Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Garmin GPS driver | |
3 | * | |
468d1362 | 4 | * Copyright (C) 2006,2007 Hermann Kneissel herkne@users.sourceforge.net |
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> |
468d1362 | 37 | #include <asm/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 | |
468d1362 | 54 | #define VERSION_MINOR 31 |
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; | |
132 | __u8 ignorePkts; | |
133 | __u8 count; | |
134 | __u8 pkt_id; | |
135 | __u32 serial_num; | |
136 | struct timer_list timer; | |
137 | struct usb_serial_port *port; | |
138 | int seq_counter; | |
139 | int insize; | |
140 | int outsize; | |
141 | __u8 inbuffer [GPS_IN_BUFSIZ]; /* tty -> usb */ | |
142 | __u8 outbuffer[GPS_OUT_BUFSIZ]; /* usb -> tty */ | |
143 | __u8 privpkt[4*6]; | |
468d1362 HK |
144 | atomic_t req_count; |
145 | atomic_t resp_count; | |
1da177e4 LT |
146 | spinlock_t lock; |
147 | struct list_head pktlist; | |
148 | }; | |
149 | ||
150 | ||
151 | #define STATE_NEW 0 | |
152 | #define STATE_INITIAL_DELAY 1 | |
153 | #define STATE_TIMEOUT 2 | |
154 | #define STATE_SESSION_REQ1 3 | |
155 | #define STATE_SESSION_REQ2 4 | |
156 | #define STATE_ACTIVE 5 | |
157 | ||
158 | #define STATE_RESET 8 | |
159 | #define STATE_DISCONNECTED 9 | |
160 | #define STATE_WAIT_TTY_ACK 10 | |
161 | #define STATE_GSP_WAIT_DATA 11 | |
162 | ||
163 | #define MODE_NATIVE 0 | |
164 | #define MODE_GARMIN_SERIAL 1 | |
165 | ||
af6d780b | 166 | /* Flags used in garmin_data.flags: */ |
1da177e4 LT |
167 | #define FLAGS_SESSION_REPLY_MASK 0x00C0 |
168 | #define FLAGS_SESSION_REPLY1_SEEN 0x0080 | |
169 | #define FLAGS_SESSION_REPLY2_SEEN 0x0040 | |
170 | #define FLAGS_BULK_IN_ACTIVE 0x0020 | |
eb6d8c2d HK |
171 | #define FLAGS_BULK_IN_RESTART 0x0010 |
172 | #define FLAGS_THROTTLED 0x0008 | |
1da177e4 LT |
173 | #define CLEAR_HALT_REQUIRED 0x0001 |
174 | ||
175 | #define FLAGS_QUEUING 0x0100 | |
1da177e4 LT |
176 | #define FLAGS_DROP_DATA 0x0800 |
177 | ||
178 | #define FLAGS_GSP_SKIP 0x1000 | |
179 | #define FLAGS_GSP_DLESEEN 0x2000 | |
180 | ||
181 | ||
182 | ||
183 | ||
184 | ||
185 | ||
186 | /* function prototypes */ | |
af6d780b | 187 | static void gsp_next_packet(struct garmin_data *garmin_data_p); |
1da177e4 | 188 | static int garmin_write_bulk(struct usb_serial_port *port, |
468d1362 HK |
189 | const unsigned char *buf, int count, |
190 | int dismiss_ack); | |
1da177e4 LT |
191 | |
192 | /* some special packets to be send or received */ | |
193 | static unsigned char const GARMIN_START_SESSION_REQ[] | |
194 | = { 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0 }; | |
195 | static unsigned char const GARMIN_START_SESSION_REQ2[] | |
196 | = { 0, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0 }; | |
197 | static unsigned char const GARMIN_START_SESSION_REPLY[] | |
198 | = { 0, 0, 0, 0, 6, 0, 0, 0, 4, 0, 0, 0 }; | |
199 | static unsigned char const GARMIN_SESSION_ACTIVE_REPLY[] | |
200 | = { 0, 0, 0, 0, 17, 0, 0, 0, 4, 0, 0, 0, 0, 16, 0, 0 }; | |
201 | static unsigned char const GARMIN_BULK_IN_AVAIL_REPLY[] | |
202 | = { 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0 }; | |
203 | static unsigned char const GARMIN_APP_LAYER_REPLY[] | |
204 | = { 0x14, 0, 0, 0 }; | |
205 | static unsigned char const GARMIN_START_PVT_REQ[] | |
206 | = { 20, 0, 0, 0, 10, 0, 0, 0, 2, 0, 0, 0, 49, 0 }; | |
207 | static unsigned char const GARMIN_STOP_PVT_REQ[] | |
208 | = { 20, 0, 0, 0, 10, 0, 0, 0, 2, 0, 0, 0, 50, 0 }; | |
209 | static unsigned char const GARMIN_STOP_TRANSFER_REQ[] | |
210 | = { 20, 0, 0, 0, 10, 0, 0, 0, 2, 0, 0, 0, 0, 0 }; | |
211 | static unsigned char const GARMIN_STOP_TRANSFER_REQ_V2[] | |
212 | = { 20, 0, 0, 0, 10, 0, 0, 0, 1, 0, 0, 0, 0 }; | |
213 | static unsigned char const PRIVATE_REQ[] | |
214 | = { 0x4B, 0x6E, 0x10, 0x01, 0xFF, 0, 0, 0, 0xFF, 0, 0, 0 }; | |
215 | ||
216 | ||
217 | ||
218 | static struct usb_device_id id_table [] = { | |
af6d780b AC |
219 | /* the same device id seems to be used by all |
220 | usb enabled GPS devices */ | |
221 | { USB_DEVICE(GARMIN_VENDOR_ID, 3) }, | |
1da177e4 LT |
222 | { } /* Terminating entry */ |
223 | }; | |
224 | ||
af6d780b | 225 | MODULE_DEVICE_TABLE(usb, id_table); |
1da177e4 LT |
226 | |
227 | static struct usb_driver garmin_driver = { | |
1da177e4 LT |
228 | .name = "garmin_gps", |
229 | .probe = usb_serial_probe, | |
230 | .disconnect = usb_serial_disconnect, | |
231 | .id_table = id_table, | |
eb6d8c2d | 232 | .no_dynamic_id = 1, |
1da177e4 LT |
233 | }; |
234 | ||
235 | ||
af6d780b | 236 | static inline int noResponseFromAppLayer(struct garmin_data *garmin_data_p) |
1da177e4 | 237 | { |
af6d780b AC |
238 | return atomic_read(&garmin_data_p->req_count) == |
239 | atomic_read(&garmin_data_p->resp_count); | |
1da177e4 LT |
240 | } |
241 | ||
242 | ||
243 | static inline int getLayerId(const __u8 *usbPacket) | |
244 | { | |
245 | return __le32_to_cpup((__le32 *)(usbPacket)); | |
246 | } | |
247 | ||
248 | static inline int getPacketId(const __u8 *usbPacket) | |
249 | { | |
250 | return __le32_to_cpup((__le32 *)(usbPacket+4)); | |
251 | } | |
252 | ||
253 | static inline int getDataLength(const __u8 *usbPacket) | |
254 | { | |
255 | return __le32_to_cpup((__le32 *)(usbPacket+8)); | |
256 | } | |
257 | ||
258 | ||
259 | /* | |
260 | * check if the usb-packet in buf contains an abort-transfer command. | |
261 | * (if yes, all queued data will be dropped) | |
262 | */ | |
263 | static inline int isAbortTrfCmnd(const unsigned char *buf) | |
264 | { | |
af6d780b AC |
265 | if (0 == memcmp(buf, GARMIN_STOP_TRANSFER_REQ, |
266 | sizeof(GARMIN_STOP_TRANSFER_REQ)) || | |
267 | 0 == memcmp(buf, GARMIN_STOP_TRANSFER_REQ_V2, | |
268 | sizeof(GARMIN_STOP_TRANSFER_REQ_V2))) | |
1da177e4 LT |
269 | return 1; |
270 | else | |
271 | return 0; | |
272 | } | |
273 | ||
274 | ||
275 | ||
276 | static void send_to_tty(struct usb_serial_port *port, | |
eb6d8c2d | 277 | char *data, unsigned int actual_length) |
1da177e4 | 278 | { |
4a90f09b | 279 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
1da177e4 LT |
280 | |
281 | if (tty && actual_length) { | |
282 | ||
af6d780b | 283 | usb_serial_debug_data(debug, &port->dev, |
441b62c1 | 284 | __func__, actual_length, data); |
1da177e4 | 285 | |
33f0f88f AC |
286 | tty_buffer_request_room(tty, actual_length); |
287 | tty_insert_flip_string(tty, data, actual_length); | |
1da177e4 LT |
288 | tty_flip_buffer_push(tty); |
289 | } | |
4a90f09b | 290 | tty_kref_put(tty); |
1da177e4 LT |
291 | } |
292 | ||
293 | ||
294 | /****************************************************************************** | |
295 | * packet queue handling | |
296 | ******************************************************************************/ | |
297 | ||
298 | /* | |
299 | * queue a received (usb-)packet for later processing | |
300 | */ | |
af6d780b | 301 | static int pkt_add(struct garmin_data *garmin_data_p, |
eb6d8c2d | 302 | unsigned char *data, unsigned int data_length) |
1da177e4 | 303 | { |
