Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Garmin GPS driver |
| 3 | * |
Hermann Kneissel | b4026c4 | 2011-04-29 08:58:43 +0200 | [diff] [blame] | 4 | * Copyright (C) 2006-2011 Hermann Kneissel herkne@gmx.de |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 36 | #include <linux/uaccess.h> |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 37 | #include <linux/atomic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/usb.h> |
Greg Kroah-Hartman | a969888 | 2006-07-11 21:22:58 -0700 | [diff] [blame] | 39 | #include <linux/usb/serial.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | /* the mode to be set when the port ist opened */ |
| 42 | static int initial_mode = 1; |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #define GARMIN_VENDOR_ID 0x091E |
| 45 | |
| 46 | /* |
| 47 | * Version Information |
| 48 | */ |
| 49 | |
| 50 | #define VERSION_MAJOR 0 |
Hermann Kneissel | b4026c4 | 2011-04-29 08:58:43 +0200 | [diff] [blame] | 51 | #define VERSION_MINOR 36 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
| 53 | #define _STR(s) #s |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 54 | #define _DRIVER_VERSION(a, b) "v" _STR(a) "." _STR(b) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | #define DRIVER_VERSION _DRIVER_VERSION(VERSION_MAJOR, VERSION_MINOR) |
| 56 | #define DRIVER_AUTHOR "hermann kneissel" |
| 57 | #define DRIVER_DESC "garmin gps driver" |
| 58 | |
| 59 | /* error codes returned by the driver */ |
| 60 | #define EINVPKT 1000 /* invalid packet structure */ |
| 61 | |
| 62 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 63 | /* size of the header of a packet using the usb protocol */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #define GARMIN_PKTHDR_LENGTH 12 |
| 65 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 66 | /* max. possible size of a packet using the serial protocol */ |
| 67 | #define MAX_SERIAL_PKT_SIZ (3 + 255 + 3) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 69 | /* max. possible size of a packet with worst case stuffing */ |
| 70 | #define MAX_SERIAL_PKT_SIZ_STUFFED (MAX_SERIAL_PKT_SIZ + 256) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 72 | /* size of a buffer able to hold a complete (no stuffing) packet |
| 73 | * (the document protocol does not contain packets with a larger |
| 74 | * size, but in theory a packet may be 64k+12 bytes - if in |
| 75 | * later protocol versions larger packet sizes occur, this value |
| 76 | * should be increased accordingly, so the input buffer is always |
| 77 | * large enough the store a complete packet inclusive header) */ |
| 78 | #define GPS_IN_BUFSIZ (GARMIN_PKTHDR_LENGTH+MAX_SERIAL_PKT_SIZ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 80 | /* size of a buffer able to hold a complete (incl. stuffing) packet */ |
| 81 | #define GPS_OUT_BUFSIZ (GARMIN_PKTHDR_LENGTH+MAX_SERIAL_PKT_SIZ_STUFFED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 83 | /* where to place the packet id of a serial packet, so we can |
| 84 | * prepend the usb-packet header without the need to move the |
| 85 | * packets data */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | #define GSP_INITIAL_OFFSET (GARMIN_PKTHDR_LENGTH-2) |
| 87 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 88 | /* max. size of incoming private packets (header+1 param) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | #define PRIVPKTSIZ (GARMIN_PKTHDR_LENGTH+4) |
| 90 | |
| 91 | #define GARMIN_LAYERID_TRANSPORT 0 |
| 92 | #define GARMIN_LAYERID_APPL 20 |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 93 | /* our own layer-id to use for some control mechanisms */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | #define GARMIN_LAYERID_PRIVATE 0x01106E4B |
| 95 | |
| 96 | #define GARMIN_PKTID_PVT_DATA 51 |
| 97 | #define GARMIN_PKTID_L001_COMMAND_DATA 10 |
| 98 | |
| 99 | #define CMND_ABORT_TRANSFER 0 |
| 100 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 101 | /* packet ids used in private layer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | #define PRIV_PKTID_SET_DEBUG 1 |
| 103 | #define PRIV_PKTID_SET_MODE 2 |
| 104 | #define PRIV_PKTID_INFO_REQ 3 |
| 105 | #define PRIV_PKTID_INFO_RESP 4 |
| 106 | #define PRIV_PKTID_RESET_REQ 5 |
| 107 | #define PRIV_PKTID_SET_DEF_MODE 6 |
| 108 | |
| 109 | |
| 110 | #define ETX 0x03 |
| 111 | #define DLE 0x10 |
| 112 | #define ACK 0x06 |
| 113 | #define NAK 0x15 |
| 114 | |
| 115 | /* structure used to queue incoming packets */ |
| 116 | struct garmin_packet { |
| 117 | struct list_head list; |
| 118 | int seq; |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 119 | /* the real size of the data array, always > 0 */ |
| 120 | int size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | __u8 data[1]; |
| 122 | }; |
| 123 | |
| 124 | /* structure used to keep the current state of the driver */ |
| 125 | struct garmin_data { |
| 126 | __u8 state; |
| 127 | __u16 flags; |
| 128 | __u8 mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | __u8 count; |
| 130 | __u8 pkt_id; |
| 131 | __u32 serial_num; |
| 132 | struct timer_list timer; |
| 133 | struct usb_serial_port *port; |
| 134 | int seq_counter; |
| 135 | int insize; |
| 136 | int outsize; |
| 137 | __u8 inbuffer [GPS_IN_BUFSIZ]; /* tty -> usb */ |
| 138 | __u8 outbuffer[GPS_OUT_BUFSIZ]; /* usb -> tty */ |
| 139 | __u8 privpkt[4*6]; |
| 140 | spinlock_t lock; |
| 141 | struct list_head pktlist; |
| 142 | }; |
| 143 | |
| 144 | |
| 145 | #define STATE_NEW 0 |
| 146 | #define STATE_INITIAL_DELAY 1 |
| 147 | #define STATE_TIMEOUT 2 |
| 148 | #define STATE_SESSION_REQ1 3 |
| 149 | #define STATE_SESSION_REQ2 4 |
| 150 | #define STATE_ACTIVE 5 |
| 151 | |
| 152 | #define STATE_RESET 8 |
| 153 | #define STATE_DISCONNECTED 9 |
| 154 | #define STATE_WAIT_TTY_ACK 10 |
| 155 | #define STATE_GSP_WAIT_DATA 11 |
| 156 | |
| 157 | #define MODE_NATIVE 0 |
| 158 | #define MODE_GARMIN_SERIAL 1 |
| 159 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 160 | /* Flags used in garmin_data.flags: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | #define FLAGS_SESSION_REPLY_MASK 0x00C0 |
| 162 | #define FLAGS_SESSION_REPLY1_SEEN 0x0080 |
| 163 | #define FLAGS_SESSION_REPLY2_SEEN 0x0040 |
| 164 | #define FLAGS_BULK_IN_ACTIVE 0x0020 |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 165 | #define FLAGS_BULK_IN_RESTART 0x0010 |
| 166 | #define FLAGS_THROTTLED 0x0008 |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 167 | #define APP_REQ_SEEN 0x0004 |
| 168 | #define APP_RESP_SEEN 0x0002 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | #define CLEAR_HALT_REQUIRED 0x0001 |
| 170 | |
| 171 | #define FLAGS_QUEUING 0x0100 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | #define FLAGS_DROP_DATA 0x0800 |
| 173 | |
| 174 | #define FLAGS_GSP_SKIP 0x1000 |
| 175 | #define FLAGS_GSP_DLESEEN 0x2000 |
| 176 | |
| 177 | |
| 178 | |
| 179 | |
| 180 | |
| 181 | |
| 182 | /* function prototypes */ |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 183 | static int gsp_next_packet(struct garmin_data *garmin_data_p); |
| 184 | static int garmin_write_bulk(struct usb_serial_port *port, |
Hermann Kneissel | 468d136 | 2007-08-03 20:20:33 +0200 | [diff] [blame] | 185 | const unsigned char *buf, int count, |
| 186 | int dismiss_ack); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | |
| 188 | /* some special packets to be send or received */ |
| 189 | static unsigned char const GARMIN_START_SESSION_REQ[] |
| 190 | = { 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0 }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | static unsigned char const GARMIN_START_SESSION_REPLY[] |
| 192 | = { 0, 0, 0, 0, 6, 0, 0, 0, 4, 0, 0, 0 }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | static unsigned char const GARMIN_BULK_IN_AVAIL_REPLY[] |
| 194 | = { 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0 }; |
| 195 | static unsigned char const GARMIN_APP_LAYER_REPLY[] |
| 196 | = { 0x14, 0, 0, 0 }; |
| 197 | static unsigned char const GARMIN_START_PVT_REQ[] |
| 198 | = { 20, 0, 0, 0, 10, 0, 0, 0, 2, 0, 0, 0, 49, 0 }; |
| 199 | static unsigned char const GARMIN_STOP_PVT_REQ[] |
| 200 | = { 20, 0, 0, 0, 10, 0, 0, 0, 2, 0, 0, 0, 50, 0 }; |
| 201 | static unsigned char const GARMIN_STOP_TRANSFER_REQ[] |
| 202 | = { 20, 0, 0, 0, 10, 0, 0, 0, 2, 0, 0, 0, 0, 0 }; |
| 203 | static unsigned char const GARMIN_STOP_TRANSFER_REQ_V2[] |
| 204 | = { 20, 0, 0, 0, 10, 0, 0, 0, 1, 0, 0, 0, 0 }; |
| 205 | static unsigned char const PRIVATE_REQ[] |
| 206 | = { 0x4B, 0x6E, 0x10, 0x01, 0xFF, 0, 0, 0, 0xFF, 0, 0, 0 }; |
| 207 | |
| 208 | |
| 209 | |
Németh Márton | 7d40d7e | 2010-01-10 15:34:24 +0100 | [diff] [blame] | 210 | static const struct usb_device_id id_table[] = { |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 211 | /* the same device id seems to be used by all |
| 212 | usb enabled GPS devices */ |
| 213 | { USB_DEVICE(GARMIN_VENDOR_ID, 3) }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | { } /* Terminating entry */ |
| 215 | }; |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 216 | MODULE_DEVICE_TABLE(usb, id_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | static inline int getLayerId(const __u8 *usbPacket) |
| 220 | { |
| 221 | return __le32_to_cpup((__le32 *)(usbPacket)); |
