Module Name: src
Committed By: jmcneill
Date: Wed Oct 17 00:03:47 UTC 2018
Modified Files:
src/sys/dev/acpi: files.acpi
Added Files:
src/sys/dev/acpi: dwiic_acpi.c
Log Message:
Add ACPI glue for DesignWare I2C controller.
To generate a diff of this commit:
cvs rdiff -u -r0 -r1.1 src/sys/dev/acpi/dwiic_acpi.c
cvs rdiff -u -r1.106 -r1.107 src/sys/dev/acpi/files.acpi
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/dev/acpi/files.acpi
diff -u src/sys/dev/acpi/files.acpi:1.106 src/sys/dev/acpi/files.acpi:1.107
--- src/sys/dev/acpi/files.acpi:1.106 Tue Oct 16 10:25:33 2018
+++ src/sys/dev/acpi/files.acpi Wed Oct 17 00:03:47 2018
@@ -1,4 +1,4 @@
-# $NetBSD: files.acpi,v 1.106 2018/10/16 10:25:33 jmcneill Exp $
+# $NetBSD: files.acpi,v 1.107 2018/10/17 00:03:47 jmcneill Exp $
include "dev/acpi/acpica/files.acpica"
@@ -237,4 +237,8 @@ file dev/acpi/ahcisata_acpi.c ahcisata_a
attach plgpio at acpinodebus with plgpio_acpi
file dev/acpi/plgpio_acpi.c plgpio_acpi
+# DesignWare I2C controller
+attach dwiic at acpinodebus with dwiic_acpi
+file dev/acpi/dwiic_acpi.c dwiic_acpi
+
include "dev/acpi/wmi/files.wmi"
Added files:
Index: src/sys/dev/acpi/dwiic_acpi.c
diff -u /dev/null src/sys/dev/acpi/dwiic_acpi.c:1.1
--- /dev/null Wed Oct 17 00:03:47 2018
+++ src/sys/dev/acpi/dwiic_acpi.c Wed Oct 17 00:03:47 2018
@@ -0,0 +1,177 @@
+/* $NetBSD: dwiic_acpi.c,v 1.1 2018/10/17 00:03:47 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2018 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jared McNeill <jmcne...@invisible.ca>.
+ *
+ * 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: dwiic_acpi.c,v 1.1 2018/10/17 00:03:47 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/cpu.h>
+#include <sys/device.h>
+
+#include <dev/acpi/acpireg.h>
+#include <dev/acpi/acpivar.h>
+#include <dev/acpi/acpi_i2c.h>
+
+#include <dev/ic/dwiic_var.h>
+
+struct dwiic_acpi_param {
+ uint16_t hcnt;
+ uint16_t lcnt;
+ uint32_t ht;
+};
+
+static int dwiic_acpi_match(device_t, cfdata_t, void *);
+static void dwiic_acpi_attach(device_t, device_t, void *);
+
+static void dwiic_acpi_parse_param(struct dwiic_softc *, ACPI_HANDLE,
+ const char *, struct dwiic_acpi_param *);
+static void dwiic_acpi_configure(struct dwiic_softc *, ACPI_HANDLE);
+
+CFATTACH_DECL_NEW(dwiic_acpi, sizeof(struct dwiic_softc), dwiic_acpi_match, dwiic_acpi_attach, NULL, NULL);
+
+static const char * const compatible[] = {
+ "AMDI0510",
+ NULL
+};
+
+static int
+dwiic_acpi_match(device_t parent, cfdata_t cf, void *aux)
+{
+ struct acpi_attach_args *aa = aux;
+
+ if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
+ return 0;
+
+ return acpi_match_hid(aa->aa_node->ad_devinfo, compatible);
+}
+
+static void
+dwiic_acpi_attach(device_t parent, device_t self, void *aux)
+{
+ struct dwiic_softc * const sc = device_private(self);
+ struct acpi_attach_args *aa = aux;
+ struct acpi_resources res;
+ struct acpi_mem *mem;
+ struct acpi_irq *irq;
+ ACPI_STATUS rv;
+ int error;
+ void *ih;
+
+ sc->sc_dev = self;
+ sc->sc_type = dwiic_type_generic;
+ sc->sc_iot = aa->aa_memt;
+
+ rv = acpi_resource_parse(sc->sc_dev, aa->aa_node->ad_handle, "_CRS",
+ &res, &acpi_resource_parse_ops_default);
+ if (ACPI_FAILURE(rv))
+ return;
+
+ mem = acpi_res_mem(&res, 0);
+ if (mem == NULL) {
+ aprint_error_dev(self, "couldn't find mem resource\n");
+ goto done;
+ }
+
+ irq = acpi_res_irq(&res, 0);
+ if (irq == NULL) {
+ aprint_error_dev(self, "couldn't find irq resource\n");
+ goto done;
+ }
+
+ error = bus_space_map(sc->sc_iot, mem->ar_base, mem->ar_length, 0, &sc->sc_ioh);
+ if (error) {
+ aprint_error_dev(self, "couldn't map registers\n");
+ return;
+ }
+
+ const int type = (irq->ar_type == ACPI_EDGE_SENSITIVE) ? IST_EDGE : IST_LEVEL;
+ ih = intr_establish(irq->ar_irq, IPL_VM, type, dwiic_intr, sc);
+ if (ih == NULL) {
+ aprint_error_dev(self, "couldn't install interrupt handler\n");
+ bus_space_unmap(sc->sc_iot, sc->sc_ioh, mem->ar_length);
+ goto done;
+ }
+
+ dwiic_acpi_configure(sc, aa->aa_node->ad_handle);
+
+ sc->sc_iba.iba_child_devices = acpi_enter_i2c_devs(aa->aa_node);
+
+ dwiic_attach(sc);
+
+ config_found_ia(self, "i2cbus", &sc->sc_iba, iicbus_print);
+
+ pmf_device_register(self, dwiic_suspend, dwiic_resume);
+
+done:
+ acpi_resource_cleanup(&res);
+}
+
+static void
+dwiic_acpi_parse_param(struct dwiic_softc *sc, ACPI_HANDLE handle, const char *path,
+ struct dwiic_acpi_param *param)
+{
+ ACPI_BUFFER buf;
+ ACPI_OBJECT *obj;
+
+ memset(param, 0, sizeof(*param));
+
+ if (ACPI_FAILURE(acpi_eval_struct(handle, path, &buf)))
+ return;
+
+ obj = buf.Pointer;
+ if (obj->Type != ACPI_TYPE_PACKAGE || obj->Package.Count != 3)
+ goto done;
+
+ param->hcnt = (uint16_t)obj->Package.Elements[0].Integer.Value;
+ param->lcnt = (uint16_t)obj->Package.Elements[1].Integer.Value;
+ param->ht = (uint32_t)obj->Package.Elements[2].Integer.Value;
+
+done:
+ ACPI_FREE(buf.Pointer);
+}
+
+static void
+dwiic_acpi_configure(struct dwiic_softc *sc, ACPI_HANDLE handle)
+{
+ struct dwiic_acpi_param sscn, fmcn;
+
+ dwiic_acpi_parse_param(sc, handle, "SSCN", &sscn);
+ sc->ss_hcnt = sscn.hcnt;
+ sc->ss_lcnt = sscn.lcnt;
+
+ dwiic_acpi_parse_param(sc, handle, "FMCN", &fmcn);
+ sc->fs_hcnt = fmcn.hcnt;
+ sc->fs_lcnt = fmcn.lcnt;
+
+ /* XXX */
+ sc->sda_hold_time = fmcn.ht;
+}
