FreeBSD-5.3/sys/dev/uart/uart_cpu_sparc64.c
/*
* Copyright (c) 2003, 2004 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: src/sys/dev/uart/uart_cpu_sparc64.c,v 1.12 2004/08/15 02:17:20 marius Exp $");
#include "opt_isa.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <machine/bus_private.h>
#include <machine/resource.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/openfirm.h>
#include <machine/ofw_machdep.h>
#include <isa/isavar.h>
#include <dev/uart/uart.h>
#include <dev/uart/uart_bus.h>
#include <dev/uart/uart_cpu.h>
#include <sparc64/pci/ofw_pci.h>
#include <sparc64/isa/ofw_isa.h>
bus_space_tag_t uart_bus_space_io;
bus_space_tag_t uart_bus_space_mem;
static struct bus_space_tag bst_store[3];
static int
uart_cpu_channel(char *dev)
{
char alias[64];
phandle_t aliases;
int len;
strcpy(alias, dev);
if ((aliases = OF_finddevice("/aliases")) != -1)
OF_getprop(aliases, dev, alias, sizeof(alias));
len = strlen(alias);
if (len < 2 || alias[len - 2] != ':' || alias[len - 1] < 'a' ||
alias[len - 1] > 'b')
return (0);
return (alias[len - 1] - 'a' + 1);
}
int
uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
{
return ((b1->bsh == b2->bsh) ? 1 : 0);
}
/*
* Get the address of the UART that is selected as the console, if the
* console is an UART of course. Note that we enforce that both stdin and
* stdout are selected.
* Note that the currently active console (i.e. /chosen/stdout and
* /chosen/stdin) may not be the same as the device selected in the
* environment (ie /options/output-device and /options/input-device) because
* keyboard and screen were selected but the keyboard was unplugged or the
* user has changed the environment. In the latter case I would assume that
* the user expects that FreeBSD uses the new console setting.
* For weirder configurations, use ofw_console(4).
*/
static phandle_t
uart_cpu_getdev_console(phandle_t options, char *dev, size_t devsz)
{
char buf[32];
ihandle_t stdin, stdout;
phandle_t chosen, input;
if (OF_getprop(options, "input-device", dev, devsz) == -1)
return (-1);
if ((input = OF_finddevice(dev)) == -1)
return (-1);
if (OF_getprop(options, "output-device", buf, sizeof(buf)) == -1)
return (-1);
if (!strcmp(dev, "keyboard") && !strcmp(buf, "screen")) {
if ((chosen = OF_finddevice("/chosen")) == -1)
return (-1);
if (OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)) == -1)
return (-1);
if ((input = OF_instance_to_package(stdin)) == -1)
return (-1);
if (OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)) == -1)
return (-1);
if (OF_instance_to_package(stdout) != input)
return (-1);
snprintf(dev, devsz, "ttya");
} else if (OF_finddevice(buf) != input)
return (-1);
if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1)
return (-1);
if (strcmp(buf, "serial") != 0)
return (-1);
return (input);
}
/*
* Get the address of the UART that's selected as the debug port. Since
* there's no place for this in the OF, we use the kernel environment
* variable "hw.uart.dbgport". Note however that the variable is not a
* list of attributes. It's single device name or alias, as known by
* the OF.
