875f70dba4
and the Z8530 drivers used the I/O address as a quick and dirty way to determine which channel they operated on, but formalizing this by introducing iobase is not a solution. How for example would a driver know which channel it controls for a multi-channel UART that only has a single I/O range? Instead, add an explicit field, called chan, to struct uart_bas that holds the channel within a device, or 0 otherwise. The chan field is initialized both by the system device probing (i.e. a system console) or it is passed down to uart_bus_probe() by any of the bus front-ends. As such, it impacts all platforms and bus drivers and makes it a rather large commit. Remove the use of iobase in uart_cpu_eqres() for pc98. It is expected that platforms have the capability to compare tag and handle pairs for equality; as to determine whether two pairs access the same device or not. The use of iobase for pc98 makes it impossible to formalize this and turn it into a real newbus function later. This commit reverts uart_cpu_eqres() for pc98 to an unimplemented function. It has to be reimplemented using only the tag and handle fields in struct uart_bas. Rewrite the SAB82532 and Z8530 drivers to use the chan field in struct uart_bas. Remove the IS_CHANNEL_A and IS_CHANNEL_B macros. We don't need to abstract anything anymore. Discussed with: nyan Tested on: i386, ia64, sparc64
145 lines
4.2 KiB
C
145 lines
4.2 KiB
C
/*
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* Copyright (c) 2003 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/bootinfo.h>
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#include <machine/bus.h>
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#include <machine/dig64.h>
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#include <machine/vmparam.h>
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#include <dev/uart/uart.h>
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#include <dev/uart/uart_cpu.h>
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static int dig64_to_uart_parity[] = {
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UART_PARITY_NONE, UART_PARITY_NONE, UART_PARITY_EVEN,
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UART_PARITY_ODD, UART_PARITY_MARK, UART_PARITY_SPACE
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};
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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 && b1->bst == b2->bst) ? 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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struct dig64_hcdp_table *tbl;
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struct dig64_hcdp_entry *ent;
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bus_addr_t addr;
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unsigned int i, ivar;
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/*
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* Use the DIG64 HCDP table if present.
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*/
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if (bootinfo.bi_hcdp != 0) {
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tbl = (void*)IA64_PHYS_TO_RR7(bootinfo.bi_hcdp);
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for (i = 0; i < tbl->entries; i++) {
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ent = tbl->entry + i;
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if (devtype == UART_DEV_CONSOLE &&
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ent->type != DIG64_HCDP_CONSOLE)
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continue;
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if (devtype == UART_DEV_DBGPORT &&
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ent->type != DIG64_HCDP_DBGPORT)
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continue;
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addr = ent->address.addr_high;
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addr = (addr << 32) + ent->address.addr_low;
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di->ops = uart_ns8250_ops;
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di->bas.chan = 0;
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di->bas.bst = (ent->address.addr_space == 0)
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? IA64_BUS_SPACE_MEM : IA64_BUS_SPACE_IO;
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if (bus_space_map(di->bas.bst, addr, 8, 0,
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&di->bas.bsh) != 0)
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continue;
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di->bas.regshft = 0;
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di->bas.rclk = ent->pclock << 4;
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/* We don't deal with 64-bit baud rates. */
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di->baudrate = ent->baud_low;
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di->databits = ent->databits;
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di->stopbits = ent->stopbits;
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di->parity = (ent->parity >= 6) ? UART_PARITY_NONE
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: dig64_to_uart_parity[ent->parity];
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return (0);
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}
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/* FALLTHROUGH */
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}
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/*
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* Scan the hints for backward compatibility. We only try units
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* 0 to 3 (inclusive). This covers the ISA legacy where 4 UARTs
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* had their resources predefined.
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*/
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for (i = 0; i < 4; i++) {
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if (resource_int_value("uart", i, "flags", &ivar))
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continue;
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if (devtype == UART_DEV_CONSOLE && !UART_FLAGS_CONSOLE(ivar))
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continue;
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if (devtype == UART_DEV_DBGPORT && !UART_FLAGS_DBGPORT(ivar))
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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 only have
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* ns8250 and successors on i386.
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*/
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di->ops = uart_ns8250_ops;
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di->bas.chan = 0;
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di->bas.bst = IA64_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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