^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Garmin GPS driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2006-2011 Hermann Kneissel herkne@gmx.de
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * The latest version of the driver can be found at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * http://sourceforge.net/projects/garmin-gps/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * This driver has been derived from v2.1 of the visor driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/tty.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/tty_driver.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/tty_flip.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/atomic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/usb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/usb/serial.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) /* the mode to be set when the port ist opened */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static int initial_mode = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define GARMIN_VENDOR_ID 0x091E
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * Version Information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define VERSION_MAJOR 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define VERSION_MINOR 36
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define _STR(s) #s
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define _DRIVER_VERSION(a, b) "v" _STR(a) "." _STR(b)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define DRIVER_VERSION _DRIVER_VERSION(VERSION_MAJOR, VERSION_MINOR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define DRIVER_AUTHOR "hermann kneissel"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define DRIVER_DESC "garmin gps driver"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) /* error codes returned by the driver */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define EINVPKT 1000 /* invalid packet structure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) /* size of the header of a packet using the usb protocol */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define GARMIN_PKTHDR_LENGTH 12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) /* max. possible size of a packet using the serial protocol */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define MAX_SERIAL_PKT_SIZ (3 + 255 + 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) /* max. possible size of a packet with worst case stuffing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define MAX_SERIAL_PKT_SIZ_STUFFED (MAX_SERIAL_PKT_SIZ + 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) /* size of a buffer able to hold a complete (no stuffing) packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * (the document protocol does not contain packets with a larger
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * size, but in theory a packet may be 64k+12 bytes - if in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * later protocol versions larger packet sizes occur, this value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * should be increased accordingly, so the input buffer is always
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * large enough the store a complete packet inclusive header) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #define GPS_IN_BUFSIZ (GARMIN_PKTHDR_LENGTH+MAX_SERIAL_PKT_SIZ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /* size of a buffer able to hold a complete (incl. stuffing) packet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #define GPS_OUT_BUFSIZ (GARMIN_PKTHDR_LENGTH+MAX_SERIAL_PKT_SIZ_STUFFED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) /* where to place the packet id of a serial packet, so we can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * prepend the usb-packet header without the need to move the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * packets data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) #define GSP_INITIAL_OFFSET (GARMIN_PKTHDR_LENGTH-2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) /* max. size of incoming private packets (header+1 param) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) #define PRIVPKTSIZ (GARMIN_PKTHDR_LENGTH+4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) #define GARMIN_LAYERID_TRANSPORT 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #define GARMIN_LAYERID_APPL 20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) /* our own layer-id to use for some control mechanisms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) #define GARMIN_LAYERID_PRIVATE 0x01106E4B
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) #define GARMIN_PKTID_PVT_DATA 51
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) #define GARMIN_PKTID_L001_COMMAND_DATA 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) #define CMND_ABORT_TRANSFER 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) /* packet ids used in private layer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) #define PRIV_PKTID_SET_DEBUG 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) #define PRIV_PKTID_SET_MODE 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) #define PRIV_PKTID_INFO_REQ 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) #define PRIV_PKTID_INFO_RESP 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) #define PRIV_PKTID_RESET_REQ 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) #define PRIV_PKTID_SET_DEF_MODE 6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) #define ETX 0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) #define DLE 0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) #define ACK 0x06
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #define NAK 0x15
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) /* structure used to queue incoming packets */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) struct garmin_packet {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) int seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) /* the real size of the data array, always > 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) __u8 data[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) /* structure used to keep the current state of the driver */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) struct garmin_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) __u8 state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) __u16 flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) __u8 mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) __u8 count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) __u8 pkt_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) __u32 serial_num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct timer_list timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) struct usb_serial_port *port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) int seq_counter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) int insize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) int outsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) __u8 inbuffer [GPS_IN_BUFSIZ]; /* tty -> usb */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) __u8 outbuffer[GPS_OUT_BUFSIZ]; /* usb -> tty */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) __u8 privpkt[4*6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) spinlock_t lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) struct list_head pktlist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) struct usb_anchor write_urbs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) #define STATE_NEW 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) #define STATE_INITIAL_DELAY 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) #define STATE_TIMEOUT 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) #define STATE_SESSION_REQ1 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) #define STATE_SESSION_REQ2 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) #define STATE_ACTIVE 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) #define STATE_RESET 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) #define STATE_DISCONNECTED 9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) #define STATE_WAIT_TTY_ACK 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) #define STATE_GSP_WAIT_DATA 11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) #define MODE_NATIVE 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) #define MODE_GARMIN_SERIAL 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) /* Flags used in garmin_data.flags: */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) #define FLAGS_SESSION_REPLY_MASK 0x00C0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) #define FLAGS_SESSION_REPLY1_SEEN 0x0080
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) #define FLAGS_SESSION_REPLY2_SEEN 0x0040
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) #define FLAGS_BULK_IN_ACTIVE 0x0020
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) #define FLAGS_BULK_IN_RESTART 0x0010
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) #define FLAGS_THROTTLED 0x0008
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) #define APP_REQ_SEEN 0x0004
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) #define APP_RESP_SEEN 0x0002
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) #define CLEAR_HALT_REQUIRED 0x0001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) #define FLAGS_QUEUING 0x0100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) #define FLAGS_DROP_DATA 0x0800
