/* $NetBSD: com_acpi.c,v 1.44 2021/10/23 17:46:26 jmcneill Exp $ */
/*
* Copyright (c) 2002 Jared D. McNeill <
[email protected]>
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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>
__KERNEL_RCSID(0, "$NetBSD: com_acpi.c,v 1.44 2021/10/23 17:46:26 jmcneill Exp $");
#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <sys/termios.h>
#include <dev/acpi/acpivar.h>
#include <dev/acpi/acpi_intr.h>
#include <dev/ic/comvar.h>
static int com_acpi_match(device_t, cfdata_t , void *);
static void com_acpi_attach(device_t, device_t, void *);
struct com_acpi_softc {
struct com_softc sc_com;
void *sc_ih;
};
CFATTACH_DECL_NEW(com_acpi, sizeof(struct com_acpi_softc), com_acpi_match,
com_acpi_attach, NULL, NULL);
/*
* Supported device IDs
*/
static const struct device_compatible_entry compat_data[] = {
/* Standard PC COM port */
{ .compat = "PNP0500", .value = COM_TYPE_NORMAL },
/* 16550A-compatible COM port */
{ .compat = "PNP0501", .value = COM_TYPE_NORMAL },
/* Generic IRDA-compatible device */
{ .compat = "PNP0510", .value = COM_TYPE_NORMAL },
/* Generic IRDA-compatible device */
{ .compat = "PNP0511", .value = COM_TYPE_NORMAL },
/* IBM ThinkPad IRDA device */
{ .compat = "IBM0071", .value = COM_TYPE_NORMAL },
/* SMC SuperIO IRDA device */
{ .compat = "SMCF010", .value = COM_TYPE_NORMAL },
/* NSC IRDA device */
{ .compat = "NSC6001", .value = COM_TYPE_NORMAL },
/* Fujitsu Serial Pen Tablet */
{ .compat = "FUJ02E6", .value = COM_TYPE_NORMAL },
/* Hisilicon UART */
{ .compat = "HISI0031", .value = COM_TYPE_DW_APB },
/* Designware APB UART */
{ .compat = "8250dw", .value = COM_TYPE_DW_APB },
DEVICE_COMPAT_EOL
};
/*
* com_acpi_match: autoconf(9) match routine
*/
static int
com_acpi_match(device_t parent, cfdata_t match, void *aux)
{
struct acpi_attach_args *aa = aux;
return acpi_compatible_match(aa, compat_data);
}
/*
* com_acpi_attach: autoconf(9) attach routine
*/
static void
com_acpi_attach(device_t parent, device_t self, void *aux)
{
struct com_acpi_softc *asc = device_private(self);
struct com_softc *sc = &asc->sc_com;
struct acpi_attach_args *aa = aux;
const struct device_compatible_entry *dce;
struct acpi_resources res;
struct acpi_io *io;
struct acpi_mem *mem;
struct acpi_irq *irq;
bus_space_tag_t iot;
bus_space_handle_t ioh;
bus_addr_t base;
bus_size_t size;
ACPI_STATUS rv;
ACPI_INTEGER clock_freq;
ACPI_INTEGER reg_shift;
sc->sc_dev = self;
/* parse resources */
rv = acpi_resource_parse(sc->sc_dev, aa->aa_node->ad_handle, "_CRS",
&res, &acpi_resource_parse_ops_default);
if (ACPI_FAILURE(rv))
return;
/* find our i/o registers */
io = acpi_res_io(&res, 0);
if (io != NULL) {
iot = aa->aa_iot;
base = io->ar_base;
size = io->ar_length;
} else {
mem = acpi_res_mem(&res, 0);
if (mem != NULL) {
iot = aa->aa_memt;
base = mem->ar_base;
size = mem->ar_length;
} else {
aprint_error_dev(self, "unable to find i/o register "
"and memory resource\n");
goto out;
}
}
/* find our IRQ */
irq = acpi_res_irq(&res, 0);
if (irq == NULL) {
sc->sc_poll_ticks = 1;
}
if (!com_is_console(iot, base, &ioh))
if (bus_space_map(iot, base, size, 0, &ioh)) {
aprint_error_dev(self, "can't map i/o space\n");
goto out;
}
rv = acpi_dsd_integer(aa->aa_node->ad_handle, "reg-shift",
®_shift);
if (ACPI_FAILURE(rv)) {
reg_shift = 0;
}
com_init_regs_stride(&sc->sc_regs, iot, ioh, base, reg_shift);
aprint_normal("%s", device_xname(self));
dce = acpi_compatible_lookup(aa, compat_data);
KASSERT(dce != NULL);
sc->sc_type = dce->value;
if (com_probe_subr(&sc->sc_regs) == 0) {
aprint_error(": com probe failed\n");
goto out;
}
rv = acpi_dsd_integer(aa->aa_node->ad_handle, "clock-frequency",
&clock_freq);
if (ACPI_SUCCESS(rv))
sc->sc_frequency = clock_freq;
else
sc->sc_frequency = 115200 * 16;
com_attach_subr(sc);
if (sc->sc_poll_ticks == 0) {
asc->sc_ih = acpi_intr_establish(self,
(uint64_t)(uintptr_t)aa->aa_node->ad_handle,
IPL_SERIAL, true, comintr, sc, device_xname(self));
}
if (!pmf_device_register(self, NULL, com_resume))
aprint_error_dev(self, "couldn't establish a power handler\n");
goto cleanup;
/*
* In case of irq resource or i/o space mapping error, just set
* a NULL power handler. This may allow us to sleep later on.
*/
out:
if (!pmf_device_register(self, NULL, NULL))
aprint_error_dev(self, "couldn't establish a power handler\n");
cleanup:
acpi_resource_cleanup(&res);
}
