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9bef3d41 PG |
1 | # |
2 | # The 8250/16550 serial drivers. You shouldn't be in this list unless | |
3 | # you somehow have an implicit or explicit dependency on SERIAL_8250. | |
4 | # | |
5 | ||
6 | config 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 and Stallion multi | |
16 | serial port drivers do not need this driver built in for them to | |
17 | work.) | |
18 | ||
19 | To compile this driver as a module, choose M here: the | |
20 | module will be called 8250. | |
21 | [WARNING: Do not compile this driver as a module if you are using | |
22 | non-standard serial ports, since the configuration information will | |
23 | be lost when the driver is unloaded. This limitation may be lifted | |
24 | in the future.] | |
25 | ||
26 | BTW1: If you have a mouseman serial mouse which is not recognized by | |
27 | the X window system, try running gpm first. | |
28 | ||
29 | BTW2: If you intend to use a software modem (also called Winmodem) | |
30 | under Linux, forget it. These modems are crippled and require | |
31 | proprietary drivers which are only available under Windows. | |
32 | ||
33 | Most people will say Y or M here, so that they can use serial mice, | |
34 | modems and similar devices connecting to the standard serial ports. | |
35 | ||
9326b047 JS |
36 | config SERIAL_8250_DEPRECATED_OPTIONS |
37 | bool "Support 8250_core.* kernel options (DEPRECATED)" | |
38 | depends on SERIAL_8250 | |
39 | default y | |
40 | ---help--- | |
41 | In 3.7 we renamed 8250 to 8250_core by mistake, so now we have to | |
42 | accept kernel parameters in both forms like 8250_core.nr_uarts=4 and | |
43 | 8250.nr_uarts=4. We now renamed the module back to 8250, but if | |
44 | anybody noticed in 3.7 and changed their userspace we still have to | |
45 | keep the 8350_core.* options around until they revert the changes | |
46 | they already did. | |
47 | ||
48 | If 8250 is built as a module, this adds 8250_core alias instead. | |
49 | ||
50 | If you did not notice yet and/or you have userspace from pre-3.7, it | |
51 | is safe (and recommended) to say N here. | |
52 | ||
835d844d SY |
53 | config SERIAL_8250_PNP |
54 | bool "8250/16550 PNP device support" if EXPERT | |
55 | depends on SERIAL_8250 && PNP | |
56 | default y | |
57 | ---help--- | |
58 | This builds standard PNP serial support. You may be able to | |
59 | disable this feature if you only need legacy serial support. | |
60 | ||
9bef3d41 PG |
61 | config SERIAL_8250_CONSOLE |
62 | bool "Console on 8250/16550 and compatible serial port" | |
63 | depends on SERIAL_8250=y | |
64 | select SERIAL_CORE_CONSOLE | |
65 | ---help--- | |
66 | If you say Y here, it will be possible to use a serial port as the | |
67 | system console (the system console is the device which receives all | |
68 | kernel messages and warnings and which allows logins in single user | |
69 | mode). This could be useful if some terminal or printer is connected | |
70 | to that serial port. | |
71 | ||
72 | Even if you say Y here, the currently visible virtual console | |
73 | (/dev/tty0) will still be used as the system console by default, but | |
74 | you can alter that using a kernel command line option such as | |
75 | "console=ttyS1". (Try "man bootparam" or see the documentation of | |
76 | your boot loader (grub or lilo or loadlin) about how to pass options | |
77 | to the kernel at boot time.) | |
78 | ||
79 | If you don't have a VGA card installed and you say Y here, the | |
80 | kernel will automatically use the first serial line, /dev/ttyS0, as | |
81 | system console. | |
82 | ||
83 | You can set that using a kernel command line option such as | |
84 | "console=uart8250,io,0x3f8,9600n8" | |
85 | "console=uart8250,mmio,0xff5e0000,115200n8". | |
86 | and it will switch to normal serial console when the corresponding | |
87 | port is ready. | |
88 | "earlycon=uart8250,io,0x3f8,9600n8" | |
89 | "earlycon=uart8250,mmio,0xff5e0000,115200n8". | |
90 | it will not only setup early console. | |
91 | ||
92 | If unsure, say N. | |
93 | ||
94 | config FIX_EARLYCON_MEM | |
95 | bool | |
96 | depends on X86 | |
97 | default y | |
98 | ||
99 | config SERIAL_8250_GSC | |
100 | tristate | |
101 | depends on SERIAL_8250 && GSC | |