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) #define FLAGS_GSP_SKIP 0x1000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) #define FLAGS_GSP_DLESEEN 0x2000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) /* function prototypes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) static int gsp_next_packet(struct garmin_data *garmin_data_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) static int garmin_write_bulk(struct usb_serial_port *port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) const unsigned char *buf, int count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) int dismiss_ack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /* some special packets to be send or received */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static unsigned char const GARMIN_START_SESSION_REQ[]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) = { 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) static unsigned char const GARMIN_START_SESSION_REPLY[]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) = { 0, 0, 0, 0, 6, 0, 0, 0, 4, 0, 0, 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) static unsigned char const GARMIN_BULK_IN_AVAIL_REPLY[]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) = { 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) static unsigned char const GARMIN_STOP_TRANSFER_REQ[]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) = { 20, 0, 0, 0, 10, 0, 0, 0, 2, 0, 0, 0, 0, 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static unsigned char const GARMIN_STOP_TRANSFER_REQ_V2[]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) = { 20, 0, 0, 0, 10, 0, 0, 0, 1, 0, 0, 0, 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) /* packets currently unused, left as documentation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) #if 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) static unsigned char const GARMIN_APP_LAYER_REPLY[]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) = { 0x14, 0, 0, 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) static unsigned char const GARMIN_START_PVT_REQ[]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) = { 20, 0, 0, 0, 10, 0, 0, 0, 2, 0, 0, 0, 49, 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) static unsigned char const GARMIN_STOP_PVT_REQ[]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) = { 20, 0, 0, 0, 10, 0, 0, 0, 2, 0, 0, 0, 50, 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) static unsigned char const PRIVATE_REQ[]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) = { 0x4B, 0x6E, 0x10, 0x01, 0xFF, 0, 0, 0, 0xFF, 0, 0, 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) static const struct usb_device_id id_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) /* the same device id seems to be used by all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) usb enabled GPS devices */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) { USB_DEVICE(GARMIN_VENDOR_ID, 3) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) { } /* Terminating entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) MODULE_DEVICE_TABLE(usb, id_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) static inline int getLayerId(const __u8 *usbPacket)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) return __le32_to_cpup((__le32 *)(usbPacket));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) static inline int getPacketId(const __u8 *usbPacket)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) return __le32_to_cpup((__le32 *)(usbPacket+4));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) static inline int getDataLength(const __u8 *usbPacket)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) return __le32_to_cpup((__le32 *)(usbPacket+8));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) * check if the usb-packet in buf contains an abort-transfer command.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) * (if yes, all queued data will be dropped)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) static inline int isAbortTrfCmnd(const unsigned char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) if (memcmp(buf, GARMIN_STOP_TRANSFER_REQ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) sizeof(GARMIN_STOP_TRANSFER_REQ)) == 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) memcmp(buf, GARMIN_STOP_TRANSFER_REQ_V2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) sizeof(GARMIN_STOP_TRANSFER_REQ_V2)) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) static void send_to_tty(struct usb_serial_port *port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) char *data, unsigned int actual_length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) if (actual_length) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) usb_serial_debug_data(&port->dev, __func__, actual_length, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) tty_insert_flip_string(&port->port, data, actual_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) tty_flip_buffer_push(&port->port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) /******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) * packet queue handling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) * queue a received (usb-)packet for later processing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) static int pkt_add(struct garmin_data *garmin_data_p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) unsigned char *data, unsigned int data_length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) int state = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) int result = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) struct garmin_packet *pkt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) /* process only packets containing data ... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) if (data_length) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) pkt = kmalloc(sizeof(struct garmin_packet)+data_length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) if (!pkt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) pkt->size = data_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) memcpy(pkt->data, data, data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) spin_lock_irqsave(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) garmin_data_p->flags |= FLAGS_QUEUING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) result = list_empty(&garmin_data_p->pktlist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) pkt->seq = garmin_data_p->seq_counter++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) list_add_tail(&pkt->list, &garmin_data_p->pktlist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) state = garmin_data_p->state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) spin_unlock_irqrestore(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) dev_dbg(&garmin_data_p->port->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) "%s - added: pkt: %d - %d bytes\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) pkt->seq, data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) /* in serial mode, if someone is waiting for data from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) the device, convert and send the next packet to tty. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) if (result && (state == STATE_GSP_WAIT_DATA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) gsp_next_packet(garmin_data_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) /* get the next pending packet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) static struct garmin_packet *pkt_pop(struct garmin_data *garmin_data_p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) struct garmin_packet *result = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) spin_lock_irqsave(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (!list_empty(&garmin_data_p->pktlist)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) result = (struct garmin_packet *)garmin_data_p->pktlist.next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) list_del(&result->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) spin_unlock_irqrestore(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) /* free up all queued data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) static void pkt_clear(struct garmin_data *garmin_data_p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) struct garmin_packet *result = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) spin_lock_irqsave(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) while (!list_empty(&garmin_data_p->pktlist)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) result = (struct garmin_packet *)garmin_data_p->pktlist.next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) list_del(&result->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) kfree(result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) spin_unlock_irqrestore(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) /******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) * garmin serial protocol handling handling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) /* send an ack packet back to the tty */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) static int gsp_send_ack(struct garmin_data *garmin_data_p, __u8 pkt_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) __u8 pkt[10];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) __u8 cksum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) __u8 *ptr = pkt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) unsigned l = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) dev_dbg(&garmin_data_p->port->dev, "%s - pkt-id: 0x%X.