git: 7d380b986a18 - main - spibus(4): Add support for ACPI-based children enumeration
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Date: Thu, 03 Aug 2023 16:12:06 UTC
The branch main has been updated by wulf:
URL: https://cgit.FreeBSD.org/src/commit/?id=7d380b986a1808164846cfd9afb5ae3f99921fcf
commit 7d380b986a1808164846cfd9afb5ae3f99921fcf
Author: Vladimir Kondratyev <wulf@FreeBSD.org>
AuthorDate: 2023-08-03 16:10:50 +0000
Commit: Vladimir Kondratyev <wulf@FreeBSD.org>
CommitDate: 2023-08-03 16:10:50 +0000
spibus(4): Add support for ACPI-based children enumeration
When spibus is attached as child of Intel SPI controller it scans all
ACPI nodes for "SPI Serial Bus Connection Resource Descriptor" described
in section 19.6.126 of ACPI specs.
If such a descriptor is found, SPI child is added to spibus, it's SPI
chip select, mode, clock, IRQ resource and ACPI handle are added to ivars.
Existing ACPI bus-hosted child is deleted afterwards.
Apple ACPI SPI extensions are supported.
Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D41248
---
sys/conf/files | 1 +
sys/dev/spibus/acpi_spibus.c | 580 ++++++++++++++++++++++++++++++++++++++++
sys/dev/spibus/spibus.c | 26 +-
sys/dev/spibus/spibusvar.h | 10 +-
sys/modules/spi/spibus/Makefile | 5 +
5 files changed, 612 insertions(+), 10 deletions(-)
diff --git a/sys/conf/files b/sys/conf/files
index ae83722eaca5..1ec165537128 100644
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -3143,6 +3143,7 @@ dev/sound/midi/mpu_if.m optional sound
dev/sound/midi/mpufoi_if.m optional sound
dev/sound/midi/sequencer.c optional sound
dev/sound/midi/synth_if.m optional sound
+dev/spibus/acpi_spibus.c optional acpi spibus
dev/spibus/ofw_spibus.c optional fdt spibus
dev/spibus/spibus.c optional spibus \
dependency "spibus_if.h"
diff --git a/sys/dev/spibus/acpi_spibus.c b/sys/dev/spibus/acpi_spibus.c
new file mode 100644
index 000000000000..c7b897937eea
--- /dev/null
+++ b/sys/dev/spibus/acpi_spibus.c
@@ -0,0 +1,580 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2023 Vladimir Kondratyev <wulf@FreeBSD.org>
+ *
+ * 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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/param.h>
+#include <sys/bus.h>
+#include <sys/endian.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/module.h>
+#include <sys/rman.h>
+#include <sys/sbuf.h>
+#include <sys/systm.h>
+
+#include <machine/resource.h>
+
+#include <contrib/dev/acpica/include/acpi.h>
+#include <contrib/dev/acpica/include/accommon.h>
+#include <contrib/dev/acpica/include/amlcode.h>
+#include <dev/acpica/acpivar.h>
+
+#include <dev/spibus/spibusvar.h>
+
+/*
+ * Make a copy of ACPI_RESOURCE_SPI_SERIALBUS type and replace "pointer to ACPI
+ * object name string" field with pointer to ACPI object itself.
+ * This saves us extra strdup()/free() pair on acpi_spibus_get_acpi_res call.