eb6d8c2d | 304 | int state = 0; |
1da177e4 LT |
305 | int result = 0; |
306 | unsigned long flags; | |
307 | struct garmin_packet *pkt; | |
308 | ||
309 | /* process only packets containg data ... */ | |
310 | if (data_length) { | |
1da177e4 | 311 | pkt = kmalloc(sizeof(struct garmin_packet)+data_length, |
af6d780b | 312 | GFP_ATOMIC); |
1da177e4 LT |
313 | if (pkt == NULL) { |
314 | dev_err(&garmin_data_p->port->dev, "out of memory\n"); | |
315 | return 0; | |
316 | } | |
317 | pkt->size = data_length; | |
318 | memcpy(pkt->data, data, data_length); | |
319 | ||
320 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
eb6d8c2d | 321 | garmin_data_p->flags |= FLAGS_QUEUING; |
1da177e4 LT |
322 | result = list_empty(&garmin_data_p->pktlist); |
323 | pkt->seq = garmin_data_p->seq_counter++; | |
324 | list_add_tail(&pkt->list, &garmin_data_p->pktlist); | |
eb6d8c2d | 325 | state = garmin_data_p->state; |
1da177e4 LT |
326 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
327 | ||
328 | /* in serial mode, if someone is waiting for data from | |
329 | the device, iconvert and send the next packet to tty. */ | |
af6d780b | 330 | if (result && (state == STATE_GSP_WAIT_DATA)) |
1da177e4 | 331 | gsp_next_packet(garmin_data_p); |
1da177e4 LT |
332 | } |
333 | return result; | |
334 | } | |
335 | ||
336 | ||
337 | /* get the next pending packet */ | |
af6d780b | 338 | static struct garmin_packet *pkt_pop(struct garmin_data *garmin_data_p) |
1da177e4 LT |
339 | { |
340 | unsigned long flags; | |
341 | struct garmin_packet *result = NULL; | |
342 | ||
343 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
344 | if (!list_empty(&garmin_data_p->pktlist)) { | |
345 | result = (struct garmin_packet *)garmin_data_p->pktlist.next; | |
346 | list_del(&result->list); | |
347 | } | |
348 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
349 | return result; | |
350 | } | |
351 | ||
352 | ||
353 | /* free up all queued data */ | |
af6d780b | 354 | static void pkt_clear(struct garmin_data *garmin_data_p) |
1da177e4 LT |
355 | { |
356 | unsigned long flags; | |
357 | struct garmin_packet *result = NULL; | |
358 | ||
441b62c1 | 359 | dbg("%s", __func__); |
1da177e4 LT |
360 | |
361 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
362 | while (!list_empty(&garmin_data_p->pktlist)) { | |
363 | result = (struct garmin_packet *)garmin_data_p->pktlist.next; | |
364 | list_del(&result->list); | |
365 | kfree(result); | |
366 | } | |
367 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
368 | } | |
369 | ||
370 | ||
371 | /****************************************************************************** | |
372 | * garmin serial protocol handling handling | |
373 | ******************************************************************************/ | |
374 | ||
375 | /* send an ack packet back to the tty */ | |
af6d780b | 376 | static int gsp_send_ack(struct garmin_data *garmin_data_p, __u8 pkt_id) |
1da177e4 LT |
377 | { |
378 | __u8 pkt[10]; | |
eb6d8c2d HK |
379 | __u8 cksum = 0; |
380 | __u8 *ptr = pkt; | |
381 | unsigned l = 0; | |
1da177e4 | 382 | |
441b62c1 | 383 | dbg("%s - pkt-id: 0x%X.", __func__, 0xFF & pkt_id); |
1da177e4 LT |
384 | |
385 | *ptr++ = DLE; | |
386 | *ptr++ = ACK; | |
387 | cksum += ACK; | |
388 | ||
389 | *ptr++ = 2; | |
390 | cksum += 2; | |
391 | ||
392 | *ptr++ = pkt_id; | |
393 | cksum += pkt_id; | |
394 | ||
af6d780b | 395 | if (pkt_id == DLE) |
1da177e4 | 396 | *ptr++ = DLE; |
1da177e4 LT |
397 | |
398 | *ptr++ = 0; | |
399 | *ptr++ = 0xFF & (-cksum); | |
400 | *ptr++ = DLE; | |
401 | *ptr++ = ETX; | |
402 | ||
403 | l = ptr-pkt; | |
404 | ||
405 | send_to_tty(garmin_data_p->port, pkt, l); | |
406 | return 0; | |
407 | } | |
408 | ||
409 | ||
410 | ||
411 | /* | |
412 | * called for a complete packet received from tty layer | |
413 | * | |
414 | * the complete packet (pkzid ... cksum) is in garmin_data_p->inbuf starting | |
415 | * at GSP_INITIAL_OFFSET. | |
416 | * | |
417 | * count - number of bytes in the input buffer including space reserved for | |
af6d780b | 418 | * the usb header: GSP_INITIAL_OFFSET + number of bytes in packet |
1da177e4 LT |
419 | * (including pkt-id, data-length a. cksum) |
420 | */ | |
af6d780b | 421 | static int gsp_rec_packet(struct garmin_data *garmin_data_p, int count) |
1da177e4 | 422 | { |
af6d780b | 423 | const __u8 *recpkt = garmin_data_p->inbuffer+GSP_INITIAL_OFFSET; |
eb6d8c2d | 424 | __le32 *usbdata = (__le32 *) garmin_data_p->inbuffer; |
1da177e4 LT |
425 | |
426 | int cksum = 0; | |
427 | int n = 0; | |
428 | int pktid = recpkt[0]; | |
429 | int size = recpkt[1]; | |
430 | ||
431 | usb_serial_debug_data(debug, &garmin_data_p->port->dev, | |
441b62c1 | 432 | __func__, count-GSP_INITIAL_OFFSET, recpkt); |
1da177e4 LT |
433 | |
434 | if (size != (count-GSP_INITIAL_OFFSET-3)) { | |
435 | dbg("%s - invalid size, expected %d bytes, got %d", | |
441b62c1 | 436 | __func__, size, (count-GSP_INITIAL_OFFSET-3)); |
1da177e4 LT |
437 | return -EINVPKT; |
438 | } | |
439 | ||
440 | cksum += *recpkt++; | |
441 | cksum += *recpkt++; | |
442 | ||
af6d780b AC |
443 | /* sanity check, remove after test ... */ |
444 | if ((__u8 *)&(usbdata[3]) != recpkt) { | |
1da177e4 | 445 | dbg("%s - ptr mismatch %p - %p", |
441b62c1 | 446 | __func__, &(usbdata[4]), recpkt); |
1da177e4 LT |
447 | return -EINVPKT; |
448 | } | |
449 | ||
450 | while (n < size) { | |
451 | cksum += *recpkt++; | |
452 | n++; | |
453 | } | |
454 | ||
eb6d8c2d HK |
455 | if ((0xff & (cksum + *recpkt)) != 0) { |
456 | dbg("%s - invalid checksum, expected %02x, got %02x", | |
441b62c1 | 457 | __func__, 0xff & -cksum, 0xff & *recpkt); |
eb6d8c2d HK |
458 | return -EINVPKT; |
459 | } | |
1da177e4 LT |
460 | |
461 | usbdata[0] = __cpu_to_le32(GARMIN_LAYERID_APPL); | |
462 | usbdata[1] = __cpu_to_le32(pktid); | |
463 | usbdata[2] = __cpu_to_le32(size); | |
464 | ||
af6d780b | 465 | garmin_write_bulk(garmin_data_p->port, garmin_data_p->inbuffer, |
468d1362 | 466 | GARMIN_PKTHDR_LENGTH+size, 0); |
1da177e4 LT |
467 | |
468 | /* if this was an abort-transfer command, flush all | |
469 | queued data. */ | |
470 | if (isAbortTrfCmnd(garmin_data_p->inbuffer)) { | |
471 | garmin_data_p->flags |= FLAGS_DROP_DATA; | |
472 | pkt_clear(garmin_data_p); | |
473 | } | |
474 | ||
475 | return count; | |
476 | } | |
477 | ||
478 | ||
479 | ||
480 | /* | |
481 | * Called for data received from tty | |
482 | * | |
483 | * buf contains the data read, it may span more than one packet or even | |
484 | * incomplete packets | |
485 | * | |
486 | * input record should be a serial-record, but it may not be complete. | |
487 | * Copy it into our local buffer, until an etx is seen (or an error | |
488 | * occurs). | |
489 | * Once the record is complete, convert into a usb packet and send it | |
490 | * to the bulk pipe, send an ack back to the tty. | |
491 | * | |
492 | * If the input is an ack, just send the last queued packet to the | |
493 | * tty layer. | |
494 | * | |
495 | * if the input is an abort command, drop all queued data. | |