\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) pkt_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) *ptr++ = DLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) *ptr++ = ACK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) cksum += ACK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) *ptr++ = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) cksum += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) *ptr++ = pkt_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) cksum += pkt_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) if (pkt_id == DLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) *ptr++ = DLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) *ptr++ = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) *ptr++ = (-cksum) & 0xFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) *ptr++ = DLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) *ptr++ = ETX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) l = ptr-pkt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) send_to_tty(garmin_data_p->port, pkt, l);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) * called for a complete packet received from tty layer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) * the complete packet (pktid ... cksum) is in garmin_data_p->inbuf starting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) * at GSP_INITIAL_OFFSET.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) * count - number of bytes in the input buffer including space reserved for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) * the usb header: GSP_INITIAL_OFFSET + number of bytes in packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) * (including pkt-id, data-length a. cksum)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) static int gsp_rec_packet(struct garmin_data *garmin_data_p, int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) struct device *dev = &garmin_data_p->port->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) const __u8 *recpkt = garmin_data_p->inbuffer+GSP_INITIAL_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) __le32 *usbdata = (__le32 *) garmin_data_p->inbuffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) int cksum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) int n = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) int pktid = recpkt[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) int size = recpkt[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) usb_serial_debug_data(&garmin_data_p->port->dev, __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) count-GSP_INITIAL_OFFSET, recpkt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) if (size != (count-GSP_INITIAL_OFFSET-3)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) dev_dbg(dev, "%s - invalid size, expected %d bytes, got %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) __func__, size, (count-GSP_INITIAL_OFFSET-3));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) return -EINVPKT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) cksum += *recpkt++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) cksum += *recpkt++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) /* sanity check, remove after test ... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) if ((__u8 *)&(usbdata[3]) != recpkt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) dev_dbg(dev, "%s - ptr mismatch %p - %p\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) &(usbdata[4]), recpkt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) return -EINVPKT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) while (n < size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) cksum += *recpkt++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) n++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (((cksum + *recpkt) & 0xff) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) dev_dbg(dev, "%s - invalid checksum, expected %02x, got %02x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) __func__, -cksum & 0xff, *recpkt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) return -EINVPKT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) usbdata[0] = __cpu_to_le32(GARMIN_LAYERID_APPL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) usbdata[1] = __cpu_to_le32(pktid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) usbdata[2] = __cpu_to_le32(size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) garmin_write_bulk(garmin_data_p->port, garmin_data_p->inbuffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) GARMIN_PKTHDR_LENGTH+size, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) /* if this was an abort-transfer command, flush all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) queued data. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) if (isAbortTrfCmnd(garmin_data_p->inbuffer)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) spin_lock_irqsave(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) garmin_data_p->flags |= FLAGS_DROP_DATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) spin_unlock_irqrestore(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) pkt_clear(garmin_data_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) * Called for data received from tty
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) * buf contains the data read, it may span more than one packet or even
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) * incomplete packets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) * input record should be a serial-record, but it may not be complete.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) * Copy it into our local buffer, until an etx is seen (or an error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) * occurs).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) * Once the record is complete, convert into a usb packet and send it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) * to the bulk pipe, send an ack back to the tty.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) * If the input is an ack, just send the last queued packet to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) * tty layer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) * if the input is an abort command, drop all queued data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) static int gsp_receive(struct garmin_data *garmin_data_p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) const unsigned char *buf, int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) struct device *dev = &garmin_data_p->port->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) int offs = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) int ack_or_nak_seen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) __u8 *dest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) /* dleSeen: set if last byte read was a DLE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) int dleSeen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) /* skip: if set, skip incoming data until possible start of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) * new packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) int skip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) __u8 data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) spin_lock_irqsave(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) dest = garmin_data_p->inbuffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) size = garmin_data_p->insize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) dleSeen = garmin_data_p->flags & FLAGS_GSP_DLESEEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) skip = garmin_data_p->flags & FLAGS_GSP_SKIP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) spin_unlock_irqrestore(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) /* dev_dbg(dev, "%s - dle=%d skip=%d size=%d count=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) __func__, dleSeen, skip, size, count); */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) if (size == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) size = GSP_INITIAL_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) while (offs < count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) data = *(buf+offs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) offs++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) if (data == DLE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) if (skip) { /* start of a new pkt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) skip = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) size = GSP_INITIAL_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) dleSeen = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) } else if (dleSeen) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) dest[size++] = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) dleSeen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) dleSeen = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) } else if (data == ETX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) if (dleSeen) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) /* packet complete */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) data = dest[GSP_INITIAL_OFFSET];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) if (data == ACK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) ack_or_nak_seen = ACK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) dev_dbg(dev, "ACK packet complete.