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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 */ | |
af6d780b | 45 | static int 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, | |
eb6d8c2d | 227 | .no_dynamic_id = 1, |
1da177e4 LT |
228 | }; |
229 | ||
230 | ||
1da177e4 LT |
231 | static inline int getLayerId(const __u8 *usbPacket) |
232 | { | |
233 | return __le32_to_cpup((__le32 *)(usbPacket)); | |
234 | } | |
235 | ||
236 | static inline int getPacketId(const __u8 *usbPacket) | |
237 | { | |
238 | return __le32_to_cpup((__le32 *)(usbPacket+4)); | |
239 | } | |
240 | ||
241 | static inline int getDataLength(const __u8 *usbPacket) | |
242 | { | |
243 | return __le32_to_cpup((__le32 *)(usbPacket+8)); | |
244 | } | |
245 | ||
246 | ||
247 | /* | |
248 | * check if the usb-packet in buf contains an abort-transfer command. | |
249 | * (if yes, all queued data will be dropped) | |
250 | */ | |
251 | static inline int isAbortTrfCmnd(const unsigned char *buf) | |
252 | { | |
af6d780b AC |
253 | if (0 == memcmp(buf, GARMIN_STOP_TRANSFER_REQ, |
254 | sizeof(GARMIN_STOP_TRANSFER_REQ)) || | |
255 | 0 == memcmp(buf, GARMIN_STOP_TRANSFER_REQ_V2, | |
256 | sizeof(GARMIN_STOP_TRANSFER_REQ_V2))) | |
1da177e4 LT |
257 | return 1; |
258 | else | |
259 | return 0; | |
260 | } | |
261 | ||
262 | ||
263 | ||
264 | static void send_to_tty(struct usb_serial_port *port, | |
eb6d8c2d | 265 | char *data, unsigned int actual_length) |
1da177e4 | 266 | { |
4a90f09b | 267 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
1da177e4 LT |
268 | |
269 | if (tty && actual_length) { | |
270 | ||
af6d780b | 271 | usb_serial_debug_data(debug, &port->dev, |
441b62c1 | 272 | __func__, actual_length, data); |
1da177e4 | 273 | |
33f0f88f | 274 | tty_insert_flip_string(tty, data, actual_length); |
1da177e4 LT |
275 | tty_flip_buffer_push(tty); |
276 | } | |
4a90f09b | 277 | tty_kref_put(tty); |
1da177e4 LT |
278 | } |
279 | ||
280 | ||
281 | /****************************************************************************** | |
282 | * packet queue handling | |
283 | ******************************************************************************/ | |
284 | ||
285 | /* | |
286 | * queue a received (usb-)packet for later processing | |
287 | */ | |
af6d780b | 288 | static int pkt_add(struct garmin_data *garmin_data_p, |
eb6d8c2d | 289 | unsigned char *data, unsigned int data_length) |
1da177e4 | 290 | { |
eb6d8c2d | 291 | int state = 0; |
1da177e4 LT |
292 | int result = 0; |
293 | unsigned long flags; | |
294 | struct garmin_packet *pkt; | |
295 | ||
296 | /* process only packets containg data ... */ | |
297 | if (data_length) { | |
1da177e4 | 298 | pkt = kmalloc(sizeof(struct garmin_packet)+data_length, |
af6d780b | 299 | GFP_ATOMIC); |
1da177e4 LT |
300 | if (pkt == NULL) { |
301 | dev_err(&garmin_data_p->port->dev, "out of memory\n"); | |
302 | return 0; | |
303 | } | |
304 | pkt->size = data_length; | |
305 | memcpy(pkt->data, data, data_length); | |
306 | ||
307 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
eb6d8c2d | 308 | garmin_data_p->flags |= FLAGS_QUEUING; |
1da177e4 LT |
309 | result = list_empty(&garmin_data_p->pktlist); |
310 | pkt->seq = garmin_data_p->seq_counter++; | |
311 | list_add_tail(&pkt->list, &garmin_data_p->pktlist); | |
eb6d8c2d | 312 | state = garmin_data_p->state; |
1da177e4 LT |
313 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
314 | ||
b4072f46 HK |
315 | dbg("%s - added: pkt: %d - %d bytes", |
316 | __func__, pkt->seq, data_length); | |
317 | ||
1da177e4 | 318 | /* in serial mode, if someone is waiting for data from |
b4072f46 | 319 | the device, convert and send the next packet to tty. */ |
af6d780b | 320 | if (result && (state == STATE_GSP_WAIT_DATA)) |
1da177e4 | 321 | gsp_next_packet(garmin_data_p); |
1da177e4 LT |
322 | } |
323 | return result; | |
324 | } | |
325 | ||
326 | ||
327 | /* get the next pending packet */ | |
af6d780b | 328 | static struct garmin_packet *pkt_pop(struct garmin_data *garmin_data_p) |
1da177e4 LT |
329 | { |
330 | unsigned long flags; | |
331 | struct garmin_packet *result = NULL; | |
332 | ||
333 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
334 | if (!list_empty(&garmin_data_p->pktlist)) { | |
335 | result = (struct garmin_packet *)garmin_data_p->pktlist.next; | |
336 | list_del(&result->list); | |
337 | } | |
338 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
339 | return result; | |
340 | } | |
341 | ||
342 | ||
343 | /* free up all queued data */ | |
af6d780b | 344 | static void pkt_clear(struct garmin_data *garmin_data_p) |
1da177e4 LT |
345 | { |
346 | unsigned long flags; | |
347 | struct garmin_packet *result = NULL; | |
348 | ||
441b62c1 | 349 | dbg("%s", __func__); |
1da177e4 LT |
350 | |
351 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
352 | while (!list_empty(&garmin_data_p->pktlist)) { | |
353 | result = (struct garmin_packet *)garmin_data_p->pktlist.next; | |
354 | list_del(&result->list); | |
355 | kfree(result); | |
356 | } | |
357 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
358 | } | |
359 | ||
360 | ||
361 | /****************************************************************************** | |
362 | * garmin serial protocol handling handling | |
363 | ******************************************************************************/ | |
364 | ||
365 | /* send an ack packet back to the tty */ | |
af6d780b | 366 | static int gsp_send_ack(struct garmin_data *garmin_data_p, __u8 pkt_id) |
1da177e4 LT |
367 | { |
368 | __u8 pkt[10]; | |
eb6d8c2d HK |
369 | __u8 cksum = 0; |
370 | __u8 *ptr = pkt; | |
371 | unsigned l = 0; | |
1da177e4 | 372 | |
441b62c1 | 373 | dbg("%s - pkt-id: 0x%X.", __func__, 0xFF & pkt_id); |
1da177e4 LT |
374 | |
375 | *ptr++ = DLE; | |
376 | *ptr++ = ACK; | |
377 | cksum += ACK; | |
378 | ||
379 | *ptr++ = 2; | |
380 | cksum += 2; | |
381 | ||
382 | *ptr++ = pkt_id; | |
383 | cksum += pkt_id; | |
384 | ||
af6d780b | 385 | if (pkt_id == DLE) |
1da177e4 | 386 | *ptr++ = DLE; |
1da177e4 LT |
387 | |
388 | *ptr++ = 0; | |
389 | *ptr++ = 0xFF & (-cksum); | |
390 | *ptr++ = DLE; | |
391 | *ptr++ = ETX; | |
392 | ||
393 | l = ptr-pkt; | |
394 | ||
395 | send_to_tty(garmin_data_p->port, pkt, l); | |
396 | return 0; | |
397 | } | |
398 | ||
399 | ||
400 | ||
401 | /* | |