496 | */ | |
497 | ||
af6d780b | 498 | static int gsp_receive(struct garmin_data *garmin_data_p, |
eb6d8c2d | 499 | const unsigned char *buf, int count) |
1da177e4 | 500 | { |
eb6d8c2d | 501 | unsigned long flags; |
1da177e4 LT |
502 | int offs = 0; |
503 | int ack_or_nak_seen = 0; | |
504 | int i = 0; | |
eb6d8c2d HK |
505 | __u8 *dest; |
506 | int size; | |
af6d780b | 507 | /* dleSeen: set if last byte read was a DLE */ |
eb6d8c2d | 508 | int dleSeen; |
af6d780b AC |
509 | /* skip: if set, skip incoming data until possible start of |
510 | * new packet | |
511 | */ | |
eb6d8c2d | 512 | int skip; |
1da177e4 LT |
513 | __u8 data; |
514 | ||
eb6d8c2d HK |
515 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
516 | dest = garmin_data_p->inbuffer; | |
517 | size = garmin_data_p->insize; | |
518 | dleSeen = garmin_data_p->flags & FLAGS_GSP_DLESEEN; | |
519 | skip = garmin_data_p->flags & FLAGS_GSP_SKIP; | |
520 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
521 | ||
1da177e4 | 522 | dbg("%s - dle=%d skip=%d size=%d count=%d", |
441b62c1 | 523 | __func__, dleSeen, skip, size, count); |
1da177e4 | 524 | |
af6d780b | 525 | if (size == 0) |
1da177e4 | 526 | size = GSP_INITIAL_OFFSET; |
1da177e4 LT |
527 | |
528 | while (offs < count) { | |
529 | ||
530 | data = *(buf+offs); | |
af6d780b | 531 | offs++; |
1da177e4 LT |
532 | |
533 | if (data == DLE) { | |
534 | if (skip) { /* start of a new pkt */ | |
535 | skip = 0; | |
536 | size = GSP_INITIAL_OFFSET; | |
537 | dleSeen = 1; | |
538 | } else if (dleSeen) { | |
539 | dest[size++] = data; | |
540 | dleSeen = 0; | |
541 | } else { | |
542 | dleSeen = 1; | |
543 | } | |
544 | } else if (data == ETX) { | |
545 | if (dleSeen) { | |
546 | /* packet complete */ | |
547 | ||
548 | data = dest[GSP_INITIAL_OFFSET]; | |
549 | ||
550 | if (data == ACK) { | |
551 | ack_or_nak_seen = ACK; | |
552 | dbg("ACK packet complete."); | |
553 | } else if (data == NAK) { | |
554 | ack_or_nak_seen = NAK; | |
555 | dbg("NAK packet complete."); | |
556 | } else { | |
af6d780b AC |
557 | dbg("packet complete - id=0x%X.", |
558 | 0xFF & data); | |
1da177e4 LT |
559 | gsp_rec_packet(garmin_data_p, size); |
560 | } | |
561 | ||
562 | skip = 1; | |
563 | size = GSP_INITIAL_OFFSET; | |
564 | dleSeen = 0; | |
565 | } else { | |
566 | dest[size++] = data; | |
567 | } | |
568 | } else if (!skip) { | |
569 | ||
570 | if (dleSeen) { | |
571 | dbg("non-masked DLE at %d - restarting", i); | |
572 | size = GSP_INITIAL_OFFSET; | |
573 | dleSeen = 0; | |
574 | } | |
575 | ||
576 | dest[size++] = data; | |
577 | } | |
578 | ||
579 | if (size >= GPS_IN_BUFSIZ) { | |
441b62c1 | 580 | dbg("%s - packet too large.", __func__); |
1da177e4 LT |
581 | skip = 1; |
582 | size = GSP_INITIAL_OFFSET; | |
583 | dleSeen = 0; | |
584 | } | |
585 | } | |
586 | ||
eb6d8c2d HK |
587 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
588 | ||
1da177e4 LT |
589 | garmin_data_p->insize = size; |
590 | ||
af6d780b | 591 | /* copy flags back to structure */ |
1da177e4 LT |
592 | if (skip) |
593 | garmin_data_p->flags |= FLAGS_GSP_SKIP; | |
594 | else | |
595 | garmin_data_p->flags &= ~FLAGS_GSP_SKIP; | |
596 | ||
597 | if (dleSeen) | |
598 | garmin_data_p->flags |= FLAGS_GSP_DLESEEN; | |
599 | else | |
600 | garmin_data_p->flags &= ~FLAGS_GSP_DLESEEN; | |
601 | ||
af6d780b | 602 | if (ack_or_nak_seen) |
1da177e4 | 603 | garmin_data_p->state = STATE_GSP_WAIT_DATA; |
eb6d8c2d HK |
604 | |
605 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
606 | ||
af6d780b | 607 | if (ack_or_nak_seen) |
1da177e4 | 608 | gsp_next_packet(garmin_data_p); |
1da177e4 LT |
609 | return count; |
610 | } | |
611 | ||
612 | ||
613 | ||
614 | ||
615 | /* | |
616 | * Sends a usb packet to the tty | |
617 | * | |
618 | * Assumes, that all packages and at an usb-packet boundary. | |
619 | * | |
620 | * return <0 on error, 0 if packet is incomplete or > 0 if packet was sent | |
621 | */ | |
af6d780b | 622 | static int gsp_send(struct garmin_data *garmin_data_p, |
1da177e4 LT |
623 | const unsigned char *buf, int count) |
624 | { | |
625 | const unsigned char *src; | |
626 | unsigned char *dst; | |
627 | int pktid = 0; | |
628 | int datalen = 0; | |
629 | int cksum = 0; | |
af6d780b | 630 | int i = 0; |
1da177e4 LT |
631 | int k; |
632 | ||
441b62c1 | 633 | dbg("%s - state %d - %d bytes.", __func__, |
af6d780b | 634 | garmin_data_p->state, count); |
1da177e4 LT |
635 | |
636 | k = garmin_data_p->outsize; | |
637 | if ((k+count) > GPS_OUT_BUFSIZ) { | |
638 | dbg("packet too large"); | |
639 | garmin_data_p->outsize = 0; | |
640 | return -4; | |
641 | } | |
642 | ||
643 | memcpy(garmin_data_p->outbuffer+k, buf, count); | |
644 | k += count; | |
645 | garmin_data_p->outsize = k; | |
646 | ||
647 | if (k >= GARMIN_PKTHDR_LENGTH) { | |
648 | pktid = getPacketId(garmin_data_p->outbuffer); | |
af6d780b | 649 | datalen = getDataLength(garmin_data_p->outbuffer); |
1da177e4 LT |
650 | i = GARMIN_PKTHDR_LENGTH + datalen; |
651 | if (k < i) | |
652 | return 0; | |
653 | } else { | |
654 | return 0; | |
655 | } | |
656 | ||
af6d780b | 657 | dbg("%s - %d bytes in buffer, %d bytes in pkt.", __func__, k, i); |
1da177e4 LT |
658 | |
659 | /* garmin_data_p->outbuffer now contains a complete packet */ | |
660 | ||
661 | usb_serial_debug_data(debug, &garmin_data_p->port->dev, | |
af6d780b | 662 | __func__, k, garmin_data_p->outbuffer); |
1da177e4 LT |
663 | |
664 | garmin_data_p->outsize = 0; | |
665 | ||
666 | if (GARMIN_LAYERID_APPL != getLayerId(garmin_data_p->outbuffer)) { | |
af6d780b AC |
667 | dbg("not an application packet (%d)", |
668 | getLayerId(garmin_data_p->outbuffer)); | |
1da177e4 LT |
669 | return -1; |
670 | } | |
671 | ||
672 | if (pktid > 255) { | |
673 | dbg("packet-id %d too large", pktid); | |
674 | return -2; | |
675 | } | |
676 | ||
677 | if (datalen > 255) { | |
678 | dbg("packet-size %d too large", datalen); | |
679 | return -3; | |
680 | } | |
681 | ||
682 | /* the serial protocol should be able to handle this packet */ | |
683 | ||
684 | k = 0; | |
685 | src = garmin_data_p->outbuffer+GARMIN_PKTHDR_LENGTH; | |
af6d780b | 686 | for (i = 0; i < datalen; i++) { |
1da177e4 LT |
687 | if (*src++ == DLE) |
688 | k++; | |
689 | } | |
690 | ||
691 | src = garmin_data_p->outbuffer+GARMIN_PKTHDR_LENGTH; | |
692 | if (k > (GARMIN_PKTHDR_LENGTH-2)) { | |
af6d780b | 693 | /* can't add stuffing DLEs in place, move data to end |
eb6d8c2d | 694 | of buffer ... */ |
1da177e4 LT |
695 | dst = garmin_data_p->outbuffer+GPS_OUT_BUFSIZ-datalen; |
696 | memcpy(dst, src, datalen); | |
697 | src = dst; | |
698 | } | |
699 | ||
700 | dst = garmin_data_p->outbuffer; | |
701 | ||
702 | *dst++ = DLE; | |
703 | *dst++ = pktid; | |
704 | cksum += pktid; | |
705 | *dst++ = datalen; | |
706 | cksum += datalen; | |
707 | if (datalen == DLE) | |
708 | *dst++ = DLE; | |
709 | ||
af6d780b | 710 | for (i = 0; i < datalen; i++) { |
1da177e4 LT |
711 | __u8 c = *src++; |
712 | *dst++ = c; | |
713 | cksum += c; | |
714 | if (c == DLE) | |