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) } else if (data == NAK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) ack_or_nak_seen = NAK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) dev_dbg(dev, "NAK packet complete.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) dev_dbg(dev, "packet complete - id=0x%X.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) gsp_rec_packet(garmin_data_p, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) skip = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) size = GSP_INITIAL_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) dleSeen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) dest[size++] = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) } else if (!skip) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) if (dleSeen) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) size = GSP_INITIAL_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) dleSeen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) dest[size++] = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) if (size >= GPS_IN_BUFSIZ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) dev_dbg(dev, "%s - packet too large.\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) skip = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) size = GSP_INITIAL_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) dleSeen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) spin_lock_irqsave(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) garmin_data_p->insize = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) /* copy flags back to structure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) if (skip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) garmin_data_p->flags |= FLAGS_GSP_SKIP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) garmin_data_p->flags &= ~FLAGS_GSP_SKIP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) if (dleSeen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) garmin_data_p->flags |= FLAGS_GSP_DLESEEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) garmin_data_p->flags &= ~FLAGS_GSP_DLESEEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) spin_unlock_irqrestore(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) if (ack_or_nak_seen) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) if (gsp_next_packet(garmin_data_p) > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) garmin_data_p->state = STATE_ACTIVE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) garmin_data_p->state = STATE_GSP_WAIT_DATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) * Sends a usb packet to the tty
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) * Assumes, that all packages and at an usb-packet boundary.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) * return <0 on error, 0 if packet is incomplete or > 0 if packet was sent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) static int gsp_send(struct garmin_data *garmin_data_p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) const unsigned char *buf, int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) struct device *dev = &garmin_data_p->port->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) const unsigned char *src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) unsigned char *dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) int pktid = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) int datalen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) int cksum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) int i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) int k;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) dev_dbg(dev, "%s - state %d - %d bytes.\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) garmin_data_p->state, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) k = garmin_data_p->outsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) if ((k+count) > GPS_OUT_BUFSIZ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) dev_dbg(dev, "packet too large\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) garmin_data_p->outsize = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) return -4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) memcpy(garmin_data_p->outbuffer+k, buf, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) k += count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) garmin_data_p->outsize = k;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) if (k >= GARMIN_PKTHDR_LENGTH) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) pktid = getPacketId(garmin_data_p->outbuffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) datalen = getDataLength(garmin_data_p->outbuffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) i = GARMIN_PKTHDR_LENGTH + datalen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) if (k < i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) dev_dbg(dev, "%s - %d bytes in buffer, %d bytes in pkt.\n", __func__, k, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) /* garmin_data_p->outbuffer now contains a complete packet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) usb_serial_debug_data(&garmin_data_p->port->dev, __func__, k,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) garmin_data_p->outbuffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) garmin_data_p->outsize = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) if (getLayerId(garmin_data_p->outbuffer) != GARMIN_LAYERID_APPL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) dev_dbg(dev, "not an application packet (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) getLayerId(garmin_data_p->outbuffer));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) if (pktid > 255) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) dev_dbg(dev, "packet-id %d too large\n", pktid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) return -2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) if (datalen > 255) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) dev_dbg(dev, "packet-size %d too large\n", datalen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) return -3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) /* the serial protocol should be able to handle this packet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) k = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) src = garmin_data_p->outbuffer+GARMIN_PKTHDR_LENGTH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) for (i = 0; i < datalen; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) if (*src++ == DLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) k++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) src = garmin_data_p->outbuffer+GARMIN_PKTHDR_LENGTH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) if (k > (GARMIN_PKTHDR_LENGTH-2)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) /* can't add stuffing DLEs in place, move data to end
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) of buffer ... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) dst = garmin_data_p->outbuffer+GPS_OUT_BUFSIZ-datalen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) memcpy(dst, src, datalen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) src = dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) dst = garmin_data_p->outbuffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) *dst++ = DLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) *dst++ = pktid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) cksum += pktid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) *dst++ = datalen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) cksum += datalen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) if (datalen == DLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) *dst++ = DLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) for (i = 0; i < datalen; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) __u8 c = *src++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) *dst++ = c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) cksum += c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) if (c == DLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) *dst++ = DLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) cksum = -cksum & 0xFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) *dst++ = cksum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) if (cksum == DLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) *dst++ = DLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) *dst++ = DLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) *dst++ = ETX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) i = dst-garmin_data_p->outbuffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) send_to_tty(garmin_data_p->port, garmin_data_p->outbuffer, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) garmin_data_p->pkt_id = pktid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) garmin_data_p->state = STATE_WAIT_TTY_ACK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) return i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) * Process the next pending data packet - if there is one