102 | default SERIAL_8250 | |
103 | ||
9ee4b83e HK |
104 | config SERIAL_8250_DMA |
105 | bool "DMA support for 16550 compatible UART controllers" if EXPERT | |
106 | depends on SERIAL_8250 && DMADEVICES=y | |
107 | default SERIAL_8250 | |
108 | help | |
109 | This builds DMA support that can be used with 8250/16650 | |
110 | compatible UART controllers that support DMA signaling. | |
111 | ||
9bef3d41 PG |
112 | config SERIAL_8250_PCI |
113 | tristate "8250/16550 PCI device support" if EXPERT | |
114 | depends on SERIAL_8250 && PCI | |
115 | default SERIAL_8250 | |
116 | help | |
117 | This builds standard PCI serial support. You may be able to | |
118 | disable this feature if you only need legacy serial support. | |
119 | Saves about 9K. | |
120 | ||
9bef3d41 PG |
121 | config SERIAL_8250_HP300 |
122 | tristate | |
123 | depends on SERIAL_8250 && HP300 | |
124 | default SERIAL_8250 | |
125 | ||
126 | config SERIAL_8250_CS | |
127 | tristate "8250/16550 PCMCIA device support" | |
128 | depends on PCMCIA && SERIAL_8250 | |
129 | ---help--- | |
130 | Say Y here to enable support for 16-bit PCMCIA serial devices, | |
131 | including serial port cards, modems, and the modem functions of | |
132 | multi-function Ethernet/modem cards. (PCMCIA- or PC-cards are | |
133 | credit-card size devices often used with laptops.) | |
134 | ||
135 | To compile this driver as a module, choose M here: the | |
136 | module will be called serial_cs. | |
137 | ||
138 | If unsure, say N. | |
139 | ||
140 | config SERIAL_8250_NR_UARTS | |
141 | int "Maximum number of 8250/16550 serial ports" | |
142 | depends on SERIAL_8250 | |
143 | default "4" | |
144 | help | |
145 | Set this to the number of serial ports you want the driver | |
146 | to support. This includes any ports discovered via ACPI or | |
147 | PCI enumeration and any ports that may be added at run-time | |
148 | via hot-plug, or any ISA multi-port serial cards. | |
149 | ||
150 | config SERIAL_8250_RUNTIME_UARTS | |
151 | int "Number of 8250/16550 serial ports to register at runtime" | |
152 | depends on SERIAL_8250 | |
153 | range 0 SERIAL_8250_NR_UARTS | |
154 | default "4" | |
155 | help | |
156 | Set this to the maximum number of serial ports you want | |
157 | the kernel to register at boot time. This can be overridden | |
158 | with the module parameter "nr_uarts", or boot-time parameter | |
159 | 8250.nr_uarts | |
160 | ||
161 | config SERIAL_8250_EXTENDED | |
162 | bool "Extended 8250/16550 serial driver options" | |
163 | depends on SERIAL_8250 | |
164 | help | |
165 | If you wish to use any non-standard features of the standard "dumb" | |
166 | driver, say Y here. This includes HUB6 support, shared serial | |
167 | interrupts, special multiport support, support for more than the | |
168 | four COM 1/2/3/4 boards, etc. | |
169 | ||
170 | Note that the answer to this question won't directly affect the | |
171 | kernel: saying N will just cause the configurator to skip all | |
172 | the questions about serial driver options. If unsure, say N. | |
173 | ||
174 | config SERIAL_8250_MANY_PORTS | |
175 | bool "Support more than 4 legacy serial ports" | |
176 | depends on SERIAL_8250_EXTENDED && !IA64 | |
177 | help | |
178 | Say Y here if you have dumb serial boards other than the four | |
179 | standard COM 1/2/3/4 ports. This may happen if you have an AST | |
180 | FourPort, Accent Async, Boca (read the Boca mini-HOWTO, available | |
181 | from <http://www.tldp.org/docs.html#howto>), or other custom | |
182 | serial port hardware which acts similar to standard serial port | |
183 | hardware. If you only use the standard COM 1/2/3/4 ports, you can | |
184 | say N here to save some memory. You can also say Y if you have an | |
185 | "intelligent" multiport card such as Cyclades, Digiboards, etc. | |
186 | ||
187 | # | |
188 | # Multi-port serial cards | |
189 | # | |
190 | ||
191 | config SERIAL_8250_FOURPORT | |
192 | tristate "Support Fourport cards" | |
193 | depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS | |
194 | help | |
195 | Say Y here if you have an AST FourPort serial board. | |
196 | ||
197 | To compile this driver as a module, choose M here: the module | |
198 | will be called 8250_fourport. | |
199 | ||
200 | config SERIAL_8250_ACCENT | |
