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Date:      Thu, 20 Oct 2016 11:26:51 +0000 (UTC)
From:      Wojciech Macek <wma@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   svn commit: r307669 - in head/sys: arm/annapurna/alpine boot/fdt/dts/arm conf
Message-ID:  <201610201126.u9KBQpX7069210@repo.freebsd.org>

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Author: wma
Date: Thu Oct 20 11:26:51 2016
New Revision: 307669
URL: https://svnweb.freebsd.org/changeset/base/307669

Log:
  Support for Alpine Serializer/Deserializer.
  
  The exported functions will be used by
  Alpine Ethernet driver.
  
  Obtained from:         Semihalf
  Submitted by:          Michal Stanek <mst@semihalf.com>
  Sponsored by:          Annapurna Labs
  Reviewed by:           wma
  Differential Revision: https://reviews.freebsd.org/D7763

Added:
  head/sys/arm/annapurna/alpine/alpine_serdes.c   (contents, props changed)
  head/sys/arm/annapurna/alpine/alpine_serdes.h   (contents, props changed)
Modified:
  head/sys/boot/fdt/dts/arm/annapurna-alpine.dts
  head/sys/conf/files.arm
  head/sys/conf/files.arm64

Added: head/sys/arm/annapurna/alpine/alpine_serdes.c
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ head/sys/arm/annapurna/alpine/alpine_serdes.c	Thu Oct 20 11:26:51 2016	(r307669)
@@ -0,0 +1,225 @@
+/*-
+ * Copyright (c) 2015,2016 Annapurna Labs Ltd. and affiliates
+ * All rights reserved.
+ *
+ * Developed by Semihalf.
+ *
+ * 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/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/bus.h>
+#include <sys/rman.h>
+#include <sys/conf.h>
+#include <sys/resource.h>
+
+#include <machine/bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include "al_serdes.h"
+#include "alpine_serdes.h"
+
+#define SERDES_NUM_GROUPS	5
+
+static void *serdes_base;
+static uint32_t serdes_grp_offset[] = {0, 0x400, 0x800, 0xc00, 0x2000};
+
+static struct alpine_serdes_eth_group_mode {
+	struct mtx			lock;
+	enum alpine_serdes_eth_mode	mode;
+	bool				mode_set;
+} alpine_serdes_eth_group_mode[SERDES_NUM_GROUPS];
+
+static int al_serdes_probe(device_t dev);
+static int al_serdes_attach(device_t dev);
+static int al_serdes_detach(device_t dev);
+
+static struct resource_spec al_serdes_spec[] = {
+	{ SYS_RES_MEMORY,	0,	RF_ACTIVE },
+	{ -1, 0 }
+};
+
+struct al_serdes_softc {
+	struct resource *res;
+};
+
+static device_method_t al_serdes_methods[] = {
+	DEVMETHOD(device_probe,		al_serdes_probe),
+	DEVMETHOD(device_attach,	al_serdes_attach),
+	DEVMETHOD(device_detach,	al_serdes_detach),
+
+	DEVMETHOD_END
+};
+
+static driver_t al_serdes_driver = {
+	"serdes",
+	al_serdes_methods,
+	sizeof(struct al_serdes_softc)
+};
+
+static devclass_t al_serdes_devclass;
+
+DRIVER_MODULE(al_serdes, simplebus, al_serdes_driver,
+    al_serdes_devclass, 0, 0);