| 222 | } |
| 223 | |
| 224 | static inline int getPacketId(const __u8 *usbPacket) |
| 225 | { |
| 226 | return __le32_to_cpup((__le32 *)(usbPacket+4)); |
| 227 | } |
| 228 | |
| 229 | static inline int getDataLength(const __u8 *usbPacket) |
| 230 | { |
| 231 | return __le32_to_cpup((__le32 *)(usbPacket+8)); |
| 232 | } |
| 233 | |
| 234 | |
| 235 | /* |
| 236 | * check if the usb-packet in buf contains an abort-transfer command. |
| 237 | * (if yes, all queued data will be dropped) |
| 238 | */ |
| 239 | static inline int isAbortTrfCmnd(const unsigned char *buf) |
| 240 | { |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 241 | if (0 == memcmp(buf, GARMIN_STOP_TRANSFER_REQ, |
| 242 | sizeof(GARMIN_STOP_TRANSFER_REQ)) || |
| 243 | 0 == memcmp(buf, GARMIN_STOP_TRANSFER_REQ_V2, |
| 244 | sizeof(GARMIN_STOP_TRANSFER_REQ_V2))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | return 1; |
| 246 | else |
| 247 | return 0; |
| 248 | } |
| 249 | |
| 250 | |
| 251 | |
| 252 | static void send_to_tty(struct usb_serial_port *port, |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 253 | char *data, unsigned int actual_length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | { |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 255 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | |
| 257 | if (tty && actual_length) { |
Greg Kroah-Hartman | 59d33f2 | 2012-09-18 09:58:57 +0100 | [diff] [blame] | 258 | usb_serial_debug_data(&port->dev, __func__, actual_length, data); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 259 | tty_insert_flip_string(tty, data, actual_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | tty_flip_buffer_push(tty); |
| 261 | } |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 262 | tty_kref_put(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | } |
| 264 | |
| 265 | |
| 266 | /****************************************************************************** |
| 267 | * packet queue handling |
| 268 | ******************************************************************************/ |
| 269 | |
| 270 | /* |
| 271 | * queue a received (usb-)packet for later processing |
| 272 | */ |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 273 | static int pkt_add(struct garmin_data *garmin_data_p, |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 274 | unsigned char *data, unsigned int data_length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | { |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 276 | int state = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | int result = 0; |
| 278 | unsigned long flags; |
| 279 | struct garmin_packet *pkt; |
| 280 | |
| 281 | /* process only packets containg data ... */ |
| 282 | if (data_length) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | pkt = kmalloc(sizeof(struct garmin_packet)+data_length, |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 284 | GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | if (pkt == NULL) { |
| 286 | dev_err(&garmin_data_p->port->dev, "out of memory\n"); |
| 287 | return 0; |
| 288 | } |
| 289 | pkt->size = data_length; |
| 290 | memcpy(pkt->data, data, data_length); |
| 291 | |
| 292 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 293 | garmin_data_p->flags |= FLAGS_QUEUING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | result = list_empty(&garmin_data_p->pktlist); |
| 295 | pkt->seq = garmin_data_p->seq_counter++; |
| 296 | list_add_tail(&pkt->list, &garmin_data_p->pktlist); |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 297 | state = garmin_data_p->state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
| 299 | |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 300 | dev_dbg(&garmin_data_p->port->dev, |
| 301 | "%s - added: pkt: %d - %d bytes\n", __func__, |
| 302 | pkt->seq, data_length); |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 303 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | /* in serial mode, if someone is waiting for data from |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 305 | the device, convert and send the next packet to tty. */ |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 306 | if (result && (state == STATE_GSP_WAIT_DATA)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | gsp_next_packet(garmin_data_p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | } |
| 309 | return result; |
| 310 | } |
| 311 | |
| 312 | |
| 313 | /* get the next pending packet */ |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 314 | static struct garmin_packet *pkt_pop(struct garmin_data *garmin_data_p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | { |
| 316 | unsigned long flags; |
| 317 | struct garmin_packet *result = NULL; |
| 318 | |
| 319 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
| 320 | if (!list_empty(&garmin_data_p->pktlist)) { |
| 321 | result = (struct garmin_packet *)garmin_data_p->pktlist.next; |
| 322 | list_del(&result->list); |
| 323 | } |
| 324 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
| 325 | return result; |
| 326 | } |
| 327 | |
| 328 | |
| 329 | /* free up all queued data */ |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 330 | static void pkt_clear(struct garmin_data *garmin_data_p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | { |
| 332 | unsigned long flags; |
| 333 | struct garmin_packet *result = NULL; |
| 334 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
| 336 | while (!list_empty(&garmin_data_p->pktlist)) { |
| 337 | result = (struct garmin_packet *)garmin_data_p->pktlist.next; |
| 338 | list_del(&result->list); |
| 339 | kfree(result); |
| 340 | } |
| 341 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
| 342 | } |
| 343 | |
| 344 | |
| 345 | /****************************************************************************** |
| 346 | * garmin serial protocol handling handling |
| 347 | ******************************************************************************/ |
| 348 | |
| 349 | /* send an ack packet back to the tty */ |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 350 | static int gsp_send_ack(struct garmin_data *garmin_data_p, __u8 pkt_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | { |
| 352 | __u8 pkt[10]; |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 353 | __u8 cksum = 0; |
| 354 | __u8 *ptr = pkt; |
| 355 | unsigned l = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 357 | dev_dbg(&garmin_data_p->port->dev, "%s - pkt-id: 0x%X.\n", __func__, |
| 358 | 0xFF & pkt_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
| 360 | *ptr++ = DLE; |
| 361 | *ptr++ = ACK; |
| 362 | cksum += ACK; |
| 363 | |
| 364 | *ptr++ = 2; |
| 365 | cksum += 2; |
| 366 | |
| 367 | *ptr++ = pkt_id; |
| 368 | cksum += pkt_id; |
| 369 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 370 | if (pkt_id == DLE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | *ptr++ = DLE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | |
| 373 | *ptr++ = 0; |
| 374 | *ptr++ = 0xFF & (-cksum); |
| 375 | *ptr++ = DLE; |
| 376 | *ptr++ = ETX; |
| 377 | |
| 378 | l = ptr-pkt; |
| 379 | |
| 380 | send_to_tty(garmin_data_p->port, pkt, l); |
| 381 | return 0; |
| 382 | } |
| 383 | |
| 384 | |
| 385 | |
| 386 | /* |
| 387 | * called for a complete packet received from tty layer |
| 388 | * |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 389 | * the complete packet (pktid ... cksum) is in garmin_data_p->inbuf starting |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | * at GSP_INITIAL_OFFSET. |
| 391 | * |
| 392 | * count - number of bytes in the input buffer including space reserved for |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 393 | * the usb header: GSP_INITIAL_OFFSET + number of bytes in packet |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | * (including pkt-id, data-length a. cksum) |
| 395 | */ |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 396 | static int gsp_rec_packet(struct garmin_data *garmin_data_p, int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | { |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 398 | struct device *dev = &garmin_data_p->port->dev; |
Hermann Kneissel | b4026c4 | 2011-04-29 08:58:43 +0200 | [diff] [blame] | 399 | unsigned long flags; |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 400 | const __u8 *recpkt = garmin_data_p->inbuffer+GSP_INITIAL_OFFSET; |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 401 | __le32 *usbdata = (__le32 *) garmin_data_p->inbuffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | int cksum = 0; |
| 403 | int n = 0; |
| 404 | int pktid = recpkt[0]; |
| 405 | int size = recpkt[1]; |
| 406 | |
Greg Kroah-Hartman | 59d33f2 | 2012-09-18 09:58:57 +0100 | [diff] [blame] | 407 | usb_serial_debug_data(&garmin_data_p->port->dev, __func__, |
| 408 | count-GSP_INITIAL_OFFSET, recpkt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | |
| 410 | if (size != (count-GSP_INITIAL_OFFSET-3)) { |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 411 | dev_dbg(dev, "%s - invalid size, expected %d bytes, got %d\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 412 | __func__, size, (count-GSP_INITIAL_OFFSET-3)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | return -EINVPKT; |