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) static int gsp_next_packet(struct garmin_data *garmin_data_p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) int result = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) struct garmin_packet *pkt = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) while ((pkt = pkt_pop(garmin_data_p)) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) dev_dbg(&garmin_data_p->port->dev, "%s - next pkt: %d\n", __func__, pkt->seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) result = gsp_send(garmin_data_p, pkt->data, pkt->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) if (result > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) kfree(pkt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) kfree(pkt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) /******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) * garmin native mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) * Called for data received from tty
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) * The input data is expected to be in garmin usb-packet format.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) * buf contains the data read, it may span more than one packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) * or even incomplete packets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) static int nat_receive(struct garmin_data *garmin_data_p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) const unsigned char *buf, int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) __u8 *dest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) int offs = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) int result = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) while (offs < count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) /* if buffer contains header, copy rest of data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) if (garmin_data_p->insize >= GARMIN_PKTHDR_LENGTH)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) len = GARMIN_PKTHDR_LENGTH
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) +getDataLength(garmin_data_p->inbuffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) len = GARMIN_PKTHDR_LENGTH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) if (len >= GPS_IN_BUFSIZ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) /* seems to be an invalid packet, ignore rest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) of input */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) dev_dbg(&garmin_data_p->port->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) "%s - packet size too large: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) __func__, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) garmin_data_p->insize = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) result = -EINVPKT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) len -= garmin_data_p->insize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) if (len > (count-offs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) len = (count-offs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) if (len > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) dest = garmin_data_p->inbuffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) + garmin_data_p->insize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) memcpy(dest, buf+offs, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) garmin_data_p->insize += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) offs += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) /* do we have a complete packet ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) if (garmin_data_p->insize >= GARMIN_PKTHDR_LENGTH) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) len = GARMIN_PKTHDR_LENGTH+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) getDataLength(garmin_data_p->inbuffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) if (garmin_data_p->insize >= len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) garmin_write_bulk(garmin_data_p->port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) garmin_data_p->inbuffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) len, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) garmin_data_p->insize = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) /* if this was an abort-transfer command,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) flush all queued data. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) if (isAbortTrfCmnd(garmin_data_p->inbuffer)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) spin_lock_irqsave(&garmin_data_p->lock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) garmin_data_p->flags |= FLAGS_DROP_DATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) spin_unlock_irqrestore(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) &garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) pkt_clear(garmin_data_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) /******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) * private packets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) static void priv_status_resp(struct usb_serial_port *port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) struct garmin_data *garmin_data_p = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) __le32 *pkt = (__le32 *)garmin_data_p->privpkt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) pkt[0] = __cpu_to_le32(GARMIN_LAYERID_PRIVATE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) pkt[1] = __cpu_to_le32(PRIV_PKTID_INFO_RESP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) pkt[2] = __cpu_to_le32(12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) pkt[3] = __cpu_to_le32(VERSION_MAJOR << 16 | VERSION_MINOR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) pkt[4] = __cpu_to_le32(garmin_data_p->mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) pkt[5] = __cpu_to_le32(garmin_data_p->serial_num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) send_to_tty(port, (__u8 *)pkt, 6 * 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) /******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) * Garmin specific driver functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) static int process_resetdev_request(struct usb_serial_port *port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) struct garmin_data *garmin_data_p = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) spin_lock_irqsave(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) garmin_data_p->flags &= ~(CLEAR_HALT_REQUIRED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) garmin_data_p->state = STATE_RESET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) garmin_data_p->serial_num = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) spin_unlock_irqrestore(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) usb_kill_urb(port->interrupt_in_urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) dev_dbg(&port->dev, "%s - usb_reset_device\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) status = usb_reset_device(port->serial->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) if (status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) dev_dbg(&port->dev, "%s - usb_reset_device failed: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) __func__, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) * clear all cached data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) static int garmin_clear(struct garmin_data *garmin_data_p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) /* flush all queued data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) pkt_clear(garmin_data_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) spin_lock_irqsave(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) garmin_data_p->insize = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) garmin_data_p->outsize = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) spin_unlock_irqrestore(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) static int garmin_init_session(struct usb_serial_port *port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) struct garmin_data *garmin_data_p = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) usb_kill_urb(port->interrupt_in_urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) status = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) if (status) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) dev_err(&port->dev, "failed to submit interrupt urb: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) * using the initialization method from gpsbabel. See comments in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) * gpsbabel/jeeps/gpslibusb.c gusb_reset_toggles()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) dev_dbg(&port->dev, "%s - starting session ...