715 | *dst++ = DLE; | |
716 | } | |
af6d780b | 717 | |
1da177e4 LT |
718 | cksum = 0xFF & -cksum; |
719 | *dst++ = cksum; | |
720 | if (cksum == DLE) | |
721 | *dst++ = DLE; | |
722 | *dst++ = DLE; | |
723 | *dst++ = ETX; | |
724 | ||
725 | i = dst-garmin_data_p->outbuffer; | |
726 | ||
727 | send_to_tty(garmin_data_p->port, garmin_data_p->outbuffer, i); | |
728 | ||
729 | garmin_data_p->pkt_id = pktid; | |
730 | garmin_data_p->state = STATE_WAIT_TTY_ACK; | |
731 | ||
732 | return i; | |
733 | } | |
734 | ||
735 | ||
736 | ||
737 | ||
738 | ||
739 | /* | |
740 | * Process the next pending data packet - if there is one | |
741 | */ | |
af6d780b | 742 | static void gsp_next_packet(struct garmin_data *garmin_data_p) |
1da177e4 LT |
743 | { |
744 | struct garmin_packet *pkt = NULL; | |
745 | ||
746 | while ((pkt = pkt_pop(garmin_data_p)) != NULL) { | |
441b62c1 | 747 | dbg("%s - next pkt: %d", __func__, pkt->seq); |
1da177e4 LT |
748 | if (gsp_send(garmin_data_p, pkt->data, pkt->size) > 0) { |
749 | kfree(pkt); | |
750 | return; | |
751 | } | |
752 | kfree(pkt); | |
753 | } | |
754 | } | |
755 | ||
756 | ||
757 | ||
758 | ||
759 | /****************************************************************************** | |
760 | * garmin native mode | |
761 | ******************************************************************************/ | |
762 | ||
763 | ||
764 | /* | |
765 | * Called for data received from tty | |
766 | * | |
767 | * The input data is expected to be in garmin usb-packet format. | |
768 | * | |
769 | * buf contains the data read, it may span more than one packet | |
770 | * or even incomplete packets | |
771 | */ | |
af6d780b | 772 | static int nat_receive(struct garmin_data *garmin_data_p, |
eb6d8c2d | 773 | const unsigned char *buf, int count) |
1da177e4 | 774 | { |
eb6d8c2d | 775 | unsigned long flags; |
af6d780b | 776 | __u8 *dest; |
1da177e4 LT |
777 | int offs = 0; |
778 | int result = count; | |
779 | int len; | |
780 | ||
781 | while (offs < count) { | |
af6d780b | 782 | /* if buffer contains header, copy rest of data */ |
1da177e4 LT |
783 | if (garmin_data_p->insize >= GARMIN_PKTHDR_LENGTH) |
784 | len = GARMIN_PKTHDR_LENGTH | |
785 | +getDataLength(garmin_data_p->inbuffer); | |
786 | else | |
787 | len = GARMIN_PKTHDR_LENGTH; | |
788 | ||
789 | if (len >= GPS_IN_BUFSIZ) { | |
af6d780b AC |
790 | /* seems to be an invalid packet, ignore rest |
791 | of input */ | |
792 | dbg("%s - packet size too large: %d", __func__, len); | |
1da177e4 LT |
793 | garmin_data_p->insize = 0; |
794 | count = 0; | |
795 | result = -EINVPKT; | |
796 | } else { | |
797 | len -= garmin_data_p->insize; | |
798 | if (len > (count-offs)) | |
799 | len = (count-offs); | |
800 | if (len > 0) { | |
801 | dest = garmin_data_p->inbuffer | |
af6d780b | 802 | + garmin_data_p->insize; |
1da177e4 LT |
803 | memcpy(dest, buf+offs, len); |
804 | garmin_data_p->insize += len; | |
805 | offs += len; | |
806 | } | |
807 | } | |
808 | ||
809 | /* do we have a complete packet ? */ | |
810 | if (garmin_data_p->insize >= GARMIN_PKTHDR_LENGTH) { | |
811 | len = GARMIN_PKTHDR_LENGTH+ | |
812 | getDataLength(garmin_data_p->inbuffer); | |
813 | if (garmin_data_p->insize >= len) { | |
af6d780b AC |
814 | garmin_write_bulk(garmin_data_p->port, |
815 | garmin_data_p->inbuffer, | |
816 | len, 0); | |
1da177e4 LT |
817 | garmin_data_p->insize = 0; |
818 | ||
819 | /* if this was an abort-transfer command, | |
820 | flush all queued data. */ | |
821 | if (isAbortTrfCmnd(garmin_data_p->inbuffer)) { | |
af6d780b AC |
822 | spin_lock_irqsave(&garmin_data_p->lock, |
823 | flags); | |
1da177e4 | 824 | garmin_data_p->flags |= FLAGS_DROP_DATA; |
af6d780b AC |
825 | spin_unlock_irqrestore( |
826 | &garmin_data_p->lock, flags); | |
1da177e4 LT |
827 | pkt_clear(garmin_data_p); |
828 | } | |
829 | } | |
830 | } | |
831 | } | |
832 | return result; | |
833 | } | |
834 | ||
835 | ||
836 | /****************************************************************************** | |
837 | * private packets | |
838 | ******************************************************************************/ | |
839 | ||
840 | static void priv_status_resp(struct usb_serial_port *port) | |
841 | { | |
af6d780b | 842 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 LT |
843 | __le32 *pkt = (__le32 *)garmin_data_p->privpkt; |
844 | ||
845 | pkt[0] = __cpu_to_le32(GARMIN_LAYERID_PRIVATE); | |
846 | pkt[1] = __cpu_to_le32(PRIV_PKTID_INFO_RESP); | |
847 | pkt[2] = __cpu_to_le32(12); | |
848 | pkt[3] = __cpu_to_le32(VERSION_MAJOR << 16 | VERSION_MINOR); | |
849 | pkt[4] = __cpu_to_le32(garmin_data_p->mode); | |
850 | pkt[5] = __cpu_to_le32(garmin_data_p->serial_num); | |
851 | ||
af6d780b | 852 | send_to_tty(port, (__u8 *)pkt, 6 * 4); |
1da177e4 LT |
853 | } |
854 | ||
855 | ||
856 | /****************************************************************************** | |
857 | * Garmin specific driver functions | |
858 | ******************************************************************************/ | |
859 | ||
860 | static int process_resetdev_request(struct usb_serial_port *port) | |
861 | { | |
eb6d8c2d | 862 | unsigned long flags; |
1da177e4 | 863 | int status; |
af6d780b | 864 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 865 | |
eb6d8c2d | 866 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 LT |
867 | garmin_data_p->flags &= ~(CLEAR_HALT_REQUIRED); |
868 | garmin_data_p->state = STATE_RESET; | |
869 | garmin_data_p->serial_num = 0; | |
eb6d8c2d | 870 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 | 871 | |
af6d780b AC |
872 | usb_kill_urb(port->interrupt_in_urb); |
873 | dbg("%s - usb_reset_device", __func__); | |
1da177e4 LT |
874 | status = usb_reset_device(port->serial->dev); |
875 | if (status) | |
876 | dbg("%s - usb_reset_device failed: %d", | |
441b62c1 | 877 | __func__, status); |
1da177e4 LT |
878 | return status; |
879 | } | |
880 | ||
881 | ||
882 | ||
883 | /* | |
884 | * clear all cached data | |
885 | */ | |
af6d780b | 886 | static int garmin_clear(struct garmin_data *garmin_data_p) |
1da177e4 | 887 | { |
eb6d8c2d | 888 | unsigned long flags; |
1da177e4 LT |
889 | int status = 0; |
890 | ||
891 | struct usb_serial_port *port = garmin_data_p->port; | |
892 | ||
468d1362 | 893 | if (port != NULL && atomic_read(&garmin_data_p->resp_count)) { |
1da177e4 LT |
894 | /* send a terminate command */ |
895 | status = garmin_write_bulk(port, GARMIN_STOP_TRANSFER_REQ, | |
af6d780b | 896 | sizeof(GARMIN_STOP_TRANSFER_REQ), 1); |
1da177e4 LT |
897 | } |
898 | ||
899 | /* flush all queued data */ | |
900 | pkt_clear(garmin_data_p); | |
901 | ||
eb6d8c2d | 902 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 LT |
903 | garmin_data_p->insize = 0; |
904 | garmin_data_p->outsize = 0; | |
eb6d8c2d | 905 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 LT |
906 | |
907 | return status; | |
908 | } | |
909 | ||
910 | ||
911 | ||
912 | ||
913 | ||
914 | ||
915 | static int garmin_init_session(struct usb_serial_port *port) | |