+ */
+typedef ACPI_RESOURCE_SPI_SERIALBUS ACPI_SPIBUS_RESOURCE_SPI_SERIALBUS;
+#define ResourceSource_Handle ResourceSource.StringPtr
+
+/* Hooks for the ACPI CA debugging infrastructure. */
+#define _COMPONENT ACPI_BUS
+ACPI_MODULE_NAME("SPI")
+
+#if defined (__amd64__) || defined (__i386__)
+static bool is_apple;
+#endif
+
+struct acpi_spibus_ivar {
+ struct spibus_ivar super_ivar;
+ ACPI_HANDLE handle;
+};
+
+static inline bool
+acpi_resource_is_spi_serialbus(ACPI_RESOURCE *res)
+{
+ return (res->Type == ACPI_RESOURCE_TYPE_SERIAL_BUS &&
+ res->Data.CommonSerialBus.Type == ACPI_RESOURCE_SERIAL_TYPE_SPI);
+}
+
+static ACPI_STATUS
+acpi_spibus_get_acpi_res_cb(ACPI_RESOURCE *res, void *context)
+{
+ ACPI_SPIBUS_RESOURCE_SPI_SERIALBUS *sb = context;
+ ACPI_STATUS status;
+ ACPI_HANDLE handle;
+
+ if (acpi_resource_is_spi_serialbus(res)) {
+ status = AcpiGetHandle(ACPI_ROOT_OBJECT,
+ res->Data.SpiSerialBus.ResourceSource.StringPtr, &handle);
+ if (ACPI_FAILURE(status))
+ return (status);
+ memcpy(sb, &res->Data.SpiSerialBus,
+ sizeof(ACPI_SPIBUS_RESOURCE_SPI_SERIALBUS));
+ /*
+ * replace "pointer to ACPI object name string" field
+ * with pointer to ACPI object itself.
+ */
+ sb->ResourceSource_Handle = handle;
+ return (AE_CTRL_TERMINATE);
+ } else if (res->Type == ACPI_RESOURCE_TYPE_END_TAG)
+ return (AE_NOT_FOUND);
+
+ return (AE_OK);
+}
+
+static void
+acpi_spibus_dump_res(device_t dev, ACPI_SPIBUS_RESOURCE_SPI_SERIALBUS *sb)
+{
+ device_printf(dev, "found ACPI child\n");
+ printf(" DeviceSelection: 0x%04hx\n", sb->DeviceSelection);
+ printf(" ConnectionSpeed: %uHz\n", sb->ConnectionSpeed);
+ printf(" WireMode: %s\n",
+ sb->WireMode == ACPI_SPI_4WIRE_MODE ?
+ "FourWireMode" : "ThreeWireMode");
+ printf(" DevicePolarity: %s\n",
+ sb->DevicePolarity == ACPI_SPI_ACTIVE_LOW ?
+ "PolarityLow" : "PolarityHigh");
+ printf(" DataBitLength: %uBit\n", sb->DataBitLength);
+ printf(" ClockPhase: %s\n",
+ sb->ClockPhase == ACPI_SPI_FIRST_PHASE ?
+ "ClockPhaseFirst" : "ClockPhaseSecond");
+ printf(" ClockPolarity: %s\n",
+ sb->ClockPolarity == ACPI_SPI_START_LOW ?
+ "ClockPolarityLow" : "ClockPolarityHigh");
+ printf(" SlaveMode: %s\n",
+ sb->SlaveMode == ACPI_CONTROLLER_INITIATED ?
+ "ControllerInitiated" : "DeviceInitiated");
+ printf(" ConnectionSharing: %s\n", sb->ConnectionSharing == 0 ?
+ "Exclusive" : "Shared");
+}
+
+static int
+acpi_spibus_get_acpi_res(device_t spibus, ACPI_HANDLE dev,
+ struct spibus_ivar *res)
+{
+ ACPI_SPIBUS_RESOURCE_SPI_SERIALBUS sb;
+
+ /*
+ * Read "SPI Serial Bus Connection Resource Descriptor"
+ * described in p.19.6.126 of ACPI specification.
+ */
+ bzero(&sb, sizeof(ACPI_SPIBUS_RESOURCE_SPI_SERIALBUS));
+ if (ACPI_FAILURE(AcpiWalkResources(dev, "_CRS",
+ acpi_spibus_get_acpi_res_cb, &sb)))
+ return (ENXIO);
+ if (sb.ResourceSource_Handle !=
+ acpi_get_handle(device_get_parent(spibus)))
+ return (ENXIO);
+ if (bootverbose)
+ acpi_spibus_dump_res(spibus, &sb);
+ /*
+ * The Windows Baytrail and Braswell SPI host controller
+ * drivers uses 1 as the first (and only) value for ACPI
+ * DeviceSelection.
