d8c2d | 1333 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 | 1334 | garmin_data_p->flags |= FLAGS_SESSION_REPLY1_SEEN; |
eb6d8c2d | 1335 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 LT |
1336 | |
1337 | /* save the serial number */ | |
af6d780b AC |
1338 | garmin_data_p->serial_num = __le32_to_cpup( |
1339 | (__le32 *)(data+GARMIN_PKTHDR_LENGTH)); | |
1da177e4 LT |
1340 | |
1341 | dbg("%s - start-of-session reply seen - serial %u.", | |
441b62c1 | 1342 | __func__, garmin_data_p->serial_num); |
1da177e4 LT |
1343 | } |
1344 | ||
b4026c45 | 1345 | garmin_read_process(garmin_data_p, data, urb->actual_length, 0); |
1da177e4 | 1346 | |
af6d780b | 1347 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
f9feb517 | 1348 | if (retval) |
1da177e4 LT |
1349 | dev_err(&urb->dev->dev, |
1350 | "%s - Error %d submitting interrupt urb\n", | |
441b62c1 | 1351 | __func__, retval); |
1da177e4 LT |
1352 | } |
1353 | ||
1354 | ||
1355 | /* | |
1356 | * Sends the next queued packt to the tty port (garmin native mode only) | |
1357 | * and then sets a timer to call itself again until all queued data | |
1358 | * is sent. | |
1359 | */ | |
af6d780b | 1360 | static int garmin_flush_queue(struct garmin_data *garmin_data_p) |
1da177e4 | 1361 | { |
eb6d8c2d | 1362 | unsigned long flags; |
1da177e4 LT |
1363 | struct garmin_packet *pkt; |
1364 | ||
1365 | if ((garmin_data_p->flags & FLAGS_THROTTLED) == 0) { | |
1366 | pkt = pkt_pop(garmin_data_p); | |
1367 | if (pkt != NULL) { | |
1da177e4 LT |
1368 | send_to_tty(garmin_data_p->port, pkt->data, pkt->size); |
1369 | kfree(pkt); | |
1370 | mod_timer(&garmin_data_p->timer, (1)+jiffies); | |
1371 | ||
1372 | } else { | |
eb6d8c2d | 1373 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 | 1374 | garmin_data_p->flags &= ~FLAGS_QUEUING; |
eb6d8c2d | 1375 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 LT |
1376 | } |
1377 | } | |
1378 | return 0; | |
1379 | } | |
1380 | ||
1381 | ||
95da310e | 1382 | static void garmin_throttle(struct tty_struct *tty) |
1da177e4 | 1383 | { |
95da310e | 1384 | struct usb_serial_port *port = tty->driver_data; |
af6d780b | 1385 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 1386 | |
441b62c1 | 1387 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
1388 | /* set flag, data received will be put into a queue |
1389 | for later processing */ | |
63832515 | 1390 | spin_lock_irq(&garmin_data_p->lock); |
1da177e4 | 1391 | garmin_data_p->flags |= FLAGS_QUEUING|FLAGS_THROTTLED; |
63832515 | 1392 | spin_unlock_irq(&garmin_data_p->lock); |
1da177e4 LT |
1393 | } |
1394 | ||
1395 | ||
af6d780b | 1396 | static void garmin_unthrottle(struct tty_struct *tty) |
1da177e4 | 1397 | { |
95da310e | 1398 | struct usb_serial_port *port = tty->driver_data; |
af6d780b | 1399 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
eb6d8c2d | 1400 | int status; |
1da177e4 | 1401 | |
441b62c1 | 1402 | dbg("%s - port %d", __func__, port->number); |
63832515 | 1403 | spin_lock_irq(&garmin_data_p->lock); |
1da177e4 | 1404 | garmin_data_p->flags &= ~FLAGS_THROTTLED; |
63832515 | 1405 | spin_unlock_irq(&garmin_data_p->lock); |
1da177e4 LT |
1406 | |
1407 | /* in native mode send queued data to tty, in | |
1408 | serial mode nothing needs to be done here */ | |
1409 | if (garmin_data_p->mode == MODE_NATIVE) | |
1410 | garmin_flush_queue(garmin_data_p); | |
eb6d8c2d HK |
1411 | |
1412 | if (0 != (garmin_data_p->flags & FLAGS_BULK_IN_ACTIVE)) { | |
63832515 | 1413 | status = usb_submit_urb(port->read_urb, GFP_KERNEL); |
eb6d8c2d HK |
1414 | if (status) |
1415 | dev_err(&port->dev, | |
1416 | "%s - failed resubmitting read urb, error %d\n", | |
441b62c1 | 1417 | __func__, status); |
eb6d8c2d | 1418 | } |
1da177e4 LT |
1419 | } |
1420 | ||
1da177e4 LT |
1421 | /* |
1422 | * The timer is currently only used to send queued packets to | |
1423 | * the tty in cases where the protocol provides no own handshaking | |
1424 | * to initiate the transfer. | |
1425 | */ | |
1426 | static void timeout_handler(unsigned long data) | |
1427 | { | |
