1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 #ifndef _LINUX_GSMMUX_H 3 #define _LINUX_GSMMUX_H 4 5 #include <linux/const.h> 6 #include <linux/if.h> 7 #include <linux/ioctl.h> 8 #include <linux/types.h> 9 10 /* 11 * flags definition for n_gsm 12 * 13 * Used by: 14 * struct gsm_config_ext.flags 15 * struct gsm_dlci_config.flags 16 */ 17 /* Forces a DLCI reset if set. Otherwise, a DLCI reset is only done if 18 * incompatible settings were provided. Always cleared on retrieval. 19 */ 20 #define GSM_FL_RESTART _BITUL(0) 21 22 /** 23 * struct gsm_config - n_gsm basic configuration parameters 24 * 25 * This structure is used in combination with GSMIOC_GETCONF and GSMIOC_SETCONF 26 * to retrieve and set the basic parameters of an n_gsm ldisc. 27 * struct gsm_config_ext can be used to configure extended ldisc parameters. 28 * 29 * All timers are in units of 1/100th of a second. 30 * 31 * @adaption: Convergence layer type 32 * @encapsulation: Framing (0 = basic option, 1 = advanced option) 33 * @initiator: Initiator or responder 34 * @t1: Acknowledgment timer 35 * @t2: Response timer for multiplexer control channel 36 * @t3: Response timer for wake-up procedure 37 * @n2: Maximum number of retransmissions 38 * @mru: Maximum incoming frame payload size 39 * @mtu: Maximum outgoing frame payload size 40 * @k: Window size 41 * @i: Frame type (1 = UIH, 2 = UI) 42 * @unused: Can not be used 43 */ 44 struct gsm_config 45 { 46 unsigned int adaption; 47 unsigned int encapsulation; 48 unsigned int initiator; 49 unsigned int t1; 50 unsigned int t2; 51 unsigned int t3; 52 unsigned int n2; 53 unsigned int mru; 54 unsigned int mtu; 55 unsigned int k; 56 unsigned int i; 57 unsigned int unused[8]; 58 }; 59 60 #define GSMIOC_GETCONF _IOR('G', 0, struct gsm_config) 61 #define GSMIOC_SETCONF _IOW('G', 1, struct gsm_config) 62 63 /** 64 * struct gsm_netconfig - n_gsm network configuration parameters 65 * 66 * This structure is used in combination with GSMIOC_ENABLE_NET and 67 * GSMIOC_DISABLE_NET to enable or disable a network data connection 68 * over a mux virtual tty channel. This is for modems that support 69 * data connections with raw IP frames instead of PPP. 70 * 71 * @adaption: Adaption to use in network mode. 72 * @protocol: Protocol to use - only ETH_P_IP supported. 73 * @unused2: Can not be used. 74 * @if_name: Interface name format string. 75 * @unused: Can not be used. 76 */ 77 struct gsm_netconfig { 78 unsigned int adaption; 79 unsigned short protocol; 80 unsigned short unused2; 81 char if_name[IFNAMSIZ]; 82 __u8 unused[28]; 83 }; 84 85 #define GSMIOC_ENABLE_NET _IOW('G', 2, struct gsm_netconfig) 86 #define GSMIOC_DISABLE_NET _IO('G', 3) 87 88 /* get the base tty number for a configured gsmmux tty */ 89 #define GSMIOC_GETFIRST _IOR('G', 4, __u32) 90 91 /** 92 * struct gsm_config_ext - n_gsm extended configuration parameters 93 * 94 * This structure is used in combination with GSMIOC_GETCONF_EXT and 95 * GSMIOC_SETCONF_EXT to retrieve and set the extended parameters of an 96 * n_gsm ldisc. 97 * 98 * All timers are in units of 1/100th of a second. 99 * 100 * @keep_alive: Control channel keep-alive in 1/100th of a second (0 to disable). 101 * @wait_config: Wait for DLCI config before opening virtual link? 102 * @flags: Mux specific flags. 103 * @reserved: For future use, must be initialized to zero. 104 */ 105 struct gsm_config_ext { 106 __u32 keep_alive; 107 __u32 wait_config; 108 __u32 flags; 109 __u32 reserved[5]; 110 }; 111 112 #define GSMIOC_GETCONF_EXT _IOR('G', 5, struct gsm_config_ext) 113 #define GSMIOC_SETCONF_EXT _IOW('G', 6, struct gsm_config_ext) 114 115 /** 116 * struct gsm_dlci_config - n_gsm channel configuration parameters 117 * 118 * This structure is used in combination with GSMIOC_GETCONF_DLCI and 119 * GSMIOC_SETCONF_DLCI to retrieve and set the channel specific parameters 120 * of an n_gsm ldisc. 121 * 122 * Set the channel accordingly before calling GSMIOC_GETCONF_DLCI. 123 * 124 * @channel: DLCI (0 for the associated DLCI). 125 * @adaption: Convergence layer type. 126 * @mtu: Maximum transfer unit. 127 * @priority: Priority (0 for default value). 128 * @i: Frame type (1 = UIH, 2 = UI). 129 * @k: Window size (0 for default value). 130 * @flags: DLCI specific flags. 131 * @reserved: For future use, must be initialized to zero. 132 */ 133 struct gsm_dlci_config { 134 __u32 channel; 135 __u32 adaption; 136 __u32 mtu; 137 __u32 priority; 138 __u32 i; 139 __u32 k; 140 __u32 flags; 141 __u32 reserved[7]; 142 }; 143 144 #define GSMIOC_GETCONF_DLCI _IOWR('G', 7, struct gsm_dlci_config) 145 #define GSMIOC_SETCONF_DLCI _IOW('G', 8, struct gsm_dlci_config) 146 147 #endif 148