+ */
+ if (sb.DeviceSelection != 0 &&
+ (acpi_MatchHid(sb.ResourceSource_Handle, "80860F0E") ||
+ acpi_MatchHid(sb.ResourceSource_Handle, "8086228E")))
+ res->cs = sb.DeviceSelection - 1;
+ else
+ res->cs = sb.DeviceSelection;
+ res->mode =
+ (sb.ClockPhase != ACPI_SPI_FIRST_PHASE ? SPIBUS_MODE_CPHA : 0) |
+ (sb.ClockPolarity != ACPI_SPI_START_LOW ? SPIBUS_MODE_CPOL : 0);
+ res->clock = sb.ConnectionSpeed;
+
+ return (0);
+}
+
+#if defined (__amd64__) || defined (__i386__)
+static int
+acpi_spibus_get_apple_res(device_t spibus, ACPI_HANDLE dev,
+ struct spibus_ivar *ivar)
+{
+ /* a0b5b7c6-1318-441c-b0c9-fe695eaf949b */
+ static const uint8_t apple_guid[ACPI_UUID_LENGTH] = {
+ 0xC6, 0xB7, 0xB5, 0xA0, 0x18, 0x13, 0x1C, 0x44,
+ 0xB0, 0xC9, 0xFE, 0x69, 0x5E, 0xAF, 0x94, 0x9B,
+ };
+ ACPI_BUFFER buf;
+ ACPI_OBJECT *pkg, *comp;
+ ACPI_HANDLE parent;
+ char *k;
+ uint64_t val;
+
+ /* Apple does not use _CRS but nested devices for SPI slaves */
+ if (ACPI_FAILURE(AcpiGetParent(dev, &parent)))
+ return (ENXIO);
+ if (parent != acpi_get_handle(device_get_parent(spibus)))
+ return (ENXIO);
+ if (ACPI_FAILURE(acpi_EvaluateDSMTyped(dev, apple_guid,
+ 1, 1, NULL, &buf, ACPI_TYPE_PACKAGE)))
+ return (ENXIO);
+
+ pkg = ((ACPI_OBJECT *)buf.Pointer);
+ if (pkg->Package.Count % 2 != 0) {
+ device_printf(spibus, "_DSM length %d not even\n",
+ pkg->Package.Count);
+ AcpiOsFree(pkg);
+ return (ENXIO);
+ }
+
+ if (bootverbose)
+ device_printf(spibus, "found ACPI child\n");
+
+ for (comp = pkg->Package.Elements;
+ comp < pkg->Package.Elements + pkg->Package.Count;
+ comp += 2) {
+
+ if (comp[0].Type != ACPI_TYPE_STRING ||
+ comp[1].Type != ACPI_TYPE_BUFFER) {
+ device_printf(spibus, "expected string+buffer, "
+ "got %d+%d\n", comp[0].Type, comp[1].Type);
+ continue;
+ }
+ k = comp[0].String.Pointer;
+ val = comp[1].Buffer.Length >= 8 ?
+ *(uint64_t *)comp[1].Buffer.Pointer : 0;
+
+ if (bootverbose)
+ printf(" %s: %zu\n", k, (intmax_t)val);
+
+ if (strcmp(k, "spiSclkPeriod") == 0) {
+ if (val != 0)
+ ivar->clock = 1000000000 / val;
+ } else if (strcmp(k, "spiSPO") == 0) {
+ if (val != 0)
+ ivar->mode |= SPIBUS_MODE_CPOL;
+ } else if (strcmp(k, "spiSPH") == 0) {
+ if (val != 0)
+ ivar->mode |= SPIBUS_MODE_CPHA;
+ } else if (strcmp(k, "spiCSDelay") == 0) {
+ ivar->cs_delay = val;
+ }
+ }
+
+ AcpiOsFree(pkg);
+
+ return (0);
+}
+#endif
+
+static int
+acpi_spibus_delete_acpi_child(ACPI_HANDLE handle)
+{
+ device_t acpi_child, acpi0;
+
+ /* Delete existing child of acpi bus */
+ acpi_child = acpi_get_device(handle);
+ if (acpi_child != NULL) {
+ acpi0 = devclass_get_device(devclass_find("acpi"), 0);
+ if (device_get_parent(acpi_child) != acpi0)
+ return (ENXIO);
+
+ if (device_is_attached(acpi_child))
+ return (ENXIO);
+
+ if (device_delete_child(acpi0, acpi_child) != 0)
+ return (ENXIO);
+ }
+
+ return (0);
+}
+
+static device_t
+acpi_spibus_add_child(device_t dev, u_int order, const char *name, int unit)
+{
+ return (spibus_add_child_common(
+ dev, order, name, unit, sizeof(struct acpi_spibus_ivar)));
+}
+
+static ACPI_STATUS
+acpi_spibus_enumerate_child(ACPI_HANDLE handle, UINT32 level,
+ void *context, void **result)
+{
+ device_t spibus, child;
+ struct spibus_ivar res;
+ ACPI_STATUS status;
+ UINT32 sta;
+ bool found = false;
+
+ spibus = context;
+
+ /*
+ * If no _STA method or if it failed, then assume that
+ * the device is present.