| 414 | } |
| 415 | |
| 416 | cksum += *recpkt++; |
| 417 | cksum += *recpkt++; |
| 418 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 419 | /* sanity check, remove after test ... */ |
| 420 | if ((__u8 *)&(usbdata[3]) != recpkt) { |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 421 | dev_dbg(dev, "%s - ptr mismatch %p - %p\n", __func__, |
| 422 | &(usbdata[4]), recpkt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | return -EINVPKT; |
| 424 | } |
| 425 | |
| 426 | while (n < size) { |
| 427 | cksum += *recpkt++; |
| 428 | n++; |
| 429 | } |
| 430 | |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 431 | if ((0xff & (cksum + *recpkt)) != 0) { |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 432 | dev_dbg(dev, "%s - invalid checksum, expected %02x, got %02x\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 433 | __func__, 0xff & -cksum, 0xff & *recpkt); |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 434 | return -EINVPKT; |
| 435 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | |
| 437 | usbdata[0] = __cpu_to_le32(GARMIN_LAYERID_APPL); |
| 438 | usbdata[1] = __cpu_to_le32(pktid); |
| 439 | usbdata[2] = __cpu_to_le32(size); |
| 440 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 441 | garmin_write_bulk(garmin_data_p->port, garmin_data_p->inbuffer, |
Hermann Kneissel | 468d136 | 2007-08-03 20:20:33 +0200 | [diff] [blame] | 442 | GARMIN_PKTHDR_LENGTH+size, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | |
| 444 | /* if this was an abort-transfer command, flush all |
| 445 | queued data. */ |
| 446 | if (isAbortTrfCmnd(garmin_data_p->inbuffer)) { |
Hermann Kneissel | b4026c4 | 2011-04-29 08:58:43 +0200 | [diff] [blame] | 447 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | garmin_data_p->flags |= FLAGS_DROP_DATA; |
Hermann Kneissel | b4026c4 | 2011-04-29 08:58:43 +0200 | [diff] [blame] | 449 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | pkt_clear(garmin_data_p); |
| 451 | } |
| 452 | |
| 453 | return count; |
| 454 | } |
| 455 | |
| 456 | |
| 457 | |
| 458 | /* |
| 459 | * Called for data received from tty |
| 460 | * |
| 461 | * buf contains the data read, it may span more than one packet or even |
| 462 | * incomplete packets |
| 463 | * |
| 464 | * input record should be a serial-record, but it may not be complete. |
| 465 | * Copy it into our local buffer, until an etx is seen (or an error |
| 466 | * occurs). |
| 467 | * Once the record is complete, convert into a usb packet and send it |
| 468 | * to the bulk pipe, send an ack back to the tty. |
| 469 | * |
| 470 | * If the input is an ack, just send the last queued packet to the |
| 471 | * tty layer. |
| 472 | * |
| 473 | * if the input is an abort command, drop all queued data. |
| 474 | */ |
| 475 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 476 | static int gsp_receive(struct garmin_data *garmin_data_p, |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 477 | const unsigned char *buf, int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | { |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 479 | struct device *dev = &garmin_data_p->port->dev; |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 480 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | int offs = 0; |
| 482 | int ack_or_nak_seen = 0; |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 483 | __u8 *dest; |
| 484 | int size; |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 485 | /* dleSeen: set if last byte read was a DLE */ |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 486 | int dleSeen; |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 487 | /* skip: if set, skip incoming data until possible start of |
| 488 | * new packet |
| 489 | */ |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 490 | int skip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | __u8 data; |
| 492 | |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 493 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
| 494 | dest = garmin_data_p->inbuffer; |
| 495 | size = garmin_data_p->insize; |
| 496 | dleSeen = garmin_data_p->flags & FLAGS_GSP_DLESEEN; |
| 497 | skip = garmin_data_p->flags & FLAGS_GSP_SKIP; |
| 498 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
| 499 | |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 500 | /* dev_dbg(dev, "%s - dle=%d skip=%d size=%d count=%d\n", |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 501 | __func__, dleSeen, skip, size, count); */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 503 | if (size == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | size = GSP_INITIAL_OFFSET; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | |
| 506 | while (offs < count) { |
| 507 | |
| 508 | data = *(buf+offs); |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 509 | offs++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | |
| 511 | if (data == DLE) { |
| 512 | if (skip) { /* start of a new pkt */ |
| 513 | skip = 0; |
| 514 | size = GSP_INITIAL_OFFSET; |
| 515 | dleSeen = 1; |
| 516 | } else if (dleSeen) { |
| 517 | dest[size++] = data; |
| 518 | dleSeen = 0; |
| 519 | } else { |
| 520 | dleSeen = 1; |
| 521 | } |
| 522 | } else if (data == ETX) { |
| 523 | if (dleSeen) { |
| 524 | /* packet complete */ |
| 525 | |
| 526 | data = dest[GSP_INITIAL_OFFSET]; |
| 527 | |
| 528 | if (data == ACK) { |
| 529 | ack_or_nak_seen = ACK; |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 530 | dev_dbg(dev, "ACK packet complete.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | } else if (data == NAK) { |
| 532 | ack_or_nak_seen = NAK; |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 533 | dev_dbg(dev, "NAK packet complete.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | } else { |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 535 | dev_dbg(dev, "packet complete - id=0x%X.\n", |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 536 | 0xFF & data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | gsp_rec_packet(garmin_data_p, size); |
| 538 | } |
| 539 | |
| 540 | skip = 1; |
| 541 | size = GSP_INITIAL_OFFSET; |
| 542 | dleSeen = 0; |
| 543 | } else { |
| 544 | dest[size++] = data; |
| 545 | } |
| 546 | } else if (!skip) { |
| 547 | |
| 548 | if (dleSeen) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | size = GSP_INITIAL_OFFSET; |
| 550 | dleSeen = 0; |
| 551 | } |
| 552 | |
| 553 | dest[size++] = data; |
| 554 | } |
| 555 | |
| 556 | if (size >= GPS_IN_BUFSIZ) { |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 557 | dev_dbg(dev, "%s - packet too large.\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | skip = 1; |
| 559 | size = GSP_INITIAL_OFFSET; |
| 560 | dleSeen = 0; |
| 561 | } |
| 562 | } |
| 563 | |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 564 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
| 565 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | garmin_data_p->insize = size; |
| 567 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 568 | /* copy flags back to structure */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | if (skip) |
| 570 | garmin_data_p->flags |= FLAGS_GSP_SKIP; |
| 571 | else |
| 572 | garmin_data_p->flags &= ~FLAGS_GSP_SKIP; |
| 573 | |
| 574 | if (dleSeen) |
| 575 | garmin_data_p->flags |= FLAGS_GSP_DLESEEN; |
| 576 | else |
| 577 | garmin_data_p->flags &= ~FLAGS_GSP_DLESEEN; |
| 578 | |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 579 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
| 580 | |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 581 | if (ack_or_nak_seen) { |
| 582 | if (gsp_next_packet(garmin_data_p) > 0) |
| 583 | garmin_data_p->state = STATE_ACTIVE; |
| 584 | else |
| 585 | garmin_data_p->state = STATE_GSP_WAIT_DATA; |
| 586 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | return count; |
| 588 | } |
| 589 | |
| 590 | |
| 591 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | /* |
| 593 | * Sends a usb packet to the tty |
| 594 | * |
| 595 | * Assumes, that all packages and at an usb-packet boundary. |
| 596 | * |
| 597 | * return <0 on error, 0 if packet is incomplete or > 0 if packet was sent |
| 598 | */ |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 599 | static int gsp_send(struct garmin_data *garmin_data_p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | const unsigned char *buf, int count) |
| 601 | { |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 602 | struct device *dev = &garmin_data_p->port->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | const unsigned char *src; |
| 604 | unsigned char *dst; |
| 605 | int pktid = 0; |
| 606 | int datalen = 0; |
| 607 | int cksum = 0; |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 608 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | int k; |
| 610 | |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 611 | dev_dbg(dev, "%s - state %d - %d bytes.\n", __func__, |
| 612 | garmin_data_p->state, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | |
| 614 | k = garmin_data_p->outsize; |
| 615 | if ((k+count) > GPS_OUT_BUFSIZ) { |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 616 | dev_dbg(dev, "packet too large\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | garmin_data_p->outsize = 0; |