402 | * called for a complete packet received from tty layer | |
403 | * | |
b4072f46 | 404 | * the complete packet (pktid ... cksum) is in garmin_data_p->inbuf starting |
1da177e4 LT |
405 | * at GSP_INITIAL_OFFSET. |
406 | * | |
407 | * count - number of bytes in the input buffer including space reserved for | |
af6d780b | 408 | * the usb header: GSP_INITIAL_OFFSET + number of bytes in packet |
1da177e4 LT |
409 | * (including pkt-id, data-length a. cksum) |
410 | */ | |
af6d780b | 411 | static int gsp_rec_packet(struct garmin_data *garmin_data_p, int count) |
1da177e4 | 412 | { |
b4026c45 | 413 | unsigned long flags; |
af6d780b | 414 | const __u8 *recpkt = garmin_data_p->inbuffer+GSP_INITIAL_OFFSET; |
eb6d8c2d | 415 | __le32 *usbdata = (__le32 *) garmin_data_p->inbuffer; |
1da177e4 LT |
416 | |
417 | int cksum = 0; | |
418 | int n = 0; | |
419 | int pktid = recpkt[0]; | |
420 | int size = recpkt[1]; | |
421 | ||
422 | usb_serial_debug_data(debug, &garmin_data_p->port->dev, | |
441b62c1 | 423 | __func__, count-GSP_INITIAL_OFFSET, recpkt); |
1da177e4 LT |
424 | |
425 | if (size != (count-GSP_INITIAL_OFFSET-3)) { | |
426 | dbg("%s - invalid size, expected %d bytes, got %d", | |
441b62c1 | 427 | __func__, size, (count-GSP_INITIAL_OFFSET-3)); |
1da177e4 LT |
428 | return -EINVPKT; |
429 | } | |
430 | ||
431 | cksum += *recpkt++; | |
432 | cksum += *recpkt++; | |
433 | ||
af6d780b AC |
434 | /* sanity check, remove after test ... */ |
435 | if ((__u8 *)&(usbdata[3]) != recpkt) { | |
1da177e4 | 436 | dbg("%s - ptr mismatch %p - %p", |
441b62c1 | 437 | __func__, &(usbdata[4]), recpkt); |
1da177e4 LT |
438 | return -EINVPKT; |
439 | } | |
440 | ||
441 | while (n < size) { | |
442 | cksum += *recpkt++; | |
443 | n++; | |
444 | } | |
445 | ||
eb6d8c2d HK |
446 | if ((0xff & (cksum + *recpkt)) != 0) { |
447 | dbg("%s - invalid checksum, expected %02x, got %02x", | |
441b62c1 | 448 | __func__, 0xff & -cksum, 0xff & *recpkt); |
eb6d8c2d HK |
449 | return -EINVPKT; |
450 | } | |
1da177e4 LT |
451 | |
452 | usbdata[0] = __cpu_to_le32(GARMIN_LAYERID_APPL); | |
453 | usbdata[1] = __cpu_to_le32(pktid); | |
454 | usbdata[2] = __cpu_to_le32(size); | |
455 | ||
af6d780b | 456 | garmin_write_bulk(garmin_data_p->port, garmin_data_p->inbuffer, |
468d1362 | 457 | GARMIN_PKTHDR_LENGTH+size, 0); |
1da177e4 LT |
458 | |
459 | /* if this was an abort-transfer command, flush all | |
460 | queued data. */ | |
461 | if (isAbortTrfCmnd(garmin_data_p->inbuffer)) { | |
b4026c45 | 462 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 | 463 | garmin_data_p->flags |= FLAGS_DROP_DATA; |
b4026c45 | 464 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 LT |
465 | pkt_clear(garmin_data_p); |
466 | } | |
467 | ||
468 | return count; | |
469 | } | |
470 | ||
471 | ||
472 | ||
473 | /* | |
474 | * Called for data received from tty | |
475 | * | |
476 | * buf contains the data read, it may span more than one packet or even | |
477 | * incomplete packets | |
478 | * | |
479 | * input record should be a serial-record, but it may not be complete. | |
480 | * Copy it into our local buffer, until an etx is seen (or an error | |
481 | * occurs). | |
482 | * Once the record is complete, convert into a usb packet and send it | |
483 | * to the bulk pipe, send an ack back to the tty. | |
484 | * | |
485 | * If the input is an ack, just send the last queued packet to the | |
486 | * tty layer. | |
487 | * | |
488 | * if the input is an abort command, drop all queued data. | |
489 | */ | |
490 | ||
af6d780b | 491 | static int gsp_receive(struct garmin_data *garmin_data_p, |
eb6d8c2d | 492 | const unsigned char *buf, int count) |
1da177e4 | 493 | { |
eb6d8c2d | 494 | unsigned long flags; |
1da177e4 LT |
495 | int offs = 0; |
496 | int ack_or_nak_seen = 0; | |
eb6d8c2d HK |
497 | __u8 *dest; |
498 | int size; | |
af6d780b | 499 | /* dleSeen: set if last byte read was a DLE */ |
eb6d8c2d | 500 | int dleSeen; |
af6d780b AC |
501 | /* skip: if set, skip incoming data until possible start of |
502 | * new packet | |
503 | */ | |
eb6d8c2d | 504 | int skip; |
1da177e4 LT |
505 | __u8 data; |
506 | ||
eb6d8c2d HK |
507 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
508 | dest = garmin_data_p->inbuffer; | |
509 | size = garmin_data_p->insize; | |
510 | dleSeen = garmin_data_p->flags & FLAGS_GSP_DLESEEN; | |
511 | skip = garmin_data_p->flags & FLAGS_GSP_SKIP; | |
512 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
513 | ||
b4072f46 HK |
514 | /* dbg("%s - dle=%d skip=%d size=%d count=%d", |
515 | __func__, dleSeen, skip, size, count); */ | |
1da177e4 | 516 | |
af6d780b | 517 | if (size == 0) |
1da177e4 | 518 | size = GSP_INITIAL_OFFSET; |
1da177e4 LT |
519 | |
520 | while (offs < count) { | |
521 | ||
522 | data = *(buf+offs); | |
af6d780b | 523 | offs++; |
1da177e4 LT |
524 | |
525 | if (data == DLE) { | |
526 | if (skip) { /* start of a new pkt */ | |
527 | skip = 0; | |
528 | size = GSP_INITIAL_OFFSET; | |
529 | dleSeen = 1; | |
530 | } else if (dleSeen) { | |
531 | dest[size++] = data; | |
532 | dleSeen = 0; | |
533 | } else { | |
534 | dleSeen = 1; | |
535 | } | |
536 | } else if (data == ETX) { | |
537 | if (dleSeen) { | |
538 | /* packet complete */ | |
539 | ||
540 | data = dest[GSP_INITIAL_OFFSET]; | |
541 | ||
542 | if (data == ACK) { | |
543 | ack_or_nak_seen = ACK; | |
544 | dbg("ACK packet complete."); | |
545 | } else if (data == NAK) { | |
546 | ack_or_nak_seen = NAK; | |
547 | dbg("NAK packet complete."); | |
548 | } else { | |
af6d780b AC |
549 | dbg("packet complete - id=0x%X.", |
550 | 0xFF & data); | |
1da177e4 LT |
551 | gsp_rec_packet(garmin_data_p, size); |
552 | } | |
553 | ||
554 | skip = 1; | |
555 | size = GSP_INITIAL_OFFSET; | |
556 | dleSeen = 0; | |
557 | } else { | |
558 | dest[size++] = data; | |
559 | } | |
560 | } else if (!skip) { | |
561 | ||
562 | if (dleSeen) { | |
1da177e4 LT |
563 | size = GSP_INITIAL_OFFSET; |
564 | dleSeen = 0; | |
565 | } | |
566 | ||
567 | dest[size++] = data; | |
568 | } | |
569 | ||
570 | if (size >= GPS_IN_BUFSIZ) { | |
441b62c1 | 571 | dbg("%s - packet too large.", __func__); |
1da177e4 LT |
572 | skip = 1; |
573 | size = GSP_INITIAL_OFFSET; | |
574 | dleSeen = 0; | |
575 | } | |
576 | } | |
577 | ||
eb6d8c2d HK |
578 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
