[src/trunk]: src/sys/dev/fdt fdt: add SPI controller frontend

[tnn <tnn%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/0c94d3eee8a5
branches:  trunk
changeset: 453472:0c94d3eee8a5
user:      tnn <tnn%NetBSD.org@localhost>
date:      Tue Aug 13 16:46:49 2019 +0000

description:
fdt: add SPI controller frontend

diffstat:

 sys/dev/fdt/fdt_spi.c |  114 ++++++++++++++++++++++++++++++++++++++++++++++++++
 sys/dev/fdt/fdtvar.h  |    9 +++-
 sys/dev/fdt/files.fdt |    3 +-
 3 files changed, 124 insertions(+), 2 deletions(-)

diffs (172 lines):

diff -r a84c1c217937 -r 0c94d3eee8a5 sys/dev/fdt/fdt_spi.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/fdt/fdt_spi.c     Tue Aug 13 16:46:49 2019 +0000
@@ -0,0 +1,114 @@
+/* $NetBSD: fdt_spi.c,v 1.1 2019/08/13 16:46:49 tnn Exp $ */
+
+/*
+ * Copyright (c) 2019 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Tobias Nygren.
+ *
+ * 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: fdt_spi.c,v 1.1 2019/08/13 16:46:49 tnn Exp $");
+
+#include <sys/param.h>
+#include <sys/device.h>
+#include <sys/bus.h>
+#include <sys/kmem.h>
+#include <sys/queue.h>
+#include <dev/spi/spivar.h>
+#include <libfdt.h>
+#include <dev/fdt/fdtvar.h>
+
+struct fdtbus_spi_controller {
+       device_t spi_dev;
+       int spi_phandle;
+       const struct fdtbus_spi_controller_func *spi_funcs;
+       LIST_ENTRY(fdtbus_spi_controller) spi_next;
+};
+
+static LIST_HEAD(, fdtbus_spi_controller) fdtbus_spi_controllers =
+    LIST_HEAD_INITIALIZER(fdtbus_spi_controllers);
+
+int
+fdtbus_register_spi_controller(device_t dev, int phandle,
+    const struct fdtbus_spi_controller_func *funcs)
+{
+       struct fdtbus_spi_controller *spi;
+
+       spi = kmem_alloc(sizeof(*spi), KM_SLEEP);
+       spi->spi_dev = dev;
+       spi->spi_phandle = phandle;
+       spi->spi_funcs = funcs;
+
+       LIST_INSERT_HEAD(&fdtbus_spi_controllers, spi, spi_next);
+
+       return 0;
+}
+
+static struct spi_controller *
+fdtbus_get_spi_controller(int phandle)
+{
+       struct fdtbus_spi_controller *spi;
+
+       LIST_FOREACH(spi, &fdtbus_spi_controllers, spi_next) {
+               if (spi->spi_phandle == phandle) {
+                       return spi->spi_funcs->get_controller(spi->spi_dev);
+               }
+       }
+       return NULL;
+}
+
+device_t
+fdtbus_attach_spibus(device_t dev, int phandle, cfprint_t print)
+{
+       struct spi_controller *spi;
+       struct spibus_attach_args sba;
+       prop_dictionary_t devs;
+       device_t ret;
+       u_int address_cells;
+
+       devs = prop_dictionary_create();
+       if (of_getprop_uint32(phandle, "#address-cells", &address_cells))
+               address_cells = 1;
+       of_enter_spi_devs(devs, phandle, address_cells * 4);
+
+       spi = fdtbus_get_spi_controller(phandle);
+       KASSERT(spi != NULL);
+       memset(&sba, 0, sizeof(sba));
+       sba.sba_controller = spi;
+
+       sba.sba_child_devices = prop_dictionary_get(devs, "spi-child-devices");
+       if (sba.sba_child_devices)
+               prop_object_retain(sba.sba_child_devices);
+       prop_object_release(devs);
+
+       ret = config_found_ia(dev, "spibus", &sba, print);
+       if (sba.sba_child_devices)
+               prop_object_release(sba.sba_child_devices);
+
+       return ret;
+}
+
+
diff -r a84c1c217937 -r 0c94d3eee8a5 sys/dev/fdt/fdtvar.h
--- a/sys/dev/fdt/fdtvar.h      Tue Aug 13 16:37:15 2019 +0000
+++ b/sys/dev/fdt/fdtvar.h      Tue Aug 13 16:46:49 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: fdtvar.h,v 1.52 2019/06/14 11:08:18 hkenken Exp $ */
+/* $NetBSD: fdtvar.h,v 1.53 2019/08/13 16:46:49 tnn Exp $ */
 
 /*-
  * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -82,6 +82,10 @@
        i2c_tag_t (*get_tag)(device_t);
 };
 
+struct fdtbus_spi_controller_func {
+       struct spi_controller * (*get_controller)(device_t);
+};
+
 struct fdtbus_gpio_controller;
 
 struct fdtbus_gpio_pin {
@@ -253,6 +257,8 @@
                    const struct fdtbus_interrupt_controller_func *);
 int            fdtbus_register_i2c_controller(device_t, int,
                    const struct fdtbus_i2c_controller_func *);
+int            fdtbus_register_spi_controller(device_t, int,
+                   const struct fdtbus_spi_controller_func *);
 int            fdtbus_register_gpio_controller(device_t, int,
                    const struct fdtbus_gpio_controller_func *);
 int            fdtbus_register_pinctrl_config(device_t, int,
@@ -370,6 +376,7 @@
 void           fdtbus_power_poweroff(void);
 
 device_t       fdtbus_attach_i2cbus(device_t, int, i2c_tag_t, cfprint_t);
+device_t       fdtbus_attach_spibus(device_t, int, cfprint_t);
 
 bool           fdtbus_set_data(const void *);
 const void *   fdtbus_get_data(void);
diff -r a84c1c217937 -r 0c94d3eee8a5 sys/dev/fdt/files.fdt
--- a/sys/dev/fdt/files.fdt     Tue Aug 13 16:37:15 2019 +0000
+++ b/sys/dev/fdt/files.fdt     Tue Aug 13 16:46:49 2019 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.fdt,v 1.44 2019/03/13 12:17:45 jmcneill Exp $
+# $NetBSD: files.fdt,v 1.45 2019/08/13 16:46:49 tnn Exp $
 
 include        "external/bsd/libfdt/conf/files.libfdt"
 
@@ -64,6 +64,7 @@
 file   dev/fdt/fdt_regulator.c                 fdt
 file   dev/fdt/fdt_reset.c                     fdt
 file   dev/fdt/fdt_rtc.c                       fdt
+file   dev/fdt/fdt_spi.c                       fdt
 file   dev/fdt/fdt_syscon.c                    fdt
 file   dev/fdt/fdt_pinctrl.c                   fdt