\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) garmin_data_p->state = STATE_ACTIVE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) for (i = 0; i < 3; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) status = garmin_write_bulk(port, GARMIN_START_SESSION_REQ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) sizeof(GARMIN_START_SESSION_REQ), 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) if (status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) goto err_kill_urbs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) err_kill_urbs:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) usb_kill_anchored_urbs(&garmin_data_p->write_urbs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) usb_kill_urb(port->interrupt_in_urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) static int garmin_open(struct tty_struct *tty, struct usb_serial_port *port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) int status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) struct garmin_data *garmin_data_p = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) spin_lock_irqsave(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) garmin_data_p->mode = initial_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) garmin_data_p->count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) garmin_data_p->flags &= FLAGS_SESSION_REPLY1_SEEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) spin_unlock_irqrestore(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) /* shutdown any bulk reads that might be going on */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) usb_kill_urb(port->read_urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) if (garmin_data_p->state == STATE_RESET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) status = garmin_init_session(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) garmin_data_p->state = STATE_ACTIVE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) static void garmin_close(struct usb_serial_port *port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) struct garmin_data *garmin_data_p = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) dev_dbg(&port->dev, "%s - mode=%d state=%d flags=0x%X\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) __func__, garmin_data_p->mode, garmin_data_p->state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) garmin_data_p->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) garmin_clear(garmin_data_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) /* shutdown our urbs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) usb_kill_urb(port->read_urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) usb_kill_anchored_urbs(&garmin_data_p->write_urbs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) /* keep reset state so we know that we must start a new session */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) if (garmin_data_p->state != STATE_RESET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) garmin_data_p->state = STATE_DISCONNECTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) static void garmin_write_bulk_callback(struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) struct usb_serial_port *port = urb->context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) if (port) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) struct garmin_data *garmin_data_p =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) if (getLayerId(urb->transfer_buffer) == GARMIN_LAYERID_APPL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) if (garmin_data_p->mode == MODE_GARMIN_SERIAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) gsp_send_ack(garmin_data_p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) ((__u8 *)urb->transfer_buffer)[4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) usb_serial_port_softint(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) /* Ignore errors that resulted from garmin_write_bulk with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) dismiss_ack = 1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) /* free up the transfer buffer, as usb_free_urb() does not do this */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) kfree(urb->transfer_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) static int garmin_write_bulk(struct usb_serial_port *port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) const unsigned char *buf, int count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) int dismiss_ack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) struct usb_serial *serial = port->serial;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) struct garmin_data *garmin_data_p = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) struct urb *urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) unsigned char *buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) spin_lock_irqsave(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) garmin_data_p->flags &= ~FLAGS_DROP_DATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) spin_unlock_irqrestore(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) buffer = kmalloc(count, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) if (!buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) urb = usb_alloc_urb(0, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) if (!urb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) kfree(buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) memcpy(buffer, buf, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) usb_serial_debug_data(&port->dev, __func__, count, buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) usb_fill_bulk_urb(urb, serial->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) usb_sndbulkpipe(serial->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) port->bulk_out_endpointAddress),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) buffer, count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) garmin_write_bulk_callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) dismiss_ack ? NULL : port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) urb->transfer_flags |= URB_ZERO_PACKET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) if (getLayerId(buffer) == GARMIN_LAYERID_APPL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) spin_lock_irqsave(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) garmin_data_p->flags |= APP_REQ_SEEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) spin_unlock_irqrestore(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) if (garmin_data_p->mode == MODE_GARMIN_SERIAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) pkt_clear(garmin_data_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) garmin_data_p->state = STATE_GSP_WAIT_DATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) /* send it down the pipe */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) usb_anchor_urb(urb, &garmin_data_p->write_urbs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) status = usb_submit_urb(urb, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) if (status) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) dev_err(&port->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) "%s - usb_submit_urb(write bulk) failed with status = %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) __func__, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) count = status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) usb_unanchor_urb(urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) kfree(buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) /* we are done with this urb, so let the host driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) * really free it when it is finished with it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) usb_free_urb(urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) static int garmin_write(struct tty_struct *tty, struct usb_serial_port *port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) const unsigned char *buf, int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) struct device *dev = &port->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) int pktid, pktsiz, len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) struct garmin_data *garmin_data_p = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) __le32 *privpkt = (__le32 *)garmin_data_p->privpkt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) usb_serial_debug_data(dev, __func__, count, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) if (garmin_data_p->state == STATE_RESET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) /* check for our private packets */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) if (count >= GARMIN_PKTHDR_LENGTH) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) len = PRIVPKTSIZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) if (count < len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) len = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) memcpy(garmin_data_p->privpkt, buf, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) pktsiz = getDataLength(garmin_data_p->privpkt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) pktid = getPacketId(garmin_data_p->privpkt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) if (count == (GARMIN_PKTHDR_LENGTH + pktsiz) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) getLayerId(garmin_data_p->privpkt) ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) GARMIN_LAYERID_PRIVATE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) dev_dbg(dev, "%s - processing private request %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) __func__, pktid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) /* drop all unfinished transfers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) garmin_clear(garmin_data_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) switch (pktid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) case PRIV_PKTID_SET_MODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) if (pktsiz != 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) return -EINVPKT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) garmin_data_p->mode = __le32_to_cpu(privpkt[3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) dev_dbg(dev, "%s - mode set to %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) __func__, garmin_data_p->mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) case PRIV_PKTID_INFO_REQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) priv_status_resp(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) case PRIV_PKTID_RESET_REQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) process_resetdev_request(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) case PRIV_PKTID_SET_DEF_MODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) if (pktsiz != 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) return -EINVPKT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) initial_mode = __le32_to_cpu(privpkt[3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) dev_dbg(dev, "%s - initial_mode set to %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) garmin_data_p->mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) if (garmin_data_p->mode == MODE_GARMIN_SERIAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) return gsp_receive(garmin_data_p, buf, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) } else { /* MODE_NATIVE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) return nat_receive(garmin_data_p, buf, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) static int garmin_write_room(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) struct usb_serial_port *port = tty->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) * Report back the bytes currently available in the output buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) struct garmin_data *garmin_data_p = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) return GPS_OUT_BUFSIZ-garmin_data_p->outsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) static void garmin_read_process(struct garmin_data *garmin_data_p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) unsigned char *data, unsigned data_length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) int bulk_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) if (garmin_data_p->flags & FLAGS_DROP_DATA) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) /* abort-transfer cmd is active */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) dev_dbg(&garmin_data_p->port->dev, "%s - pkt dropped\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) } else if (garmin_data_p->state != STATE_DISCONNECTED &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) garmin_data_p->state != STATE_RESET) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) /* if throttling is active or postprecessing is required
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) put the received data in the input queue, otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) send it directly to the tty port */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) if (garmin_data_p->flags & FLAGS_QUEUING) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) pkt_add(garmin_data_p, data, data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) } else if (bulk_data || (data_length >= sizeof(u32) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) getLayerId(data) == GARMIN_LAYERID_APPL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) spin_lock_irqsave(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) garmin_data_p->flags |= APP_RESP_SEEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) spin_unlock_irqrestore(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) if (garmin_data_p->mode == MODE_GARMIN_SERIAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) pkt_add(garmin_data_p, data, data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) send_to_tty(garmin_data_p->port, data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) /* ignore system layer packets ... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) static void garmin_read_bulk_callback(struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) struct usb_serial_port *port = urb->context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) struct garmin_data *garmin_data_p = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) unsigned char *data = urb->transfer_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) int status = urb->status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) if (status) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) __func__, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) garmin_read_process(garmin_data_p, data, urb->actual_length, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) if (urb->actual_length == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) (garmin_data_p->flags & FLAGS_BULK_IN_RESTART) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) spin_lock_irqsave(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) garmin_data_p->flags &= ~FLAGS_BULK_IN_RESTART;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) spin_unlock_irqrestore(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) retval = usb_submit_urb(port->read_urb, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) dev_err(&port->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) "%s - failed resubmitting read urb, error %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) __func__, retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) } else if (urb->actual_length > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) /* Continue trying to read until nothing more is received */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) if ((garmin_data_p->flags & FLAGS_THROTTLED) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) retval = usb_submit_urb(port->read_urb, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) dev_err(&port->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) "%s - failed resubmitting read urb, error %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) __func__, retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) dev_dbg(&port->dev, "%s - end of bulk data\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) spin_lock_irqsave(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) garmin_data_p->flags &= ~FLAGS_BULK_IN_ACTIVE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) spin_unlock_irqrestore(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) static void garmin_read_int_callback(struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) struct usb_serial_port *port = urb->context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) struct garmin_data *garmin_data_p = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) unsigned char *data = urb->transfer_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) int status = urb->status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) switch (status) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) /* success */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) case -ECONNRESET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) case -ENOENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) case -ESHUTDOWN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) /* this urb is terminated, clean up */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) __func__, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) __func__, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) usb_serial_debug_data(&port->dev, __func__, urb->actual_length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) urb->transfer_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) if (urb->actual_length == sizeof(GARMIN_BULK_IN_AVAIL_REPLY) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) memcmp(data, GARMIN_BULK_IN_AVAIL_REPLY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) sizeof(GARMIN_BULK_IN_AVAIL_REPLY)) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) dev_dbg(&port->dev, "%s - bulk data available.\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) if ((garmin_data_p->flags & FLAGS_BULK_IN_ACTIVE) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) /* bulk data available */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) retval = usb_submit_urb(port->read_urb, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) if (retval) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) dev_err(&port->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) "%s - failed submitting read urb, error %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) __func__, retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) spin_lock_irqsave(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) garmin_data_p->flags |= FLAGS_BULK_IN_ACTIVE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) spin_unlock_irqrestore(&garmin_data_p->lock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) /* bulk-in transfer still active */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) spin_lock_irqsave(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) garmin_data_p->flags |= FLAGS_BULK_IN_RESTART;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) spin_unlock_irqrestore(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) } else if (urb->actual_length == (4+sizeof(GARMIN_START_SESSION_REPLY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) && memcmp(data, GARMIN_START_SESSION_REPLY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) sizeof(GARMIN_START_SESSION_REPLY)) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) spin_lock_irqsave(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) garmin_data_p->flags |= FLAGS_SESSION_REPLY1_SEEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) spin_unlock_irqrestore(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) /* save the serial number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) garmin_data_p->serial_num = __le32_to_cpup(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) (__le32 *)(data+GARMIN_PKTHDR_LENGTH));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) dev_dbg(&port->dev, "%s - start-of-session reply seen - serial %u.