579 | ||
1da177e4 LT |
580 | garmin_data_p->insize = size; |
581 | ||
af6d780b | 582 | /* copy flags back to structure */ |
1da177e4 LT |
583 | if (skip) |
584 | garmin_data_p->flags |= FLAGS_GSP_SKIP; | |
585 | else | |
586 | garmin_data_p->flags &= ~FLAGS_GSP_SKIP; | |
587 | ||
588 | if (dleSeen) | |
589 | garmin_data_p->flags |= FLAGS_GSP_DLESEEN; | |
590 | else | |
591 | garmin_data_p->flags &= ~FLAGS_GSP_DLESEEN; | |
592 | ||
eb6d8c2d HK |
593 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
594 | ||
b4072f46 HK |
595 | if (ack_or_nak_seen) { |
596 | if (gsp_next_packet(garmin_data_p) > 0) | |
597 | garmin_data_p->state = STATE_ACTIVE; | |
598 | else | |
599 | garmin_data_p->state = STATE_GSP_WAIT_DATA; | |
600 | } | |
1da177e4 LT |
601 | return count; |
602 | } | |
603 | ||
604 | ||
605 | ||
1da177e4 LT |
606 | /* |
607 | * Sends a usb packet to the tty | |
608 | * | |
609 | * Assumes, that all packages and at an usb-packet boundary. | |
610 | * | |
611 | * return <0 on error, 0 if packet is incomplete or > 0 if packet was sent | |
612 | */ | |
af6d780b | 613 | static int gsp_send(struct garmin_data *garmin_data_p, |
1da177e4 LT |
614 | const unsigned char *buf, int count) |
615 | { | |
616 | const unsigned char *src; | |
617 | unsigned char *dst; | |
618 | int pktid = 0; | |
619 | int datalen = 0; | |
620 | int cksum = 0; | |
af6d780b | 621 | int i = 0; |
1da177e4 LT |
622 | int k; |
623 | ||
441b62c1 | 624 | dbg("%s - state %d - %d bytes.", __func__, |
af6d780b | 625 | garmin_data_p->state, count); |
1da177e4 LT |
626 | |
627 | k = garmin_data_p->outsize; | |
628 | if ((k+count) > GPS_OUT_BUFSIZ) { | |
629 | dbg("packet too large"); | |
630 | garmin_data_p->outsize = 0; | |
631 | return -4; | |
632 | } | |
633 | ||
634 | memcpy(garmin_data_p->outbuffer+k, buf, count); | |
635 | k += count; | |
636 | garmin_data_p->outsize = k; | |
637 | ||
638 | if (k >= GARMIN_PKTHDR_LENGTH) { | |
639 | pktid = getPacketId(garmin_data_p->outbuffer); | |
af6d780b | 640 | datalen = getDataLength(garmin_data_p->outbuffer); |
1da177e4 LT |
641 | i = GARMIN_PKTHDR_LENGTH + datalen; |
642 | if (k < i) | |
643 | return 0; | |
644 | } else { | |
645 | return 0; | |
646 | } | |
647 | ||
af6d780b | 648 | dbg("%s - %d bytes in buffer, %d bytes in pkt.", __func__, k, i); |
1da177e4 LT |
649 | |
650 | /* garmin_data_p->outbuffer now contains a complete packet */ | |
651 | ||
652 | usb_serial_debug_data(debug, &garmin_data_p->port->dev, | |
af6d780b | 653 | __func__, k, garmin_data_p->outbuffer); |
1da177e4 LT |
654 | |
655 | garmin_data_p->outsize = 0; | |
656 | ||
657 | if (GARMIN_LAYERID_APPL != getLayerId(garmin_data_p->outbuffer)) { | |
af6d780b AC |
658 | dbg("not an application packet (%d)", |
659 | getLayerId(garmin_data_p->outbuffer)); | |
1da177e4 LT |
660 | return -1; |
661 | } | |
662 | ||
663 | if (pktid > 255) { | |
664 | dbg("packet-id %d too large", pktid); | |
665 | return -2; | |
666 | } | |
667 | ||
668 | if (datalen > 255) { | |
669 | dbg("packet-size %d too large", datalen); | |
670 | return -3; | |
671 | } | |
672 | ||
673 | /* the serial protocol should be able to handle this packet */ | |
674 | ||
675 | k = 0; | |
676 | src = garmin_data_p->outbuffer+GARMIN_PKTHDR_LENGTH; | |
af6d780b | 677 | for (i = 0; i < datalen; i++) { |
1da177e4 LT |
678 | if (*src++ == DLE) |
679 | k++; | |
680 | } | |
681 | ||
682 | src = garmin_data_p->outbuffer+GARMIN_PKTHDR_LENGTH; | |
683 | if (k > (GARMIN_PKTHDR_LENGTH-2)) { | |
af6d780b | 684 | /* can't add stuffing DLEs in place, move data to end |
eb6d8c2d | 685 | of buffer ... */ |
1da177e4 LT |
686 | dst = garmin_data_p->outbuffer+GPS_OUT_BUFSIZ-datalen; |
687 | memcpy(dst, src, datalen); | |
688 | src = dst; | |
689 | } | |
690 | ||
691 | dst = garmin_data_p->outbuffer; | |
692 | ||
693 | *dst++ = DLE; | |
694 | *dst++ = pktid; | |
695 | cksum += pktid; | |
696 | *dst++ = datalen; | |
697 | cksum += datalen; | |
698 | if (datalen == DLE) | |
699 | *dst++ = DLE; | |
700 | ||
af6d780b | 701 | for (i = 0; i < datalen; i++) { |
1da177e4 LT |
702 | __u8 c = *src++; |
703 | *dst++ = c; | |
704 | cksum += c; | |
705 | if (c == DLE) | |
706 | *dst++ = DLE; | |
707 | } | |
af6d780b | 708 | |
1da177e4 LT |
709 | cksum = 0xFF & -cksum; |
710 | *dst++ = cksum; | |
711 | if (cksum == DLE) | |
712 | *dst++ = DLE; | |
713 | *dst++ = DLE; | |
714 | *dst++ = ETX; | |
715 | ||
716 | i = dst-garmin_data_p->outbuffer; | |
717 | ||
718 | send_to_tty(garmin_data_p->port, garmin_data_p->outbuffer, i); | |
719 | ||
720 | garmin_data_p->pkt_id = pktid; | |
721 | garmin_data_p->state = STATE_WAIT_TTY_ACK; | |
722 | ||
723 | return i; | |
724 | } | |
725 | ||
726 | ||
1da177e4 LT |
727 | /* |
728 | * Process the next pending data packet - if there is one | |
729 | */ | |
b4072f46 | 730 | static int gsp_next_packet(struct garmin_data *garmin_data_p) |
1da177e4 | 731 | { |
b4072f46 | 732 | int result = 0; |
1da177e4 LT |
733 | struct garmin_packet *pkt = NULL; |
734 | ||
735 | while ((pkt = pkt_pop(garmin_data_p)) != NULL) { | |
441b62c1 | 736 | dbg("%s - next pkt: %d", __func__, pkt->seq); |
b4072f46 HK |
737 | result = gsp_send(garmin_data_p, pkt->data, pkt->size); |
738 | if (result > 0) { | |
1da177e4 | 739 | kfree(pkt); |
b4072f46 | 740 | return result; |
1da177e4 LT |
741 | } |
742 | kfree(pkt); | |
743 | } | |
b4072f46 | 744 | return result; |
1da177e4 LT |
745 | } |
746 | ||
747 | ||
748 | ||
1da177e4 LT |
749 | /****************************************************************************** |
750 | * garmin native mode | |
751 | ******************************************************************************/ | |
752 | ||
753 | ||
754 | /* | |
755 | * Called for data received from tty | |
756 | * | |
757 | * The input data is expected to be in garmin usb-packet format. | |
758 | * | |
759 | * buf contains the data read, it may span more than one packet | |
760 | * or even incomplete packets | |
761 | */ | |
af6d780b | 762 | static int nat_receive(struct garmin_data *garmin_data_p, |
eb6d8c2d | 763 | const unsigned char *buf, int count) |
1da177e4 | 764 | { |
eb6d8c2d | 765 | unsigned long flags; |
af6d780b | 766 | __u8 *dest; |
1da177e4 LT |
767 | int offs = 0; |
768 | int result = count; | |
769 | int len; | |
770 | ||
771 | while (offs < count) { | |
