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[src/trunk]: src/sys/dev/acpi Implement a ACPI helper to fill the property ar...
details: https://anonhg.NetBSD.org/src/rev/5e5e5bc97bd6
branches: trunk
changeset: 828379:5e5e5bc97bd6
user: bouyer <bouyer%NetBSD.org@localhost>
date: Sun Dec 10 16:51:30 2017 +0000
description:
Implement a ACPI helper to fill the property array expected from our I2C
framework from the ACPI tables.
Also implement acpi_intr_establish(), acpi_intr_disestablish() and
acpi_intr_string().
Needed for the upcoming HID over I2C support, proposed on tech-kern@
on Dec, 1.
diffstat:
sys/dev/acpi/acpi_i2c.c | 236 +++++++++++++++++++++++++++++++++++++++++++++++
sys/dev/acpi/acpi_i2c.h | 38 +++++++
sys/dev/acpi/acpi_intr.h | 34 ++++++
sys/dev/acpi/acpi_util.c | 66 ++++++++++++-
sys/dev/acpi/files.acpi | 3 +-
5 files changed, 374 insertions(+), 3 deletions(-)
diffs (truncated from 426 to 300 lines):
diff -r 30fa5bd69c77 -r 5e5e5bc97bd6 sys/dev/acpi/acpi_i2c.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/acpi/acpi_i2c.c Sun Dec 10 16:51:30 2017 +0000
@@ -0,0 +1,236 @@
+/* $NetBSD: acpi_i2c.c,v 1.1 2017/12/10 16:51:30 bouyer Exp $ */
+
+/*-
+ * Copyright (c) 2017 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Manuel Bouyer.
+ *
+ * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: acpi_i2c.c,v 1.1 2017/12/10 16:51:30 bouyer Exp $");
+
+#include <dev/acpi/acpireg.h>
+#include <dev/acpi/acpivar.h>
+#include <dev/acpi/acpi_i2c.h>
+
+static void
+acpi_enter_i2c_hid(struct acpi_devnode *devnode, prop_dictionary_t dev)
+{
+ ACPI_OBJECT_LIST arg;
+ ACPI_OBJECT obj[4];
+ ACPI_OBJECT *osc;
+ ACPI_BUFFER buf;
+ ACPI_STATUS rv;
+ /* 3cdff6f7-4267-4555-ad05-b30a3d8938de */
+ static uint8_t i2c_hid_guid[] = {
+ 0xF7, 0xF6, 0xDF, 0x3C, 0x67, 0x42, 0x55, 0x45,
+ 0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE,
+ };
+
+ arg.Count = 4;
+ arg.Pointer = obj;
+
+ obj[0].Type = ACPI_TYPE_BUFFER;
+ obj[0].Buffer.Length = sizeof(i2c_hid_guid);
+ obj[0].Buffer.Pointer = i2c_hid_guid;
+
+ /* rev */
+ obj[1].Type = ACPI_TYPE_INTEGER;
+ obj[1].Integer.Value = 1;
+
+ /* func */
+ obj[2].Type = ACPI_TYPE_INTEGER;
+ obj[2].Integer.Value = 1;
+
+ obj[3].Type = ACPI_TYPE_ANY;
+ obj[3].Buffer.Length = 0;
+
+ buf.Pointer = NULL;
+ buf.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
+
+ rv = AcpiEvaluateObject(devnode->ad_handle, "_DSM", &arg, &buf);
+
+ if (ACPI_FAILURE(rv)) {
+ aprint_error("failed to evaluate _DSM for %s: %s\n",
+ devnode->ad_name, AcpiFormatException(rv));
+ return;
+ }
+
+ osc = buf.Pointer;
+ if (osc->Type != ACPI_TYPE_INTEGER) {
+ aprint_error("bad _DSM return type %d for %s\n",
+ osc->Type, devnode->ad_name);
+ return;
+ }
+ prop_dictionary_set_uint32(dev, "hid-descr-addr", osc->Integer.Value);
+}
+
+struct acpi_i2c_id {
+ const char *id;
+ const char *compat;
+ const int compatlen;
+ void (*parse)(struct acpi_devnode *, prop_dictionary_t);
+};
+
+static const struct acpi_i2c_id acpi_i2c_ids[] = {
+ {
+ .id = "PNP0C50",
+ .compat = "hid-over-i2c",
+ .compatlen = 13,
+ .parse = acpi_enter_i2c_hid
+ },
+ {
+ .id = "ACPI0C50",
+ .compat = "hid-over-i2c",
+ .compatlen = 13,
+ .parse = acpi_enter_i2c_hid
+ },
+ {
+ .id = NULL,
+ .compat = NULL,
+ .compatlen = 0,
+ .parse = NULL
+ }
+};
+
+static const struct acpi_i2c_id *
+acpi_i2c_search(const char *name)
+{
+ int i;
+ for (i = 0; acpi_i2c_ids[i].id != NULL; i++) {
+ if (strcmp(name, acpi_i2c_ids[i].id) == 0)
+ return &acpi_i2c_ids[i];
+ }
+ return NULL;
+}
+
+struct acpi_i2c_context {
+ uint16_t i2c_addr;
+};
+
+static ACPI_STATUS
+acpi_i2c_resource_parse_callback(ACPI_RESOURCE *res, void *context)
+{