| 618 | return -4; |
| 619 | } |
| 620 | |
| 621 | memcpy(garmin_data_p->outbuffer+k, buf, count); |
| 622 | k += count; |
| 623 | garmin_data_p->outsize = k; |
| 624 | |
| 625 | if (k >= GARMIN_PKTHDR_LENGTH) { |
| 626 | pktid = getPacketId(garmin_data_p->outbuffer); |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 627 | datalen = getDataLength(garmin_data_p->outbuffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | i = GARMIN_PKTHDR_LENGTH + datalen; |
| 629 | if (k < i) |
| 630 | return 0; |
| 631 | } else { |
| 632 | return 0; |
| 633 | } |
| 634 | |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 635 | dev_dbg(dev, "%s - %d bytes in buffer, %d bytes in pkt.\n", __func__, k, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | |
| 637 | /* garmin_data_p->outbuffer now contains a complete packet */ |
| 638 | |
Greg Kroah-Hartman | 59d33f2 | 2012-09-18 09:58:57 +0100 | [diff] [blame] | 639 | usb_serial_debug_data(&garmin_data_p->port->dev, __func__, k, |
| 640 | garmin_data_p->outbuffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | |
| 642 | garmin_data_p->outsize = 0; |
| 643 | |
| 644 | if (GARMIN_LAYERID_APPL != getLayerId(garmin_data_p->outbuffer)) { |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 645 | dev_dbg(dev, "not an application packet (%d)\n", |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 646 | getLayerId(garmin_data_p->outbuffer)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | return -1; |
| 648 | } |
| 649 | |
| 650 | if (pktid > 255) { |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 651 | dev_dbg(dev, "packet-id %d too large\n", pktid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | return -2; |
| 653 | } |
| 654 | |
| 655 | if (datalen > 255) { |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 656 | dev_dbg(dev, "packet-size %d too large\n", datalen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | return -3; |
| 658 | } |
| 659 | |
| 660 | /* the serial protocol should be able to handle this packet */ |
| 661 | |
| 662 | k = 0; |
| 663 | src = garmin_data_p->outbuffer+GARMIN_PKTHDR_LENGTH; |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 664 | for (i = 0; i < datalen; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | if (*src++ == DLE) |
| 666 | k++; |
| 667 | } |
| 668 | |
| 669 | src = garmin_data_p->outbuffer+GARMIN_PKTHDR_LENGTH; |
| 670 | if (k > (GARMIN_PKTHDR_LENGTH-2)) { |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 671 | /* can't add stuffing DLEs in place, move data to end |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 672 | of buffer ... */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | dst = garmin_data_p->outbuffer+GPS_OUT_BUFSIZ-datalen; |
| 674 | memcpy(dst, src, datalen); |
| 675 | src = dst; |
| 676 | } |
| 677 | |
| 678 | dst = garmin_data_p->outbuffer; |
| 679 | |
| 680 | *dst++ = DLE; |
| 681 | *dst++ = pktid; |
| 682 | cksum += pktid; |
| 683 | *dst++ = datalen; |
| 684 | cksum += datalen; |
| 685 | if (datalen == DLE) |
| 686 | *dst++ = DLE; |
| 687 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 688 | for (i = 0; i < datalen; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | __u8 c = *src++; |
| 690 | *dst++ = c; |
| 691 | cksum += c; |
| 692 | if (c == DLE) |
| 693 | *dst++ = DLE; |
| 694 | } |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 695 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | cksum = 0xFF & -cksum; |
| 697 | *dst++ = cksum; |
| 698 | if (cksum == DLE) |
| 699 | *dst++ = DLE; |
| 700 | *dst++ = DLE; |
| 701 | *dst++ = ETX; |
| 702 | |
| 703 | i = dst-garmin_data_p->outbuffer; |
| 704 | |
| 705 | send_to_tty(garmin_data_p->port, garmin_data_p->outbuffer, i); |
| 706 | |
| 707 | garmin_data_p->pkt_id = pktid; |
| 708 | garmin_data_p->state = STATE_WAIT_TTY_ACK; |
| 709 | |
| 710 | return i; |
| 711 | } |
| 712 | |
| 713 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | /* |
| 715 | * Process the next pending data packet - if there is one |
| 716 | */ |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 717 | static int gsp_next_packet(struct garmin_data *garmin_data_p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | { |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 719 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | struct garmin_packet *pkt = NULL; |
| 721 | |
| 722 | while ((pkt = pkt_pop(garmin_data_p)) != NULL) { |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 723 | dev_dbg(&garmin_data_p->port->dev, "%s - next pkt: %d\n", __func__, pkt->seq); |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 724 | result = gsp_send(garmin_data_p, pkt->data, pkt->size); |
| 725 | if (result > 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | kfree(pkt); |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 727 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | } |
| 729 | kfree(pkt); |
| 730 | } |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 731 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | } |
| 733 | |
| 734 | |
| 735 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | /****************************************************************************** |
| 737 | * garmin native mode |
| 738 | ******************************************************************************/ |
| 739 | |
| 740 | |
| 741 | /* |
| 742 | * Called for data received from tty |
| 743 | * |
| 744 | * The input data is expected to be in garmin usb-packet format. |
| 745 | * |
| 746 | * buf contains the data read, it may span more than one packet |
| 747 | * or even incomplete packets |
| 748 | */ |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 749 | static int nat_receive(struct garmin_data *garmin_data_p, |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 750 | const unsigned char *buf, int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | { |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 752 | unsigned long flags; |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 753 | __u8 *dest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | int offs = 0; |
| 755 | int result = count; |
| 756 | int len; |
| 757 | |
| 758 | while (offs < count) { |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 759 | /* if buffer contains header, copy rest of data */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | if (garmin_data_p->insize >= GARMIN_PKTHDR_LENGTH) |
| 761 | len = GARMIN_PKTHDR_LENGTH |
| 762 | +getDataLength(garmin_data_p->inbuffer); |
| 763 | else |
| 764 | len = GARMIN_PKTHDR_LENGTH; |
| 765 | |
| 766 | if (len >= GPS_IN_BUFSIZ) { |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 767 | /* seems to be an invalid packet, ignore rest |
| 768 | of input */ |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 769 | dev_dbg(&garmin_data_p->port->dev, |
| 770 | "%s - packet size too large: %d\n", |
| 771 | __func__, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | garmin_data_p->insize = 0; |
| 773 | count = 0; |
| 774 | result = -EINVPKT; |
| 775 | } else { |
| 776 | len -= garmin_data_p->insize; |
| 777 | if (len > (count-offs)) |
| 778 | len = (count-offs); |
| 779 | if (len > 0) { |
| 780 | dest = garmin_data_p->inbuffer |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 781 | + garmin_data_p->insize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | memcpy(dest, buf+offs, len); |
| 783 | garmin_data_p->insize += len; |
| 784 | offs += len; |
| 785 | } |
| 786 | } |
| 787 | |
| 788 | /* do we have a complete packet ? */ |
| 789 | if (garmin_data_p->insize >= GARMIN_PKTHDR_LENGTH) { |
| 790 | len = GARMIN_PKTHDR_LENGTH+ |
| 791 | getDataLength(garmin_data_p->inbuffer); |
| 792 | if (garmin_data_p->insize >= len) { |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 793 | garmin_write_bulk(garmin_data_p->port, |
| 794 | garmin_data_p->inbuffer, |
| 795 | len, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | garmin_data_p->insize = 0; |
| 797 | |
| 798 | /* if this was an abort-transfer command, |
| 799 | flush all queued data. */ |
| 800 | if (isAbortTrfCmnd(garmin_data_p->inbuffer)) { |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 801 | spin_lock_irqsave(&garmin_data_p->lock, |
| 802 | flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | garmin_data_p->flags |= FLAGS_DROP_DATA; |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 804 | spin_unlock_irqrestore( |
| 805 | &garmin_data_p->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | pkt_clear(garmin_data_p); |
| 807 | } |
| 808 | } |
| 809 | } |
| 810 | } |
| 811 | return result; |
| 812 | } |
| 813 | |
| 814 | |
| 815 | /****************************************************************************** |
| 816 | * private packets |
| 817 | ******************************************************************************/ |
| 818 | |
| 819 | static void priv_status_resp(struct usb_serial_port *port) |
| 820 | { |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 821 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | __le32 *pkt = (__le32 *)garmin_data_p->privpkt; |
| 823 | |
| 824 | pkt[0] = __cpu_to_le32(GARMIN_LAYERID_PRIVATE); |
| 825 | pkt[1] = __cpu_to_le32(PRIV_PKTID_INFO_RESP); |
| 826 | pkt[2] = __cpu_to_le32(12); |