af6d780b | 772 | /* if buffer contains header, copy rest of data */ |
1da177e4 LT |
773 | if (garmin_data_p->insize >= GARMIN_PKTHDR_LENGTH) |
774 | len = GARMIN_PKTHDR_LENGTH | |
775 | +getDataLength(garmin_data_p->inbuffer); | |
776 | else | |
777 | len = GARMIN_PKTHDR_LENGTH; | |
778 | ||
779 | if (len >= GPS_IN_BUFSIZ) { | |
af6d780b AC |
780 | /* seems to be an invalid packet, ignore rest |
781 | of input */ | |
782 | dbg("%s - packet size too large: %d", __func__, len); | |
1da177e4 LT |
783 | garmin_data_p->insize = 0; |
784 | count = 0; | |
785 | result = -EINVPKT; | |
786 | } else { | |
787 | len -= garmin_data_p->insize; | |
788 | if (len > (count-offs)) | |
789 | len = (count-offs); | |
790 | if (len > 0) { | |
791 | dest = garmin_data_p->inbuffer | |
af6d780b | 792 | + garmin_data_p->insize; |
1da177e4 LT |
793 | memcpy(dest, buf+offs, len); |
794 | garmin_data_p->insize += len; | |
795 | offs += len; | |
796 | } | |
797 | } | |
798 | ||
799 | /* do we have a complete packet ? */ | |
800 | if (garmin_data_p->insize >= GARMIN_PKTHDR_LENGTH) { | |
801 | len = GARMIN_PKTHDR_LENGTH+ | |
802 | getDataLength(garmin_data_p->inbuffer); | |
803 | if (garmin_data_p->insize >= len) { | |
af6d780b AC |
804 | garmin_write_bulk(garmin_data_p->port, |
805 | garmin_data_p->inbuffer, | |
806 | len, 0); | |
1da177e4 LT |
807 | garmin_data_p->insize = 0; |
808 | ||
809 | /* if this was an abort-transfer command, | |
810 | flush all queued data. */ | |
811 | if (isAbortTrfCmnd(garmin_data_p->inbuffer)) { | |
af6d780b AC |
812 | spin_lock_irqsave(&garmin_data_p->lock, |
813 | flags); | |
1da177e4 | 814 | garmin_data_p->flags |= FLAGS_DROP_DATA; |
af6d780b AC |
815 | spin_unlock_irqrestore( |
816 | &garmin_data_p->lock, flags); | |
1da177e4 LT |
817 | pkt_clear(garmin_data_p); |
818 | } | |
819 | } | |
820 | } | |
821 | } | |
822 | return result; | |
823 | } | |
824 | ||
825 | ||
826 | /****************************************************************************** | |
827 | * private packets | |
828 | ******************************************************************************/ | |
829 | ||
830 | static void priv_status_resp(struct usb_serial_port *port) | |
831 | { | |
af6d780b | 832 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 LT |
833 | __le32 *pkt = (__le32 *)garmin_data_p->privpkt; |
834 | ||
835 | pkt[0] = __cpu_to_le32(GARMIN_LAYERID_PRIVATE); | |
836 | pkt[1] = __cpu_to_le32(PRIV_PKTID_INFO_RESP); | |
837 | pkt[2] = __cpu_to_le32(12); | |
838 | pkt[3] = __cpu_to_le32(VERSION_MAJOR << 16 | VERSION_MINOR); | |
839 | pkt[4] = __cpu_to_le32(garmin_data_p->mode); | |
840 | pkt[5] = __cpu_to_le32(garmin_data_p->serial_num); | |
841 | ||
af6d780b | 842 | send_to_tty(port, (__u8 *)pkt, 6 * 4); |
1da177e4 LT |
843 | } |
844 | ||
845 | ||
846 | /****************************************************************************** | |
847 | * Garmin specific driver functions | |
848 | ******************************************************************************/ | |
849 | ||
850 | static int process_resetdev_request(struct usb_serial_port *port) | |
851 | { | |
eb6d8c2d | 852 | unsigned long flags; |
1da177e4 | 853 | int status; |
af6d780b | 854 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 855 | |
eb6d8c2d | 856 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 LT |
857 | garmin_data_p->flags &= ~(CLEAR_HALT_REQUIRED); |
858 | garmin_data_p->state = STATE_RESET; | |
859 | garmin_data_p->serial_num = 0; | |
eb6d8c2d | 860 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 | 861 | |
af6d780b AC |
862 | usb_kill_urb(port->interrupt_in_urb); |
863 | dbg("%s - usb_reset_device", __func__); | |
1da177e4 LT |
864 | status = usb_reset_device(port->serial->dev); |
865 | if (status) | |
866 | dbg("%s - usb_reset_device failed: %d", | |
441b62c1 | 867 | __func__, status); |
1da177e4 LT |
868 | return status; |
869 | } | |
870 | ||
871 | ||
872 | ||
873 | /* | |
874 | * clear all cached data | |
875 | */ | |
af6d780b | 876 | static int garmin_clear(struct garmin_data *garmin_data_p) |
1da177e4 | 877 | { |
eb6d8c2d | 878 | unsigned long flags; |
1da177e4 LT |
879 | int status = 0; |
880 | ||
1da177e4 LT |
881 | /* flush all queued data */ |
882 | pkt_clear(garmin_data_p); | |
883 | ||
eb6d8c2d | 884 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 LT |
885 | garmin_data_p->insize = 0; |
886 | garmin_data_p->outsize = 0; | |
eb6d8c2d | 887 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 LT |
888 | |
889 | return status; | |
890 | } | |
891 | ||
892 | ||
1da177e4 LT |
893 | static int garmin_init_session(struct usb_serial_port *port) |
894 | { | |
895 | struct usb_serial *serial = port->serial; | |
af6d780b | 896 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 897 | int status = 0; |
b4072f46 | 898 | int i = 0; |
1da177e4 LT |
899 | |
900 | if (status == 0) { | |
af6d780b | 901 | usb_kill_urb(port->interrupt_in_urb); |
1da177e4 | 902 | |
441b62c1 | 903 | dbg("%s - adding interrupt input", __func__); |
1da177e4 LT |
904 | port->interrupt_in_urb->dev = serial->dev; |
905 | status = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); | |
906 | if (status) | |
907 | dev_err(&serial->dev->dev, | |
af6d780b AC |
908 | "%s - failed submitting interrupt urb, error %d\n", |
909 | __func__, status); | |
1da177e4 LT |
910 | } |
911 | ||
b4072f46 HK |
912 | /* |
913 | * using the initialization method from gpsbabel. See comments in | |
914 | * gpsbabel/jeeps/gpslibusb.c gusb_reset_toggles() | |
915 | */ | |
1da177e4 | 916 | if (status == 0) { |
441b62c1 | 917 | dbg("%s - starting session ...", __func__); |
1da177e4 | 918 | garmin_data_p->state = STATE_ACTIVE; |
1da177e4 | 919 | |
b4072f46 | 920 | for (i = 0; i < 3; i++) { |
1da177e4 | 921 | status = garmin_write_bulk(port, |
b4072f46 HK |
922 | GARMIN_START_SESSION_REQ, |
923 | sizeof(GARMIN_START_SESSION_REQ), 0); | |
924 | ||
925 | if (status < 0) | |
926 | break; | |
1da177e4 | 927 | } |
b4072f46 HK |
928 | |
929 | if (status > 0) | |
930 | status = 0; | |
1da177e4 LT |
931 | } |
932 | ||
933 | return status; | |
934 | } | |
935 | ||
936 | ||
937 | ||
a509a7e4 | 938 | static int garmin_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 | 939 | { |
eb6d8c2d | 940 | unsigned long flags; |
1da177e4 | 941 | int status = 0; |
