1
2
3
4
5
6config SERIAL_8250
7 tristate "8250/16550 and compatible serial support"
8 select SERIAL_CORE
9 ---help---
10 This selects whether you want to include the driver for the standard
11 serial ports. The standard answer is Y. People who might say N
12 here are those that are setting up dedicated Ethernet WWW/FTP
13 servers, or users that have one of the various bus mice instead of a
14 serial mouse and don't intend to use their machine's standard serial
15 port for anything. (Note that the Cyclades multi serial port driver
16 does not need this driver built in for it to work.)
17
18 To compile this driver as a module, choose M here: the
19 module will be called 8250.
20 [WARNING: Do not compile this driver as a module if you are using
21 non-standard serial ports, since the configuration information will
22 be lost when the driver is unloaded. This limitation may be lifted
23 in the future.]
24
25 BTW1: If you have a mouseman serial mouse which is not recognized by
26 the X window system, try running gpm first.
27
28 BTW2: If you intend to use a software modem (also called Winmodem)
29 under Linux, forget it. These modems are crippled and require
30 proprietary drivers which are only available under Windows.
31
32 Most people will say Y or M here, so that they can use serial mice,
33 modems and similar devices connecting to the standard serial ports.
34
35config SERIAL_8250_DEPRECATED_OPTIONS
36 bool "Support 8250_core.* kernel options (DEPRECATED)"
37 depends on SERIAL_8250
38 default y
39 ---help---
40 In 3.7 we renamed 8250 to 8250_core by mistake, so now we have to
41 accept kernel parameters in both forms like 8250_core.nr_uarts=4 and
42 8250.nr_uarts=4. We now renamed the module back to 8250, but if
43 anybody noticed in 3.7 and changed their userspace we still have to
44 keep the 8350_core.* options around until they revert the changes
45 they already did.
46
47 If 8250 is built as a module, this adds 8250_core alias instead.
48
49 If you did not notice yet and/or you have userspace from pre-3.7, it
50 is safe (and recommended) to say N here.
51
52config SERIAL_8250_PNP
53 bool "8250/16550 PNP device support" if EXPERT
54 depends on SERIAL_8250 && PNP
55 default y
56 ---help---
57 This builds standard PNP serial support. You may be able to
58 disable this feature if you only need legacy serial support.
59
60config SERIAL_8250_CONSOLE
61 bool "Console on 8250/16550 and compatible serial port"
62 depends on SERIAL_8250=y
63 select SERIAL_CORE_CONSOLE
64 ---help---
65 If you say Y here, it will be possible to use a serial port as the
66 system console (the system console is the device which receives all
67 kernel messages and warnings and which allows logins in single user
68 mode). This could be useful if some terminal or printer is connected
69 to that serial port.
70
71 Even if you say Y here, the currently visible virtual console
72 (/dev/tty0) will still be used as the system console by default, but
73 you can alter that using a kernel command line option such as
74 "console=ttyS1". (Try "man bootparam" or see the documentation of
75 your boot loader (grub or lilo or loadlin) about how to pass options
76 to the kernel at boot time.)
77
78 If you don't have a VGA card installed and you say Y here, the
79 kernel will automatically use the first serial line, /dev/ttyS0, as
80 system console.
81
82 You can set that using a kernel command line option such as
83 "console=uart8250,io,0x3f8,9600n8"
84 "console=uart8250,mmio,0xff5e0000,115200n8".
85 and it will switch to normal serial console when the corresponding
86 port is ready.
87 "earlycon=uart8250,io,0x3f8,9600n8"
88 "earlycon=uart8250,mmio,0xff5e0000,115200n8".
89 it will not only setup early console.
90
91 If unsure, say N.
92
93config FIX_EARLYCON_MEM
94 bool
95 depends on X86
96 default y
97
98config SERIAL_8250_GSC
99 tristate
100 depends on SERIAL_8250 && GSC
101 default SERIAL_8250
102
103config SERIAL_8250_DMA
104 bool "DMA support for 16550 compatible UART controllers" if EXPERT
105 depends on SERIAL_8250 && DMADEVICES=y
106 default SERIAL_8250
107 help
108 This builds DMA support that can be used with 8250/16650
109 compatible UART controllers that support DMA signaling.
110
111config SERIAL_8250_PCI
112 tristate "8250/16550 PCI device support" if EXPERT
113 depends on SERIAL_8250 && PCI
114 default SERIAL_8250
115 help
116 This builds standard PCI serial support. You may be able to
117 disable this feature if you only need legacy serial support.
118 Saves about 9K.
119
120config SERIAL_8250_HP300
121 tristate
122 depends on SERIAL_8250 && HP300
123 default SERIAL_8250
124
125config SERIAL_8250_CS
126 tristate "8250/16550 PCMCIA device support"
127 depends on PCMCIA && SERIAL_8250
128 ---help---
129 Say Y here to enable support for 16-bit PCMCIA serial devices,
130 including serial port cards, modems, and the modem functions of
131 multi-function Ethernet/modem cards. (PCMCIA- or PC-cards are
132 credit-card size devices often used with laptops.)
133
134 To compile this driver as a module, choose M here: the
135 module will be called serial_cs.
136
137 If unsure, say N.
138
139config SERIAL_8250_NR_UARTS
140 int "Maximum number of 8250/16550 serial ports"
141 depends on SERIAL_8250
142 default "4"
143 help
144 Set this to the number of serial ports you want the driver
145 to support. This includes any ports discovered via ACPI or
146 PCI enumeration and any ports that may be added at run-time
147 via hot-plug, or any ISA multi-port serial cards.