*/
static phandle_t
uart_cpu_getdev_dbgport(phandle_t options, char *dev, size_t devsz)
{
char buf[32];
phandle_t input;
if (!getenv_string("hw.uart.dbgport", dev, devsz))
return (-1);
if ((input = OF_finddevice(dev)) == -1)
return (-1);
if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1)
return (-1);
if (strcmp(buf, "serial") != 0)
return (-1);
return (input);
}
static phandle_t
uart_cpu_getdev_keyboard(phandle_t root, char *dev, size_t devsz)
{
char buf[32];
phandle_t child, node;
child = OF_child(root);
while (child != 0 && child != -1) {
if (OF_getprop(child, "device_type", buf, sizeof(buf)) != -1 &&
!strcmp(buf, "serial") &&
OF_getprop(child, "keyboard", buf, sizeof(buf)) != -1) {
OF_getprop(child, "name", dev, devsz);
return (child);
}
if ((node = uart_cpu_getdev_keyboard(child, dev, devsz)) != -1)
return (node);
child = OF_peer(child);
}
return (-1);
}
int
uart_cpu_getdev(int devtype, struct uart_devinfo *di)
{
char buf[32], dev[32], compat[32];
phandle_t input, options;
bus_addr_t addr;
int baud, bits, error, space, stop;
char flag, par;
if ((options = OF_finddevice("/options")) == -1)
return (ENXIO);
switch (devtype) {
case UART_DEV_CONSOLE:
input = uart_cpu_getdev_console(options, dev, sizeof(dev));
break;
case UART_DEV_DBGPORT:
input = uart_cpu_getdev_dbgport(options, dev, sizeof(dev));
break;
case UART_DEV_KEYBOARD:
input = uart_cpu_getdev_keyboard(OF_peer(0), dev, sizeof(dev));
break;
default:
input = -1;
break;
}
if (input == -1)
return (ENXIO);
error = OF_decode_addr(input, &space, &addr);
if (error)
return (error);
/* Get the device class. */
if (OF_getprop(input, "name", buf, sizeof(buf)) == -1)
return (ENXIO);
if (OF_getprop(input, "compatible", compat, sizeof(compat)) == -1)
compat[0] = '\0';
di->bas.regshft = 0;
di->bas.rclk = 0;
if (!strcmp(buf, "se")) {
di->ops = uart_sab82532_ops;
di->bas.chan = uart_cpu_channel(dev);
addr += 64 * (di->bas.chan - 1);
} else if (!strcmp(buf, "zs")) {
di->ops = uart_z8530_ops;
di->bas.chan = uart_cpu_channel(dev);
di->bas.regshft = 1;
addr += 4 - 4 * (di->bas.chan - 1);
} else if (!strcmp(buf, "su") || !strcmp(buf, "su_pnp") ||
!strcmp(compat, "su") || !strcmp(compat, "su16550")) {
di->ops = uart_ns8250_ops;
di->bas.chan = 0;
} else
return (ENXIO);
/* Fill in the device info. */
di->bas.bst = &bst_store[devtype];
di->bas.bsh = sparc64_fake_bustag(space, addr, di->bas.bst);
/* Get the line settings. */
if (devtype == UART_DEV_KEYBOARD)
di->baudrate = 1200;
else
di->baudrate = 9600;
di->databits = 8;
di->stopbits = 1;
di->parity = UART_PARITY_NONE;
snprintf(buf, sizeof(buf), "%s-mode", dev);
if (OF_getprop(options, buf, buf, sizeof(buf)) == -1)
return (0);
if (sscanf(buf, "%d,%d,%c,%d,%c", &baud, &bits, &par, &stop, &flag)
!= 5)
return (0);
di->baudrate = baud;
di->databits = bits;
di->stopbits = stop;
di->parity = (par == 'n') ? UART_PARITY_NONE :
(par == 'o') ? UART_PARITY_ODD : UART_PARITY_EVEN;
return (0);
}
void
uart_cpu_identify(driver_t *driver, device_t parent)
{
#ifdef DEV_ISA
char buf[32];
struct isa_regs reg;
device_t child;
phandle_t node;
ofw_isa_intr_t intr;
#endif
#ifdef DEV_ISA
if (strcmp(device_get_name(parent), "isa") == 0) {
if ((node = ofw_bus_get_node(device_get_parent(parent))) == 0)
return;
for (node = OF_child(node); node != 0; node = OF_peer(node)) {
if (OF_getprop(node, "name", buf, sizeof(buf)) == -1)
continue;
if (strcmp(buf, "serial") != 0)
continue;
if ((OF_getprop(node, "reg", ®,
sizeof(reg)) == -1) ||
(OF_getprop(node, "interrupts", &intr,
sizeof(intr)) == -1))
continue;
if ((child = BUS_ADD_CHILD(parent, ISA_ORDER_SENSITIVE,
uart_driver_name, -1)) == NULL)
return;
bus_set_resource(child, SYS_RES_IOPORT, 0,
ISA_REG_PHYS(®), reg.size);
bus_set_resource(child, SYS_RES_IRQ, 0, intr, 1);
}
}
#endif
}