af6d780b | 942 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 943 | |
441b62c1 | 944 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 945 | |
eb6d8c2d | 946 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 LT |
947 | garmin_data_p->mode = initial_mode; |
948 | garmin_data_p->count = 0; | |
b4026c45 | 949 | garmin_data_p->flags &= FLAGS_SESSION_REPLY1_SEEN; |
eb6d8c2d | 950 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 LT |
951 | |
952 | /* shutdown any bulk reads that might be going on */ | |
af6d780b AC |
953 | usb_kill_urb(port->write_urb); |
954 | usb_kill_urb(port->read_urb); | |
1da177e4 | 955 | |
95da310e | 956 | if (garmin_data_p->state == STATE_RESET) |
1da177e4 | 957 | status = garmin_init_session(port); |
1da177e4 LT |
958 | |
959 | garmin_data_p->state = STATE_ACTIVE; | |
1da177e4 LT |
960 | return status; |
961 | } | |
962 | ||
963 | ||
335f8514 | 964 | static void garmin_close(struct usb_serial_port *port) |
1da177e4 LT |
965 | { |
966 | struct usb_serial *serial = port->serial; | |
af6d780b | 967 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 968 | |
441b62c1 | 969 | dbg("%s - port %d - mode=%d state=%d flags=0x%X", __func__, |
1da177e4 LT |
970 | port->number, garmin_data_p->mode, |
971 | garmin_data_p->state, garmin_data_p->flags); | |
972 | ||
973 | if (!serial) | |
974 | return; | |
975 | ||
95bef012 | 976 | mutex_lock(&port->serial->disc_mutex); |
b4072f46 | 977 | |
95bef012 ON |
978 | if (!port->serial->disconnected) |
979 | garmin_clear(garmin_data_p); | |
1da177e4 LT |
980 | |
981 | /* shutdown our urbs */ | |
af6d780b AC |
982 | usb_kill_urb(port->read_urb); |
983 | usb_kill_urb(port->write_urb); | |
1da177e4 | 984 | |
b4072f46 HK |
985 | /* keep reset state so we know that we must start a new session */ |
986 | if (garmin_data_p->state != STATE_RESET) | |
1da177e4 | 987 | garmin_data_p->state = STATE_DISCONNECTED; |
b4072f46 | 988 | |
95bef012 | 989 | mutex_unlock(&port->serial->disc_mutex); |
1da177e4 LT |
990 | } |
991 | ||
b4072f46 | 992 | |
af6d780b | 993 | static void garmin_write_bulk_callback(struct urb *urb) |
1da177e4 | 994 | { |
cdc97792 | 995 | struct usb_serial_port *port = urb->context; |
1da177e4 | 996 | |
468d1362 | 997 | if (port) { |
af6d780b AC |
998 | struct garmin_data *garmin_data_p = |
999 | usb_get_serial_port_data(port); | |
1da177e4 | 1000 | |
441b62c1 | 1001 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1002 | |
b4072f46 | 1003 | if (GARMIN_LAYERID_APPL == getLayerId(urb->transfer_buffer)) { |
468d1362 | 1004 | |
b4072f46 HK |
1005 | if (garmin_data_p->mode == MODE_GARMIN_SERIAL) { |
1006 | gsp_send_ack(garmin_data_p, | |
1007 | ((__u8 *)urb->transfer_buffer)[4]); | |
1008 | } | |
468d1362 | 1009 | } |
468d1362 | 1010 | usb_serial_port_softint(port); |
1da177e4 LT |
1011 | } |
1012 | ||
af6d780b AC |
1013 | /* Ignore errors that resulted from garmin_write_bulk with |
1014 | dismiss_ack = 1 */ | |
468d1362 HK |
1015 | |
1016 | /* free up the transfer buffer, as usb_free_urb() does not do this */ | |
af6d780b | 1017 | kfree(urb->transfer_buffer); |
1da177e4 LT |
1018 | } |
1019 | ||
1020 | ||
af6d780b | 1021 | static int garmin_write_bulk(struct usb_serial_port *port, |
468d1362 HK |
1022 | const unsigned char *buf, int count, |
1023 | int dismiss_ack) | |
1da177e4 | 1024 | { |
eb6d8c2d | 1025 | unsigned long flags; |
1da177e4 | 1026 | struct usb_serial *serial = port->serial; |
af6d780b | 1027 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 LT |
1028 | struct urb *urb; |
1029 | unsigned char *buffer; | |
1030 | int status; | |
1031 | ||
441b62c1 | 1032 | dbg("%s - port %d, state %d", __func__, port->number, |
1da177e4 LT |
1033 | garmin_data_p->state); |
1034 | ||
eb6d8c2d | 1035 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 | 1036 | garmin_data_p->flags &= ~FLAGS_DROP_DATA; |
eb6d8c2d | 1037 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 | 1038 | |
af6d780b | 1039 | buffer = kmalloc(count, GFP_ATOMIC); |
1da177e4 LT |
1040 | if (!buffer) { |
1041 | dev_err(&port->dev, "out of memory\n"); | |
1042 | return -ENOMEM; | |
1043 | } | |
1044 | ||
1045 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
1046 | if (!urb) { | |
1047 | dev_err(&port->dev, "no more free urbs\n"); | |
af6d780b | 1048 | kfree(buffer); |
1da177e4 LT |
1049 | return -ENOMEM; |
1050 | } | |
1051 | ||
af6d780b | 1052 | memcpy(buffer, buf, count); |
1da177e4 | 1053 | |
441b62c1 | 1054 | usb_serial_debug_data(debug, &port->dev, __func__, count, buffer); |
1da177e4 | 1055 | |
af6d780b AC |
1056 | usb_fill_bulk_urb(urb, serial->dev, |
1057 | usb_sndbulkpipe(serial->dev, | |
1058 | port->bulk_out_endpointAddress), | |
1da177e4 | 1059 | buffer, count, |
468d1362 HK |
1060 | garmin_write_bulk_callback, |
1061 | dismiss_ack ? NULL : port); | |
1da177e4 LT |
1062 | urb->transfer_flags |= URB_ZERO_PACKET; |
1063 | ||
1064 | if (GARMIN_LAYERID_APPL == getLayerId(buffer)) { | |
b4072f46 HK |
1065 | |
1066 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
1067 | garmin_data_p->flags |= APP_REQ_SEEN; | |
1068 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
1069 | ||
1da177e4 LT |
1070 | if (garmin_data_p->mode == MODE_GARMIN_SERIAL) { |
1071 | pkt_clear(garmin_data_p); | |
1072 | garmin_data_p->state = STATE_GSP_WAIT_DATA; | |
1073 | } | |
1074 | } | |
1075 | ||
1076 | /* send it down the pipe */ | |
1077 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
1078 | if (status) { | |
1079 | dev_err(&port->dev, | |
af6d780b | 1080 | "%s - usb_submit_urb(write bulk) failed with status = %d\n", |
441b62c1 | 1081 | __func__, status); |
1da177e4 | 1082 | count = status; |
1da177e4 LT |
1083 | } |
1084 | ||
1085 | /* we are done with this urb, so let the host driver | |
1086 | * really free it when it is finished with it */ | |
af6d780b | 1087 | usb_free_urb(urb); |
1da177e4 LT |
1088 | |
1089 | return count; | |
1090 | } | |
1091 | ||
af6d780b | 1092 | static int garmin_write(struct tty_struct *tty, struct usb_serial_port *port, |
95da310e | 1093 | const unsigned char *buf, int count) |
1da177e4 LT |
1094 | { |
1095 | int pktid, pktsiz, len; | |
af6d780b | 1096 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 LT |
1097 | __le32 *privpkt = (__le32 *)garmin_data_p->privpkt; |
1098 | ||
