107 lines
3.3 KiB
C
107 lines
3.3 KiB
C
/*
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* Copyright (c) 2003 M. Warner Losh, Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <dev/uart/uart.h>
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#include <dev/uart/uart_cpu.h>
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bus_space_tag_t uart_bus_space_io = I386_BUS_SPACE_IO;
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bus_space_tag_t uart_bus_space_mem = I386_BUS_SPACE_MEM;
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int
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uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
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{
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return (0); /* XXX */
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}
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int
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uart_cpu_getdev(int devtype, struct uart_devinfo *di)
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{
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unsigned int i, ivar, flags;
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/* Check the environment. */
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if (uart_getenv(devtype, di) == 0)
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return (0);
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/*
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* There is a serial port on all pc98 hardware. It is 8251 or
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* an enhance version of that. Some pc98 have the second serial
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* port which is 16550A compatible. However, for the sio driver,
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* flags selected which type of uart was in the sytem. We use
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* something similar to sort things out.
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*/
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for (i = 0; i < 1; i++) {
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if (resource_int_value("uart", i, "flags", &flags))
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continue;
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if (devtype == UART_DEV_CONSOLE && !UART_FLAGS_CONSOLE(flags))
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continue;
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if (devtype == UART_DEV_DBGPORT && !UART_FLAGS_DBGPORT(flags))
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continue;
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/*
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* We have a possible device. Make sure it's enabled and
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* that we have an I/O port.
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*/
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if (resource_int_value("uart", i, "disabled", &ivar) == 0 &&
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ivar != 0)
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continue;
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if (resource_int_value("uart", i, "port", &ivar) != 0 ||
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ivar == 0)
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continue;
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/*
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* Got it. Fill in the instance and return it. We have
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* both i8251 an ns8250 and successors on pc98.
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*/
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if (flags & 0x100)
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di->ops = uart_ns8250_ops;
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else
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di->ops = uart_i8251_ops;
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di->bas.chan = 0;
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di->bas.bst = uart_bus_space_io;
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if (bus_space_map(di->bas.bst, ivar, 8, 0, &di->bas.bsh) != 0)
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continue;
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di->bas.regshft = 0;
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di->bas.rclk = 0;
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if (resource_int_value("uart", i, "baud", &ivar) != 0)
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ivar = 0;
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di->baudrate = ivar;
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di->databits = 8;
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di->stopbits = 1;
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di->parity = UART_PARITY_NONE;
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return (0);
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}
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return (ENXIO);
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}
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