| 827 | pkt[3] = __cpu_to_le32(VERSION_MAJOR << 16 | VERSION_MINOR); |
| 828 | pkt[4] = __cpu_to_le32(garmin_data_p->mode); |
| 829 | pkt[5] = __cpu_to_le32(garmin_data_p->serial_num); |
| 830 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 831 | send_to_tty(port, (__u8 *)pkt, 6 * 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | } |
| 833 | |
| 834 | |
| 835 | /****************************************************************************** |
| 836 | * Garmin specific driver functions |
| 837 | ******************************************************************************/ |
| 838 | |
| 839 | static int process_resetdev_request(struct usb_serial_port *port) |
| 840 | { |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 841 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | int status; |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 843 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 845 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | garmin_data_p->flags &= ~(CLEAR_HALT_REQUIRED); |
| 847 | garmin_data_p->state = STATE_RESET; |
| 848 | garmin_data_p->serial_num = 0; |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 849 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 851 | usb_kill_urb(port->interrupt_in_urb); |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 852 | dev_dbg(&port->dev, "%s - usb_reset_device\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | status = usb_reset_device(port->serial->dev); |
| 854 | if (status) |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 855 | dev_dbg(&port->dev, "%s - usb_reset_device failed: %d\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 856 | __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | return status; |
| 858 | } |
| 859 | |
| 860 | |
| 861 | |
| 862 | /* |
| 863 | * clear all cached data |
| 864 | */ |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 865 | static int garmin_clear(struct garmin_data *garmin_data_p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | { |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 867 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | int status = 0; |
| 869 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | /* flush all queued data */ |
| 871 | pkt_clear(garmin_data_p); |
| 872 | |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 873 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | garmin_data_p->insize = 0; |
| 875 | garmin_data_p->outsize = 0; |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 876 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | |
| 878 | return status; |
| 879 | } |
| 880 | |
| 881 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | static int garmin_init_session(struct usb_serial_port *port) |
| 883 | { |
| 884 | struct usb_serial *serial = port->serial; |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 885 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | int status = 0; |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 887 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | |
| 889 | if (status == 0) { |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 890 | usb_kill_urb(port->interrupt_in_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 892 | dev_dbg(&serial->dev->dev, "%s - adding interrupt input\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | status = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
| 894 | if (status) |
| 895 | dev_err(&serial->dev->dev, |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 896 | "%s - failed submitting interrupt urb, error %d\n", |
| 897 | __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | } |
| 899 | |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 900 | /* |
| 901 | * using the initialization method from gpsbabel. See comments in |
| 902 | * gpsbabel/jeeps/gpslibusb.c gusb_reset_toggles() |
| 903 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | if (status == 0) { |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 905 | dev_dbg(&serial->dev->dev, "%s - starting session ...\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | garmin_data_p->state = STATE_ACTIVE; |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 907 | |
| 908 | for (i = 0; i < 3; i++) { |
| 909 | status = garmin_write_bulk(port, |
| 910 | GARMIN_START_SESSION_REQ, |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 911 | sizeof(GARMIN_START_SESSION_REQ), 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 913 | if (status < 0) |
| 914 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | } |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 916 | |
| 917 | if (status > 0) |
| 918 | status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | } |
| 920 | |
| 921 | return status; |
| 922 | } |
| 923 | |
| 924 | |
| 925 | |
Alan Cox | a509a7e | 2009-09-19 13:13:26 -0700 | [diff] [blame] | 926 | static int garmin_open(struct tty_struct *tty, struct usb_serial_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | { |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 928 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | int status = 0; |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 930 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 932 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | garmin_data_p->mode = initial_mode; |
| 934 | garmin_data_p->count = 0; |
Hermann Kneissel | b4026c4 | 2011-04-29 08:58:43 +0200 | [diff] [blame] | 935 | garmin_data_p->flags &= FLAGS_SESSION_REPLY1_SEEN; |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 936 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | |
| 938 | /* shutdown any bulk reads that might be going on */ |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 939 | usb_kill_urb(port->write_urb); |
| 940 | usb_kill_urb(port->read_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 942 | if (garmin_data_p->state == STATE_RESET) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | status = garmin_init_session(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | |
| 945 | garmin_data_p->state = STATE_ACTIVE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | return status; |
| 947 | } |
| 948 | |
| 949 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 950 | static void garmin_close(struct usb_serial_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | { |
| 952 | struct usb_serial *serial = port->serial; |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 953 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 955 | dev_dbg(&port->dev, "%s - port %d - mode=%d state=%d flags=0x%X\n", |
| 956 | __func__, port->number, garmin_data_p->mode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | garmin_data_p->state, garmin_data_p->flags); |
| 958 | |
| 959 | if (!serial) |
| 960 | return; |
| 961 | |
Oliver Neukum | 95bef01 | 2008-01-22 13:56:18 +0100 | [diff] [blame] | 962 | mutex_lock(&port->serial->disc_mutex); |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 963 | |
Oliver Neukum | 95bef01 | 2008-01-22 13:56:18 +0100 | [diff] [blame] | 964 | if (!port->serial->disconnected) |
| 965 | garmin_clear(garmin_data_p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | |
| 967 | /* shutdown our urbs */ |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 968 | usb_kill_urb(port->read_urb); |
| 969 | usb_kill_urb(port->write_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 971 | /* keep reset state so we know that we must start a new session */ |
| 972 | if (garmin_data_p->state != STATE_RESET) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | garmin_data_p->state = STATE_DISCONNECTED; |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 974 | |
Oliver Neukum | 95bef01 | 2008-01-22 13:56:18 +0100 | [diff] [blame] | 975 | mutex_unlock(&port->serial->disc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | } |
| 977 | |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 978 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 979 | static void garmin_write_bulk_callback(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | { |
Ming Lei | cdc9779 | 2008-02-24 18:41:47 +0800 | [diff] [blame] | 981 | struct usb_serial_port *port = urb->context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | |
Hermann Kneissel | 468d136 | 2007-08-03 20:20:33 +0200 | [diff] [blame] | 983 | if (port) { |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 984 | struct garmin_data *garmin_data_p = |
| 985 | usb_get_serial_port_data(port); |
Hermann Kneissel | 468d136 | 2007-08-03 20:20:33 +0200 | [diff] [blame] | 986 | |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 987 | if (GARMIN_LAYERID_APPL == getLayerId(urb->transfer_buffer)) { |
| 988 | |
| 989 | if (garmin_data_p->mode == MODE_GARMIN_SERIAL) { |
| 990 | gsp_send_ack(garmin_data_p, |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 991 | ((__u8 *)urb->transfer_buffer)[4]); |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 992 | } |
Hermann Kneissel | 468d136 | 2007-08-03 20:20:33 +0200 | [diff] [blame] | 993 | } |
Hermann Kneissel | 468d136 | 2007-08-03 20:20:33 +0200 | [diff] [blame] | 994 | usb_serial_port_softint(port); |
| 995 | } |
| 996 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 997 | /* Ignore errors that resulted from garmin_write_bulk with |