441b62c1 | 1099 | usb_serial_debug_data(debug, &port->dev, __func__, count, buf); |
1da177e4 | 1100 | |
b4072f46 HK |
1101 | if (garmin_data_p->state == STATE_RESET) |
1102 | return -EIO; | |
1103 | ||
1da177e4 LT |
1104 | /* check for our private packets */ |
1105 | if (count >= GARMIN_PKTHDR_LENGTH) { | |
1da177e4 LT |
1106 | len = PRIVPKTSIZ; |
1107 | if (count < len) | |
1108 | len = count; | |
1109 | ||
1110 | memcpy(garmin_data_p->privpkt, buf, len); | |
1111 | ||
1112 | pktsiz = getDataLength(garmin_data_p->privpkt); | |
1113 | pktid = getPacketId(garmin_data_p->privpkt); | |
1114 | ||
1115 | if (count == (GARMIN_PKTHDR_LENGTH+pktsiz) | |
af6d780b AC |
1116 | && GARMIN_LAYERID_PRIVATE == |
1117 | getLayerId(garmin_data_p->privpkt)) { | |
1da177e4 LT |
1118 | |
1119 | dbg("%s - processing private request %d", | |
441b62c1 | 1120 | __func__, pktid); |
1da177e4 | 1121 | |
af6d780b | 1122 | /* drop all unfinished transfers */ |
1da177e4 LT |
1123 | garmin_clear(garmin_data_p); |
1124 | ||
af6d780b | 1125 | switch (pktid) { |
1da177e4 LT |
1126 | |
1127 | case PRIV_PKTID_SET_DEBUG: | |
1128 | if (pktsiz != 4) | |
1129 | return -EINVPKT; | |
1130 | debug = __le32_to_cpu(privpkt[3]); | |
1131 | dbg("%s - debug level set to 0x%X", | |
441b62c1 | 1132 | __func__, debug); |
1da177e4 LT |
1133 | break; |
1134 | ||
1135 | case PRIV_PKTID_SET_MODE: | |
1136 | if (pktsiz != 4) | |
1137 | return -EINVPKT; | |
1138 | garmin_data_p->mode = __le32_to_cpu(privpkt[3]); | |
1139 | dbg("%s - mode set to %d", | |
441b62c1 | 1140 | __func__, garmin_data_p->mode); |
1da177e4 LT |
1141 | break; |
1142 | ||
1143 | case PRIV_PKTID_INFO_REQ: | |
1144 | priv_status_resp(port); | |
1145 | break; | |
1146 | ||
1147 | case PRIV_PKTID_RESET_REQ: | |
b4072f46 | 1148 | process_resetdev_request(port); |
1da177e4 LT |
1149 | break; |
1150 | ||
1151 | case PRIV_PKTID_SET_DEF_MODE: | |
1152 | if (pktsiz != 4) | |
1153 | return -EINVPKT; | |
1154 | initial_mode = __le32_to_cpu(privpkt[3]); | |
1155 | dbg("%s - initial_mode set to %d", | |
441b62c1 | 1156 | __func__, |
1da177e4 LT |
1157 | garmin_data_p->mode); |
1158 | break; | |
1159 | } | |
1160 | return count; | |
1161 | } | |
1162 | } | |
1163 | ||
1164 | if (garmin_data_p->mode == MODE_GARMIN_SERIAL) { | |
1165 | return gsp_receive(garmin_data_p, buf, count); | |
1166 | } else { /* MODE_NATIVE */ | |
1167 | return nat_receive(garmin_data_p, buf, count); | |
1168 | } | |
1169 | } | |
1170 | ||
1171 | ||
95da310e | 1172 | static int garmin_write_room(struct tty_struct *tty) |
1da177e4 | 1173 | { |
95da310e | 1174 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1175 | /* |
1176 | * Report back the bytes currently available in the output buffer. | |
1177 | */ | |
af6d780b | 1178 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 LT |
1179 | return GPS_OUT_BUFSIZ-garmin_data_p->outsize; |
1180 | } | |
1181 | ||
1182 | ||
af6d780b | 1183 | static void garmin_read_process(struct garmin_data *garmin_data_p, |
b4026c45 HK |
1184 | unsigned char *data, unsigned data_length, |
1185 | int bulk_data) | |
1da177e4 | 1186 | { |
b4072f46 HK |
1187 | unsigned long flags; |
1188 | ||
1da177e4 LT |
1189 | if (garmin_data_p->flags & FLAGS_DROP_DATA) { |
1190 | /* abort-transfer cmd is actice */ | |
441b62c1 | 1191 | dbg("%s - pkt dropped", __func__); |
1da177e4 | 1192 | } else if (garmin_data_p->state != STATE_DISCONNECTED && |
af6d780b | 1193 | garmin_data_p->state != STATE_RESET) { |
1da177e4 | 1194 | |
1da177e4 | 1195 | /* if throttling is active or postprecessing is required |
eb6d8c2d | 1196 | put the received data in the input queue, otherwise |
1da177e4 LT |
1197 | send it directly to the tty port */ |
1198 | if (garmin_data_p->flags & FLAGS_QUEUING) { | |
1199 | pkt_add(garmin_data_p, data, data_length); | |
b4026c45 HK |
1200 | } else if (bulk_data || |
1201 | getLayerId(data) == GARMIN_LAYERID_APPL) { | |
b4072f46 HK |
1202 | |
1203 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
1204 | garmin_data_p->flags |= APP_RESP_SEEN; | |
1205 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
1206 | ||
1207 | if (garmin_data_p->mode == MODE_GARMIN_SERIAL) { | |
1da177e4 | 1208 | pkt_add(garmin_data_p, data, data_length); |
b4072f46 HK |
1209 | } else { |
1210 | send_to_tty(garmin_data_p->port, data, | |
1211 | data_length); | |
1212 | } | |
1da177e4 | 1213 | } |
b4072f46 | 1214 | /* ignore system layer packets ... */ |
1da177e4 LT |
1215 | } |
1216 | } | |
1217 | ||
1218 | ||
af6d780b | 1219 | static void garmin_read_bulk_callback(struct urb *urb) |
1da177e4 | 1220 | { |
eb6d8c2d | 1221 | unsigned long flags; |
cdc97792 | 1222 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1223 | struct usb_serial *serial = port->serial; |
af6d780b | 1224 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 1225 | unsigned char *data = urb->transfer_buffer; |
f9feb517 GKH |
1226 | int status = urb->status; |
1227 | int retval; | |
1da177e4 | 1228 | |
441b62c1 | 1229 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
1230 | |
1231 | if (!serial) { | |
441b62c1 | 1232 | dbg("%s - bad serial pointer, exiting", __func__); |
1da177e4 LT |
1233 | return; |
1234 | } | |
1235 | ||
f9feb517 | 1236 | if (status) { |
1da177e4 | 1237 | dbg("%s - nonzero read bulk status received: %d", |
441b62c1 | 1238 | __func__, status); |
1da177e4 LT |
1239 | return; |
1240 | } | |
1241 | ||
af6d780b | 1242 | usb_serial_debug_data(debug, &port->dev, |
441b62c1 | 1243 | __func__, urb->actual_length, data); |
1da177e4 | 1244 | |
b4026c45 | 1245 | garmin_read_process(garmin_data_p, data, urb->actual_length, 1); |
1da177e4 | 1246 | |
eb6d8c2d HK |
1247 | if (urb->actual_length == 0 && |
1248 | 0 != (garmin_data_p->flags & FLAGS_BULK_IN_RESTART)) { | |
1249 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
1250 | garmin_data_p->flags &= ~FLAGS_BULK_IN_RESTART; | |
1251 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
f9feb517 GKH |
1252 | retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1253 | if (retval) | |
1da177e4 LT |
1254 | dev_err(&port->dev, |
1255 | "%s - failed resubmitting read urb, error %d\n", | |
441b62c1 | 1256 | __func__, retval); |
eb6d8c2d HK |
1257 | } else if (urb->actual_length > 0) { |
1258 | /* Continue trying to read until nothing more is received */ | |
1259 | if (0 == (garmin_data_p->flags & FLAGS_THROTTLED)) { | |
