diff options
Diffstat (limited to 'sys/dev/uart/uart_cpu_pc98.c')
| -rw-r--r-- | sys/dev/uart/uart_cpu_pc98.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/sys/dev/uart/uart_cpu_pc98.c b/sys/dev/uart/uart_cpu_pc98.c new file mode 100644 index 000000000000..0ae255967727 --- /dev/null +++ b/sys/dev/uart/uart_cpu_pc98.c @@ -0,0 +1,100 @@ +/*- + * Copyright (c) 2003 M. Warner Losh, Marcel Moolenaar + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> + +#include <machine/bus.h> + +#include <dev/uart/uart.h> +#include <dev/uart/uart_cpu.h> + +bus_space_tag_t uart_bus_space_io = I386_BUS_SPACE_IO; +bus_space_tag_t uart_bus_space_mem = I386_BUS_SPACE_MEM; + +int +uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2) +{ + + return (0); /* XXX */ +} + +int +uart_cpu_getdev(int devtype, struct uart_devinfo *di) +{ + unsigned int i, ivar, flags; + + /* Check the environment. */ + if (uart_getenv(devtype, di) == 0) + return (0); + + /* + * There is a serial port on all pc98 hardware. It is 8251 or + * an enhance version of that. Some pc98 have the second serial + * port which is 16550A compatible. However, for the sio driver, + * flags selected which type of uart was in the sytem. We use + * something similar to sort things out. + */ + for (i = 0; i < 1; i++) { + if (resource_int_value("uart", i, "flags", &flags)) + continue; + if (devtype == UART_DEV_CONSOLE && !UART_FLAGS_CONSOLE(flags)) + continue; + if (devtype == UART_DEV_DBGPORT && !UART_FLAGS_DBGPORT(flags)) + continue; + /* + * We have a possible device. Make sure it's enabled and + * that we have an I/O port. + */ + if (resource_int_value("uart", i, "disabled", &ivar) == 0 && + ivar != 0) + continue; + if (resource_int_value("uart", i, "port", &ivar) != 0 || + ivar == 0) + continue; + + di->ops = uart_ns8250_ops; + di->bas.chan = 0; + di->bas.bst = uart_bus_space_io; + if (bus_space_map(di->bas.bst, ivar, 8, 0, &di->bas.bsh) != 0) + continue; + di->bas.regshft = 0; + di->bas.rclk = 0; + if (resource_int_value("uart", i, "baud", &ivar) != 0) + ivar = 0; + di->baudrate = ivar; + di->databits = 8; + di->stopbits = 1; + di->parity = UART_PARITY_NONE; + return (0); + } + + return (ENXIO); +} |