Author: manu
Date: Wed Dec 12 22:01:06 2018
New Revision: 342012
URL: https://svnweb.freebsd.org/changeset/base/342012
Log:
arm64: marvell: Add driver for Marvell Ap806 System Controller
The first two clocks are for the clusters and their frequencies can be
found reading a register. Then a fixed 1200Mhz clock is present and two
fixed clocks, 'mss' which is 1200 / 6 and 'sdio' which is 1200 / 3.
Sponsored by: Rubicon Communications, LLC ("Netgate")
Added:
head/sys/arm/mv/mv_ap806_clock.c (contents, props changed)
Modified:
head/sys/conf/files.arm64
Added: head/sys/arm/mv/mv_ap806_clock.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/mv/mv_ap806_clock.c Wed Dec 12 22:01:06 2018
(r342012)
@@ -0,0 +1,210 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2018 Rubicon Communications, LLC (Netgate)
+ *
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/rman.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+
+#include <machine/bus.h>
+#include <machine/resource.h>
+#include <machine/intr.h>
+
+#include <dev/fdt/simplebus.h>
+
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <dev/extres/clk/clk_fixed.h>
+
+static struct clk_fixed_def ap806_clk_cluster_0 = {
+ .clkdef.id = 0,
+ .clkdef.name = "ap806-cpu-cluster-0",
+ .freq = 0,
+};
+
+static struct clk_fixed_def ap806_clk_cluster_1 = {
+ .clkdef.id = 1,
+ .clkdef.name = "ap806-cpu-cluster-1",
+ .freq = 0,
+};
+
+static struct clk_fixed_def ap806_clk_fixed = {
+ .clkdef.id = 2,
+ .clkdef.name = "ap806-fixed",
+ .freq = 1200000000,
+};
+
+/* Thoses are the only exported clocks AFAICT */
+
+static const char *mss_parents[] = {"ap806-fixed"};
+static struct clk_fixed_def ap806_clk_mss = {
+ .clkdef.id = 3,
+ .clkdef.name = "ap806-mss",
+ .clkdef.parent_names = mss_parents,
+ .clkdef.parent_cnt = 1,
+ .mult = 1,
+ .div = 6,
+};
+
+static const char *sdio_parents[] = {"ap806-fixed"};
+static struct clk_fixed_def ap806_clk_sdio = {
+ .clkdef.id = 4,
+ .clkdef.name = "ap806-sdio",
+ .clkdef.parent_names = sdio_parents,
+ .clkdef.parent_cnt = 1,
+ .mult = 1,
+ .div = 3,
+};
+
+struct mv_ap806_clock_softc {
+ struct simplebus_softc simplebus_sc;
+ device_t dev;
+ struct resource *res;
+};
+
+static struct resource_spec mv_ap806_clock_res_spec[] = {
+ { SYS_RES_MEMORY, 0, RF_ACTIVE | RF_SHAREABLE },
+ { -1, 0 }
+};
+
+static struct ofw_compat_data compat_data[] = {
+ {"marvell,ap806-clock", 1},
+ {NULL, 0}
+};
+
+#define RD4(sc, reg) bus_read_4((sc)->res, (reg))
+#define WR4(sc, reg, val) bus_write_4((sc)->res, (reg), (val))
+
+static int
+mv_ap806_clock_probe(device_t dev)
+{
+
+ if (!ofw_bus_status_okay(dev))
+ return (ENXIO);
+
+ if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
+ return (ENXIO);
+
+ device_set_desc(dev, "Marvell AP806 Clock Controller");
+ return (BUS_PROBE_DEFAULT);
+}
+
+static int
+mv_ap806_clock_attach(device_t dev)
+{
+ struct mv_ap806_clock_softc *sc;
+ struct clkdom *clkdom;
+ uint64_t clock_freq;
+ uint32_t reg;
+
+ sc = device_get_softc(dev);
+ sc->dev = dev;
+
+ if (bus_alloc_resources(dev, mv_ap806_clock_res_spec, &sc->res) != 0) {
+ device_printf(dev, "cannot allocate resources for device\n");
+ return (ENXIO);
+ }
+
+ /*
+ * We might miss some combinations
+ * Those are the only possible ones on the mcbin
+ */
+ reg = RD4(sc, 0x400);
+ switch (reg & 0x1f) {
+ case 0x0:
+ case 0x1:
+ clock_freq = 2000000000;
+ break;
+ case 0x6:
+ clock_freq = 1800000000;
+ break;
+ case 0xd:
+ clock_freq = 1600000000;
+ break;
+ case 0x14:
+ clock_freq = 1333000000;
+ break;
+ default:
+ device_printf(dev, "Cannot guess clock freq with reg %x\n", reg
& 0x1f);
+ return (ENXIO);
+ break;
+ };
+
+ ap806_clk_cluster_0.freq = clock_freq;
+ ap806_clk_cluster_1.freq = clock_freq;
+ clkdom = clkdom_create(dev);
+
+ clknode_fixed_register(clkdom, &ap806_clk_cluster_0);
+ clknode_fixed_register(clkdom, &ap806_clk_cluster_1);
+ clknode_fixed_register(clkdom, &ap806_clk_fixed);
+ clknode_fixed_register(clkdom, &ap806_clk_mss);
+ clknode_fixed_register(clkdom, &ap806_clk_sdio);
+
+ clkdom_finit(clkdom);
+
+ if (bootverbose)
+ clkdom_dump(clkdom);
+ return (0);
+}
+
+static int
+mv_ap806_clock_detach(device_t dev)
+{
+
+ return (EBUSY);
+}
+
+static device_method_t mv_ap806_clock_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, mv_ap806_clock_probe),
+ DEVMETHOD(device_attach, mv_ap806_clock_attach),
+ DEVMETHOD(device_detach, mv_ap806_clock_detach),
+
+ DEVMETHOD_END
+};
+
+static devclass_t mv_ap806_clock_devclass;
+
+static driver_t mv_ap806_clock_driver = {
+ "mv_ap806_clock",
+ mv_ap806_clock_methods,
+ sizeof(struct mv_ap806_clock_softc),
+};
+
+EARLY_DRIVER_MODULE(mv_ap806_clock, simplebus, mv_ap806_clock_driver,
+ mv_ap806_clock_devclass, 0, 0, BUS_PASS_RESOURCE + BUS_PASS_ORDER_LATE);
Modified: head/sys/conf/files.arm64
==============================================================================
--- head/sys/conf/files.arm64 Wed Dec 12 22:00:05 2018 (r342011)
+++ head/sys/conf/files.arm64 Wed Dec 12 22:01:06 2018 (r342012)
@@ -90,6 +90,7 @@ arm/broadcom/bcm2835/bcm2835_wdog.c optional
soc_brcm
arm/broadcom/bcm2835/bcm2836.c optional soc_brcm_bcm2837 fdt
arm/broadcom/bcm2835/bcm283x_dwc_fdt.c optional dwcotg fdt
soc_brcm_bcm2837
arm/mv/mvebu_pinctrl.c optional mvebu_pinctrl fdt
+arm/mv/mv_ap806_clock.c optional SOC_MARVELL_8K
fdt
arm/mv/armada38x/armada38x_rtc.c optional mv_rtc fdt
arm/xilinx/uart_dev_cdnc.c optional uart soc_xilinx_zynq
arm64/acpica/acpi_machdep.c optional acpi
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