f9feb517 GKH |
1260 | retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1261 | if (retval) | |
eb6d8c2d | 1262 | dev_err(&port->dev, |
f9feb517 | 1263 | "%s - failed resubmitting read urb, " |
441b62c1 | 1264 | "error %d\n", __func__, retval); |
eb6d8c2d HK |
1265 | } |
1266 | } else { | |
441b62c1 | 1267 | dbg("%s - end of bulk data", __func__); |
eb6d8c2d HK |
1268 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1269 | garmin_data_p->flags &= ~FLAGS_BULK_IN_ACTIVE; | |
1270 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
1da177e4 | 1271 | } |
1da177e4 LT |
1272 | } |
1273 | ||
1274 | ||
af6d780b | 1275 | static void garmin_read_int_callback(struct urb *urb) |
1da177e4 | 1276 | { |
eb6d8c2d | 1277 | unsigned long flags; |
f9feb517 | 1278 | int retval; |
cdc97792 | 1279 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1280 | struct usb_serial *serial = port->serial; |
af6d780b | 1281 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 1282 | unsigned char *data = urb->transfer_buffer; |
f9feb517 | 1283 | int status = urb->status; |
1da177e4 | 1284 | |
f9feb517 | 1285 | switch (status) { |
1da177e4 LT |
1286 | case 0: |
1287 | /* success */ | |
1288 | break; | |
1289 | case -ECONNRESET: | |
1290 | case -ENOENT: | |
1291 | case -ESHUTDOWN: | |
1292 | /* this urb is terminated, clean up */ | |
1293 | dbg("%s - urb shutting down with status: %d", | |
441b62c1 | 1294 | __func__, status); |
1da177e4 LT |
1295 | return; |
1296 | default: | |
1297 | dbg("%s - nonzero urb status received: %d", | |
441b62c1 | 1298 | __func__, status); |
1da177e4 LT |
1299 | return; |
1300 | } | |
1301 | ||
441b62c1 | 1302 | usb_serial_debug_data(debug, &port->dev, __func__, |
1da177e4 LT |
1303 | urb->actual_length, urb->transfer_buffer); |
1304 | ||
1305 | if (urb->actual_length == sizeof(GARMIN_BULK_IN_AVAIL_REPLY) && | |
1306 | 0 == memcmp(data, GARMIN_BULK_IN_AVAIL_REPLY, | |
af6d780b | 1307 | sizeof(GARMIN_BULK_IN_AVAIL_REPLY))) { |
1da177e4 | 1308 | |
441b62c1 | 1309 | dbg("%s - bulk data available.", __func__); |
1da177e4 | 1310 | |
eb6d8c2d HK |
1311 | if (0 == (garmin_data_p->flags & FLAGS_BULK_IN_ACTIVE)) { |
1312 | ||
1313 | /* bulk data available */ | |
af6d780b AC |
1314 | usb_fill_bulk_urb(port->read_urb, serial->dev, |
1315 | usb_rcvbulkpipe(serial->dev, | |
1316 | port->bulk_in_endpointAddress), | |
eb6d8c2d HK |
1317 | port->read_urb->transfer_buffer, |
1318 | port->read_urb->transfer_buffer_length, | |
1319 | garmin_read_bulk_callback, port); | |
f9feb517 GKH |
1320 | retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1321 | if (retval) { | |
eb6d8c2d | 1322 | dev_err(&port->dev, |
af6d780b AC |
1323 | "%s - failed submitting read urb, error %d\n", |
1324 | __func__, retval); | |
eb6d8c2d HK |
1325 | } else { |
1326 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
1327 | garmin_data_p->flags |= FLAGS_BULK_IN_ACTIVE; | |
af6d780b AC |
1328 | spin_unlock_irqrestore(&garmin_data_p->lock, |
1329 | flags); | |
eb6d8c2d HK |
1330 | } |
1331 | } else { | |
1332 | /* bulk-in transfer still active */ | |
1333 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
1334 | garmin_data_p->flags |= FLAGS_BULK_IN_RESTART; | |
1335 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
1da177e4 LT |
1336 | } |
1337 | ||
1338 | } else if (urb->actual_length == (4+sizeof(GARMIN_START_SESSION_REPLY)) | |
1339 | && 0 == memcmp(data, GARMIN_START_SESSION_REPLY, | |
af6d780b | 1340 | sizeof(GARMIN_START_SESSION_REPLY))) { |
1da177e4 | 1341 | |
eb6d8c2d | 1342 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 | 1343 | garmin_data_p->flags |= FLAGS_SESSION_REPLY1_SEEN; |
eb6d8c2d | 1344 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 LT |
1345 | |
1346 | /* save the serial number */ | |
af6d780b AC |
1347 | garmin_data_p->serial_num = __le32_to_cpup( |
1348 | (__le32 *)(data+GARMIN_PKTHDR_LENGTH)); | |
1da177e4 LT |
1349 | |
1350 | dbg("%s - start-of-session reply seen - serial %u.", | |
441b62c1 | 1351 | __func__, garmin_data_p->serial_num); |
1da177e4 LT |
1352 | } |
1353 | ||
b4026c45 | 1354 | garmin_read_process(garmin_data_p, data, urb->actual_length, 0); |
1da177e4 LT |
1355 | |
1356 | port->interrupt_in_urb->dev = port->serial->dev; | |
af6d780b | 1357 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
f9feb517 | 1358 | if (retval) |
1da177e4 LT |
1359 | dev_err(&urb->dev->dev, |
1360 | "%s - Error %d submitting interrupt urb\n", | |
441b62c1 | 1361 | __func__, retval); |
1da177e4 LT |
1362 | } |
1363 | ||
1364 | ||
1365 | /* | |
1366 | * Sends the next queued packt to the tty port (garmin native mode only) | |
1367 | * and then sets a timer to call itself again until all queued data | |
1368 | * is sent. | |
1369 | */ | |
af6d780b | 1370 | static int garmin_flush_queue(struct garmin_data *garmin_data_p) |
1da177e4 | 1371 | { |
eb6d8c2d | 1372 | unsigned long flags; |
1da177e4 LT |
1373 | struct garmin_packet *pkt; |
1374 | ||
1375 | if ((garmin_data_p->flags & FLAGS_THROTTLED) == 0) { | |
1376 | pkt = pkt_pop(garmin_data_p); | |
1377 | if (pkt != NULL) { | |
1da177e4 LT |
1378 | send_to_tty(garmin_data_p->port, pkt->data, pkt->size); |
1379 | kfree(pkt); | |
1380 | mod_timer(&garmin_data_p->timer, (1)+jiffies); | |
1381 | ||
1382 | } else { | |
eb6d8c2d | 1383 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 | 1384 | garmin_data_p->flags &= ~FLAGS_QUEUING; |
eb6d8c2d | 1385 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 LT |
1386 | } |
1387 | } | |
1388 | return 0; | |
1389 | } | |
1390 | ||
1391 | ||
95da310e | 1392 | static void garmin_throttle(struct tty_struct *tty) |
1da177e4 | 1393 | { |
95da310e | 1394 | struct usb_serial_port *port = tty->driver_data; |
af6d780b | 1395 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 1396 | |
441b62c1 | 1397 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
1398 | /* set flag, data received will be put into a queue |
1399 | for later processing */ | |
63832515 | 1400 | spin_lock_irq(&garmin_data_p->lock); |
1da177e4 | 1401 | garmin_data_p->flags |= FLAGS_QUEUING|FLAGS_THROTTLED; |
63832515 | 1402 | spin_unlock_irq(&garmin_data_p->lock); |
1da177e4 LT |
1403 | } |
1404 | ||
1405 | ||
af6d780b | 1406 | static void garmin_unthrottle(struct tty_struct *tty) |
1da177e4 | 1407 | { |