| 998 | dismiss_ack = 1 */ |
Hermann Kneissel | 468d136 | 2007-08-03 20:20:33 +0200 | [diff] [blame] | 999 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | /* free up the transfer buffer, as usb_free_urb() does not do this */ |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1001 | kfree(urb->transfer_buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | } |
| 1003 | |
| 1004 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1005 | static int garmin_write_bulk(struct usb_serial_port *port, |
Hermann Kneissel | 468d136 | 2007-08-03 20:20:33 +0200 | [diff] [blame] | 1006 | const unsigned char *buf, int count, |
| 1007 | int dismiss_ack) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | { |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1009 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | struct usb_serial *serial = port->serial; |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1011 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | struct urb *urb; |
| 1013 | unsigned char *buffer; |
| 1014 | int status; |
| 1015 | |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1016 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | garmin_data_p->flags &= ~FLAGS_DROP_DATA; |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1018 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1020 | buffer = kmalloc(count, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | if (!buffer) { |
| 1022 | dev_err(&port->dev, "out of memory\n"); |
| 1023 | return -ENOMEM; |
| 1024 | } |
| 1025 | |
| 1026 | urb = usb_alloc_urb(0, GFP_ATOMIC); |
| 1027 | if (!urb) { |
| 1028 | dev_err(&port->dev, "no more free urbs\n"); |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1029 | kfree(buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | return -ENOMEM; |
| 1031 | } |
| 1032 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1033 | memcpy(buffer, buf, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | |
Greg Kroah-Hartman | 59d33f2 | 2012-09-18 09:58:57 +0100 | [diff] [blame] | 1035 | usb_serial_debug_data(&port->dev, __func__, count, buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1037 | usb_fill_bulk_urb(urb, serial->dev, |
| 1038 | usb_sndbulkpipe(serial->dev, |
| 1039 | port->bulk_out_endpointAddress), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | buffer, count, |
Hermann Kneissel | 468d136 | 2007-08-03 20:20:33 +0200 | [diff] [blame] | 1041 | garmin_write_bulk_callback, |
| 1042 | dismiss_ack ? NULL : port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | urb->transfer_flags |= URB_ZERO_PACKET; |
| 1044 | |
| 1045 | if (GARMIN_LAYERID_APPL == getLayerId(buffer)) { |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 1046 | |
| 1047 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
| 1048 | garmin_data_p->flags |= APP_REQ_SEEN; |
| 1049 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
| 1050 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | if (garmin_data_p->mode == MODE_GARMIN_SERIAL) { |
| 1052 | pkt_clear(garmin_data_p); |
| 1053 | garmin_data_p->state = STATE_GSP_WAIT_DATA; |
| 1054 | } |
| 1055 | } |
| 1056 | |
| 1057 | /* send it down the pipe */ |
| 1058 | status = usb_submit_urb(urb, GFP_ATOMIC); |
| 1059 | if (status) { |
| 1060 | dev_err(&port->dev, |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1061 | "%s - usb_submit_urb(write bulk) failed with status = %d\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1062 | __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | count = status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | } |
| 1065 | |
| 1066 | /* we are done with this urb, so let the host driver |
| 1067 | * really free it when it is finished with it */ |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1068 | usb_free_urb(urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | |
| 1070 | return count; |
| 1071 | } |
| 1072 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1073 | static int garmin_write(struct tty_struct *tty, struct usb_serial_port *port, |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1074 | const unsigned char *buf, int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | { |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 1076 | struct device *dev = &port->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | int pktid, pktsiz, len; |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1078 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | __le32 *privpkt = (__le32 *)garmin_data_p->privpkt; |
| 1080 | |
Greg Kroah-Hartman | 59d33f2 | 2012-09-18 09:58:57 +0100 | [diff] [blame] | 1081 | usb_serial_debug_data(dev, __func__, count, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 1083 | if (garmin_data_p->state == STATE_RESET) |
| 1084 | return -EIO; |
| 1085 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | /* check for our private packets */ |
| 1087 | if (count >= GARMIN_PKTHDR_LENGTH) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | len = PRIVPKTSIZ; |
| 1089 | if (count < len) |
| 1090 | len = count; |
| 1091 | |
| 1092 | memcpy(garmin_data_p->privpkt, buf, len); |
| 1093 | |
| 1094 | pktsiz = getDataLength(garmin_data_p->privpkt); |
| 1095 | pktid = getPacketId(garmin_data_p->privpkt); |
| 1096 | |
| 1097 | if (count == (GARMIN_PKTHDR_LENGTH+pktsiz) |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1098 | && GARMIN_LAYERID_PRIVATE == |
| 1099 | getLayerId(garmin_data_p->privpkt)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 1101 | dev_dbg(dev, "%s - processing private request %d\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1102 | __func__, pktid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1104 | /* drop all unfinished transfers */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | garmin_clear(garmin_data_p); |
| 1106 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1107 | switch (pktid) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | case PRIV_PKTID_SET_MODE: |
| 1109 | if (pktsiz != 4) |
| 1110 | return -EINVPKT; |
| 1111 | garmin_data_p->mode = __le32_to_cpu(privpkt[3]); |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 1112 | dev_dbg(dev, "%s - mode set to %d\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1113 | __func__, garmin_data_p->mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | break; |
| 1115 | |
| 1116 | case PRIV_PKTID_INFO_REQ: |
| 1117 | priv_status_resp(port); |
| 1118 | break; |
| 1119 | |
| 1120 | case PRIV_PKTID_RESET_REQ: |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 1121 | process_resetdev_request(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | break; |
| 1123 | |
| 1124 | case PRIV_PKTID_SET_DEF_MODE: |
| 1125 | if (pktsiz != 4) |
| 1126 | return -EINVPKT; |
| 1127 | initial_mode = __le32_to_cpu(privpkt[3]); |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 1128 | dev_dbg(dev, "%s - initial_mode set to %d\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1129 | __func__, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | garmin_data_p->mode); |
| 1131 | break; |
| 1132 | } |
| 1133 | return count; |
| 1134 | } |
| 1135 | } |
| 1136 | |
| 1137 | if (garmin_data_p->mode == MODE_GARMIN_SERIAL) { |
| 1138 | return gsp_receive(garmin_data_p, buf, count); |
| 1139 | } else { /* MODE_NATIVE */ |
| 1140 | return nat_receive(garmin_data_p, buf, count); |
| 1141 | } |
| 1142 | } |
| 1143 | |
| 1144 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1145 | static int garmin_write_room(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1147 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | /* |
| 1149 | * Report back the bytes currently available in the output buffer. |
| 1150 | */ |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1151 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | return GPS_OUT_BUFSIZ-garmin_data_p->outsize; |
| 1153 | } |
| 1154 | |
| 1155 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1156 | static void garmin_read_process(struct garmin_data *garmin_data_p, |
Hermann Kneissel | b4026c4 | 2011-04-29 08:58:43 +0200 | [diff] [blame] | 1157 | unsigned char *data, unsigned data_length, |
| 1158 | int bulk_data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | { |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 1160 | unsigned long flags; |
| 1161 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | if (garmin_data_p->flags & FLAGS_DROP_DATA) { |
| 1163 | /* abort-transfer cmd is actice */ |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 1164 | dev_dbg(&garmin_data_p->port->dev, "%s - pkt dropped\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | } else if (garmin_data_p->state != STATE_DISCONNECTED && |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1166 | garmin_data_p->state != STATE_RESET) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1168 | /* if throttling is active or postprecessing is required |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1169 | put the received data in the input queue, otherwise |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | send it directly to the tty port */ |
| 1171 | if (garmin_data_p->flags & FLAGS_QUEUING) { |
| 1172 | pkt_add(garmin_data_p, data, data_length); |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 1173 | } else if (bulk_data || |