+ */
+ if (!ACPI_FAILURE(acpi_GetInteger(handle, "_STA", &sta)) &&
+ !ACPI_DEVICE_PRESENT(sta))
+ return (AE_OK);
+
+ if (!acpi_has_hid(handle))
+ return (AE_OK);
+
+ bzero(&res, sizeof(res));
+ if (acpi_spibus_get_acpi_res(spibus, handle, &res) == 0)
+ found = true;
+#if defined (__amd64__) || defined (__i386__)
+ if (!found && is_apple &&
+ acpi_spibus_get_apple_res(spibus, handle, &res) == 0)
+ found = true;
+#endif
+ if (!found || res.clock == 0)
+ return (AE_OK);
+
+ /* Delete existing child of acpi bus */
+ if (acpi_spibus_delete_acpi_child(handle) != 0)
+ return (AE_OK);
+
+ child = BUS_ADD_CHILD(spibus, 0, NULL, -1);
+ if (child == NULL) {
+ device_printf(spibus, "add child failed\n");
+ return (AE_OK);
+ }
+
+ spibus_set_cs(child, res.cs);
+ spibus_set_mode(child, res.mode);
+ spibus_set_clock(child, res.clock);
+ spibus_set_cs_delay(child, res.cs_delay);
+ acpi_set_handle(child, handle);
+ acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL);
+
+ /*
+ * Update ACPI-CA to use the IIC enumerated device_t for this handle.
+ */
+ status = AcpiAttachData(handle, acpi_fake_objhandler, child);
+ if (ACPI_FAILURE(status))
+ printf("WARNING: Unable to attach object data to %s - %s\n",
+ acpi_name(handle), AcpiFormatException(status));
+
+ return (AE_OK);
+}
+
+static ACPI_STATUS
+acpi_spibus_enumerate_children(device_t dev)
+{
+ return (AcpiWalkNamespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
+ ACPI_UINT32_MAX, acpi_spibus_enumerate_child, NULL, dev, NULL));
+}
+
+static void
+acpi_spibus_set_power_children(device_t dev, int state, bool all_children)
+{
+ device_t *devlist;
+ int i, numdevs;
+
+ if (device_get_children(dev, &devlist, &numdevs) != 0)
+ return;
+
+ for (i = 0; i < numdevs; i++)
+ if (all_children || device_is_attached(devlist[i]) != 0)
+ acpi_set_powerstate(devlist[i], state);
+
+ free(devlist, M_TEMP);
+}
+
+static int
+acpi_spibus_probe(device_t dev)
+{
+ ACPI_HANDLE handle;
+ device_t controller;
+
+ if (acpi_disabled("spibus"))
+ return (ENXIO);
+
+ controller = device_get_parent(dev);
+ if (controller == NULL)
+ return (ENXIO);
+
+ handle = acpi_get_handle(controller);
+ if (handle == NULL)
+ return (ENXIO);
+
+ device_set_desc(dev, "SPI bus (ACPI-hinted)");
+ return (BUS_PROBE_DEFAULT + 1);
+}
+
+static int
+acpi_spibus_attach(device_t dev)
+{
+
+#if defined (__amd64__) || defined (__i386__)
+ char *vendor = kern_getenv("smbios.bios.vendor");
+ if (vendor != NULL &&
+ (strcmp(vendor, "Apple Inc.") == 0 ||
+ strcmp(vendor, "Apple Computer, Inc.") == 0))
+ is_apple = true;
+#endif
+
+ if (ACPI_FAILURE(acpi_spibus_enumerate_children(dev)))
+ device_printf(dev, "children enumeration failed\n");
+
+ acpi_spibus_set_power_children(dev, ACPI_STATE_D0, true);
+ return (spibus_attach(dev));
+}
+
+static int