95da310e | 1408 | struct usb_serial_port *port = tty->driver_data; |
af6d780b | 1409 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
eb6d8c2d | 1410 | int status; |
1da177e4 | 1411 | |
441b62c1 | 1412 | dbg("%s - port %d", __func__, port->number); |
63832515 | 1413 | spin_lock_irq(&garmin_data_p->lock); |
1da177e4 | 1414 | garmin_data_p->flags &= ~FLAGS_THROTTLED; |
63832515 | 1415 | spin_unlock_irq(&garmin_data_p->lock); |
1da177e4 LT |
1416 | |
1417 | /* in native mode send queued data to tty, in | |
1418 | serial mode nothing needs to be done here */ | |
1419 | if (garmin_data_p->mode == MODE_NATIVE) | |
1420 | garmin_flush_queue(garmin_data_p); | |
eb6d8c2d HK |
1421 | |
1422 | if (0 != (garmin_data_p->flags & FLAGS_BULK_IN_ACTIVE)) { | |
63832515 | 1423 | status = usb_submit_urb(port->read_urb, GFP_KERNEL); |
eb6d8c2d HK |
1424 | if (status) |
1425 | dev_err(&port->dev, | |
1426 | "%s - failed resubmitting read urb, error %d\n", | |
441b62c1 | 1427 | __func__, status); |
eb6d8c2d | 1428 | } |
1da177e4 LT |
1429 | } |
1430 | ||
1da177e4 LT |
1431 | /* |
1432 | * The timer is currently only used to send queued packets to | |
1433 | * the tty in cases where the protocol provides no own handshaking | |
1434 | * to initiate the transfer. | |
1435 | */ | |
1436 | static void timeout_handler(unsigned long data) | |
1437 | { | |
1438 | struct garmin_data *garmin_data_p = (struct garmin_data *) data; | |
1439 | ||
1440 | /* send the next queued packet to the tty port */ | |
1441 | if (garmin_data_p->mode == MODE_NATIVE) | |
1442 | if (garmin_data_p->flags & FLAGS_QUEUING) | |
1443 | garmin_flush_queue(garmin_data_p); | |
1444 | } | |
1445 | ||
1446 | ||
1447 | ||
95da310e | 1448 | static int garmin_attach(struct usb_serial *serial) |
1da177e4 LT |
1449 | { |
1450 | int status = 0; | |
1451 | struct usb_serial_port *port = serial->port[0]; | |
af6d780b | 1452 | struct garmin_data *garmin_data_p = NULL; |
1da177e4 | 1453 | |
441b62c1 | 1454 | dbg("%s", __func__); |
1da177e4 | 1455 | |
7ac9da10 | 1456 | garmin_data_p = kzalloc(sizeof(struct garmin_data), GFP_KERNEL); |
1da177e4 | 1457 | if (garmin_data_p == NULL) { |
441b62c1 | 1458 | dev_err(&port->dev, "%s - Out of memory\n", __func__); |
1da177e4 LT |
1459 | return -ENOMEM; |
1460 | } | |
1da177e4 LT |
1461 | init_timer(&garmin_data_p->timer); |
1462 | spin_lock_init(&garmin_data_p->lock); | |
1463 | INIT_LIST_HEAD(&garmin_data_p->pktlist); | |
af6d780b | 1464 | /* garmin_data_p->timer.expires = jiffies + session_timeout; */ |
1da177e4 LT |
1465 | garmin_data_p->timer.data = (unsigned long)garmin_data_p; |
1466 | garmin_data_p->timer.function = timeout_handler; | |
1467 | garmin_data_p->port = port; | |
1468 | garmin_data_p->state = 0; | |
b4026c45 | 1469 | garmin_data_p->flags = 0; |
1da177e4 LT |
1470 | garmin_data_p->count = 0; |
1471 | usb_set_serial_port_data(port, garmin_data_p); | |
1472 | ||
1473 | status = garmin_init_session(port); | |
1474 | ||
1475 | return status; | |
1476 | } | |
1477 | ||
1478 | ||
f9c99bb8 | 1479 | static void garmin_disconnect(struct usb_serial *serial) |
1da177e4 LT |
1480 | { |
1481 | struct usb_serial_port *port = serial->port[0]; | |
af6d780b | 1482 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 1483 | |
441b62c1 | 1484 | dbg("%s", __func__); |
1da177e4 | 1485 | |
af6d780b | 1486 | usb_kill_urb(port->interrupt_in_urb); |
1da177e4 | 1487 | del_timer_sync(&garmin_data_p->timer); |
f9c99bb8 AS |
1488 | } |
1489 | ||
1490 | ||
1491 | static void garmin_release(struct usb_serial *serial) | |
1492 | { | |
1493 | struct usb_serial_port *port = serial->port[0]; | |
1494 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); | |
1495 | ||
1496 | dbg("%s", __func__); | |
1497 | ||
af6d780b | 1498 | kfree(garmin_data_p); |
1da177e4 LT |
1499 | } |
1500 | ||
1501 | ||
1da177e4 | 1502 | /* All of the device info needed */ |
ea65370d | 1503 | static struct usb_serial_driver garmin_device = { |
18fcac35 | 1504 | .driver = { |
eb6d8c2d HK |
1505 | .owner = THIS_MODULE, |
1506 | .name = "garmin_gps", | |
18fcac35 | 1507 | }, |
eb6d8c2d | 1508 | .description = "Garmin GPS usb/tty", |
d9b1b787 | 1509 | .usb_driver = &garmin_driver, |
1da177e4 | 1510 | .id_table = id_table, |
1da177e4 LT |
1511 | .num_ports = 1, |
1512 | .open = garmin_open, | |
1513 | .close = garmin_close, | |
1514 | .throttle = garmin_throttle, | |
1515 | .unthrottle = garmin_unthrottle, | |
1516 | .attach = garmin_attach, | |
f9c99bb8 AS |
1517 | .disconnect = garmin_disconnect, |
1518 | .release = garmin_release, | |
1da177e4 LT |
1519 | .write = garmin_write, |
1520 | .write_room = garmin_write_room, | |
1da177e4 LT |
1521 | .write_bulk_callback = garmin_write_bulk_callback, |
1522 | .read_bulk_callback = garmin_read_bulk_callback, | |
1523 | .read_int_callback = garmin_read_int_callback, | |
1524 | }; | |
1525 | ||
1526 | ||
eb6d8c2d | 1527 | |
af6d780b | 1528 | static int __init garmin_init(void) |
1da177e4 LT |
1529 | { |
1530 | int retval; | |
1531 | ||
1532 | retval = usb_serial_register(&garmin_device); | |
1533 | if (retval) | |
1534 | goto failed_garmin_register; | |
1535 | retval = usb_register(&garmin_driver); | |
1536 | if (retval) | |
1537 | goto failed_usb_register; | |
c197a8db GKH |
1538 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
1539 | DRIVER_DESC "\n"); | |
1da177e4 LT |
1540 | |
1541 | return 0; | |
1542 | failed_usb_register: | |
1543 | usb_serial_deregister(&garmin_device); | |
1544 | failed_garmin_register: | |
1545 | return retval; | |
1546 | } | |
1547 | ||
1548 | ||
af6d780b | 1549 | static void __exit garmin_exit(void) |
1da177e4 | 1550 | { |
af6d780b AC |
1551 | usb_deregister(&garmin_driver); |
1552 | usb_serial_deregister(&garmin_device); | |
1da177e4 LT |
1553 | } |
1554 | ||
1555 | ||
1556 | ||
1557 | ||
1558 | module_init(garmin_init); | |
1559 | module_exit(garmin_exit); | |
1560 | ||
af6d780b AC |
1561 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1562 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1563 | MODULE_LICENSE("GPL"); |
1564 | ||
1565 | module_param(debug, bool, S_IWUSR | S_IRUGO); | |
1566 | MODULE_PARM_DESC(debug, "Debug enabled or not"); | |
1567 | module_param(initial_mode, int, S_IRUGO); | |
1568 | MODULE_PARM_DESC(initial_mode, "Initial mode"); | |
1569 |