201 | tristate "Support Accent cards" | |
202 | depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS | |
203 | help | |
204 | Say Y here if you have an Accent Async serial board. | |
205 | ||
206 | To compile this driver as a module, choose M here: the module | |
207 | will be called 8250_accent. | |
208 | ||
209 | config SERIAL_8250_BOCA | |
210 | tristate "Support Boca cards" | |
211 | depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS | |
212 | help | |
213 | Say Y here if you have a Boca serial board. Please read the Boca | |
214 | mini-HOWTO, available from <http://www.tldp.org/docs.html#howto> | |
215 | ||
216 | To compile this driver as a module, choose M here: the module | |
217 | will be called 8250_boca. | |
218 | ||
219 | config SERIAL_8250_EXAR_ST16C554 | |
220 | tristate "Support Exar ST16C554/554D Quad UART" | |
221 | depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS | |
222 | help | |
223 | The Uplogix Envoy TU301 uses this Exar Quad UART. If you are | |
224 | tinkering with your Envoy TU301, or have a machine with this UART, | |
225 | say Y here. | |
226 | ||
227 | To compile this driver as a module, choose M here: the module | |
228 | will be called 8250_exar_st16c554. | |
229 | ||
230 | config SERIAL_8250_HUB6 | |
231 | tristate "Support Hub6 cards" | |
232 | depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS | |
233 | help | |
234 | Say Y here if you have a HUB6 serial board. | |
235 | ||
236 | To compile this driver as a module, choose M here: the module | |
237 | will be called 8250_hub6. | |
238 | ||
239 | # | |
240 | # Misc. options/drivers. | |
241 | # | |
242 | ||
243 | config SERIAL_8250_SHARE_IRQ | |
244 | bool "Support for sharing serial interrupts" | |
245 | depends on SERIAL_8250_EXTENDED | |
246 | help | |
247 | Some serial boards have hardware support which allows multiple dumb | |
248 | serial ports on the same board to share a single IRQ. To enable | |
249 | support for this in the serial driver, say Y here. | |
250 | ||
251 | config SERIAL_8250_DETECT_IRQ | |
252 | bool "Autodetect IRQ on standard ports (unsafe)" | |
253 | depends on SERIAL_8250_EXTENDED | |
254 | help | |
255 | Say Y here if you want the kernel to try to guess which IRQ | |
256 | to use for your serial port. | |
257 | ||
258 | This is considered unsafe; it is far better to configure the IRQ in | |
259 | a boot script using the setserial command. | |
260 | ||
261 | If unsure, say N. | |
262 | ||
263 | config SERIAL_8250_RSA | |
264 | bool "Support RSA serial ports" | |
265 | depends on SERIAL_8250_EXTENDED | |
266 | help | |
267 | ::: To be written ::: | |
268 | ||
9bef3d41 PG |
269 | config SERIAL_8250_ACORN |
270 | tristate "Acorn expansion card serial port support" | |
271 | depends on ARCH_ACORN && SERIAL_8250 | |
272 | help | |
273 | If you have an Atomwide Serial card or Serial Port card for an Acorn | |
274 | system, say Y to this option. The driver can handle 1, 2, or 3 port | |
275 | cards. If unsure, say N. | |
276 | ||
9bef3d41 PG |
277 | config SERIAL_8250_FSL |
278 | bool | |
279 | depends on SERIAL_8250_CONSOLE && PPC_UDBG_16550 | |
280 | default PPC | |
281 | ||
282 | config SERIAL_8250_DW | |
283 | tristate "Support for Synopsys DesignWare 8250 quirks" | |
6a7320c4 | 284 | depends on SERIAL_8250 |
9bef3d41 PG |
285 | help |
286 | Selecting this option will enable handling of the extra features | |
287 | present in the Synopsys DesignWare APB UART. | |
22886ee9 MD |
288 | |
289 | config SERIAL_8250_EM | |
46e99c4a | 290 | tristate "Support for Emma Mobile integrated serial port" |
22886ee9 MD |
291 | depends on SERIAL_8250 && ARM && HAVE_CLK |
292 | help | |
293 | Selecting this option will add support for the integrated serial | |
294 | port hardware found on the Emma Mobile line of processors. | |
295 | If unsure, say N. | |
c420811f JC |
296 | |
297 | config SERIAL_8250_RT288X | |
298 | bool "Ralink RT288x/RT305x/RT3662/RT3883 serial port support" | |
299 | depends on SERIAL_8250 && (SOC_RT288X || SOC_RT305X || SOC_RT3883) | |
300 | help | |
301 | If you have a Ralink RT288x/RT305x SoC based board and want to use the | |
302 | serial port, say Y to this option. The driver can handle up to 2 serial | |
303 | ports. If unsure, say N. |