+acpi_spibus_detach(device_t dev)
+{
+ acpi_spibus_set_power_children(dev, ACPI_STATE_D3, false);
+
+ return (spibus_detach(dev));
+}
+
+static int
+acpi_spibus_suspend(device_t dev)
+{
+ acpi_spibus_set_power_children(dev, ACPI_STATE_D3, false);
+
+ return (bus_generic_suspend(dev));
+}
+
+static int
+acpi_spibus_resume(device_t dev)
+{
+ acpi_spibus_set_power_children(dev, ACPI_STATE_D0, false);
+
+ return (bus_generic_resume(dev));
+}
+
+#ifndef INTRNG
+/* Mostly copy of acpi_alloc_resource() */
+static struct resource *
+acpi_spibus_alloc_resource(device_t dev, device_t child, int type, int *rid,
+ rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
+{
+ ACPI_RESOURCE ares;
+ struct resource_list *rl;
+ struct resource *res;
+
+ if (device_get_parent(child) != dev)
+ return (BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
+ type, rid, start, end, count, flags));
+
+ rl = BUS_GET_RESOURCE_LIST(dev, child);
+ if (rl == NULL)
+ return (NULL);
+
+ res = resource_list_alloc(rl, dev, child, type, rid,
+ start, end, count, flags);
+ if (res != NULL && type == SYS_RES_IRQ &&
+ ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares)))
+ acpi_config_intr(child, &ares);
+
+ return (res);
+}
+#endif
+
+/*
+ * If this device is an ACPI child but no one claimed it, attempt
+ * to power it off. We'll power it back up when a driver is added.
+ */
+static void
+acpi_spibus_probe_nomatch(device_t bus, device_t child)
+{
+ spibus_probe_nomatch(bus, child);
+ acpi_set_powerstate(child, ACPI_STATE_D3);
+}
+
+/*
+ * If a new driver has a chance to probe a child, first power it up.
+ */
+static void
+acpi_spibus_driver_added(device_t dev, driver_t *driver)
+{
+ device_t child, *devlist;
+ int i, numdevs;
+
+ DEVICE_IDENTIFY(driver, dev);
+ if (device_get_children(dev, &devlist, &numdevs) != 0)
+ return;
+
+ for (i = 0; i < numdevs; i++) {
+ child = devlist[i];
+ if (device_get_state(child) == DS_NOTPRESENT) {
+ acpi_set_powerstate(child, ACPI_STATE_D0);
+ if (device_probe_and_attach(child) != 0)
+ acpi_set_powerstate(child, ACPI_STATE_D3);
+ }
+ }
+ free(devlist, M_TEMP);
+}
+
+static void
+acpi_spibus_child_deleted(device_t bus, device_t child)
+{
+ struct acpi_spibus_ivar *devi = device_get_ivars(child);
+
+ if (acpi_get_device(devi->handle) == child)
+ AcpiDetachData(devi->handle, acpi_fake_objhandler);
+}
+
+static int
+acpi_spibus_read_ivar(device_t bus, device_t child, int which, uintptr_t *res)
+{
+ struct acpi_spibus_ivar *devi = device_get_ivars(child);
+
+ switch (which) {
+ case ACPI_IVAR_HANDLE:
+ *res = (uintptr_t)devi->handle;
+ break;
+ default:
+ return (spibus_read_ivar(bus, child, which, res));
+ }
+
+ return (0);
+}
+
+static int
+acpi_spibus_write_ivar(device_t bus, device_t child, int which, uintptr_t val)
+{