916 | { | |
eb6d8c2d | 917 | unsigned long flags; |
1da177e4 | 918 | struct usb_serial *serial = port->serial; |
af6d780b | 919 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 LT |
920 | int status = 0; |
921 | ||
922 | if (status == 0) { | |
af6d780b | 923 | usb_kill_urb(port->interrupt_in_urb); |
1da177e4 | 924 | |
441b62c1 | 925 | dbg("%s - adding interrupt input", __func__); |
1da177e4 LT |
926 | port->interrupt_in_urb->dev = serial->dev; |
927 | status = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); | |
928 | if (status) | |
929 | dev_err(&serial->dev->dev, | |
af6d780b AC |
930 | "%s - failed submitting interrupt urb, error %d\n", |
931 | __func__, status); | |
1da177e4 LT |
932 | } |
933 | ||
934 | if (status == 0) { | |
441b62c1 | 935 | dbg("%s - starting session ...", __func__); |
1da177e4 LT |
936 | garmin_data_p->state = STATE_ACTIVE; |
937 | status = garmin_write_bulk(port, GARMIN_START_SESSION_REQ, | |
af6d780b | 938 | sizeof(GARMIN_START_SESSION_REQ), 0); |
1da177e4 LT |
939 | |
940 | if (status >= 0) { | |
941 | ||
eb6d8c2d | 942 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 | 943 | garmin_data_p->ignorePkts++; |
eb6d8c2d | 944 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 LT |
945 | |
946 | /* not needed, but the win32 driver does it too ... */ | |
947 | status = garmin_write_bulk(port, | |
af6d780b AC |
948 | GARMIN_START_SESSION_REQ2, |
949 | sizeof(GARMIN_START_SESSION_REQ2), 0); | |
1da177e4 LT |
950 | if (status >= 0) { |
951 | status = 0; | |
eb6d8c2d | 952 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 | 953 | garmin_data_p->ignorePkts++; |
af6d780b AC |
954 | spin_unlock_irqrestore(&garmin_data_p->lock, |
955 | flags); | |
1da177e4 LT |
956 | } |
957 | } | |
958 | } | |
959 | ||
960 | return status; | |
961 | } | |
962 | ||
963 | ||
964 | ||
965 | ||
966 | ||
af6d780b | 967 | static int garmin_open(struct tty_struct *tty, |
95da310e | 968 | struct usb_serial_port *port, struct file *filp) |
1da177e4 | 969 | { |
eb6d8c2d | 970 | unsigned long flags; |
1da177e4 | 971 | int status = 0; |
af6d780b | 972 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 973 | |
441b62c1 | 974 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 975 | |
eb6d8c2d | 976 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 LT |
977 | garmin_data_p->mode = initial_mode; |
978 | garmin_data_p->count = 0; | |
979 | garmin_data_p->flags = 0; | |
468d1362 HK |
980 | atomic_set(&garmin_data_p->req_count, 0); |
981 | atomic_set(&garmin_data_p->resp_count, 0); | |
eb6d8c2d | 982 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 LT |
983 | |
984 | /* shutdown any bulk reads that might be going on */ | |
af6d780b AC |
985 | usb_kill_urb(port->write_urb); |
986 | usb_kill_urb(port->read_urb); | |
1da177e4 | 987 | |
95da310e | 988 | if (garmin_data_p->state == STATE_RESET) |
1da177e4 | 989 | status = garmin_init_session(port); |
1da177e4 LT |
990 | |
991 | garmin_data_p->state = STATE_ACTIVE; | |
1da177e4 LT |
992 | return status; |
993 | } | |
994 | ||
995 | ||
95da310e | 996 | static void garmin_close(struct tty_struct *tty, |
af6d780b | 997 | struct usb_serial_port *port, struct file *filp) |
1da177e4 LT |
998 | { |
999 | struct usb_serial *serial = port->serial; | |
af6d780b | 1000 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 1001 | |
441b62c1 | 1002 | dbg("%s - port %d - mode=%d state=%d flags=0x%X", __func__, |
1da177e4 LT |
1003 | port->number, garmin_data_p->mode, |
1004 | garmin_data_p->state, garmin_data_p->flags); | |
1005 | ||
1006 | if (!serial) | |
1007 | return; | |
1008 | ||
95bef012 ON |
1009 | mutex_lock(&port->serial->disc_mutex); |
1010 | if (!port->serial->disconnected) | |
1011 | garmin_clear(garmin_data_p); | |
1da177e4 LT |
1012 | |
1013 | /* shutdown our urbs */ | |
af6d780b AC |
1014 | usb_kill_urb(port->read_urb); |
1015 | usb_kill_urb(port->write_urb); | |
1da177e4 | 1016 | |
95bef012 ON |
1017 | if (!port->serial->disconnected) { |
1018 | if (noResponseFromAppLayer(garmin_data_p) || | |
1019 | ((garmin_data_p->flags & CLEAR_HALT_REQUIRED) != 0)) { | |
1020 | process_resetdev_request(port); | |
1021 | garmin_data_p->state = STATE_RESET; | |
1022 | } else { | |
1023 | garmin_data_p->state = STATE_DISCONNECTED; | |
1024 | } | |
1da177e4 LT |
1025 | } else { |
1026 | garmin_data_p->state = STATE_DISCONNECTED; | |
1027 | } | |
95bef012 | 1028 | mutex_unlock(&port->serial->disc_mutex); |
1da177e4 LT |
1029 | } |
1030 | ||
af6d780b | 1031 | static void garmin_write_bulk_callback(struct urb *urb) |
1da177e4 | 1032 | { |
eb6d8c2d | 1033 | unsigned long flags; |
cdc97792 | 1034 | struct usb_serial_port *port = urb->context; |
f9feb517 | 1035 | int status = urb->status; |
1da177e4 | 1036 | |
468d1362 | 1037 | if (port) { |
af6d780b AC |
1038 | struct garmin_data *garmin_data_p = |
1039 | usb_get_serial_port_data(port); | |
1da177e4 | 1040 | |
441b62c1 | 1041 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1042 | |
468d1362 HK |
1043 | if (GARMIN_LAYERID_APPL == getLayerId(urb->transfer_buffer) |
1044 | && (garmin_data_p->mode == MODE_GARMIN_SERIAL)) { | |
af6d780b AC |
1045 | gsp_send_ack(garmin_data_p, |
1046 | ((__u8 *)urb->transfer_buffer)[4]); | |
468d1362 HK |
1047 | } |
1048 | ||
1049 | if (status) { | |
1050 | dbg("%s - nonzero write bulk status received: %d", | |
50de36f7 | 1051 | __func__, status); |
468d1362 HK |
1052 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1053 | garmin_data_p->flags |= CLEAR_HALT_REQUIRED; | |
1054 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
1055 | } | |
1056 | ||
1057 | usb_serial_port_softint(port); | |
1da177e4 LT |
1058 | } |
1059 | ||
af6d780b AC |
1060 | /* Ignore errors that resulted from garmin_write_bulk with |
1061 | dismiss_ack = 1 */ | |
468d1362 HK |
1062 | |
1063 | /* free up the transfer buffer, as usb_free_urb() does not do this */ | |
af6d780b | 1064 | kfree(urb->transfer_buffer); |
1da177e4 LT |
1065 | } |
1066 | ||
1067 | ||
af6d780b | 1068 | static int garmin_write_bulk(struct usb_serial_port *port, |
468d1362 HK |
1069 | const unsigned char *buf, int count, |
1070 | int dismiss_ack) | |
1da177e4 | 1071 | { |
eb6d8c2d | 1072 | unsigned long flags; |
1da177e4 | 1073 | struct usb_serial *serial = port->serial; |
af6d780b | 1074 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 LT |
1075 | struct urb *urb; |
1076 | unsigned char *buffer; | |
1077 | int status; | |
1078 | ||
441b62c1 | 1079 | dbg("%s - port %d, state %d", __func__, port->number, |
1da177e4 LT |
1080 | garmin_data_p->state); |
1081 | ||
eb6d8c2d | 1082 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 | 1083 | garmin_data_p->flags &= ~FLAGS_DROP_DATA; |
eb6d8c2d | 1084 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 | 1085 | |
af6d780b | 1086 | buffer = kmalloc(count, GFP_ATOMIC); |
1da177e4 LT |
1087 | if (!buffer) { |
1088 | dev_err(&port->dev, "out of memory\n"); | |
1089 | return -ENOMEM; | |
1090 | } | |
1091 | ||
1092 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