1428 | struct garmin_data *garmin_data_p = (struct garmin_data *) data; | |
1429 | ||
1430 | /* send the next queued packet to the tty port */ | |
1431 | if (garmin_data_p->mode == MODE_NATIVE) | |
1432 | if (garmin_data_p->flags & FLAGS_QUEUING) | |
1433 | garmin_flush_queue(garmin_data_p); | |
1434 | } | |
1435 | ||
1436 | ||
1437 | ||
95da310e | 1438 | static int garmin_attach(struct usb_serial *serial) |
1da177e4 LT |
1439 | { |
1440 | int status = 0; | |
1441 | struct usb_serial_port *port = serial->port[0]; | |
af6d780b | 1442 | struct garmin_data *garmin_data_p = NULL; |
1da177e4 | 1443 | |
441b62c1 | 1444 | dbg("%s", __func__); |
1da177e4 | 1445 | |
7ac9da10 | 1446 | garmin_data_p = kzalloc(sizeof(struct garmin_data), GFP_KERNEL); |
1da177e4 | 1447 | if (garmin_data_p == NULL) { |
441b62c1 | 1448 | dev_err(&port->dev, "%s - Out of memory\n", __func__); |
1da177e4 LT |
1449 | return -ENOMEM; |
1450 | } | |
1da177e4 LT |
1451 | init_timer(&garmin_data_p->timer); |
1452 | spin_lock_init(&garmin_data_p->lock); | |
1453 | INIT_LIST_HEAD(&garmin_data_p->pktlist); | |
af6d780b | 1454 | /* garmin_data_p->timer.expires = jiffies + session_timeout; */ |
1da177e4 LT |
1455 | garmin_data_p->timer.data = (unsigned long)garmin_data_p; |
1456 | garmin_data_p->timer.function = timeout_handler; | |
1457 | garmin_data_p->port = port; | |
1458 | garmin_data_p->state = 0; | |
b4026c45 | 1459 | garmin_data_p->flags = 0; |
1da177e4 LT |
1460 | garmin_data_p->count = 0; |
1461 | usb_set_serial_port_data(port, garmin_data_p); | |
1462 | ||
1463 | status = garmin_init_session(port); | |
1464 | ||
1465 | return status; | |
1466 | } | |
1467 | ||
1468 | ||
f9c99bb8 | 1469 | static void garmin_disconnect(struct usb_serial *serial) |
1da177e4 LT |
1470 | { |
1471 | struct usb_serial_port *port = serial->port[0]; | |
af6d780b | 1472 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 1473 | |
441b62c1 | 1474 | dbg("%s", __func__); |
1da177e4 | 1475 | |
af6d780b | 1476 | usb_kill_urb(port->interrupt_in_urb); |
1da177e4 | 1477 | del_timer_sync(&garmin_data_p->timer); |
f9c99bb8 AS |
1478 | } |
1479 | ||
1480 | ||
1481 | static void garmin_release(struct usb_serial *serial) | |
1482 | { | |
1483 | struct usb_serial_port *port = serial->port[0]; | |
1484 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); | |
1485 | ||
1486 | dbg("%s", __func__); | |
1487 | ||
af6d780b | 1488 | kfree(garmin_data_p); |
1da177e4 LT |
1489 | } |
1490 | ||
1491 | ||
1da177e4 | 1492 | /* All of the device info needed */ |
ea65370d | 1493 | static struct usb_serial_driver garmin_device = { |
18fcac35 | 1494 | .driver = { |
eb6d8c2d HK |
1495 | .owner = THIS_MODULE, |
1496 | .name = "garmin_gps", | |
18fcac35 | 1497 | }, |
eb6d8c2d | 1498 | .description = "Garmin GPS usb/tty", |
1da177e4 | 1499 | .id_table = id_table, |
1da177e4 LT |
1500 | .num_ports = 1, |
1501 | .open = garmin_open, | |
1502 | .close = garmin_close, | |
1503 | .throttle = garmin_throttle, | |
1504 | .unthrottle = garmin_unthrottle, | |
1505 | .attach = garmin_attach, | |
f9c99bb8 AS |
1506 | .disconnect = garmin_disconnect, |
1507 | .release = garmin_release, | |
1da177e4 LT |
1508 | .write = garmin_write, |
1509 | .write_room = garmin_write_room, | |
1da177e4 LT |
1510 | .write_bulk_callback = garmin_write_bulk_callback, |
1511 | .read_bulk_callback = garmin_read_bulk_callback, | |
1512 | .read_int_callback = garmin_read_int_callback, | |
1513 | }; | |
1514 | ||
97b6b6d2 AS |
1515 | static struct usb_serial_driver * const serial_drivers[] = { |
1516 | &garmin_device, NULL | |
1517 | }; | |
1da177e4 | 1518 | |
db62c081 | 1519 | module_usb_serial_driver(garmin_driver, serial_drivers); |
1da177e4 | 1520 | |
af6d780b AC |
1521 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1522 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1523 | MODULE_LICENSE("GPL"); |
1524 | ||
1525 | module_param(debug, bool, S_IWUSR | S_IRUGO); | |
1526 | MODULE_PARM_DESC(debug, "Debug enabled or not"); | |
1527 | module_param(initial_mode, int, S_IRUGO); | |
1528 | MODULE_PARM_DESC(initial_mode, "Initial mode"); |