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![Joe Millenbach](/assets/img/avatar_default.png)
The option allows you to remove TTY and compile without errors. This saves space on systems that won't support TTY interfaces anyway. bloat-o-meter output is below. The bulk of this patch consists of Kconfig changes adding "depends on TTY" to various serial devices and similar drivers that require the TTY layer. Ideally, these dependencies would occur on a common intermediate symbol such as SERIO, but most drivers "select SERIO" rather than "depends on SERIO", and "select" does not respect dependencies. bloat-o-meter output comparing our previous minimal to new minimal by removing TTY. The list is filtered to not show removed entries with awk '$3 != "-"' as the list was very long. add/remove: 0/226 grow/shrink: 2/14 up/down: 6/-35356 (-35350) function old new delta chr_dev_init 166 170 +4 allow_signal 80 82 +2 static.__warned 143 142 -1 disallow_signal 63 62 -1 __set_special_pids 95 94 -1 unregister_console 126 121 -5 start_kernel 546 541 -5 register_console 593 588 -5 copy_from_user 45 40 -5 sys_setsid 128 120 -8 sys_vhangup 32 19 -13 do_exit 1543 1526 -17 bitmap_zero 60 40 -20 arch_local_irq_save 137 117 -20 release_task 674 652 -22 static.spin_unlock_irqrestore 308 260 -48 Signed-off-by: Joe Millenbach <jmillenbach@gmail.com> Reviewed-by: Jamey Sharp <jamey@minilop.net> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
193 lines
7.8 KiB
Text
193 lines
7.8 KiB
Text
config MKISS
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tristate "Serial port KISS driver"
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depends on AX25 && TTY
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select CRC16
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---help---
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KISS is a protocol used for the exchange of data between a computer
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and a Terminal Node Controller (a small embedded system commonly
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used for networking over AX.25 amateur radio connections; it
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connects the computer's serial port with the radio's microphone
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input and speaker output).
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Although KISS is less advanced than the 6pack protocol, it has
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the advantage that it is already supported by most modern TNCs
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without the need for a firmware upgrade.
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To compile this driver as a module, choose M here: the module
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will be called mkiss.
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config 6PACK
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tristate "Serial port 6PACK driver"
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depends on AX25 && TTY
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---help---
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6pack is a transmission protocol for the data exchange between your
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PC and your TNC (the Terminal Node Controller acts as a kind of
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modem connecting your computer's serial port to your radio's
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microphone input and speaker output). This protocol can be used as
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an alternative to KISS for networking over AX.25 amateur radio
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connections, but it has some extended functionality.
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Note that this driver is still experimental and might cause
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problems. For details about the features and the usage of the
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driver, read <file:Documentation/networking/6pack.txt>.
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To compile this driver as a module, choose M here: the module
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will be called 6pack.
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config BPQETHER
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tristate "BPQ Ethernet driver"
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depends on AX25
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help
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AX.25 is the protocol used for computer communication over amateur
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radio. If you say Y here, you will be able to send and receive AX.25
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traffic over Ethernet (also called "BPQ AX.25"), which could be
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useful if some other computer on your local network has a direct
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amateur radio connection.
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config DMASCC
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tristate "High-speed (DMA) SCC driver for AX.25"
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depends on ISA && AX25 && BROKEN_ON_SMP && ISA_DMA_API
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---help---
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This is a driver for high-speed SCC boards, i.e. those supporting
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DMA on one port. You usually use those boards to connect your
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computer to an amateur radio modem (such as the WA4DSY 56kbps
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modem), in order to send and receive AX.25 packet radio network
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traffic.
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Currently, this driver supports Ottawa PI/PI2, Paccomm/Gracilis
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PackeTwin, and S5SCC/DMA boards. They are detected automatically.
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If you have one of these cards, say Y here and read the AX25-HOWTO,
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available from <http://www.tldp.org/docs.html#howto>.
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This driver can operate multiple boards simultaneously. If you
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compile it as a module (by saying M instead of Y), it will be called
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dmascc. If you don't pass any parameter to the driver, all
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possible I/O addresses are probed. This could irritate other devices
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that are currently not in use. You may specify the list of addresses
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to be probed by "dmascc.io=addr1,addr2,..." (when compiled into the
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kernel image) or "io=addr1,addr2,..." (when loaded as a module). The
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network interfaces will be called dmascc0 and dmascc1 for the board
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detected first, dmascc2 and dmascc3 for the second one, and so on.