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) __func__, garmin_data_p->serial_num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) garmin_read_process(garmin_data_p, data, urb->actual_length, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) retval = usb_submit_urb(urb, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) dev_err(&urb->dev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) "%s - Error %d submitting interrupt urb\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) __func__, retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) * Sends the next queued packt to the tty port (garmin native mode only)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) * and then sets a timer to call itself again until all queued data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) * is sent.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) static int garmin_flush_queue(struct garmin_data *garmin_data_p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) struct garmin_packet *pkt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) if ((garmin_data_p->flags & FLAGS_THROTTLED) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) pkt = pkt_pop(garmin_data_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) if (pkt != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) send_to_tty(garmin_data_p->port, pkt->data, pkt->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) kfree(pkt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) mod_timer(&garmin_data_p->timer, (1)+jiffies);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) spin_lock_irqsave(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) garmin_data_p->flags &= ~FLAGS_QUEUING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) spin_unlock_irqrestore(&garmin_data_p->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) static void garmin_throttle(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) struct usb_serial_port *port = tty->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) struct garmin_data *garmin_data_p = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) /* set flag, data received will be put into a queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) for later processing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) spin_lock_irq(&garmin_data_p->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) garmin_data_p->flags |= FLAGS_QUEUING|FLAGS_THROTTLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) spin_unlock_irq(&garmin_data_p->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) static void garmin_unthrottle(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) struct usb_serial_port *port = tty->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) struct garmin_data *garmin_data_p = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) spin_lock_irq(&garmin_data_p->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) garmin_data_p->flags &= ~FLAGS_THROTTLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) spin_unlock_irq(&garmin_data_p->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) /* in native mode send queued data to tty, in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) serial mode nothing needs to be done here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) if (garmin_data_p->mode == MODE_NATIVE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) garmin_flush_queue(garmin_data_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) if ((garmin_data_p->flags & FLAGS_BULK_IN_ACTIVE) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) status = usb_submit_urb(port->read_urb, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) if (status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) dev_err(&port->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) "%s - failed resubmitting read urb, error %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) __func__, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) * The timer is currently only used to send queued packets to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) * the tty in cases where the protocol provides no own handshaking
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) * to initiate the transfer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) static void timeout_handler(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) struct garmin_data *garmin_data_p = from_timer(garmin_data_p, t, timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) /* send the next queued packet to the tty port */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) if (garmin_data_p->mode == MODE_NATIVE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) if (garmin_data_p->flags & FLAGS_QUEUING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) garmin_flush_queue(garmin_data_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) static int garmin_port_probe(struct usb_serial_port *port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) struct garmin_data *garmin_data_p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) garmin_data_p = kzalloc(sizeof(struct garmin_data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) if (!garmin_data_p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) timer_setup(&garmin_data_p->timer, timeout_handler, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) spin_lock_init(&garmin_data_p->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) INIT_LIST_HEAD(&garmin_data_p->pktlist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) garmin_data_p->port = port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) garmin_data_p->state = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) garmin_data_p->flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) garmin_data_p->count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) init_usb_anchor(&garmin_data_p->write_urbs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) usb_set_serial_port_data(port, garmin_data_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) status = garmin_init_session(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) if (status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) goto err_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) err_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) kfree(garmin_data_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) static int garmin_port_remove(struct usb_serial_port *port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) struct garmin_data *garmin_data_p = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) usb_kill_anchored_urbs(&garmin_data_p->write_urbs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) usb_kill_urb(port->interrupt_in_urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410) del_timer_sync(&garmin_data_p->timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) kfree(garmin_data_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) /* All of the device info needed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) static struct usb_serial_driver garmin_device = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) .name = "garmin_gps",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) .description = "Garmin GPS usb/tty",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) .id_table = id_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) .num_ports = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) .open = garmin_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) .close = garmin_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) .throttle = garmin_throttle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) .unthrottle = garmin_unthrottle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) .port_probe = garmin_port_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) .port_remove = garmin_port_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) .write = garmin_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) .write_room = garmin_write_room,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) .write_bulk_callback = garmin_write_bulk_callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) .read_bulk_callback = garmin_read_bulk_callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) .read_int_callback = garmin_read_int_callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) static struct usb_serial_driver * const serial_drivers[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) &garmin_device, NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) module_usb_serial_driver(serial_drivers, id_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) MODULE_AUTHOR(DRIVER_AUTHOR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) MODULE_DESCRIPTION(DRIVER_DESC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) module_param(initial_mode, int, S_IRUGO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) MODULE_PARM_DESC(initial_mode, "Initial mode");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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