+ struct acpi_spibus_ivar *devi = device_get_ivars(child);
+
+ switch (which) {
+ case ACPI_IVAR_HANDLE:
+ if (devi->handle != NULL)
+ return (EINVAL);
+ devi->handle = (ACPI_HANDLE)val;
+ break;
+ default:
+ return (spibus_write_ivar(bus, child, which, val));
+ }
+
+ return (0);
+}
+
+/* Location hint for devctl(8). Concatenate IIC and ACPI hints. */
+static int
+acpi_spibus_child_location(device_t bus, device_t child, struct sbuf *sb)
+{
+ struct acpi_spibus_ivar *devi = device_get_ivars(child);
+ int error;
+
+ /* read SPI location hint string into the buffer. */
+ error = spibus_child_location(bus, child, sb);
+ if (error != 0)
+ return (error);
+
+ /* Place ACPI string right after IIC one's terminating NUL. */
+ if (devi->handle != NULL)
+ sbuf_printf(sb, " handle=%s", acpi_name(devi->handle));
+
+ return (0);
+}
+
+/* PnP information for devctl(8). */
+static int
+acpi_spibus_child_pnpinfo(device_t bus, device_t child, struct sbuf *sb)
+{
+ struct acpi_spibus_ivar *devi = device_get_ivars(child);
+
+ return (
+ devi->handle == NULL ? ENOTSUP : acpi_pnpinfo(devi->handle, sb));
+}
+
+static device_method_t acpi_spibus_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, acpi_spibus_probe),
+ DEVMETHOD(device_attach, acpi_spibus_attach),
+ DEVMETHOD(device_detach, acpi_spibus_detach),
+ DEVMETHOD(device_suspend, acpi_spibus_suspend),
+ DEVMETHOD(device_resume, acpi_spibus_resume),
+
+ /* Bus interface */
+#ifndef INTRNG
+ DEVMETHOD(bus_alloc_resource, acpi_spibus_alloc_resource),
+#endif
+ DEVMETHOD(bus_add_child, acpi_spibus_add_child),
+ DEVMETHOD(bus_probe_nomatch, acpi_spibus_probe_nomatch),
+ DEVMETHOD(bus_driver_added, acpi_spibus_driver_added),
+ DEVMETHOD(bus_child_deleted, acpi_spibus_child_deleted),
+ DEVMETHOD(bus_read_ivar, acpi_spibus_read_ivar),
+ DEVMETHOD(bus_write_ivar, acpi_spibus_write_ivar),
+ DEVMETHOD(bus_child_location, acpi_spibus_child_location),
+ DEVMETHOD(bus_child_pnpinfo, acpi_spibus_child_pnpinfo),
+ DEVMETHOD(bus_get_device_path, acpi_get_acpi_device_path),
+
+ DEVMETHOD_END,
+};
+
+DEFINE_CLASS_1(spibus, acpi_spibus_driver, acpi_spibus_methods,
+ sizeof(struct spibus_softc), spibus_driver);
+DRIVER_MODULE(acpi_spibus, spi, acpi_spibus_driver, NULL, NULL);
+MODULE_VERSION(acpi_spibus, 1);
+MODULE_DEPEND(acpi_spibus, acpi, 1, 1, 1);
diff --git a/sys/dev/spibus/spibus.c b/sys/dev/spibus/spibus.c
index af4b1402cee4..96c4cd7283e9 100644
--- a/sys/dev/spibus/spibus.c
+++ b/sys/dev/spibus/spibus.c
@@ -53,7 +53,7 @@ spibus_probe(device_t dev)
return (BUS_PROBE_DEFAULT);
}
-static int
+int
spibus_attach(device_t dev)
{
struct spibus_softc *sc = SPIBUS_SOFTC(dev);
@@ -67,7 +67,7 @@ spibus_attach(device_t dev)
* Since this is not a self-enumerating bus, and since we always add
* children in attach, we have to always delete children here.