148
149config SERIAL_8250_RUNTIME_UARTS
150 int "Number of 8250/16550 serial ports to register at runtime"
151 depends on SERIAL_8250
152 range 0 SERIAL_8250_NR_UARTS
153 default "4"
154 help
155 Set this to the maximum number of serial ports you want
156 the kernel to register at boot time. This can be overridden
157 with the module parameter "nr_uarts", or boot-time parameter
158 8250.nr_uarts
159
160config SERIAL_8250_EXTENDED
161 bool "Extended 8250/16550 serial driver options"
162 depends on SERIAL_8250
163 help
164 If you wish to use any non-standard features of the standard "dumb"
165 driver, say Y here. This includes HUB6 support, shared serial
166 interrupts, special multiport support, support for more than the
167 four COM 1/2/3/4 boards, etc.
168
169 Note that the answer to this question won't directly affect the
170 kernel: saying N will just cause the configurator to skip all
171 the questions about serial driver options. If unsure, say N.
172
173config SERIAL_8250_MANY_PORTS
174 bool "Support more than 4 legacy serial ports"
175 depends on SERIAL_8250_EXTENDED && !IA64
176 help
177 Say Y here if you have dumb serial boards other than the four
178 standard COM 1/2/3/4 ports. This may happen if you have an AST
179 FourPort, Accent Async, Boca (read the Boca mini-HOWTO, available
180 from <http://www.tldp.org/docs.html#howto>), or other custom
181 serial port hardware which acts similar to standard serial port
182 hardware. If you only use the standard COM 1/2/3/4 ports, you can
183 say N here to save some memory. You can also say Y if you have an
184 "intelligent" multiport card such as Cyclades, Digiboards, etc.
185
186
187
188
189
190config SERIAL_8250_FOURPORT
191 tristate "Support Fourport cards"
192 depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS
193 help
194 Say Y here if you have an AST FourPort serial board.
195
196 To compile this driver as a module, choose M here: the module
197 will be called 8250_fourport.
198
199config SERIAL_8250_ACCENT
200 tristate "Support Accent cards"
201 depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS
202 help
203 Say Y here if you have an Accent Async serial board.
204
205 To compile this driver as a module, choose M here: the module
206 will be called 8250_accent.
207
208config SERIAL_8250_BOCA
209 tristate "Support Boca cards"
210 depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS
211 help
212 Say Y here if you have a Boca serial board. Please read the Boca
213 mini-HOWTO, available from <http://www.tldp.org/docs.html#howto>
214
215 To compile this driver as a module, choose M here: the module
216 will be called 8250_boca.
217
218config SERIAL_8250_EXAR_ST16C554
219 tristate "Support Exar ST16C554/554D Quad UART"
220 depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS
221 help
222 The Uplogix Envoy TU301 uses this Exar Quad UART. If you are
223 tinkering with your Envoy TU301, or have a machine with this UART,
224 say Y here.
225
226 To compile this driver as a module, choose M here: the module
227 will be called 8250_exar_st16c554.
228
229config SERIAL_8250_HUB6
230 tristate "Support Hub6 cards"
231 depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS
232 help
233 Say Y here if you have a HUB6 serial board.
234
235 To compile this driver as a module, choose M here: the module
236 will be called 8250_hub6.
237
238
239
240
241
242config SERIAL_8250_SHARE_IRQ
243 bool "Support for sharing serial interrupts"
244 depends on SERIAL_8250_EXTENDED
245 help
246 Some serial boards have hardware support which allows multiple dumb
247 serial ports on the same board to share a single IRQ. To enable
248 support for this in the serial driver, say Y here.
249
250config SERIAL_8250_DETECT_IRQ
251 bool "Autodetect IRQ on standard ports (unsafe)"
252 depends on SERIAL_8250_EXTENDED
253 help
254 Say Y here if you want the kernel to try to guess which IRQ
255 to use for your serial port.
256
257 This is considered unsafe; it is far better to configure the IRQ in
258 a boot script using the setserial command.
259
260 If unsure, say N.
261
262config SERIAL_8250_RSA
263 bool "Support RSA serial ports"
264 depends on SERIAL_8250_EXTENDED
265 help
266 ::: To be written :::
267
268config SERIAL_8250_ACORN
269 tristate "Acorn expansion card serial port support"
270 depends on ARCH_ACORN && SERIAL_8250
271 help
272 If you have an Atomwide Serial card or Serial Port card for an Acorn
273 system, say Y to this option. The driver can handle 1, 2, or 3 port
274 cards. If unsure, say N.
275
276config SERIAL_8250_FSL
277 bool
278 depends on SERIAL_8250_CONSOLE && PPC_UDBG_16550
279 default PPC
280
281config SERIAL_8250_DW
282 tristate "Support for Synopsys DesignWare 8250 quirks"
283 depends on SERIAL_8250
284 help
285 Selecting this option will enable handling of the extra features
286 present in the Synopsys DesignWare APB UART.
287
288config SERIAL_8250_EM
289 tristate "Support for Emma Mobile integrated serial port"
290 depends on SERIAL_8250 && ARM && HAVE_CLK
291 help
292 Selecting this option will add support for the integrated serial
293 port hardware found on the Emma Mobile line of processors.
294 If unsure, say N.
295
296config SERIAL_8250_RT288X
297 bool "Ralink RT288x/RT305x/RT3662/RT3883 serial port support"
298 depends on SERIAL_8250 && (SOC_RT288X || SOC_RT305X || SOC_RT3883)
299 help
300 If you have a Ralink RT288x/RT305x SoC based board and want to use the
301 serial port, say Y to this option. The driver can handle up to 2 serial
302 ports. If unsure, say N.
303