Hermann Kneissel | b4026c4 | 2011-04-29 08:58:43 +0200 | [diff] [blame] | 1174 | getLayerId(data) == GARMIN_LAYERID_APPL) { |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 1175 | |
| 1176 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
| 1177 | garmin_data_p->flags |= APP_RESP_SEEN; |
| 1178 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
| 1179 | |
| 1180 | if (garmin_data_p->mode == MODE_GARMIN_SERIAL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | pkt_add(garmin_data_p, data, data_length); |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 1182 | } else { |
| 1183 | send_to_tty(garmin_data_p->port, data, |
| 1184 | data_length); |
| 1185 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | } |
Hermann Kneissel | b4072f4 | 2009-04-26 22:42:04 +0200 | [diff] [blame] | 1187 | /* ignore system layer packets ... */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | } |
| 1189 | } |
| 1190 | |
| 1191 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1192 | static void garmin_read_bulk_callback(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | { |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1194 | unsigned long flags; |
Ming Lei | cdc9779 | 2008-02-24 18:41:47 +0800 | [diff] [blame] | 1195 | struct usb_serial_port *port = urb->context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | struct usb_serial *serial = port->serial; |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1197 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | unsigned char *data = urb->transfer_buffer; |
Greg Kroah-Hartman | f9feb51 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 1199 | int status = urb->status; |
| 1200 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | if (!serial) { |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 1203 | dev_dbg(&urb->dev->dev, "%s - bad serial pointer, exiting\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | return; |
| 1205 | } |
| 1206 | |
Greg Kroah-Hartman | f9feb51 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 1207 | if (status) { |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 1208 | dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1209 | __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | return; |
| 1211 | } |
| 1212 | |
Greg Kroah-Hartman | 59d33f2 | 2012-09-18 09:58:57 +0100 | [diff] [blame] | 1213 | usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | |
Hermann Kneissel | b4026c4 | 2011-04-29 08:58:43 +0200 | [diff] [blame] | 1215 | garmin_read_process(garmin_data_p, data, urb->actual_length, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1217 | if (urb->actual_length == 0 && |
| 1218 | 0 != (garmin_data_p->flags & FLAGS_BULK_IN_RESTART)) { |
| 1219 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
| 1220 | garmin_data_p->flags &= ~FLAGS_BULK_IN_RESTART; |
| 1221 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
Greg Kroah-Hartman | f9feb51 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 1222 | retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
| 1223 | if (retval) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | dev_err(&port->dev, |
| 1225 | "%s - failed resubmitting read urb, error %d\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1226 | __func__, retval); |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1227 | } else if (urb->actual_length > 0) { |
| 1228 | /* Continue trying to read until nothing more is received */ |
| 1229 | if (0 == (garmin_data_p->flags & FLAGS_THROTTLED)) { |
Greg Kroah-Hartman | f9feb51 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 1230 | retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
| 1231 | if (retval) |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1232 | dev_err(&port->dev, |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 1233 | "%s - failed resubmitting read urb, error %d\n", |
| 1234 | __func__, retval); |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1235 | } |
| 1236 | } else { |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 1237 | dev_dbg(&port->dev, "%s - end of bulk data\n", __func__); |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1238 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
| 1239 | garmin_data_p->flags &= ~FLAGS_BULK_IN_ACTIVE; |
| 1240 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | } |
| 1243 | |
| 1244 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1245 | static void garmin_read_int_callback(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | { |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1247 | unsigned long flags; |
Greg Kroah-Hartman | f9feb51 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 1248 | int retval; |
Ming Lei | cdc9779 | 2008-02-24 18:41:47 +0800 | [diff] [blame] | 1249 | struct usb_serial_port *port = urb->context; |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1250 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1251 | unsigned char *data = urb->transfer_buffer; |
Greg Kroah-Hartman | f9feb51 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 1252 | int status = urb->status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | |
Greg Kroah-Hartman | f9feb51 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 1254 | switch (status) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | case 0: |
| 1256 | /* success */ |
| 1257 | break; |
| 1258 | case -ECONNRESET: |
| 1259 | case -ENOENT: |
| 1260 | case -ESHUTDOWN: |
| 1261 | /* this urb is terminated, clean up */ |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 1262 | dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1263 | __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | return; |
| 1265 | default: |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 1266 | dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1267 | __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1268 | return; |
| 1269 | } |
| 1270 | |
Greg Kroah-Hartman | 59d33f2 | 2012-09-18 09:58:57 +0100 | [diff] [blame] | 1271 | usb_serial_debug_data(&port->dev, __func__, urb->actual_length, |
| 1272 | urb->transfer_buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | |
| 1274 | if (urb->actual_length == sizeof(GARMIN_BULK_IN_AVAIL_REPLY) && |
| 1275 | 0 == memcmp(data, GARMIN_BULK_IN_AVAIL_REPLY, |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1276 | sizeof(GARMIN_BULK_IN_AVAIL_REPLY))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 1278 | dev_dbg(&port->dev, "%s - bulk data available.\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1280 | if (0 == (garmin_data_p->flags & FLAGS_BULK_IN_ACTIVE)) { |
| 1281 | |
| 1282 | /* bulk data available */ |
Greg Kroah-Hartman | f9feb51 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 1283 | retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
| 1284 | if (retval) { |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1285 | dev_err(&port->dev, |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1286 | "%s - failed submitting read urb, error %d\n", |
| 1287 | __func__, retval); |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1288 | } else { |
| 1289 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
| 1290 | garmin_data_p->flags |= FLAGS_BULK_IN_ACTIVE; |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1291 | spin_unlock_irqrestore(&garmin_data_p->lock, |
| 1292 | flags); |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1293 | } |
| 1294 | } else { |
| 1295 | /* bulk-in transfer still active */ |
| 1296 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
| 1297 | garmin_data_p->flags |= FLAGS_BULK_IN_RESTART; |
| 1298 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | } |
| 1300 | |
| 1301 | } else if (urb->actual_length == (4+sizeof(GARMIN_START_SESSION_REPLY)) |
| 1302 | && 0 == memcmp(data, GARMIN_START_SESSION_REPLY, |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1303 | sizeof(GARMIN_START_SESSION_REPLY))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1305 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | garmin_data_p->flags |= FLAGS_SESSION_REPLY1_SEEN; |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1307 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | |
| 1309 | /* save the serial number */ |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1310 | garmin_data_p->serial_num = __le32_to_cpup( |
| 1311 | (__le32 *)(data+GARMIN_PKTHDR_LENGTH)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | |
Greg Kroah-Hartman | 7065e82 | 2012-09-14 11:50:30 -0700 | [diff] [blame] | 1313 | dev_dbg(&port->dev, "%s - start-of-session reply seen - serial %u.\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1314 | __func__, garmin_data_p->serial_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | } |
| 1316 | |
Hermann Kneissel | b4026c4 | 2011-04-29 08:58:43 +0200 | [diff] [blame] | 1317 | garmin_read_process(garmin_data_p, data, urb->actual_length, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1318 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1319 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
Greg Kroah-Hartman | f9feb51 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 1320 | if (retval) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | dev_err(&urb->dev->dev, |