+DRIVER_MODULE(al_serdes, ofwbus, al_serdes_driver,
+    al_serdes_devclass, 0, 0);
+
+static int
+al_serdes_probe(device_t dev)
+{
+
+	if (!ofw_bus_status_okay(dev))
+		return (ENXIO);
+
+	if (!ofw_bus_is_compatible(dev, "annapurna-labs,al-serdes"))
+		return (ENXIO);
+
+	device_set_desc(dev, "Alpine Serdes");
+
+	return (BUS_PROBE_DEFAULT);
+}
+
+static int
+al_serdes_attach(device_t dev)
+{
+	struct al_serdes_softc *sc;
+	int err;
+
+	sc = device_get_softc(dev);
+
+	err = bus_alloc_resources(dev, al_serdes_spec, &sc->res);
+	if (err != 0) {
+		device_printf(dev, "could not allocate resources\n");
+		return (err);
+	}
+
+	/* Initialize Serdes group locks and mode */
+	for (int i = 0; i < nitems(alpine_serdes_eth_group_mode); i++) {
+		mtx_init(&alpine_serdes_eth_group_mode[i].lock, "AlSerdesMtx",
+		    NULL, MTX_DEF);
+		alpine_serdes_eth_group_mode[i].mode_set = false;
+	}
+
+	serdes_base = (void *)rman_get_bushandle(sc->res);
+
+	return (0);
+}
+
+static int
+al_serdes_detach(device_t dev)
+{
+	struct al_serdes_softc *sc;
+
+	sc = device_get_softc(dev);
+
+	bus_release_resources(dev, al_serdes_spec, &sc->res);
+
+	for (int i = 0; i < nitems(alpine_serdes_eth_group_mode); i++) {
+		mtx_destroy(&alpine_serdes_eth_group_mode[i].lock);
+		alpine_serdes_eth_group_mode[i].mode_set = false;
+	}
+
+	return (0);
+}
+
+void *
+alpine_serdes_resource_get(uint32_t group)
+{
+	void *base;
+
+	base = NULL;
+	if (group >= SERDES_NUM_GROUPS)
+		return (NULL);
+
+	if (serdes_base != NULL)
+		base = (void *)((uintptr_t)serdes_base +
+		    serdes_grp_offset[group]);
+
+	return (base);
+}
+
+int
+alpine_serdes_eth_mode_set(uint32_t group, enum alpine_serdes_eth_mode mode)
+{
+	struct alpine_serdes_eth_group_mode *group_mode;
+
+	group_mode = &alpine_serdes_eth_group_mode[group];
+
+	if (serdes_base == NULL)
+		return (EINVAL);
+
+	if (group >= SERDES_NUM_GROUPS)
+		return (EINVAL);
+
+	mtx_lock(&group_mode->lock);
+
+	if (!group_mode->mode_set || (group_mode->mode != mode)) {
+		struct al_serdes_grp_obj obj;
+
+		al_serdes_handle_grp_init(alpine_serdes_resource_get(group),
+		    group, &obj);
+
+		if (mode == ALPINE_SERDES_ETH_MODE_SGMII)
+			obj.mode_set_sgmii(&obj);
+		else
+			obj.mode_set_kr(&obj);
+
+		group_mode->mode = mode;
+		group_mode->mode_set = true;
+	}
+
+	mtx_unlock(&group_mode->lock);
+
+	return (0);
+}
+
+void
+alpine_serdes_eth_group_lock(uint32_t group)
+{
+	struct alpine_serdes_eth_group_mode *group_mode;
+
+	group_mode = &alpine_serdes_eth_group_mode[group];
+
+	if (mtx_initialized(&group_mode->lock) == 0)
+		return;
+
+	mtx_lock(&group_mode->lock);
+}
+
+void
+alpine_serdes_eth_group_unlock(uint32_t group)
+{
+	struct alpine_serdes_eth_group_mode *group_mode;
+
+	group_mode = &alpine_serdes_eth_group_mode[group];
+
+	if (mtx_initialized(&group_mode->lock) == 0)
+		return;
+
+	mtx_unlock(&group_mode->lock);
+}