+ struct acpi_i2c_context *i2cc = context;
+
+ switch (res->Type) {
+ case ACPI_RESOURCE_TYPE_END_TAG:
+ break;
+ case ACPI_RESOURCE_TYPE_SERIAL_BUS:
+ switch (res->Data.I2cSerialBus.Type) {
+ case ACPI_RESOURCE_SERIAL_TYPE_I2C:
+ i2cc->i2c_addr = res->Data.I2cSerialBus.SlaveAddress;
+ break;
+ }
+ break;
+ case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
+ break;
+ default:
+ printf("ressource type 0x%x ignored\n", res->Type);
+ }
+ return_ACPI_STATUS(AE_OK);
+}
+
+static void
+acpi_enter_i2c_device(struct acpi_devnode *ad, prop_array_t array)
+{
+ prop_dictionary_t dev;
+ struct acpi_i2c_context i2cc;
+ ACPI_STATUS rv;
+ int cidi;
+ ACPI_PNP_DEVICE_ID_LIST *idlist;
+ const char *name;
+ static const struct acpi_i2c_id *i2c_id;
+
+ memset(&i2cc, 0, sizeof(i2cc));
+ rv = AcpiWalkResources(ad->ad_handle, "_CRS",
+ acpi_i2c_resource_parse_callback, &i2cc);
+ if (ACPI_FAILURE(rv)) {
+ aprint_error("ACPI: unable to get resources "
+ "for %s: %s\n", ad->ad_name,
+ AcpiFormatException(rv));
+ return;
+ }
+ if (i2cc.i2c_addr == 0)
+ return;
+ dev = prop_dictionary_create();
+ if (dev == NULL) {
+ aprint_error("ignoring device %s (no memory)\n",
+ ad->ad_name);
+ return;
+ }
+ if ((ad->ad_devinfo->Valid & ACPI_VALID_HID) == 0)
+ name = ad->ad_name;
+ else
+ name = ad->ad_devinfo->HardwareId.String;
+ prop_dictionary_set_cstring(dev, "name", name);
+ prop_dictionary_set_uint32(dev, "addr", i2cc.i2c_addr);
+ prop_dictionary_set_uint64(dev, "cookie", (uintptr_t)ad->ad_handle);
+ /* first search by name, then by CID */
+ i2c_id = acpi_i2c_search(name);
+ idlist = &ad->ad_devinfo->CompatibleIdList;
+ for (cidi = 0;
+ cidi < idlist->Count && i2c_id == NULL;
+ cidi++) {
+ i2c_id = acpi_i2c_search(idlist->Ids[cidi].String);
+ }
+ if (i2c_id != NULL) {
+ if (i2c_id->compat != NULL) {
+ prop_data_t data;
+ data = prop_data_create_data(i2c_id->compat,
+ i2c_id->compatlen);
+ prop_dictionary_set(dev, "compatible", data);
+ prop_object_release(data);
+ }
+ if (i2c_id->parse != NULL)
+ i2c_id->parse(ad, dev);
+ }
+ prop_array_add(array, dev);
+ prop_object_release(dev);
+}
+
+
+prop_array_t
+acpi_enter_i2c_devs(struct acpi_devnode *devnode)
+{
+ struct acpi_devnode *ad;
+ prop_array_t array = prop_array_create();
+
+ if (array == NULL)
+ return NULL;
+
+ SIMPLEQ_FOREACH(ad, &devnode->ad_child_head, ad_child_list) {
+ if ((ad->ad_devinfo->Valid & ACPI_VALID_STA) == 0)
+ continue;
+ if ((ad->ad_devinfo->CurrentStatus & ACPI_STA_OK) !=
+ ACPI_STA_OK)
+ continue;
+ if (ad->ad_devinfo->Type != ACPI_TYPE_DEVICE)
+ continue;
+ acpi_enter_i2c_device(ad, array);
+ }
+ return array;
+}
diff -r 30fa5bd69c77 -r 5e5e5bc97bd6 sys/dev/acpi/acpi_i2c.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/acpi/acpi_i2c.h Sun Dec 10 16:51:30 2017 +0000
@@ -0,0 +1,38 @@
+/* $NetBSD: acpi_i2c.h,v 1.1 2017/12/10 16:51:30 bouyer Exp $ */
+
+/*-
+ * Copyright (c) 2017 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Manuel Bouyer.
+ *
+ * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+
+
+#ifndef _SYS_DEV_ACPI_ACPI_I2C_H
+#define _SYS_DEV_ACPI_ACPI_I2C_H
+#include <prop/proplib.h>
+
+prop_array_t acpi_enter_i2c_devs(struct acpi_devnode *);
+#endif /* _SYS_DEV_ACPI_ACPI_I2C_H */
diff -r 30fa5bd69c77 -r 5e5e5bc97bd6 sys/dev/acpi/acpi_intr.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/acpi/acpi_intr.h Sun Dec 10 16:51:30 2017 +0000
@@ -0,0 +1,34 @@
+/* $NetBSD: acpi_intr.h,v 1.1 2017/12/10 16:51:30 bouyer Exp $ */
+
+/*-
+ * Copyright (c) 2017 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Manuel Bouyer.
+ *
+ * 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.
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