*/
-static int
+int
spibus_detach(device_t dev)
{
return (device_delete_children(dev));
@@ -102,7 +102,7 @@ spibus_print_child(device_t dev, device_t child)
return (retval);
}
-static void
+void
spibus_probe_nomatch(device_t bus, device_t child)
{
struct spibus_ivar *devi = SPIBUS_IVAR(child);
@@ -112,7 +112,7 @@ spibus_probe_nomatch(device_t bus, device_t child)
return;
}
-static int
+int
spibus_child_location(device_t bus, device_t child, struct sbuf *sb)
{
struct spibus_ivar *devi = SPIBUS_IVAR(child);
@@ -123,7 +123,7 @@ spibus_child_location(device_t bus, device_t child, struct sbuf *sb)
return (0);
}
-static int
+int
spibus_read_ivar(device_t bus, device_t child, int which, uintptr_t *result)
{
struct spibus_ivar *devi = SPIBUS_IVAR(child);
@@ -147,7 +147,7 @@ spibus_read_ivar(device_t bus, device_t child, int which, uintptr_t *result)
return (0);
}
-static int
+int
spibus_write_ivar(device_t bus, device_t child, int which, uintptr_t value)
{
struct spibus_ivar *devi = SPIBUS_IVAR(child);
@@ -181,8 +181,9 @@ spibus_write_ivar(device_t bus, device_t child, int which, uintptr_t value)
return (0);
}
-static device_t
-spibus_add_child(device_t dev, u_int order, const char *name, int unit)
+device_t
+spibus_add_child_common(device_t dev, u_int order, const char *name, int unit,
+ size_t ivars_size)
{
device_t child;
struct spibus_ivar *devi;
@@ -190,7 +191,7 @@ spibus_add_child(device_t dev, u_int order, const char *name, int unit)
child = device_add_child_ordered(dev, order, name, unit);
if (child == NULL)
return (child);
- devi = malloc(sizeof(struct spibus_ivar), M_DEVBUF, M_NOWAIT | M_ZERO);
+ devi = malloc(ivars_size, M_DEVBUF, M_NOWAIT | M_ZERO);
if (devi == NULL) {
device_delete_child(dev, child);
return (0);
@@ -200,6 +201,13 @@ spibus_add_child(device_t dev, u_int order, const char *name, int unit)
return (child);
}
+static device_t
+spibus_add_child(device_t dev, u_int order, const char *name, int unit)
+{
+ return (spibus_add_child_common(
+ dev, order, name, unit, sizeof(struct spibus_ivar)));
+}
+
static void
spibus_hinted_child(device_t bus, const char *dname, int dunit)
{
diff --git a/sys/dev/spibus/spibusvar.h b/sys/dev/spibus/spibusvar.h
index db94d30831e6..8c5c122750db 100644
--- a/sys/dev/spibus/spibusvar.h
+++ b/sys/dev/spibus/spibusvar.h
@@ -73,7 +73,15 @@ spibus_set_ ## A(device_t dev, T t) \
SPIBUS_ACCESSOR(cs, CS, uint32_t)
SPIBUS_ACCESSOR(mode, MODE, uint32_t)
SPIBUS_ACCESSOR(clock, CLOCK, uint32_t)
-SPIBUS_ACCESSOR(cs_delay, CS_DELAY, uint32_t)
+SPIBUS_ACCESSOR(cs_delay, CS_DELAY, uint32_t)
extern driver_t spibus_driver;
extern driver_t ofw_spibus_driver;
+
+int spibus_attach(device_t);
+int spibus_detach(device_t);
+device_t spibus_add_child_common(device_t, u_int, const char *, int, size_t);
+void spibus_probe_nomatch(device_t, device_t);
+int spibus_child_location(device_t, device_t, struct sbuf *);
+int spibus_read_ivar(device_t, device_t, int, uintptr_t *);
+int spibus_write_ivar(device_t, device_t, int, uintptr_t);
diff --git a/sys/modules/spi/spibus/Makefile b/sys/modules/spi/spibus/Makefile
index 01386d39e118..7ba80d50e0ff 100644
--- a/sys/modules/spi/spibus/Makefile
+++ b/sys/modules/spi/spibus/Makefile
@@ -9,6 +9,11 @@ SRCS= spibus.c
SRCS+= ofw_spibus.c ofw_bus_if.h
.endif
+.if ${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "amd64" || \
+ ${MACHINE_CPUARCH} == "i386"
+SRCS+= acpi_spibus.c opt_acpi.h acpi_if.h
+.endif
+
# Generated files...
SRCS+= \
bus_if.h \