Added: head/sys/arm/annapurna/alpine/alpine_serdes.h
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ head/sys/arm/annapurna/alpine/alpine_serdes.h	Thu Oct 20 11:26:51 2016	(r307669)
@@ -0,0 +1,61 @@
+/*-
+ * Copyright (c) 2015,2016 Annapurna Labs Ltd. and affiliates
+ * All rights reserved.
+ *
+ * Developed by Semihalf.
+ *
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef __ALPINE_SERDES_H__
+#define __ALPINE_SERDES_H__
+
+/* SerDes ETH mode */
+enum alpine_serdes_eth_mode {
+	ALPINE_SERDES_ETH_MODE_SGMII,
+	ALPINE_SERDES_ETH_MODE_KR,
+};
+
+/*
+ * Get SerDes group regs base, to be used in relevant Alpine drivers.
+ * Valid group is 0..3.
+ * Returns virtual base address of the group regs base.
+ */
+void *alpine_serdes_resource_get(uint32_t group);
+
+/*
+ * Set SerDes ETH mode for an entire group, unless already set
+ * Valid group is 0..3.
+ * Returns 0 upon success.
+ */
+int alpine_serdes_eth_mode_set(uint32_t group,
+    enum alpine_serdes_eth_mode mode);
+
+/* Lock the all serdes group for using common registers */
+void alpine_serdes_eth_group_lock(uint32_t group);
+
+/* Unlock the all serdes group for using common registers */
+void alpine_serdes_eth_group_unlock(uint32_t group);
+
+#endif /* __ALPINE_SERDES_H__ */

Modified: head/sys/boot/fdt/dts/arm/annapurna-alpine.dts
==============================================================================
--- head/sys/boot/fdt/dts/arm/annapurna-alpine.dts	Thu Oct 20 11:23:59 2016	(r307668)
+++ head/sys/boot/fdt/dts/arm/annapurna-alpine.dts	Thu Oct 20 11:26:51 2016	(r307669)
@@ -159,6 +159,12 @@
 			interrupt-parent = <&MPIC>;
 		};
 
+		/* SerDes */
+		serdes {
+			compatible = "annapurna-labs,al-serdes";
+			reg = <0x28c0000 0x1000>;
+		};
+
 		serial0: serial@2883000 {
 			compatible = "ns16550";
 			reg = <0x2883000 0x20>;

Modified: head/sys/conf/files.arm
==============================================================================
--- head/sys/conf/files.arm	Thu Oct 20 11:23:59 2016	(r307668)
+++ head/sys/conf/files.arm	Thu Oct 20 11:26:51 2016	(r307669)
@@ -15,6 +15,9 @@ arm/annapurna/alpine/alpine_ccu.c		optio
 arm/annapurna/alpine/alpine_nb_service.c	optional al_nb_service fdt
 arm/annapurna/alpine/alpine_pci.c		optional al_pci fdt
 arm/annapurna/alpine/alpine_pci_msix.c		optional al_pci fdt
+arm/annapurna/alpine/alpine_serdes.c		optional al_serdes fdt		\
+	no-depend	\
+	compile-with "${CC} -c -o ${.TARGET} ${CFLAGS} -I$S/contrib/alpine-hal -I$S/contrib/alpine-hal/eth ${PROF} ${.IMPSRC}"
 arm/arm/autoconf.c		standard
 arm/arm/bcopy_page.S		standard
 arm/arm/bcopyinout.S		standard

Modified: head/sys/conf/files.arm64
==============================================================================
--- head/sys/conf/files.arm64	Thu Oct 20 11:23:59 2016	(r307668)
+++ head/sys/conf/files.arm64	Thu Oct 20 11:26:51 2016	(r307669)
@@ -42,6 +42,9 @@ arm/annapurna/alpine/alpine_ccu.c		optio
 arm/annapurna/alpine/alpine_nb_service.c	optional	al_nb_service fdt
 arm/annapurna/alpine/alpine_pci.c		optional	al_pci fdt
 arm/annapurna/alpine/alpine_pci_msix.c		optional	al_pci fdt
+arm/annapurna/alpine/alpine_serdes.c		optional al_serdes fdt		\
+	no-depend	\
+	compile-with "${CC} -c -o ${.TARGET} ${CFLAGS} -I$S/contrib/alpine-hal -I$S/contrib/alpine-hal/eth ${PROF} ${.IMPSRC}"
 arm/arm/generic_timer.c		standard
 arm/arm/gic.c			standard
 arm/arm/gic_fdt.c		optional	fdt



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