de2fa7b8af
a pointer to struct bus_space. The structure contains function pointers that do the actual bus space access. The reason for this change is that previously all bus space accesses were little endian (i.e. had an explicit byte-swap for multi-byte accesses), because all busses on Macs are little endian. The upcoming support for Book E, and in particular the E500 core, requires support for big-endian busses because all embedded peripherals are in the native byte-order. With this change, there's no distinction between I/O port space and memory mapped I/O. PowerPC doesn't have I/O port space. Busses assign tags based on the byte-order only. For that purpose, two global structures exist (bs_be_tag and bs_le_tag), of which the address can be taken to get a valid tag. Obtained from: Juniper, Semihalf
113 lines
3.1 KiB
C
113 lines
3.1 KiB
C
/*-
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* Copyright (c) 2006 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 <machine/bus.h>
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#include <dev/ofw/openfirm.h>
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#include <machine/ofw_machdep.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 = &bs_le_tag;
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bus_space_tag_t uart_bus_space_mem = &bs_le_tag;
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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 ((b1->bsh == b2->bsh) ? 1 : 0);
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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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char buf[64];
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struct uart_class *class;
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phandle_t input, opts;
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int error;
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class = &uart_z8530_class;
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if (class == NULL)
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return (ENXIO);
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if ((opts = OF_finddevice("/options")) == -1)
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return (ENXIO);
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switch (devtype) {
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case UART_DEV_CONSOLE:
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if (OF_getprop(opts, "input-device", buf, sizeof(buf)) == -1)
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return (ENXIO);
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input = OF_finddevice(buf);
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if (input == -1)
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return (ENXIO);
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if (OF_getprop(opts, "output-device", buf, sizeof(buf)) == -1)
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return (ENXIO);
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if (OF_finddevice(buf) != input)
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return (ENXIO);
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break;
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case UART_DEV_DBGPORT:
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if (!getenv_string("hw.uart.dbgport", buf, sizeof(buf)))
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return (ENXIO);
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input = OF_finddevice(buf);
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if (input == -1)
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return (ENXIO);
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break;
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default:
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return (EINVAL);
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}
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if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1)
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return (ENXIO);
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if (strcmp(buf, "serial") != 0)
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return (ENXIO);
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if (OF_getprop(input, "name", buf, sizeof(buf)) == -1)
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return (ENXIO);
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if (strcmp(buf, "ch-a"))
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return (ENXIO);
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error = OF_decode_addr(input, 0, &di->bas.bst, &di->bas.bsh);
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if (error)
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return (error);
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di->ops = uart_getops(class);
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di->bas.rclk = 230400;
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di->bas.chan = 1;
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di->bas.regshft = 4;
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di->baudrate = 0;
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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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