1093 | if (!urb) { | |
1094 | dev_err(&port->dev, "no more free urbs\n"); | |
af6d780b | 1095 | kfree(buffer); |
1da177e4 LT |
1096 | return -ENOMEM; |
1097 | } | |
1098 | ||
af6d780b | 1099 | memcpy(buffer, buf, count); |
1da177e4 | 1100 | |
441b62c1 | 1101 | usb_serial_debug_data(debug, &port->dev, __func__, count, buffer); |
1da177e4 | 1102 | |
af6d780b AC |
1103 | usb_fill_bulk_urb(urb, serial->dev, |
1104 | usb_sndbulkpipe(serial->dev, | |
1105 | port->bulk_out_endpointAddress), | |
1da177e4 | 1106 | buffer, count, |
468d1362 HK |
1107 | garmin_write_bulk_callback, |
1108 | dismiss_ack ? NULL : port); | |
1da177e4 LT |
1109 | urb->transfer_flags |= URB_ZERO_PACKET; |
1110 | ||
1111 | if (GARMIN_LAYERID_APPL == getLayerId(buffer)) { | |
468d1362 | 1112 | atomic_inc(&garmin_data_p->req_count); |
1da177e4 LT |
1113 | if (garmin_data_p->mode == MODE_GARMIN_SERIAL) { |
1114 | pkt_clear(garmin_data_p); | |
1115 | garmin_data_p->state = STATE_GSP_WAIT_DATA; | |
1116 | } | |
1117 | } | |
1118 | ||
1119 | /* send it down the pipe */ | |
1120 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
1121 | if (status) { | |
1122 | dev_err(&port->dev, | |
af6d780b | 1123 | "%s - usb_submit_urb(write bulk) failed with status = %d\n", |
441b62c1 | 1124 | __func__, status); |
1da177e4 | 1125 | count = status; |
1da177e4 LT |
1126 | } |
1127 | ||
1128 | /* we are done with this urb, so let the host driver | |
1129 | * really free it when it is finished with it */ | |
af6d780b | 1130 | usb_free_urb(urb); |
1da177e4 LT |
1131 | |
1132 | return count; | |
1133 | } | |
1134 | ||
af6d780b | 1135 | static int garmin_write(struct tty_struct *tty, struct usb_serial_port *port, |
95da310e | 1136 | const unsigned char *buf, int count) |
1da177e4 LT |
1137 | { |
1138 | int pktid, pktsiz, len; | |
af6d780b | 1139 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 LT |
1140 | __le32 *privpkt = (__le32 *)garmin_data_p->privpkt; |
1141 | ||
441b62c1 | 1142 | usb_serial_debug_data(debug, &port->dev, __func__, count, buf); |
1da177e4 LT |
1143 | |
1144 | /* check for our private packets */ | |
1145 | if (count >= GARMIN_PKTHDR_LENGTH) { | |
1da177e4 LT |
1146 | len = PRIVPKTSIZ; |
1147 | if (count < len) | |
1148 | len = count; | |
1149 | ||
1150 | memcpy(garmin_data_p->privpkt, buf, len); | |
1151 | ||
1152 | pktsiz = getDataLength(garmin_data_p->privpkt); | |
1153 | pktid = getPacketId(garmin_data_p->privpkt); | |
1154 | ||
1155 | if (count == (GARMIN_PKTHDR_LENGTH+pktsiz) | |
af6d780b AC |
1156 | && GARMIN_LAYERID_PRIVATE == |
1157 | getLayerId(garmin_data_p->privpkt)) { | |
1da177e4 LT |
1158 | |
1159 | dbg("%s - processing private request %d", | |
441b62c1 | 1160 | __func__, pktid); |
1da177e4 | 1161 | |
af6d780b | 1162 | /* drop all unfinished transfers */ |
1da177e4 LT |
1163 | garmin_clear(garmin_data_p); |
1164 | ||
af6d780b | 1165 | switch (pktid) { |
1da177e4 LT |
1166 | |
1167 | case PRIV_PKTID_SET_DEBUG: | |
1168 | if (pktsiz != 4) | |
1169 | return -EINVPKT; | |
1170 | debug = __le32_to_cpu(privpkt[3]); | |
1171 | dbg("%s - debug level set to 0x%X", | |
441b62c1 | 1172 | __func__, debug); |
1da177e4 LT |
1173 | break; |
1174 | ||
1175 | case PRIV_PKTID_SET_MODE: | |
1176 | if (pktsiz != 4) | |
1177 | return -EINVPKT; | |
1178 | garmin_data_p->mode = __le32_to_cpu(privpkt[3]); | |
1179 | dbg("%s - mode set to %d", | |
441b62c1 | 1180 | __func__, garmin_data_p->mode); |
1da177e4 LT |
1181 | break; |
1182 | ||
1183 | case PRIV_PKTID_INFO_REQ: | |
1184 | priv_status_resp(port); | |
1185 | break; | |
1186 | ||
1187 | case PRIV_PKTID_RESET_REQ: | |
468d1362 | 1188 | atomic_inc(&garmin_data_p->req_count); |
1da177e4 LT |
1189 | break; |
1190 | ||
1191 | case PRIV_PKTID_SET_DEF_MODE: | |
1192 | if (pktsiz != 4) | |
1193 | return -EINVPKT; | |
1194 | initial_mode = __le32_to_cpu(privpkt[3]); | |
1195 | dbg("%s - initial_mode set to %d", | |
441b62c1 | 1196 | __func__, |
1da177e4 LT |
1197 | garmin_data_p->mode); |
1198 | break; | |
1199 | } | |
1200 | return count; | |
1201 | } | |
1202 | } | |
1203 | ||
eb6d8c2d HK |
1204 | garmin_data_p->ignorePkts = 0; |
1205 | ||
1da177e4 LT |
1206 | if (garmin_data_p->mode == MODE_GARMIN_SERIAL) { |
1207 | return gsp_receive(garmin_data_p, buf, count); | |
1208 | } else { /* MODE_NATIVE */ | |
1209 | return nat_receive(garmin_data_p, buf, count); | |
1210 | } | |
1211 | } | |
1212 | ||
1213 | ||
95da310e | 1214 | static int garmin_write_room(struct tty_struct *tty) |
1da177e4 | 1215 | { |
95da310e | 1216 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1217 | /* |
1218 | * Report back the bytes currently available in the output buffer. | |
1219 | */ | |
af6d780b | 1220 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 LT |
1221 | return GPS_OUT_BUFSIZ-garmin_data_p->outsize; |
1222 | } | |
1223 | ||
1224 | ||
af6d780b | 1225 | static void garmin_read_process(struct garmin_data *garmin_data_p, |
1da177e4 LT |
1226 | unsigned char *data, unsigned data_length) |
1227 | { | |
1228 | if (garmin_data_p->flags & FLAGS_DROP_DATA) { | |
1229 | /* abort-transfer cmd is actice */ | |
441b62c1 | 1230 | dbg("%s - pkt dropped", __func__); |
1da177e4 | 1231 | } else if (garmin_data_p->state != STATE_DISCONNECTED && |
af6d780b | 1232 | garmin_data_p->state != STATE_RESET) { |
1da177e4 LT |
1233 | |
1234 | /* remember any appl.layer packets, so we know | |
1235 | if a reset is required or not when closing | |
1236 | the device */ | |
1237 | if (0 == memcmp(data, GARMIN_APP_LAYER_REPLY, | |
af6d780b | 1238 | sizeof(GARMIN_APP_LAYER_REPLY))) { |
468d1362 | 1239 | atomic_inc(&garmin_data_p->resp_count); |
eb6d8c2d | 1240 | } |
1da177e4 LT |
1241 | |
1242 | /* if throttling is active or postprecessing is required | |
eb6d8c2d | 1243 | put the received data in the input queue, otherwise |
1da177e4 LT |
1244 | send it directly to the tty port */ |
1245 | if (garmin_data_p->flags & FLAGS_QUEUING) { | |
1246 | pkt_add(garmin_data_p, data, data_length); | |
1247 | } else if (garmin_data_p->mode == MODE_GARMIN_SERIAL) { | |
af6d780b | 1248 | if (getLayerId(data) == GARMIN_LAYERID_APPL) |
1da177e4 | 1249 | pkt_add(garmin_data_p, data, data_length); |
1da177e4 LT |
1250 | } else { |
1251 | send_to_tty(garmin_data_p->port, data, data_length); | |
1252 | } | |
1253 | } | |
1254 | } | |
1255 | ||
1256 | ||
af6d780b | 1257 | static void garmin_read_bulk_callback(struct urb *urb) |
1da177e4 | 1258 | { |
eb6d8c2d | 1259 | unsigned long flags; |
cdc97792 | 1260 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1261 | struct usb_serial *serial = port->serial; |
af6d780b | 1262 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 1263 | unsigned char *data = urb->transfer_buffer; |
f9feb517 GKH |
1264 | int status = urb->status; |
1265 | int retval; | |
1da177e4 | 1266 | |
441b62c1 | 1267 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
1268 | |
1269 | if (!serial) { | |
441b62c1 | 1270 | dbg("%s - bad serial pointer, exiting", __func__); |
1da177e4 LT |
1271 | return; |
