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[src/trunk]: src/sys/dev/acpi Add support for NXP Layerscape I2C controllers.
details: https://anonhg.NetBSD.org/src/rev/c8aad7e34770
branches: trunk
changeset: 950319:c8aad7e34770
user: jmcneill <jmcneill%NetBSD.org@localhost>
date: Sun Jan 24 18:02:51 2021 +0000
description:
Add support for NXP Layerscape I2C controllers.
diffstat:
sys/arch/evbarm/conf/GENERIC64 | 3 +-
sys/dev/acpi/files.acpi | 7 +-
sys/dev/acpi/nxpiic_acpi.c | 149 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 157 insertions(+), 2 deletions(-)
diffs (192 lines):
diff -r 1d4922123b7e -r c8aad7e34770 sys/arch/evbarm/conf/GENERIC64
--- a/sys/arch/evbarm/conf/GENERIC64 Sun Jan 24 18:01:13 2021 +0000
+++ b/sys/arch/evbarm/conf/GENERIC64 Sun Jan 24 18:02:51 2021 +0000
@@ -1,5 +1,5 @@
#
-# $NetBSD: GENERIC64,v 1.174 2021/01/21 17:46:28 nia Exp $
+# $NetBSD: GENERIC64,v 1.175 2021/01/24 18:02:51 jmcneill Exp $
#
# GENERIC ARM (aarch64) kernel
#
@@ -301,6 +301,7 @@
dwiic* at fdt? # Designware I2C
dwiic* at acpi?
imxi2c* at fdt? pass 4 # IMX I2C
+nxpiic* at acpi? # NXP Layerscape I2C
rkiic* at fdt? pass 4 # Rockchip I2C
sunxirsb* at fdt? pass 4 # Allwinner RSB
sunxitwi* at fdt? # Allwinner TWI
diff -r 1d4922123b7e -r c8aad7e34770 sys/dev/acpi/files.acpi
--- a/sys/dev/acpi/files.acpi Sun Jan 24 18:01:13 2021 +0000
+++ b/sys/dev/acpi/files.acpi Sun Jan 24 18:02:51 2021 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.acpi,v 1.119 2020/12/13 20:39:20 jmcneill Exp $
+# $NetBSD: files.acpi,v 1.120 2021/01/24 18:02:51 jmcneill Exp $
include "dev/acpi/acpica/files.acpica"
@@ -264,6 +264,11 @@
attach dwiic at acpinodebus with dwiic_acpi
file dev/acpi/dwiic_acpi.c dwiic_acpi
+# NXP Layerscape I2C controller
+device nxpiic: motoi2c, i2cbus, i2cexec
+attach nxpiic at acpinodebus with nxpiic_acpi
+file dev/acpi/nxpiic_acpi.c nxpiic_acpi
+
# AMD Cryptographic Coprocessor
attach amdccp at acpinodebus with amdccp_acpi
file dev/acpi/amdccp_acpi.c amdccp_acpi
diff -r 1d4922123b7e -r c8aad7e34770 sys/dev/acpi/nxpiic_acpi.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/acpi/nxpiic_acpi.c Sun Jan 24 18:02:51 2021 +0000
@@ -0,0 +1,149 @@
+/* $NetBSD: nxpiic_acpi.c,v 1.1 2021/01/24 18:02:51 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2021 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jared McNeill <jmcneill%invisible.ca@localhost>.
+ *
+ * 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: nxpiic_acpi.c,v 1.1 2021/01/24 18:02:51 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_intr.h>
+#include <dev/acpi/acpi_i2c.h>
+
+#include <dev/i2c/motoi2cvar.h>
+#include <dev/i2c/motoi2creg.h>
+
+struct nxpiic_softc {
+ device_t sc_dev;
+ struct motoi2c_softc sc_motoi2c;
+};
+
+static int nxpiic_acpi_match(device_t, cfdata_t, void *);
+static void nxpiic_acpi_attach(device_t, device_t, void *);
+
+static uint8_t nxpiic_acpi_iord(struct motoi2c_softc *, bus_size_t);
+static void nxpiic_acpi_iowr(struct motoi2c_softc *, bus_size_t, uint8_t);
+
+CFATTACH_DECL_NEW(nxpiic_acpi, sizeof(struct nxpiic_softc),
+ nxpiic_acpi_match, nxpiic_acpi_attach, NULL, NULL);
+
+static const char * const compatible[] = {
+ "NXP0001",
+ NULL
+};
+
+static int
+nxpiic_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
+nxpiic_acpi_attach(device_t parent, device_t self, void *aux)
+{
+ struct nxpiic_softc * const sc = device_private(self);
+ struct motoi2c_softc * const msc = &sc->sc_motoi2c;
+ struct acpi_attach_args *aa = aux;
+ struct acpi_resources res;
+ struct acpi_mem *mem;
+ ACPI_INTEGER clock_freq;
+ ACPI_STATUS rv;
+ int error;
+
+ sc->sc_dev = self;
+ msc->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;
+ }
+
+ rv = acpi_dsd_integer(aa->aa_node->ad_handle, "clock-frequency",
+ &clock_freq);
+ if (ACPI_FAILURE(rv) || clock_freq == 0) {
+ aprint_error_dev(self, "couldn't get clock frequency\n");
+ goto done;
+ }
+
+ error = bus_space_map(msc->sc_iot, mem->ar_base, mem->ar_length, 0,
+ &msc->sc_ioh);
+ if (error) {
+ aprint_error_dev(self, "couldn't map registers\n");
+ return;
+ }
+
+ msc->sc_iord = nxpiic_acpi_iord;
+ msc->sc_iowr = nxpiic_acpi_iowr;
+ msc->sc_child_devices = acpi_enter_i2c_devs(aa->aa_node);
+
+ motoi2c_attach_common(self, msc, NULL);
+
+done:
+ acpi_resource_cleanup(&res);
+
+}
+
+static uint8_t
+nxpiic_acpi_iord(struct motoi2c_softc *msc, bus_size_t off)
+{
+ KASSERT((off & 3) == 0);
+
+ if (off >= I2CDFSRR)
+ return 0;
+
+ return bus_space_read_1(msc->sc_iot, msc->sc_ioh, off >> 2);
+}
+
+static void
+nxpiic_acpi_iowr(struct motoi2c_softc *msc, bus_size_t off, uint8_t val)
+{
+ KASSERT((off & 3) == 0);
+
+ if (off >= I2CDFSRR)
+ return;
+
+ bus_space_write_1(msc->sc_iot, msc->sc_ioh, off >> 2, val);
+}
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