| 1322 | "%s - Error %d submitting interrupt urb\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1323 | __func__, retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | } |
| 1325 | |
| 1326 | |
| 1327 | /* |
| 1328 | * Sends the next queued packt to the tty port (garmin native mode only) |
| 1329 | * and then sets a timer to call itself again until all queued data |
| 1330 | * is sent. |
| 1331 | */ |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1332 | static int garmin_flush_queue(struct garmin_data *garmin_data_p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | { |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1334 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | struct garmin_packet *pkt; |
| 1336 | |
| 1337 | if ((garmin_data_p->flags & FLAGS_THROTTLED) == 0) { |
| 1338 | pkt = pkt_pop(garmin_data_p); |
| 1339 | if (pkt != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | send_to_tty(garmin_data_p->port, pkt->data, pkt->size); |
| 1341 | kfree(pkt); |
| 1342 | mod_timer(&garmin_data_p->timer, (1)+jiffies); |
| 1343 | |
| 1344 | } else { |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1345 | spin_lock_irqsave(&garmin_data_p->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | garmin_data_p->flags &= ~FLAGS_QUEUING; |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1347 | spin_unlock_irqrestore(&garmin_data_p->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | } |
| 1349 | } |
| 1350 | return 0; |
| 1351 | } |
| 1352 | |
| 1353 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1354 | static void garmin_throttle(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1356 | struct usb_serial_port *port = tty->driver_data; |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1357 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | /* set flag, data received will be put into a queue |
| 1360 | for later processing */ |
Oliver Neukum | 6383251 | 2009-10-07 10:50:23 +0200 | [diff] [blame] | 1361 | spin_lock_irq(&garmin_data_p->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | garmin_data_p->flags |= FLAGS_QUEUING|FLAGS_THROTTLED; |
Oliver Neukum | 6383251 | 2009-10-07 10:50:23 +0200 | [diff] [blame] | 1363 | spin_unlock_irq(&garmin_data_p->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | } |
| 1365 | |
| 1366 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1367 | static void garmin_unthrottle(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1369 | struct usb_serial_port *port = tty->driver_data; |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1370 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1371 | int status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | |
Oliver Neukum | 6383251 | 2009-10-07 10:50:23 +0200 | [diff] [blame] | 1373 | spin_lock_irq(&garmin_data_p->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | garmin_data_p->flags &= ~FLAGS_THROTTLED; |
Oliver Neukum | 6383251 | 2009-10-07 10:50:23 +0200 | [diff] [blame] | 1375 | spin_unlock_irq(&garmin_data_p->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | |
| 1377 | /* in native mode send queued data to tty, in |
| 1378 | serial mode nothing needs to be done here */ |
| 1379 | if (garmin_data_p->mode == MODE_NATIVE) |
| 1380 | garmin_flush_queue(garmin_data_p); |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1381 | |
| 1382 | if (0 != (garmin_data_p->flags & FLAGS_BULK_IN_ACTIVE)) { |
Oliver Neukum | 6383251 | 2009-10-07 10:50:23 +0200 | [diff] [blame] | 1383 | status = usb_submit_urb(port->read_urb, GFP_KERNEL); |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1384 | if (status) |
| 1385 | dev_err(&port->dev, |
| 1386 | "%s - failed resubmitting read urb, error %d\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1387 | __func__, status); |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1388 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | } |
| 1390 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | /* |
| 1392 | * The timer is currently only used to send queued packets to |
| 1393 | * the tty in cases where the protocol provides no own handshaking |
| 1394 | * to initiate the transfer. |
| 1395 | */ |
| 1396 | static void timeout_handler(unsigned long data) |
| 1397 | { |
| 1398 | struct garmin_data *garmin_data_p = (struct garmin_data *) data; |
| 1399 | |
| 1400 | /* send the next queued packet to the tty port */ |
| 1401 | if (garmin_data_p->mode == MODE_NATIVE) |
| 1402 | if (garmin_data_p->flags & FLAGS_QUEUING) |
| 1403 | garmin_flush_queue(garmin_data_p); |
| 1404 | } |
| 1405 | |
| 1406 | |
| 1407 | |
Alan Stern | db5c8b5 | 2012-10-10 14:10:21 -0400 | [diff] [blame] | 1408 | static int garmin_port_probe(struct usb_serial_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1409 | { |
Alan Stern | db5c8b5 | 2012-10-10 14:10:21 -0400 | [diff] [blame] | 1410 | int status; |
| 1411 | struct garmin_data *garmin_data_p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | |
Burman Yan | 7ac9da1 | 2006-11-22 20:54:38 +0200 | [diff] [blame] | 1413 | garmin_data_p = kzalloc(sizeof(struct garmin_data), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | if (garmin_data_p == NULL) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1415 | dev_err(&port->dev, "%s - Out of memory\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1416 | return -ENOMEM; |
| 1417 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | init_timer(&garmin_data_p->timer); |
| 1419 | spin_lock_init(&garmin_data_p->lock); |
| 1420 | INIT_LIST_HEAD(&garmin_data_p->pktlist); |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1421 | /* garmin_data_p->timer.expires = jiffies + session_timeout; */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | garmin_data_p->timer.data = (unsigned long)garmin_data_p; |
| 1423 | garmin_data_p->timer.function = timeout_handler; |
| 1424 | garmin_data_p->port = port; |
| 1425 | garmin_data_p->state = 0; |
Hermann Kneissel | b4026c4 | 2011-04-29 08:58:43 +0200 | [diff] [blame] | 1426 | garmin_data_p->flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | garmin_data_p->count = 0; |
| 1428 | usb_set_serial_port_data(port, garmin_data_p); |
| 1429 | |
| 1430 | status = garmin_init_session(port); |
| 1431 | |
| 1432 | return status; |
| 1433 | } |
| 1434 | |
| 1435 | |
Alan Stern | db5c8b5 | 2012-10-10 14:10:21 -0400 | [diff] [blame] | 1436 | static int garmin_port_remove(struct usb_serial_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1437 | { |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1438 | struct garmin_data *garmin_data_p = usb_get_serial_port_data(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1440 | usb_kill_urb(port->interrupt_in_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | del_timer_sync(&garmin_data_p->timer); |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1442 | kfree(garmin_data_p); |
Alan Stern | db5c8b5 | 2012-10-10 14:10:21 -0400 | [diff] [blame] | 1443 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | } |
| 1445 | |
| 1446 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | /* All of the device info needed */ |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1448 | static struct usb_serial_driver garmin_device = { |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1449 | .driver = { |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1450 | .owner = THIS_MODULE, |
| 1451 | .name = "garmin_gps", |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1452 | }, |
Hermann Kneissel | eb6d8c2 | 2006-07-11 19:41:33 +0200 | [diff] [blame] | 1453 | .description = "Garmin GPS usb/tty", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | .id_table = id_table, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1455 | .num_ports = 1, |
| 1456 | .open = garmin_open, |
| 1457 | .close = garmin_close, |
| 1458 | .throttle = garmin_throttle, |
| 1459 | .unthrottle = garmin_unthrottle, |
Alan Stern | db5c8b5 | 2012-10-10 14:10:21 -0400 | [diff] [blame] | 1460 | .port_probe = garmin_port_probe, |
| 1461 | .port_remove = garmin_port_remove, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1462 | .write = garmin_write, |
| 1463 | .write_room = garmin_write_room, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1464 | .write_bulk_callback = garmin_write_bulk_callback, |
| 1465 | .read_bulk_callback = garmin_read_bulk_callback, |
| 1466 | .read_int_callback = garmin_read_int_callback, |
| 1467 | }; |
| 1468 | |
Alan Stern | 97b6b6d | 2012-02-23 14:56:32 -0500 | [diff] [blame] | 1469 | static struct usb_serial_driver * const serial_drivers[] = { |
| 1470 | &garmin_device, NULL |
| 1471 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | |
Greg Kroah-Hartman | 68e2411 | 2012-05-08 15:46:14 -0700 | [diff] [blame] | 1473 | module_usb_serial_driver(serial_drivers, id_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | |
Alan Cox | af6d780 | 2008-07-22 11:11:44 +0100 | [diff] [blame] | 1475 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 1476 | MODULE_DESCRIPTION(DRIVER_DESC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | MODULE_LICENSE("GPL"); |
| 1478 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | module_param(initial_mode, int, S_IRUGO); |
| 1480 | MODULE_PARM_DESC(initial_mode, "Initial mode"); |