1272 | } | |
1273 | ||
f9feb517 | 1274 | if (status) { |
1da177e4 | 1275 | dbg("%s - nonzero read bulk status received: %d", |
441b62c1 | 1276 | __func__, status); |
1da177e4 LT |
1277 | return; |
1278 | } | |
1279 | ||
af6d780b | 1280 | usb_serial_debug_data(debug, &port->dev, |
441b62c1 | 1281 | __func__, urb->actual_length, data); |
1da177e4 LT |
1282 | |
1283 | garmin_read_process(garmin_data_p, data, urb->actual_length); | |
1284 | ||
eb6d8c2d HK |
1285 | if (urb->actual_length == 0 && |
1286 | 0 != (garmin_data_p->flags & FLAGS_BULK_IN_RESTART)) { | |
1287 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
1288 | garmin_data_p->flags &= ~FLAGS_BULK_IN_RESTART; | |
1289 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
f9feb517 GKH |
1290 | retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1291 | if (retval) | |
1da177e4 LT |
1292 | dev_err(&port->dev, |
1293 | "%s - failed resubmitting read urb, error %d\n", | |
441b62c1 | 1294 | __func__, retval); |
eb6d8c2d HK |
1295 | } else if (urb->actual_length > 0) { |
1296 | /* Continue trying to read until nothing more is received */ | |
1297 | if (0 == (garmin_data_p->flags & FLAGS_THROTTLED)) { | |
f9feb517 GKH |
1298 | retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1299 | if (retval) | |
eb6d8c2d | 1300 | dev_err(&port->dev, |
f9feb517 | 1301 | "%s - failed resubmitting read urb, " |
441b62c1 | 1302 | "error %d\n", __func__, retval); |
eb6d8c2d HK |
1303 | } |
1304 | } else { | |
441b62c1 | 1305 | dbg("%s - end of bulk data", __func__); |
eb6d8c2d HK |
1306 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1307 | garmin_data_p->flags &= ~FLAGS_BULK_IN_ACTIVE; | |
1308 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
1da177e4 LT |
1309 | } |
1310 | return; | |
1311 | } | |
1312 | ||
1313 | ||
af6d780b | 1314 | static void garmin_read_int_callback(struct urb *urb) |
1da177e4 | 1315 | { |
eb6d8c2d | 1316 | unsigned long flags; |
f9feb517 | 1317 | int retval; |
cdc97792 | 1318 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1319 | struct usb_serial *serial = port->serial; |
af6d780b | 1320 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 1321 | unsigned char *data = urb->transfer_buffer; |
f9feb517 | 1322 | int status = urb->status; |
1da177e4 | 1323 | |
f9feb517 | 1324 | switch (status) { |
1da177e4 LT |
1325 | case 0: |
1326 | /* success */ | |
1327 | break; | |
1328 | case -ECONNRESET: | |
1329 | case -ENOENT: | |
1330 | case -ESHUTDOWN: | |
1331 | /* this urb is terminated, clean up */ | |
1332 | dbg("%s - urb shutting down with status: %d", | |
441b62c1 | 1333 | __func__, status); |
1da177e4 LT |
1334 | return; |
1335 | default: | |
1336 | dbg("%s - nonzero urb status received: %d", | |
441b62c1 | 1337 | __func__, status); |
1da177e4 LT |
1338 | return; |
1339 | } | |
1340 | ||
441b62c1 | 1341 | usb_serial_debug_data(debug, &port->dev, __func__, |
1da177e4 LT |
1342 | urb->actual_length, urb->transfer_buffer); |
1343 | ||
1344 | if (urb->actual_length == sizeof(GARMIN_BULK_IN_AVAIL_REPLY) && | |
1345 | 0 == memcmp(data, GARMIN_BULK_IN_AVAIL_REPLY, | |
af6d780b | 1346 | sizeof(GARMIN_BULK_IN_AVAIL_REPLY))) { |
1da177e4 | 1347 | |
441b62c1 | 1348 | dbg("%s - bulk data available.", __func__); |
1da177e4 | 1349 | |
eb6d8c2d HK |
1350 | if (0 == (garmin_data_p->flags & FLAGS_BULK_IN_ACTIVE)) { |
1351 | ||
1352 | /* bulk data available */ | |
af6d780b AC |
1353 | usb_fill_bulk_urb(port->read_urb, serial->dev, |
1354 | usb_rcvbulkpipe(serial->dev, | |
1355 | port->bulk_in_endpointAddress), | |
eb6d8c2d HK |
1356 | port->read_urb->transfer_buffer, |
1357 | port->read_urb->transfer_buffer_length, | |
1358 | garmin_read_bulk_callback, port); | |
f9feb517 GKH |
1359 | retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1360 | if (retval) { | |
eb6d8c2d | 1361 | dev_err(&port->dev, |
af6d780b AC |
1362 | "%s - failed submitting read urb, error %d\n", |
1363 | __func__, retval); | |
eb6d8c2d HK |
1364 | } else { |
1365 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
1366 | garmin_data_p->flags |= FLAGS_BULK_IN_ACTIVE; | |
1367 | /* do not send this packet to the user */ | |
1368 | garmin_data_p->ignorePkts = 1; | |
af6d780b AC |
1369 | spin_unlock_irqrestore(&garmin_data_p->lock, |
1370 | flags); | |
eb6d8c2d HK |
1371 | } |
1372 | } else { | |
1373 | /* bulk-in transfer still active */ | |
1374 | spin_lock_irqsave(&garmin_data_p->lock, flags); | |
1375 | garmin_data_p->flags |= FLAGS_BULK_IN_RESTART; | |
1376 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); | |
1da177e4 LT |
1377 | } |
1378 | ||
1379 | } else if (urb->actual_length == (4+sizeof(GARMIN_START_SESSION_REPLY)) | |
1380 | && 0 == memcmp(data, GARMIN_START_SESSION_REPLY, | |
af6d780b | 1381 | sizeof(GARMIN_START_SESSION_REPLY))) { |
1da177e4 | 1382 | |
eb6d8c2d | 1383 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 | 1384 | garmin_data_p->flags |= FLAGS_SESSION_REPLY1_SEEN; |
eb6d8c2d | 1385 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 LT |
1386 | |
1387 | /* save the serial number */ | |
af6d780b AC |
1388 | garmin_data_p->serial_num = __le32_to_cpup( |
1389 | (__le32 *)(data+GARMIN_PKTHDR_LENGTH)); | |
1da177e4 LT |
1390 | |
1391 | dbg("%s - start-of-session reply seen - serial %u.", | |
441b62c1 | 1392 | __func__, garmin_data_p->serial_num); |
1da177e4 LT |
1393 | } |
1394 | ||
1395 | if (garmin_data_p->ignorePkts) { | |
1396 | /* this reply belongs to a request generated by the driver, | |
1397 | ignore it. */ | |
1398 | dbg("%s - pkt ignored (%d)", | |
441b62c1 | 1399 | __func__, garmin_data_p->ignorePkts); |
eb6d8c2d | 1400 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 | 1401 | garmin_data_p->ignorePkts--; |
eb6d8c2d | 1402 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 LT |
1403 | } else { |
1404 | garmin_read_process(garmin_data_p, data, urb->actual_length); | |
1405 | } | |
1406 | ||
1407 | port->interrupt_in_urb->dev = port->serial->dev; | |
af6d780b | 1408 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
f9feb517 | 1409 | if (retval) |
1da177e4 LT |
1410 | dev_err(&urb->dev->dev, |
1411 | "%s - Error %d submitting interrupt urb\n", | |
441b62c1 | 1412 | __func__, retval); |
1da177e4 LT |
1413 | } |
1414 | ||
1415 | ||
1416 | /* | |
1417 | * Sends the next queued packt to the tty port (garmin native mode only) | |
1418 | * and then sets a timer to call itself again until all queued data | |
1419 | * is sent. | |
1420 | */ | |
af6d780b | 1421 | static int garmin_flush_queue(struct garmin_data *garmin_data_p) |
1da177e4 | 1422 | { |
eb6d8c2d | 1423 | unsigned long flags; |
1da177e4 LT |
1424 | struct garmin_packet *pkt; |
1425 | ||
1426 | if ((garmin_data_p->flags & FLAGS_THROTTLED) == 0) { | |
1427 | pkt = pkt_pop(garmin_data_p); | |
1428 | if (pkt != NULL) { | |
1da177e4 LT |
1429 | send_to_tty(garmin_data_p->port, pkt->data, pkt->size); |
1430 | kfree(pkt); | |
1431 | mod_timer(&garmin_data_p->timer, (1)+jiffies); | |
1432 | ||
1433 | } else { | |