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Before you configure each interface with ifconfig, you MUST set
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certain parameters, such as channel access timing, clock mode, and
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DMA channel. This is accomplished with a small utility program,
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dmascc_cfg, available at
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<http://www.linux-ax25.org/wiki/Ax25-tools>. Please be sure to
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get at least version 1.27 of dmascc_cfg, as older versions will not
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work with the current driver.
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config SCC
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tristate "Z8530 SCC driver"
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depends on ISA && AX25 && ISA_DMA_API
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---help---
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These cards are used to connect your Linux box to an amateur radio
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in order to communicate with other computers. If you want to use
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this, read <file:Documentation/networking/z8530drv.txt> and the
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AX25-HOWTO, available from
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<http://www.tldp.org/docs.html#howto>. Also make sure to say Y
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to "Amateur Radio AX.25 Level 2" support.
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To compile this driver as a module, choose M here: the module
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will be called scc.
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config SCC_DELAY
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bool "additional delay for PA0HZP OptoSCC compatible boards"
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depends on SCC
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help
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Say Y here if you experience problems with the SCC driver not
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working properly; please read
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<file:Documentation/networking/z8530drv.txt> for details.
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If unsure, say N.
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config SCC_TRXECHO
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bool "support for TRX that feedback the tx signal to rx"
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depends on SCC
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help
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Some transmitters feed the transmitted signal back to the receive
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line. Say Y here to foil this by explicitly disabling the receiver
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during data transmission.
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If in doubt, say Y.
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config BAYCOM_SER_FDX
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tristate "BAYCOM ser12 fullduplex driver for AX.25"
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depends on AX25 && !S390
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select CRC_CCITT
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---help---
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This is one of two drivers for Baycom style simple amateur radio
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modems that connect to a serial interface. The driver supports the
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ser12 design in full-duplex mode. In addition, it allows the
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baudrate to be set between 300 and 4800 baud (however not all modems
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support all baudrates). This is the preferred driver. The next
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driver, "BAYCOM ser12 half-duplex driver for AX.25" is the old
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driver and still provided in case this driver does not work with
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your serial interface chip. To configure the driver, use the sethdlc
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utility available in the standard ax25 utilities package. For
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information on the modems, see <http://www.baycom.de/> and
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<file:Documentation/networking/baycom.txt>.
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To compile this driver as a module, choose M here: the module
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will be called baycom_ser_fdx. This is recommended.
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config BAYCOM_SER_HDX
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tristate "BAYCOM ser12 halfduplex driver for AX.25"
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depends on AX25 && !S390
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select CRC_CCITT
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---help---
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This is one of two drivers for Baycom style simple amateur radio
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modems that connect to a serial interface. The driver supports the
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ser12 design in half-duplex mode. This is the old driver. It is
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still provided in case your serial interface chip does not work with
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the full-duplex driver. This driver is deprecated. To configure
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the driver, use the sethdlc utility available in the standard ax25
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utilities package. For information on the modems, see
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<http://www.baycom.de/> and
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<file:Documentation/networking/baycom.txt>.
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To compile this driver as a module, choose M here: the module
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will be called baycom_ser_hdx. This is recommended.
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config BAYCOM_PAR
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tristate "BAYCOM picpar and par96 driver for AX.25"
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depends on PARPORT && AX25
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select CRC_CCITT
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---help---
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This is a driver for Baycom style simple amateur radio modems that
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connect to a parallel interface. The driver supports the picpar and
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par96 designs. To configure the driver, use the sethdlc utility
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available in the standard ax25 utilities package. For information on
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the modems, see <http://www.baycom.de/> and the file
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<file:Documentation/networking/baycom.txt>.
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To compile this driver as a module, choose M here: the module
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will be called baycom_par. This is recommended.
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config BAYCOM_EPP
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tristate "BAYCOM epp driver for AX.25"
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depends on PARPORT && AX25 && !64BIT
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select CRC_CCITT
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---help---
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This is a driver for Baycom style simple amateur radio modems that
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connect to a parallel interface. The driver supports the EPP
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designs. To configure the driver, use the sethdlc utility available
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in the standard ax25 utilities package. For information on the
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modems, see <http://www.baycom.de/> and the file
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<file:Documentation/networking/baycom.txt>.
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To compile this driver as a module, choose M here: the module
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will be called baycom_epp. This is recommended.
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config YAM
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tristate "YAM driver for AX.25"
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depends on AX25 && !S390
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help
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The YAM is a modem for packet radio which connects to the serial
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port and includes some of the functions of a Terminal Node
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Controller. If you have one of those, say Y here.
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To compile this driver as a module, choose M here: the module
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will be called yam.
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