eb6d8c2d | 1434 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 | 1435 | garmin_data_p->flags &= ~FLAGS_QUEUING; |
eb6d8c2d | 1436 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 LT |
1437 | } |
1438 | } | |
1439 | return 0; | |
1440 | } | |
1441 | ||
1442 | ||
95da310e | 1443 | static void garmin_throttle(struct tty_struct *tty) |
1da177e4 | 1444 | { |
95da310e | 1445 | struct usb_serial_port *port = tty->driver_data; |
af6d780b | 1446 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
95da310e | 1447 | unsigned long flags; |
1da177e4 | 1448 | |
441b62c1 | 1449 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
1450 | /* set flag, data received will be put into a queue |
1451 | for later processing */ | |
eb6d8c2d | 1452 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 | 1453 | garmin_data_p->flags |= FLAGS_QUEUING|FLAGS_THROTTLED; |
eb6d8c2d | 1454 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 LT |
1455 | } |
1456 | ||
1457 | ||
af6d780b | 1458 | static void garmin_unthrottle(struct tty_struct *tty) |
1da177e4 | 1459 | { |
95da310e | 1460 | struct usb_serial_port *port = tty->driver_data; |
af6d780b | 1461 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
95da310e | 1462 | unsigned long flags; |
eb6d8c2d | 1463 | int status; |
1da177e4 | 1464 | |
441b62c1 | 1465 | dbg("%s - port %d", __func__, port->number); |
eb6d8c2d | 1466 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
1da177e4 | 1467 | garmin_data_p->flags &= ~FLAGS_THROTTLED; |
eb6d8c2d | 1468 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
1da177e4 LT |
1469 | |
1470 | /* in native mode send queued data to tty, in | |
1471 | serial mode nothing needs to be done here */ | |
1472 | if (garmin_data_p->mode == MODE_NATIVE) | |
1473 | garmin_flush_queue(garmin_data_p); | |
eb6d8c2d HK |
1474 | |
1475 | if (0 != (garmin_data_p->flags & FLAGS_BULK_IN_ACTIVE)) { | |
1476 | status = usb_submit_urb(port->read_urb, GFP_ATOMIC); | |
1477 | if (status) | |
1478 | dev_err(&port->dev, | |
1479 | "%s - failed resubmitting read urb, error %d\n", | |
441b62c1 | 1480 | __func__, status); |
eb6d8c2d | 1481 | } |
1da177e4 LT |
1482 | } |
1483 | ||
1da177e4 LT |
1484 | /* |
1485 | * The timer is currently only used to send queued packets to | |
1486 | * the tty in cases where the protocol provides no own handshaking | |
1487 | * to initiate the transfer. | |
1488 | */ | |
1489 | static void timeout_handler(unsigned long data) | |
1490 | { | |
1491 | struct garmin_data *garmin_data_p = (struct garmin_data *) data; | |
1492 | ||
1493 | /* send the next queued packet to the tty port */ | |
1494 | if (garmin_data_p->mode == MODE_NATIVE) | |
1495 | if (garmin_data_p->flags & FLAGS_QUEUING) | |
1496 | garmin_flush_queue(garmin_data_p); | |
1497 | } | |
1498 | ||
1499 | ||
1500 | ||
95da310e | 1501 | static int garmin_attach(struct usb_serial *serial) |
1da177e4 LT |
1502 | { |
1503 | int status = 0; | |
1504 | struct usb_serial_port *port = serial->port[0]; | |
af6d780b | 1505 | struct garmin_data *garmin_data_p = NULL; |
1da177e4 | 1506 | |
441b62c1 | 1507 | dbg("%s", __func__); |
1da177e4 | 1508 | |
7ac9da10 | 1509 | garmin_data_p = kzalloc(sizeof(struct garmin_data), GFP_KERNEL); |
1da177e4 | 1510 | if (garmin_data_p == NULL) { |
441b62c1 | 1511 | dev_err(&port->dev, "%s - Out of memory\n", __func__); |
1da177e4 LT |
1512 | return -ENOMEM; |
1513 | } | |
1da177e4 LT |
1514 | init_timer(&garmin_data_p->timer); |
1515 | spin_lock_init(&garmin_data_p->lock); | |
1516 | INIT_LIST_HEAD(&garmin_data_p->pktlist); | |
af6d780b | 1517 | /* garmin_data_p->timer.expires = jiffies + session_timeout; */ |
1da177e4 LT |
1518 | garmin_data_p->timer.data = (unsigned long)garmin_data_p; |
1519 | garmin_data_p->timer.function = timeout_handler; | |
1520 | garmin_data_p->port = port; | |
1521 | garmin_data_p->state = 0; | |
1522 | garmin_data_p->count = 0; | |
1523 | usb_set_serial_port_data(port, garmin_data_p); | |
1524 | ||
1525 | status = garmin_init_session(port); | |
1526 | ||
1527 | return status; | |
1528 | } | |
1529 | ||
1530 | ||
95da310e | 1531 | static void garmin_shutdown(struct usb_serial *serial) |
1da177e4 LT |
1532 | { |
1533 | struct usb_serial_port *port = serial->port[0]; | |
af6d780b | 1534 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
1da177e4 | 1535 | |
441b62c1 | 1536 | dbg("%s", __func__); |
1da177e4 | 1537 | |
af6d780b | 1538 | usb_kill_urb(port->interrupt_in_urb); |
1da177e4 | 1539 | del_timer_sync(&garmin_data_p->timer); |
af6d780b | 1540 | kfree(garmin_data_p); |
1da177e4 LT |
1541 | usb_set_serial_port_data(port, NULL); |
1542 | } | |
1543 | ||
1544 | ||
1da177e4 | 1545 | /* All of the device info needed */ |
ea65370d | 1546 | static struct usb_serial_driver garmin_device = { |
18fcac35 | 1547 | .driver = { |
eb6d8c2d HK |
1548 | .owner = THIS_MODULE, |
1549 | .name = "garmin_gps", | |
18fcac35 | 1550 | }, |
eb6d8c2d | 1551 | .description = "Garmin GPS usb/tty", |
d9b1b787 | 1552 | .usb_driver = &garmin_driver, |
1da177e4 | 1553 | .id_table = id_table, |
1da177e4 LT |
1554 | .num_ports = 1, |
1555 | .open = garmin_open, | |
1556 | .close = garmin_close, | |
1557 | .throttle = garmin_throttle, | |
1558 | .unthrottle = garmin_unthrottle, | |
1559 | .attach = garmin_attach, | |
1560 | .shutdown = garmin_shutdown, | |
1561 | .write = garmin_write, | |
1562 | .write_room = garmin_write_room, | |
1da177e4 LT |
1563 | .write_bulk_callback = garmin_write_bulk_callback, |
1564 | .read_bulk_callback = garmin_read_bulk_callback, | |
1565 | .read_int_callback = garmin_read_int_callback, | |
1566 | }; | |
1567 | ||
1568 | ||
eb6d8c2d | 1569 | |
af6d780b | 1570 | static int __init garmin_init(void) |
1da177e4 LT |
1571 | { |
1572 | int retval; | |
1573 | ||
1574 | retval = usb_serial_register(&garmin_device); | |
1575 | if (retval) | |
1576 | goto failed_garmin_register; | |
1577 | retval = usb_register(&garmin_driver); | |
1578 | if (retval) | |
1579 | goto failed_usb_register; | |
c197a8db GKH |
1580 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
1581 | DRIVER_DESC "\n"); | |
1da177e4 LT |
1582 | |
1583 | return 0; | |
1584 | failed_usb_register: | |
1585 | usb_serial_deregister(&garmin_device); | |
1586 | failed_garmin_register: | |
1587 | return retval; | |
1588 | } | |
1589 | ||
1590 | ||
af6d780b | 1591 | static void __exit garmin_exit(void) |
1da177e4 | 1592 | { |
af6d780b AC |
1593 | usb_deregister(&garmin_driver); |
1594 | usb_serial_deregister(&garmin_device); | |
1da177e4 LT |
1595 | } |
1596 | ||
1597 | ||
1598 | ||
1599 | ||
1600 | module_init(garmin_init); | |
1601 | module_exit(garmin_exit); | |
1602 | ||
af6d780b AC |
1603 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1604 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1605 | MODULE_LICENSE("GPL"); |
1606 | ||
1607 | module_param(debug, bool, S_IWUSR | S_IRUGO); | |
1608 | MODULE_PARM_DESC(debug, "Debug enabled or not"); | |
1609 | module_param(initial_mode, int, S_IRUGO); | |
1610 | MODULE_PARM_DESC(initial_mode, "Initial mode"); | |
1611 |